California Form BOE-58-G is the Claim for Reassessment Exclusion for Transfer from Grandparent to Grandchild that a qualified grandchild files with the County Assessor to keep a grandparent’s old (lower) property tax base when real property passes down across a “skipped” generation. The grandchild signs and files the claim, and if the Assessor approves it, the property is not reassessed to current market value at transfer.
For transfers on or after February 16, 2021, the rules changed dramatically under Proposition 19, which is now codified at Revenue & Taxation Code § 63.2. The State Board of Equalization reports that grandparent-grandchild claims have dropped by more than 75% since Prop 19 took effect, because the exclusion now applies only to a family home or family farm the grandchild will use as a principal residence — and only up to a $1 million-over-taxable-value cap.
In this guide you will learn:
- 📋 What every field, box, and signature line on BOE-58-G actually asks and how to answer it
- 🏠 How Prop 19’s family-home and family-farm rules limit (or kill) the old grandparent-grandchild exclusion
- 🧾 Which death certificates, deeds, trust documents, and birth certificates to attach
- ⏰ The exact 3-year, pre-third-party-transfer, and 6-month-after-notice deadlines that decide whether your claim lives or dies
- 🧮 Three full filled-in scenarios — including a trust transfer and a pre-Prop 19 legacy claim — with the math the Assessor will run
What the Form Is and Who Must File It
BOE-58-G is the prescribed statewide claim form the California State Board of Equalization issues so that grandchildren can ask the County Assessor to exclude a grandparent-to-grandchild real property transfer from “change in ownership” reassessment. Without an approved BOE-58-G, the Assessor must reset the property’s taxable value to its full cash value on the date of transfer under R&TC § 60. The result of a missed claim is often a property tax bill 3–10 times higher than what the grandparent paid.
The form is filed by the transferee grandchild — the person receiving the property — not by the grandparent’s estate, the trustee, or the attorney. If the grandchild is a minor, a parent or court-appointed guardian signs on their behalf. Where two or more grandchildren receive the same property, each grandchild files a separate BOE-58-G for their proportional interest.
To qualify for the exclusion, all parents of the grandchild who would otherwise qualify as a “child” of the grandparent under R&TC § 63.1(c) must be deceased as of the date of transfer (with a narrow son-in-law / daughter-in-law rule). This “deceased middle generation” requirement is the single most important eligibility hurdle. Stepparents and in-laws living on the date of transfer can disqualify a claim if they were the bridge between grandparent and grandchild.
Two different statutes now govern these claims, and the date of transfer controls which one applies. Transfers before February 16, 2021 are decided under the legacy R&TC § 63.1 (principal residence of unlimited value plus $1 million of other real property assessed value). Transfers on or after February 16, 2021 are decided under R&TC § 63.2, which the BOE has interpreted in successive Letters to Assessors and limits the exclusion to a family home or family farm the grandchild will occupy as a principal residence within one year.
The current revision date printed on the form is shown in the lower-left corner of page 1; confirm you have the post-Prop 19 version (revision December 2022 or later) before you fill anything in. Older PDFs still circulate online and use the legacy § 63.1 framework.
Before You Start: Documents and Information You Need
Filling out BOE-58-G without the right paperwork in front of you is the fastest way to make a mistake the Assessor will catch. Pull every document below into one folder before you open the form. The Assessor cross-checks each entry against recorded instruments and vital records, so the numbers and names on your claim must match those documents exactly.
The pre-filing checklist:
- Certified death certificate of the grandparent transferor — needed to anchor the date of transfer for any post-death transfer; without it the Assessor cannot date-stamp the change in ownership.
- Certified death certificate(s) of the grandchild’s parent(s) who were the grandparent’s child(ren) — this is what proves the “deceased middle generation” rule of R&TC § 63.2(b); a missing parent death certificate is the #1 reason claims are denied.
- Birth certificates establishing the parent-child-grandchild chain — the Assessor uses these to confirm a blood or legally recognized adoptive relationship; missing links break the claim.
- The recorded deed, court order, or trust distribution document transferring the property — needed for the document number, recording date, and legal description.
- The Preliminary Change of Ownership Report (PCOR / BOE-502-A) filed with the deed — the Assessor matches Box-for-Box answers between the PCOR and BOE-58-G.
- The grandparent’s most recent property tax bill — gives you the Assessor’s Parcel Number (APN) and the existing factored base year value you are trying to keep.
- The Homeowners’ Exemption claim (BOE-266) the grandparent had on file (if the property was their principal residence) — required to claim the family home exclusion under Prop 19.
- Proof the grandchild will occupy the property as a principal residence within 1 year — voter registration, driver’s license change, utility hookups, and a filed BOE-266 in the grandchild’s name; without occupancy the Prop 19 family home exclusion evaporates.
- The trust instrument (if any) — the Assessor needs to see the dispositive provisions to confirm the grandchild is a present beneficiary and not a contingent one.
- The grandchild’s Social Security Number — required on the signature page; the SSN is held confidentially under R&TC § 63.1(g).
If even one of these is missing, file the claim anyway to lock in the deadline, then supplement. The Assessor will request what is missing in writing rather than auto-deny.
Where to Get the Form and How to Access It
The official statewide PDF lives on the BOE’s property tax forms library at boe.ca.gov/proptaxes/pdf/boe58g.pdf. Always download a fresh copy each filing because the BOE updates the form when statutes or regulations change. Saving and reusing an old PDF is how filers end up using a pre-Prop 19 version that omits the family-home certification box.
Most county assessors host their own branded version of the same form on their websites, and a few accept secure online submissions. The Los Angeles County Assessor hosts a fillable version and a portal upload page. The Orange County Assessor provides a fillable PDF and a secure document-drop. The San Diego County Assessor and the Santa Clara County Assessor both list BOE-58-G alongside their parent-child counterpart, BOE-58-AH.
If the property is in a smaller county, search “[county name] assessor BOE-58-G” or call the assessor’s office. The county-branded form is legally identical to the BOE master, but the mailing address, document drop URL, and instructions on the cover page differ by county. Filing the form with the wrong county assessor (e.g., where the grandchild lives instead of where the property sits) is a common error that wastes the deadline.
You may also pick up the form in person at the County Assessor’s public counter, by phone request mailed to your address, or by email request to the Assessor’s exclusions unit. There is no fee to obtain the form, and there is no fee to file it. The form must be the BOE-prescribed version; counties cannot accept a self-drafted substitute under Property Tax Rule 462.240.
Step-by-Step: How to Fill Out BOE-58-G Line by Line
The form is a single double-sided page with a header block, three lettered sections (A, B, and C), an attachments page (Section D in some county versions), and a signature/certification block. Work top to bottom and never skip a field — even “N/A” must be written in fields that do not apply. The walkthrough below mirrors the December 2022 BOE master, which is also the version published by the California State Board of Equalization.
Header: Assessor’s Parcel Number (APN)
The APN is the unique identifier the County Assessor uses to track the parcel. You will find it on the grandparent’s most recent tax bill and on the recorded deed. Enter it exactly as printed, including dashes and leading zeros, in the top-right block of page 1.
Maria Lopez writes 5123-014-027 in the APN box, copying it letter-for-letter from her grandfather’s 2024 secured property tax bill.
A common edge case is multi-parcel transfers. If the grandparent transferred two parcels in one deed, file a separate BOE-58-G for each APN — the Assessor processes one parcel per claim.
The most common mistake here is transposing digits or dropping a leading zero, which causes the Assessor’s system to either reject the claim or apply it to the wrong parcel. The misconception filers often carry is that the APN is the same as the street address; it is not, and entering only an address will get the form returned.
Header: Property Address and City
Enter the situs (physical) address of the property, not the grandchild’s mailing address. Use the address as it appears on the recorded deed and the tax bill. Include the city, ZIP code, and county.
Maria writes 1428 Sycamore Lane, Pasadena, CA 91106, Los Angeles County in the property address line.
If the parcel has no street address (raw land), write “Vacant land — see legal description attached” and attach a copy of the legal description from the deed. The Assessor needs an address or a legal description to find the parcel in its rolls.
The most common mistake is entering the grandchild’s home address when they live elsewhere; the Assessor will then look at the wrong parcel and may deny the exclusion. The misconception is that the mailing address controls — it never does for property tax purposes.
Header: Date of Transfer / Date of Death
Enter the date the legal title changed. For a transfer at death, this is the date of the grandparent’s death, not the date of the deed of distribution. For a lifetime transfer, it is the date the deed was signed and delivered, even if recording happened later.
Carlos Mendoza writes 04/12/2024 because his grandmother died on April 12, 2024, even though the trustee’s deed wasn’t recorded until October 2024.
A subtle nuance: for transfers from a revocable trust, the date of transfer is the date the trust became irrevocable (usually the grandparent’s death), per BOE Letter to Assessors 91/08. Using the recording date by mistake can cost the exclusion if it pushes you past 3 years.
The common mistake is writing the deed-recording date, which can place the transfer after the deadline window or — worse — before the parent’s death (breaking the deceased-middle-generation rule on paper). The misconception is that “transfer” means recording; it means change in ownership.
Section A — Transferor (Grandparent) Information
This section names the grandparent who transferred the property and confirms the family relationship to the grandchild. You must list the grandparent’s full legal name, the grandparent’s relationship to the grandchild’s deceased parent, and the date of the grandparent’s death (if any).
Maria writes Roberto Eduardo Lopez, paternal grandfather, deceased 02/03/2025.
The edge case here is when the grandparent is still alive (a lifetime transfer). Write “Living” in the date-of-death box and check the “lifetime transfer” indicator if your county’s form has one. Lifetime transfers from a grandparent to a grandchild are rare under Prop 19 because they only qualify if every middle-generation parent is deceased as of the date of the lifetime gift.
The most common mistake is naming a step-grandparent who never owned the property. Only the recorded titleholder counts as the transferor; the Assessor cross-checks Section A against the deed. The misconception is that a long-time spouse of the grandparent automatically qualifies — they do not, unless title actually passed through them.
Section A — Names and Dates of Death of Deceased Parent(s)
This is the line that decides eligibility. Identify every parent of the grandchild who was a child (biological or legally adopted) of the grandparent transferor, and provide the date of death for each. All such parents must be deceased on or before the date of transfer.
Maria writes Elena Lopez Reyes — mother — deceased 11/30/2022 because Elena was Roberto’s only child and Maria’s link to him.
The edge case the BOE has carved out is the son-in-law / daughter-in-law rule under R&TC § 63.2(b)(2). If the in-law parent has not remarried, they are still treated as a “parent” — and must also be deceased — for the grandchild to qualify. List that in-law on this line as well.
The most common mistake is leaving off a still-living non-blood parent of the grandchild who happens to be the in-law of the grandparent. The Assessor’s investigators will find that person through public records, and the claim will be denied. The misconception is that only the blood parent matters; the statute reaches in-laws unless they have remarried.
Section B — Transferee (Grandchild) Information
List every grandchild receiving an interest in the property, the percentage interest each receives, and each grandchild’s date of birth, address, and relationship to the deceased parent. Each grandchild must sign their own claim form for their interest.
Carlos Mendoza writes Carlos A. Mendoza — 50% — DOB 06/18/1992 — 922 Olive St., San Diego, CA 92103 — grandson via deceased mother Sofia Mendoza.
The edge case is when the deed transfers to a grandchild’s revocable trust rather than to the grandchild outright. The transfer still qualifies under Property Tax Rule 462.240(k), but you must attach a copy of the trust showing the grandchild as the present beneficiary.
The most common mistake is omitting a co-grandchild who took an interest, which causes the Assessor to misallocate the exclusion. The misconception is that one grandchild can sign for the others; each grandchild must individually certify under penalty of perjury.
Section B — Family Home / Family Farm Certification (Post-Prop 19)
Under Prop 19, the only real property eligible for grandparent-grandchild exclusion is a family home the grandchild will occupy as their principal residence within one year, or a family farm as defined in R&TC § 63.2(c)(2). Check the appropriate box and provide the date the grandchild moved in (or intends to move in) and the date the grandchild filed (or will file) BOE-266 Homeowners’ Exemption.
Carlos checks “Family Home” and writes Move-in date: 05/01/2024; BOE-266 filed 05/15/2024.
The edge case: if the grandchild was already living in the home with the grandparent before death, the move-in date is the date of transfer itself, and the BOE-266 must be filed within one year of that date. Missing the one-year window converts the exclusion into a partial reassessment.
The most common mistake is checking “Family Home” without filing a BOE-266 — the exclusion is conditional on the homeowners’ exemption being claimed and granted. The misconception is that you can rent the home out and still keep the exclusion; you cannot, except under the narrow disabled-veterans’ exemption substitute.
Section B — Full Cash Value and Factored Base Year Value
Enter the property’s full cash value (current market value) on the date of transfer, and the factored base year value (the assessed value that has been carrying forward since the grandparent’s last reassessment). Both numbers are needed because Prop 19 caps the exclusion at the factored base year value plus $1 million.
Carlos writes Full Cash Value: $1,750,000 and Factored Base Year Value: $325,000 based on the appraisal and the 2023-24 assessment roll.
The edge case is when the full cash value exceeds the factored base year value by more than $1 million. The exclusion is partial: the new taxable value equals the full cash value minus $1 million, per R&TC § 63.2(d).
The most common mistake is putting the purchase price the grandparent originally paid in the factored base year value box. The factored value is that purchase price grown by 2% per year (or annual CPI, whichever is less) under Prop 13. The misconception is that the exclusion always preserves the old value 1-for-1; under Prop 19 it only does so if the value gap is $1 million or less.
Section C — Description of Transfer
Describe how the property was transferred: by deed, by trust distribution, by court order in probate, or by intestate succession. Provide the recording date and document number of the transferring instrument and check the box that matches.
Janet Park writes “Transferred by Trustee’s Deed Upon Death recorded 09/14/2024 as Document No. 2024-0451223 in Orange County Official Records.”
The edge case is a transfer that occurred in two steps — for example, from grandparent to estate to grandchild. Each step is a separate transfer, but the BOE treats step-transfers through a will or trust as a single transfer from the grandparent for § 63.2 purposes; describe the chain on an attached page.
The most common mistake is leaving the document number blank, which slows the Assessor’s verification and can push approval past the next tax bill. The misconception is that the trustee’s deed dates the transfer; the date of death dates the transfer for tax purposes, even if the deed recorded years later.
Section C — Was the Property the Principal Residence of the Grandparent?
Check Yes or No. If yes, give the date the grandparent last filed BOE-266 for that property. The principal-residence answer is what unlocks the family-home exclusion path; without a yes here and a yes on the grandchild’s intended occupancy, only the family-farm path remains.
Maria checks Yes and writes Grandparent BOE-266 last filed 1998; homeowners’ exemption was active and on the roll through date of death.
The edge case is when the grandparent had recently moved into assisted living. Under R&TC § 63.2(c)(1)(B), the home is still treated as the grandparent’s principal residence if they were absent solely because of medical care.
The most common mistake is checking No when the grandparent had simply not refiled BOE-266 — the homeowners’ exemption only needs to be filed once and rolls forward. The misconception is that two homes can each be a principal residence; only one can be, per R&TC § 218.
Section C — Will the Property Be the Principal Residence of the Grandchild?
This is the Prop 19 occupancy certification. Check Yes only if the grandchild will move in within one year of the date of transfer and will keep the home as their principal residence going forward. Provide the planned (or actual) move-in date.
Carlos checks Yes and writes Move-in 05/01/2024.
The edge case: if multiple grandchildren take title but only one will live there, only the occupying grandchild’s interest qualifies for the family-home exclusion. The non-occupying grandchildren’s shares are reassessed on their pro-rata portions.
The common mistake is checking Yes optimistically and then renting the property; the Assessor reviews occupancy at the one-year mark and will reverse the exclusion retroactively, with escape assessments and interest. The misconception is that a vacation use counts as a principal residence; it does not.
Section D — Required Attachments Checklist
The form’s back page lists attachments the Assessor wants stapled or uploaded. Check each box and confirm the document is enclosed: certified death certificates, deed/trust, birth certificates, BOE-266, and any letters of administration.
Janet checks all five boxes and adds a sixth labeled “Trust Excerpt — Article 7.”
The edge case is when an original document is unavailable; submit a certified copy from the County Recorder or the Vital Records office. The Assessor will not accept plain photocopies of vital records.
The common mistake is submitting an informational (uncertified) copy of a death certificate; the Assessor must reject it under their internal verification rules. The misconception is that a notary can certify a vital record; only the issuing agency can.
Certification and Signature Block
The grandchild signs under penalty of perjury that every statement on the form is true. Print name, sign, date, and provide a daytime phone, email, mailing address, and the last four digits of the grandchild’s Social Security Number. If the grandchild is a minor or under conservatorship, the legal guardian signs and attaches court authority.
Maria signs Maria Elena Lopez, dates 03/15/2025, and writes SSN: –-4421.*
The edge case: if a grandchild lives outside the United States, a notarized signature is recommended even though the form does not strictly require notarization. This avoids handwriting disputes if the Assessor questions the certification.
The common mistake is having an attorney or trustee sign for the grandchild without a power of attorney attached; the Assessor will reject the signature. The misconception is that the trustee of the grandparent’s trust can sign — they cannot, because the transferee (grandchild) is the one certifying.
Three Filled-Out Examples Using Real Scenarios
Each scenario walks one named grandchild through BOE-58-G start to finish. The first is a clean post-Prop 19 family home transfer. The second is a partial exclusion where the value gap exceeds $1 million. The third is a pre-Prop 19 legacy claim still being filed within the 3-year window.
Scenario 1 — Maria Lopez, Pasadena Family Home (Post-Prop 19, Full Exclusion)
Maria is 28 and recently lost her grandfather Roberto. Her mother Elena (Roberto’s only child) died in 2022. Maria moves into Roberto’s Pasadena bungalow within two months of his death and files a BOE-266 in her own name.
| Form Section | What Maria Enters |
|---|---|
| APN | 5123-014-027 |
| Property Address | 1428 Sycamore Lane, Pasadena, CA 91106, LA County |
| Date of Transfer | 02/03/2025 (date of death) |
| Section A — Transferor | Roberto Eduardo Lopez, paternal grandfather |
| Section A — Deceased Parent | Elena Lopez Reyes, mother, died 11/30/2022 |
| Section B — Transferee | Maria Elena Lopez, 100%, DOB 04/22/1996 |
| Section B — Family Home Box | Checked; move-in 04/01/2025; BOE-266 filed 04/10/2025 |
| Section B — Values | Full Cash Value $1,150,000; Factored BYV $310,000 |
| Section C — Recording | Affidavit of Death of Trustee, Doc 2025-0223115 |
| Signature | Maria Elena Lopez, 04/15/2025 |
Because the gap between full cash value ($1.15M) and factored base year value ($310K) is $840,000 — under $1 million — the exclusion is full. Maria keeps the $310K base.
Scenario 2 — Carlos Mendoza, Coronado Beach House (Post-Prop 19, Partial Exclusion)
Carlos is 32 and inherits his grandmother Sofia’s beachfront condo in Coronado. His father Hector (Sofia’s son) died in 2019. Carlos moves in and rents out his San Diego apartment.
| Form Section | What Carlos Enters |
|---|---|
| APN | 537-281-09-15 |
| Property Address | 18 Ocean Blvd #4, Coronado, CA 92118 |
| Date of Transfer | 07/22/2025 |
| Section A — Transferor | Sofia Mendoza, paternal grandmother, deceased 07/22/2025 |
| Section A — Deceased Parent | Hector Mendoza, father, died 05/14/2019 |
| Section B — Transferee | Carlos A. Mendoza, 100%, DOB 06/18/1992 |
| Section B — Family Home Box | Checked; move-in 08/15/2025; BOE-266 filed 08/20/2025 |
| Section B — Values | Full Cash Value $2,400,000; Factored BYV $410,000 |
| Section C — Principal Res. of Grandparent | Yes; BOE-266 on file since 1986 |
| Signature | Carlos A. Mendoza, 09/01/2025 |
The gap is $1,990,000, well over the $1M cap. The exclusion is partial: new taxable value = full cash value minus $1,000,000 = $1,400,000. Carlos avoids reassessment to $2.4M but loses the deepest benefit of the old base.
Scenario 3 — Janet Park, Orange County Rental (Pre-Prop 19 Legacy Claim)
Janet’s grandmother Helen died on January 18, 2021 — before the Prop 19 cutoff. Janet’s father Daniel (Helen’s son) had died in 2017. Helen left Janet a duplex in Anaheim. Janet did not file BOE-58-G at the time and only learned of the requirement in late 2023 when an escape assessment notice arrived.
| Form Section | What Janet Enters |
|---|---|
| APN | 082-451-22 |
| Property Address | 317 W. Vermont Ave, Anaheim, CA 92805 |
| Date of Transfer | 01/18/2021 (date of death — pre-Prop 19) |
| Section A — Transferor | Helen Park, paternal grandmother |
| Section A — Deceased Parent | Daniel Park, father, died 03/05/2017 |
| Section B — Transferee | Janet Park, 100%, DOB 09/02/1985 |
| Statute Cited | R&TC § 63.1 (pre-Prop 19 framework) |
| Section B — $1M Allowance | Claiming against $1M lifetime cap; non-residence rental |
| Section C — Recording | Affidavit of Death recorded 03/30/2021, Doc 2021-0184502 |
| Signature | Janet Park, 11/12/2023 |
Because Janet filed within 6 months of the escape assessment notice under R&TC § 63.1(e)(1)(C), her claim is timely even though the 3-year mark has passed. The Orange County Assessor applies the legacy § 63.1 framework because the transfer occurred before February 16, 2021.
Aisha Robinson and Marcus Tate are two more named filers worth keeping in mind: Aisha is a single grandchild filing on a Sacramento family farm under § 63.2(c)(2), and Marcus is the trustee-grandchild of a Riverside trust filing for himself and his sister Tasha as 50/50 co-transferees.
How to File the Completed Form
File the completed BOE-58-G with the County Assessor in the county where the property sits, not the county where the grandchild lives. There is no filing fee for any channel. Always keep a stamped or scanned copy as proof of filing because the deadline is jurisdictional and the burden of proof is on the filer.
By Mail. Send the original signed claim and certified attachments by USPS Certified Mail with Return Receipt to the County Assessor’s Exclusions Unit. Sample address for Los Angeles County: Los Angeles County Assessor, Ownership Services Section, 500 W. Temple St., Room 205, Los Angeles, CA 90012. Processing time runs 6–16 weeks. Keep the green return receipt as proof of filing date.
Online. Several counties accept secure uploads. The LA County Assessor portal allows PDF uploads up to 25MB; the Orange County Assessor accepts encrypted email submissions through a portal link. Online channels typically reduce processing to 3–6 weeks, and the system emails a tracking number that doubles as proof of filing.
In Person. Walk the form into the public counter at the Assessor’s main office or any authorized branch. The clerk date-stamps a copy and hands it back. This is the only channel that gives you immediate proof of filing on the same day. Bring photo ID.
By Fax. A handful of smaller counties (e.g., Mendocino, Inyo) still accept fax submissions; confirm the fax number with the Assessor’s office before sending. Faxed claims are deemed filed on the date the fax is received, not the date it is processed. Keep the fax confirmation page as proof.
The deadline rules under R&TC § 63.2(j) are layered: file (a) within 3 years of the date of transfer, OR (b) before transfer of the property to a third party, OR (c) within 6 months after a notice of supplemental or escape assessment, whichever is later. Missing all three windows permanently forfeits the exclusion.
What Happens After You File
The Assessor’s exclusions unit logs the claim, opens a case file, and pulls the recorded deed, the PCOR, and any prior BOE-266 from the parcel’s history. An analyst checks each Section A and B answer against vital records, the deed, and the trust. If anything is missing, the analyst sends a request-for-information letter giving the filer a typical 30 days to supplement.
If the claim is approved, the Assessor issues a written determination and adjusts the property tax roll back to the date of transfer. Any reassessment notices already mailed are corrected and any tax already paid on the higher value is refunded with statutory interest under R&TC § 5151. The grandchild’s first corrected tax bill usually arrives within two billing cycles.
If the claim is denied, the Assessor issues a written denial with the legal grounds. The grandchild may file a Notice of Proposed Escape Assessment appeal with the County Assessment Appeals Board within 60 days of the denial notice. Appeals are heard de novo by a three-member panel.
A partial approval is also common — for example, the family-home portion qualifies but a non-residential portion does not. The Assessor will spell out the apportionment and the new taxable value in the determination letter. Read it line by line and appeal if the numbers do not match your understanding.
Mistakes to Avoid When Filling Out the Form
Each mistake below is a documented reason the Assessor denies grandparent-grandchild claims. Each one is fixable, but most of the fixes only work if caught before the deadline runs.
- Using the pre-Prop 19 form. Old PDFs lack the family-home certification box, and the Assessor will return them for re-filing — sometimes after the deadline.
- Listing only the blood parent and ignoring an in-law parent. The non-remarried in-law must also be deceased; missing this kills the claim.
- Writing the recording date instead of the date of death as the date of transfer, which can flip the timeline against the deceased-middle-generation rule.
- Filing in the wrong county. The claim must be filed where the property is, not where the grandchild lives.
- Claiming the family-home exclusion without filing BOE-266 in the grandchild’s name within one year.
- Submitting uncertified copies of vital records, which the Assessor cannot legally rely on.
- Forgetting to file a separate BOE-58-G for each grandchild when multiple grandchildren take title.
- Confusing factored base year value with original purchase price, which understates the actual taxable value the grandchild will keep.
- Failing to attach the trust instrument when title passes through a trust.
- Renting the inherited home within the first year, which voids the family-home exclusion and triggers escape assessments.
- Skipping Section D’s attachments checklist, which slows verification and can push the case past the deadline.
- Missing the 6-month-after-notice deadline by waiting to “see what happens” after a supplemental assessment letter arrives.
Do’s and Don’ts
Do download a fresh copy of BOE-58-G from the BOE site each time, because revisions matter for which statute applies.
Do file the claim before the deed is even recorded if possible — early filings are routinely accepted and they protect the grandchild against pre-third-party-transfer disqualification.
Do file BOE-266 the same week the grandchild moves into the family home, since the homeowners’ exemption is what locks in the Prop 19 exclusion.
Do keep certified mail receipts and county date-stamps in a permanent file, because the Assessor will sometimes ask for them years later during a roll audit.
Do call the Assessor’s exclusions unit if any document is missing — they would rather hold the file open than auto-deny.
Do consult Letters to Assessors before answering any unusual question; the BOE’s guidance is binding on county assessors.
Don’t sign the form before all fields are filled, because the certification covers everything above the signature line.
Don’t assume a step-grandparent or step-parent counts; only blood and legally recognized adoptive relationships qualify, with the narrow in-law rule.
Don’t wait until the second tax bill arrives to file; by then the 6-month notice clock may already be running.
Don’t rent out the family home within the first year of transfer.
Don’t submit the claim by regular email; use certified mail, in-person delivery, or the county portal.
Don’t discard the trust instrument, deed copies, or death certificates after filing — keep them for at least 10 years against escape assessments.
Pros and Cons of Filing on Your Own vs. With Help
Pros of filing pro se:
- No professional fee, which can save $500–$3,000 versus a CPA or estate attorney.
- The grandchild controls the timeline and is not waiting on a busy professional calendar.
- The form is short — one double-sided page — and the BOE’s instructions are public.
- Self-filing forces the grandchild to learn the rules, which helps when later property events (renting, selling, refinancing) trigger new tax questions.
- For simple post-Prop 19 family-home transfers under the $1M cap, the form is well-suited to careful pro se work.
Cons of filing pro se:
- One missed field or wrong date can cost tens of thousands of dollars in higher taxes.
- The interaction between R&TC § 63.1 and R&TC § 63.2 trips up many filers when transfers straddle the February 16, 2021 cutoff.
- The “all parents deceased” rule is unintuitive for blended families and frequently applied incorrectly.
- The full-cash-value vs. factored-base-year-value math is hard to get right without access to the parcel’s history.
- A denial appeal in front of the Assessment Appeals Board is harder to win without representation.
FAQs
Do I have to file BOE-58-G if my grandparent’s home transferred to me through a trust?
Yes. The form is required for any grandparent-to-grandchild change in ownership, including trust distributions, because trust transfers are change-in-ownership events under R&TC § 61(h).
Can I qualify if my grandparent is still alive?
Yes. A lifetime gift from grandparent to grandchild qualifies if every middle-generation parent is deceased on the date of the gift, and the property meets the family-home or family-farm definition under Prop 19.
Does the exclusion apply if I will rent out the inherited home?
No. Post-Prop 19, the family-home exclusion requires the grandchild to occupy the property as a principal residence within one year and continuously thereafter.
Do I write the date the deed was recorded in the date-of-transfer box?
No. Write the change-in-ownership date — usually the grandparent’s date of death — even if the deed was recorded weeks or months later.
Should I check “Family Home” if I own another house?
No. The home you inherit must be your principal residence; you can have only one principal residence at a time under R&TC § 218.
Is my mother’s name required in Section A even though she is the link, not the transferor?
Yes. Section A’s deceased-parent line requires the name and date of death of every parent who connects you to the grandparent transferor — that is the eligibility proof.
Can my still-living father (my grandparent’s son-in-law) disqualify me?
Yes. Unless he has remarried, the in-law parent must also be deceased on the date of transfer for the grandchild to qualify under R&TC § 63.2(b)(2).
Do I owe a filing fee to the County Assessor?
No. There is no fee to obtain or file BOE-58-G in any California county; counties cannot charge filers for change-in-ownership exclusion claims.
Will the Assessor accept my claim filed 4 years after my grandmother died?
Yes — but only if you file within 6 months of a notice of supplemental or escape assessment, or before any transfer of the property to a third party, under the layered deadlines of R&TC § 63.2(j).
Should I file one form for two parcels transferred at once?
No. File a separate BOE-58-G for each Assessor’s Parcel Number, because the Assessor processes one parcel per claim file.
Does my Social Security Number have to appear on the form?
Yes. The signature block requires it for verification, and the Assessor holds it confidentially under R&TC § 63.1(g).
Can my brother and I both qualify for the family-home exclusion if only I move in?
No. Only the occupying grandchild’s interest qualifies for the family-home exclusion; the non-occupying sibling’s share is reassessed on its pro-rata portion.
Is BOE-58-G the same as BOE-58-AH?
No. BOE-58-AH is the parent-to-child claim; BOE-58-G is the grandparent-to-grandchild claim, and the two are not interchangeable even though they share a similar layout.
Do I file BOE-58-G with the Franchise Tax Board?
No. The form is filed with the County Assessor where the property is located, never with the FTB or the IRS.
Related reading
- How to Fill Out Form BOE-19-P (w/Examples) + FAQs
- How to Fill Out California Form BOE-19-V (w/Examples) + FAQs
- How to Fill Out California Form BOE-58-AH (w/Examples) + FAQs
- How to Fill Out California Form BOE-19-B (w/Examples) + FAQs
- How to Fill Out California Form BOE-19-G (w/Examples) + FAQs
- How to Fill Out California Form BOE-502-A (w/Examples) + FAQs
- How to Fill Out California Form GC-200 (w/Examples) + FAQs