San Diego property tax: rates, bills, and how to appeal your assessment

Last updated 2026-07-09

How does property tax work in San Diego?

San Diego property tax starts with one law passed in 1978: California Proposition 13. Under Prop 13, your assessed value is capped at the purchase price (or the value the last time the property changed hands), and it can rise a maximum of 2% per year no matter what the market does. ^[1] That cap is the single most important number in your property tax life as a San Diego owner.

The base tax rate is 1% of assessed value. The state constitution fixes it. On top of that, every parcel in San Diego carries extra levies for voter-approved bonds, special districts, and other charges, usually another 0.1% to 0.2% depending on where you live. The San Diego County Auditor and Controller publishes the full rate for each tax rate area every year. ^[2]

So for a home assessed at $700,000, your base tax is $7,000. Add bond charges and the total bill runs $7,700 to $8,400, give or take. That's the math most San Diego owners face.

Your tax year runs July 1 through June 30. The first installment is due November 1 and becomes delinquent December 10. The second installment is due February 1 and becomes delinquent April 10. Miss either deadline and you owe a 10% penalty. ^[3] Miss the April 10 date and the county tacks a $10 redemption fee onto the unpaid amount.

Three separate county offices handle your taxes. The Assessor sets your assessed value. The Auditor-Controller calculates the tax. The Treasurer-Tax Collector sends the bill and takes your money. That division matters when you're disputing something, because you have to aim your complaint at the right office.

What is the actual property tax rate in San Diego County?

The 1% base rate is just the floor. Your real rate depends on your parcel's tax rate area (TRA), and the San Diego County Auditor and Controller posts TRA rates every year. ^[2] For fiscal year 2023-24, the countywide effective rate landed around 1.09% to 1.18% of assessed value once you add special assessments, bonds, and levies.

Here's a rough comparison across common San Diego communities, based on publicly reported effective rates:

Area	Approximate effective rate	Notes
City of San Diego (general)	~1.08% to 1.12%	Varies by sub-district
Chula Vista	~1.15% to 1.22%	Multiple Mello-Roos CFDs
Escondido	~1.10% to 1.15%
Carlsbad	~1.09% to 1.13%
Otay Ranch (new construction)	~1.25% to 1.50%+	Heavy Mello-Roos CFD charges
La Jolla (City of SD)	~1.08% to 1.10%	Lower CFD exposure

Mello-Roos Community Facilities Districts (CFDs) are the big variable. Newer subdivisions in the eastern and southern county carry substantial CFD charges that can push your effective rate past 1.5%. These aren't part of Prop 13's base rate, but they ARE on your tax bill, and they hit new-construction buyers hardest. ^[4]

To find your exact TRA and its rate, look up your parcel on the San Diego County Assessor's site using your Assessor's Parcel Number (APN). Every charge shows up line by line.

How does Prop 13 protect San Diego homeowners?

Prop 13 does two things most owners don't fully appreciate until they need them. First, it sets your base assessed value at your purchase price (called the "base year value"). Second, it caps annual increases at the California Consumer Price Index or 2%, whichever is lower. ^[1] A neighbor who bought the same floor plan 15 years ago can have an assessed value less than half of yours on an identical house.

That protection disappears on a change of ownership. When you buy, the assessor resets your base year value to the purchase price. Full stop. Every dollar of market runup that happened while the prior owner held the place lands in your tax bill from day one.

There are exceptions. Transfers between spouses don't trigger a reassessment. Before February 2021, transfers between parents and children were largely protected under Proposition 58. Then California voters passed Proposition 19 in November 2020, and it sharply narrowed those parent-child exclusions starting February 16, 2021. ^[5] If you inherited property after that date, the rules are much tighter. The exclusion now only covers a primary residence and caps the shielded amount at $1 million of value adjustment above the parent's assessed value. Inherited San Diego property after early 2021? Talk to a tax attorney or CPA before you assume anything.

Prop 13 also allows a temporary reduction when your property's current market value drops below its assessed value. That's a Proposition 8 review. More on that below.

Can you appeal a property tax assessment in San Diego?

Yes. Every property owner in San Diego has the legal right to appeal an assessed value to the San Diego County Assessment Appeals Board, a quasi-judicial body established under California Revenue and Taxation Code Section 1601. ^[6] There are two ways in.

Path 1 is a Proposition 8 review. This is an informal request to the County Assessor to temporarily lower your assessed value because current market value has fallen below your Prop 13 base year value. File it any time before the January 1 lien date. It's informal, free, and needs no hearing. The assessor reviews it and either agrees or declines. If the market recovers later, your value can climb back up to (but never past) your original base year value.

Path 2 is a formal appeal to the Assessment Appeals Board. You file this when you think the assessor's value is wrong regardless of market direction, or when you want an independent ruling. ^[6] Under Revenue and Taxation Code Section 1603, you have until November 30 of the fiscal year to file your Application for Changed Assessment. ^[6] For the 2024-25 tax year (July 2024 through June 2025), the deadline is November 30, 2024.

Missing November 30 is fatal. No grace period. No administrative exception for late filings. Do not forget this date.

How do you appeal your property tax assessment in San Diego?

The process is more manageable than most homeowners expect. Here's how it works.

Step 1: Get your assessment notice. The County Assessor mails notices of assessed value each year. If you got a supplemental assessment (triggered by a purchase or new construction), that notice runs on its own clock: 60 days from the mailing date, not November 30. ^[8] Read the notice carefully.

Step 2: Pull your comparable sales. You need recent arm's-length sales of properties like yours, in your neighborhood, that sold for less than your assessed value. The Assessor's office uses market data from the January 1 lien date. If you think your $800,000 assessed value is too high, you want sales of comparable homes around $700,000 or below. The San Diego County Assessor posts property sales data publicly. Zillow, Redfin, and MLS records work too, but you want exact addresses and closing dates you can drop onto a form.

Step 3: File the application. Download Application for Changed Assessment (form BOE-305-AH) from the California Board of Equalization. ^[7] File it with the San Diego County Clerk of the Board. As of 2024, the filing fee is $0 for most residential properties. Get the completed form in before November 30.

Step 4: Prepare your evidence. The burden of proof is on you. California law presumes the assessor's value is correct, so you have to knock that presumption down with real evidence: a licensed appraisal, a written sales comparison showing at least three comparable sales, or credible market data. Photos of condition problems that cut value help too.

Step 5: Attend your hearing. The Appeals Board schedules hearings months after your filing. They're informal but recorded. You present your evidence, the assessor presents theirs, and the board decides. You can bring a representative (a licensed appraiser or attorney) or go it alone. Most residential appeals get heard by a single hearing officer.

The TaxFightBack DIY Appeal Kit walks through building a comparable sales package from scratch, including the exact format San Diego's board expects, without the contingency fees the protest firms charge.

For Los Angeles County owners facing the same Prop 13 math, our Los Angeles County property tax guide covers the Southern California context.

What evidence wins a San Diego assessment appeal?

The strongest package pairs a licensed appraisal with three to five comparable sales. A licensed appraisal costs $400 to $800 in San Diego as of 2024, and it carries the most weight with the board because it reflects a professional's independent opinion of value as of the assessment date.

Don't want to pay for an appraisal? A self-prepared comparable sales analysis (a "sales comp grid") can work, but you have to be rigorous. The board wants sales within 90 days of the January 1 lien date, within half a mile if possible, with similar square footage, lot size, bed and bath count, age, and condition. Any adjustment for differences has to be explained and supportable.

Condition evidence matters more than people think. If your home has deferred maintenance, foundation trouble, outdated systems, or other defects the assessor's records don't reflect, document them with photos, contractor bids, or a written inspection report. The assessor usually values your property as if it's in average condition for its age. If it's worse than that, you have real value-reducing evidence.

Check the assessor's property characteristics card while you're at it. It's online. If the records show square footage or features that don't match reality, that's a factual error you can correct.

One thing that never works: your neighbor's lower tax bill. Because of Prop 13, different base year values are expected and legal. "My neighbor pays less" is not a ground for appeal. What matters is whether your assessed value tops current market value, or whether the assessor set the value in error when you bought.

How do San Diego supplemental assessments work?

A supplemental assessment is a one-time bill the county sends when a property changes ownership or new construction wraps up. It captures the difference between the prior owner's assessed value and your new base year value (usually your purchase price) for the slice of the year that's already passed. ^[8]

Timing drives the size. Buy in January and you're near the start of the tax year, so the supplemental is small. Buy in February and you're billed for almost a full year of the increased assessment.

Supplemental assessments carry their own appeal deadline: 60 days from the mailing date on the notice. ^[8] That window is separate from the November 30 deadline for regular assessments. New buyers miss it constantly, either because they don't realize a supplemental is appealable or because they're buried in moving boxes.

If you believe your purchase price didn't reflect true market value (say you overpaid in a bidding war, or the property had undisclosed problems), you can appeal the supplemental using the same BOE-305-AH form.

Calendar the 60-day deadline the moment that supplemental notice hits your mailbox.

What exemptions can reduce your San Diego property tax bill?

Several exemptions cut your assessed value before the tax rate ever applies.

The Homeowners' Exemption reduces your assessed value by $7,000, which saves roughly $70 a year at the 1% base rate. Small, but free. You apply once with the San Diego County Assessor and it stays put as long as the property is your primary residence. ^[9]

The Disabled Veterans' Exemption is far bigger. Veterans with a 100% service-connected disability rating qualify for an exemption on the first $196,262 of assessed value (the 2024 figure, indexed annually). Low-income disabled veterans may qualify for the exemption on up to $294,393 of assessed value. ^[9] That's a real savings of $2,000 to $3,000 a year.

Homeowners age 55 and older can transfer their Prop 13 base year value to a replacement home anywhere in California under Proposition 19. You get up to three transfers in your lifetime, and the replacement can cost more with a partial adjustment. ^[5] If you're downsizing, this is one of the strongest moves available to you.

Severely and permanently disabled homeowners have the same transfer right under Proposition 19.

Other exemptions exist for non-profits, religious organizations, and certain agricultural properties, but those are unlikely to touch the homeowners reading this.

File every exemption application directly with the San Diego County Assessor's office. Some carry annual deadlines.

How does San Diego compare to other major California counties?

San Diego's effective property tax rates sit in the middle of California's big urban counties. Los Angeles County uses the same Prop 13 structure but layers on different bonds and CFDs. San Francisco follows the identical statewide Prop 13 framework, though its assessed values tend to run higher because its real estate costs more.

Own property in San Francisco and wondering how to appeal a San Francisco property tax assessment? The process is nearly a carbon copy: base 1% rate, Prop 13 caps, same BOE-305-AH form, same Revenue and Taxation Code deadlines, but filed with the San Francisco Assessment Appeals Board.

Our sf property tax guide covers San Francisco in depth for owners in that market.

Across California, one set of state statutes governs the formal appeal process. The county-level differences are mostly the hearing calendar, local assessor practices, and how hard the assessor's office fights to defend its values at hearing. San Diego's board has a reputation for being professional and accessible to self-represented owners.

For owners in other high-value markets around the country, the Fairfax County property tax guide and the Cook property tax guide show how the process shakes out in Virginia and Illinois.

What happens after your San Diego appeal hearing?

The Assessment Appeals Board issues a written decision. Rule in your favor and the Assessor's office adjusts your assessed value, then the Auditor-Controller recalculates your bill. If you already paid on the higher value, you get a refund with interest. California Revenue and Taxation Code Section 5096 sets the refund rate at 3% per year. ^[10] Not a windfall, but real money if your appeal drags on for a year or more.

If the board rules against you, you have two options. Accept it, or file a lawsuit in Superior Court under Revenue and Taxation Code Section 5140. ^[12] Lawsuits are expensive and rarely worth it for residential properties unless the value gap is huge.

Here's the procedural trap: you generally have to pay your tax bill while your appeal is still pending. California law says pay first, get a refund later. Skip the payment and you rack up delinquency penalties regardless of your appeal status.

Win a lower base year value and that number becomes your new Prop 13 anchor. Future 2% caps apply to the lower figure. That compounding is worth doing the arithmetic on before you decide the appeal is worth your time. A $50,000 cut in assessed value saves about $500 a year at the 1% rate, and those savings compound forward every year you own the place.

Should you hire a tax agent or do it yourself?

Most residential San Diego appeals are simple enough to handle yourself, especially Proposition 8 reviews and appeals built on comparable sales. The county's forms are public, the hearings are designed for non-lawyers, and the assessor's staff will walk you through filing if you call.

Contingency firms usually charge 25% to 40% of the first year's tax savings. Cut your assessed value by $100,000, save $1,000 a year, and a 33% contingency hands the firm $330 of that first-year saving. Since the savings compound under Prop 13 every year you hold the property, that's a meaningful chunk of value walking out the door.

Where professional help earns its fee: complex commercial properties, income-producing properties where capitalized value methodology matters, unusual legal questions (estate transfers under Prop 19), or cases where your evidence is genuinely thin and you're not confident building a sales comp analysis.

For a standard residential appeal, a tidy comparable sales package and a clear grasp of the hearing process is enough. The TaxFightBack DIY Appeal Kit gives you the template and the walkthrough to build that package yourself and keep every dollar of the savings.

The California Board of Equalization's Assessment Appeals Manual is free online and surprisingly readable. ^[11]

Key San Diego property tax deadlines to keep on your calendar

Deadlines are where appeals die. Here's every date that matters.

Date	What it is
January 1	Lien date. Assessed value is set as of this date each year.
February 1	Second installment of current-year taxes is due.
April 10	Second installment becomes delinquent (10% penalty + $10 fee).
July 1	Start of new fiscal tax year. New assessed values take effect.
August (varies)	Annual assessment notices typically mailed by the Assessor.
November 1	First installment of current-year taxes is due.
November 30	Deadline to file formal assessment appeal with the Assessment Appeals Board. [6]
December 10	First installment becomes delinquent (10% penalty).
Within 60 days of notice	Deadline to appeal a supplemental assessment. [8]

The November 30 deadline is hard and statewide. It applies across every California county including San Diego, Los Angeles, and San Francisco. Revenue and Taxation Code Section 1603 sets it. ^[6]

Set a calendar reminder for November 1 every year. That leaves you a four-week buffer to pull your notice, check your assessed value against recent sales, and decide whether to file.

Frequently asked questions

How do I appeal my property tax assessment in San Diego?

File Application for Changed Assessment (form BOE-305-AH) with the San Diego County Clerk of the Board before November 30 of the tax year. Gather comparable sales or a licensed appraisal showing your property is worth less than its assessed value. Attend your scheduled hearing before the Assessment Appeals Board and present your evidence. Filing costs nothing for most residential properties.

Can you appeal a property tax assessment in California?

Yes. California Revenue and Taxation Code Section 1603 gives every property owner the right to appeal an assessed value to their county's Assessment Appeals Board. You have until November 30 of the fiscal year to file. You can also request an informal Proposition 8 review directly with the County Assessor any time before January 1 if current market value has dropped below your assessed value.

What is the property tax rate in San Diego County?

The base rate is 1% of assessed value, fixed by Proposition 13. Voter-approved bond charges and special district levies typically push the effective rate to 1.09% to 1.22% for most parcels. Newer subdivisions with Mello-Roos Community Facilities Districts can hit 1.25% to 1.50% or higher. Your exact rate depends on your tax rate area, which you can look up by APN on the San Diego County Assessor's website.

When are San Diego property taxes due?

The first installment covers July through December and is due November 1. It becomes delinquent after December 10 with a 10% penalty. The second installment covers January through June and is due February 1. It becomes delinquent after April 10, with a 10% penalty plus a $10 redemption fee. Both installments appear on the same annual bill from the San Diego County Treasurer-Tax Collector.

What is a Prop 13 base year value and can it be changed?

Your base year value is the assessed value set at the time of your most recent purchase or new construction. Under Prop 13, it rises a maximum of 2% per year. It can be changed by a formal appeal showing the original value was wrong, or reduced temporarily under Proposition 8 if market value falls below it. A change of ownership resets it to the new purchase price.

What is a supplemental tax bill in San Diego?

When you buy a home or finish new construction, San Diego issues a supplemental assessment for the part of the tax year already passed, at the increased value. The supplemental bill is separate from your annual tax bill. You have 60 days from the mailing date to appeal it. Many new buyers miss this window because they don't realize it's a separately appealable assessment.

How do I appeal a property tax assessment in San Francisco?

The process mirrors San Diego almost exactly. File form BOE-305-AH with the San Francisco Assessment Appeals Board by November 30 of the tax year. The same Prop 13 rules apply, and your assessed value resets to your purchase price on transfer. Bring comparable sales showing market value below your assessed value. For income property in San Francisco, an income-capitalization analysis usually carries more weight than comparable sales alone.

Does San Diego offer a homeowners' exemption?

Yes. The Homeowners' Exemption reduces your assessed value by $7,000, saving roughly $70 a year. You apply once with the San Diego County Assessor and it stays in place as long as the home is your primary residence. A Disabled Veterans' Exemption is far larger, shielding up to $196,262 (2024 figure) in assessed value for veterans with a 100% service-connected disability rating.

How long does a San Diego property tax appeal take?

Hearing dates swing a lot depending on the board's backlog. Residential appeals filed in fall often get heard anywhere from four months to over a year later. You pay your taxes as billed while you wait. Win and you get a refund with 3% annual interest under Revenue and Taxation Code Section 5096. Complex commercial or high-value cases tend to take longer.

What happens if I don't pay my San Diego property taxes?

Missing the December 10 or April 10 delinquency dates triggers an automatic 10% penalty. If the bill stays unpaid past June 30, the property enters tax default and more penalties and interest pile up. After five years of default, the county can start a tax sale. The Treasurer-Tax Collector's office does offer installment payment plans for owners who qualify under hardship provisions.

Can seniors transfer their property tax base in San Diego?

Yes. Under Proposition 19 (effective February 2021), homeowners age 55 and older can transfer their Prop 13 base year value to a replacement home anywhere in California up to three times in their lifetime. If the replacement home costs more, a partial adjustment applies. This is one of the most valuable planning tools a San Diego senior has when weighing a move.

Does a low appraisal from a purchase automatically lower my assessed value?

No. Your assessed value is typically set at your purchase price, not your lender's appraisal. If you believe you overpaid relative to true market value, or the appraisal shows a value well below your purchase price due to property defects, you can use that appraisal as evidence in an appeal. But the assessor starts from the sale price and presumes it reflects market value.

Is there a filing fee to appeal a San Diego property tax assessment?

For most residential properties, there is no filing fee. Some counties charge a nominal fee for larger commercial appeals, but single-family residential appeals in San Diego cost nothing to file. You submit form BOE-305-AH to the Clerk of the Board. Any professional representative you hire (appraiser, attorney, or tax agent) is a separate cost you negotiate privately.

What is a Mello-Roos tax and can I appeal it?

Mello-Roos charges are special taxes levied by Community Facilities Districts (CFDs) to fund infrastructure in newer subdivisions. They show up as a line item on your property tax bill. Unlike assessed values, Mello-Roos charges are generally set by the CFD's formation documents and aren't subject to the assessed-value appeal process. You can challenge them in court if there's a legal error, but informal appeals through the Assessor's office don't apply.

Sources

1. California State Board of Equalization, Proposition 13 Overview: Prop 13 caps assessed value at purchase price and limits annual increases to the lesser of 2% or the California CPI.
2. San Diego County Auditor and Controller, Tax Rate Areas: The San Diego County Auditor and Controller publishes annual tax rates by tax rate area (TRA).
3. San Diego County Treasurer-Tax Collector, Property Tax Due Dates: First installment due November 1, delinquent December 10; second installment due February 1, delinquent April 10, both with 10% penalty.
4. California Debt and Investment Advisory Commission, Mello-Roos Community Facilities Districts: Mello-Roos CFD charges are levied on top of the Prop 13 base rate and can materially raise effective property tax rates in newer subdivisions.
5. California State Board of Equalization, Proposition 19 Information: Proposition 19, effective February 16 2021, narrowed parent-child transfer exclusions and expanded senior base year value transfer rights to all California counties up to three times.
6. California Revenue and Taxation Code, Sections 1601–1641 (Assessment Appeals): Revenue and Taxation Code Section 1603 sets the November 30 filing deadline for assessment appeals; Section 1601 establishes the Assessment Appeals Board.
7. California State Board of Equalization, Form BOE-305-AH Application for Changed Assessment: BOE-305-AH is the official form used to file an assessment appeal with any California county Assessment Appeals Board.
8. San Diego County Assessor/Recorder/County Clerk, Supplemental Assessments: Supplemental assessments must be appealed within 60 days of the mailing date on the notice, separately from the November 30 regular appeal deadline.
9. San Diego County Assessor/Recorder/County Clerk, Exemptions (Homeowners and Veterans): The Homeowners' Exemption reduces assessed value by $7,000; the Disabled Veterans' Exemption shields up to $196,262 (2024) for 100% service-connected disabled veterans.
10. California Revenue and Taxation Code Section 5096 (Refund Interest): Section 5096 sets the interest rate on property tax refunds at 3% per annum.
11. California State Board of Equalization, Assessment Appeals Manual: The Assessment Appeals Manual provides guidance for property owners and representatives on the formal appeal process statewide.
12. California Revenue and Taxation Code Section 5140 (Refund Lawsuits): Section 5140 gives property owners the right to file suit in Superior Court after exhausting the administrative appeal process.