Assessed value versus market value, unit by unit.

Enter an address to see how the county's assessed value compares with our market estimate.

Free lookup. No sign-up needed to see the numbers.

50 downtown Los Angeles condominium buildings, valued unit by unit. In 41.5% of those units the assessed value exceeds our market estimate; deeper red indicates a higher share.

Downtown condominium prices have fallen for two years. Assessments have not.

Under Proposition 13 an assessment is anchored to the purchase price and trended upward each year, capped at 2%. It does not follow the market down unless someone asks for a review. The gap between those two lines is the only thing this service works on.

−23.6%

Downtown Los Angeles condominium median sale price, the two years to August 2026

−3.6%

Los Angeles County condominium median over the same two years

+4.42%

2026 Los Angeles County assessment roll, net taxable value, year over year

Sources: Redfin, Los Angeles County and Downtown Los Angeles, data through August 2026; Los Angeles County, July 14, 2026. Full market note →

How a reduction works →

Every unit valued individually

Across 13,674 buildings, one unit at a time. The figures below are our central estimate and not a predicted outcome — the only binding number is the corrected bill issued by the county.

90,563

units valued to date

14,390

carried above our market estimate

$836

median annual tax reduction indicated for those units

Figures cover the 13,674 buildings in our search index. Scope and method →

How it works

1

Address lookup

You see the roll value, how our market estimate compares with it, and what that estimate rests on.

2

One signature

You sign once. That signature produces three authorizations and the service agreement, and the authorizations cover up to four consecutive calendar years.

3

Both filings, same day

RP-87 to the Assessor at no county charge, and AAB-100 to the Assessment Appeals Board with the county's $46 fee. Both are prepared for filing on the same day and tracked to resolution.

One limit, stated before anything else: we do not yet hold a Los Angeles County Code 2.165 Tax Agent Registration Number, and form EXM-202 states that it is not valid without one unless an exclusion under Section 2.165.010(G) applies. Until that number is in hand, we prepare the filings and you sign and submit them. What we can and cannot do right now →

Check my property

The county's review is free and open to owners directly

The county charges nothing for an RP-87 decline-in-value review. The form is public and the filing window is 7/2 – 11/30. Our fee covers the valuation, the evidence, and the accuracy of the filing.

The board may also raise an assessment

The Assessment Appeals Board may move an assessment up as well as down, though never above the Proposition 13 protected value. Where the evidence does not support a reduction, we do not file.

No provider may promise an outcome

California law prohibits any provider from representing that a filing will produce a reduction (Cal. B&P §17537.9(a)(1)). The only commitment we make is about fees: no reduction, no fee.

The two routes run in parallel. Both windows are 7/2 – 11/30 and both close on the same day; R&T §1603(a) does not require an Assessor review before an application is filed. Comparison of the two routes →

Why condominiums. Why Los Angeles County.

A narrow market is not a limitation here. It is the reason the evidence holds up.

Condominiums

A reduction is decided on comparable sales. Units in one building share that building's sales history, so the comparison stays inside the building.

Not detached houses

A house has no identical peer. Its comparison reaches across streets and leans on adjustments, and adjustments are what a hearing discounts.

Los Angeles County only

The forms, the $46 filing fee, the authorization rules and the agent registration are all specific to this county. None of it transfers.

Start with a unit address

Check my property

The search, the valuation and the signature are free, and there is nothing to pay at any of those steps. Under Cal. B&P §17537.9(c), a provider of an assessment reduction filing service may not charge, demand or collect any money before the application has actually been filed with the Assessor or with the clerk of the assessment appeals board.