Santa Monica, CA: Property Tax Guide

Santa Monica's Actual Effective Rate and Median Bill

Per Ownwell's published Los Angeles County property tax data, Santa Monica carries a median effective property tax rate of approximately 1.23% of assessed value -- above the U.S. national median (roughly 1.02%). The median annual property tax bill citywide is cited around $11,400-$11,500, though a separate figure from the same general dataset cited an average homeowner bill closer to $14,617 against a county average of $6,901, illustrating how much the specific sample and methodology can move the headline number even within the same source family. What's more useful than any single citywide figure is the ZIP-code range: one Ownwell breakdown put the median bill as low as roughly $8,496 in the 90404 ZIP (covering parts of the Pico neighborhood and areas near Santa Monica College) and as high as roughly $23,146 in the 90402 ZIP (the North of Montana area) -- nearly a threefold difference within one small city, driven almost entirely by the underlying gap in assessed home values between neighborhoods.

That range is the real lesson here: Santa Monica's percentage rate doesn't vary dramatically block to block, but the dollar bill absolutely does, because it's the rate applied against wildly different assessed values across the city's roughly 8.3 square miles. A buyer should treat the citywide median as a rough floor, not a representative figure for any specific neighborhood, and should budget using the assessed value their own purchase price will generate -- not a citywide or even ZIP-level average.

Why Your Bill Won't Match the Seller's: Prop 13 Resets at Sale

California's Proposition 13 (1978) sets a property's "base year value" at its purchase price (or new-construction value) at the time of the triggering event, and caps subsequent annual increases in assessed value at up to 2% regardless of how much the property's actual market value rises. In a market where citywide and neighborhood prices have appreciated as much as Santa Monica's has over recent decades, this creates a genuinely large gap between a long-tenured owner's current tax bill and what a new buyer should expect. A North of Montana home purchased in the 1990s can carry an assessed value a small fraction of its current market value; the buyer who purchases that same home today gets reassessed at the new sale price and starts the same 2%-cap growth clock over from a much higher base.

Do not use a listing's currently displayed property tax amount as a projection of your own bill. Assume reassessment at your actual purchase price, run the roughly 1.2%-plus effective-rate range described above against that number as a starting estimate, and confirm the exact resulting figure with the LA County Assessor before closing.

The 1% Base Plus Local Add-Ons, and the LA County Assessor's Role

Prop 13 caps the general property tax rate at 1% of assessed value at the state constitutional level; in practice, the total rate on most California parcels, Santa Monica included, runs above a flat 1% because of voter-approved local add-ons layered on top -- city and county bond measures, Santa Monica-Malibu Unified School District bonds and parcel taxes, community college district measures (Santa Monica College is its own community college district), and county-level infrastructure or library assessments. Santa Monica's own roughly 1.2%+ median effective rate already reflects that layering in aggregate; which specific add-on levies apply to any one parcel depends on its exact location.

The Los Angeles County Assessor's office -- not the City of Santa Monica -- determines assessed values, processes base-year-value transfers, and administers exemptions under state law; the LA County Treasurer and Tax Collector bills and collects the tax once the Assessor sets the value. For anything specific to an individual property -- current assessed value, exact parcel-level rate breakdown, exemption applications, or reassessment appeals -- start with the County Assessor directly.

Measure GS: Santa Monica's Own Real Property Transfer Tax

Separate from annual property tax, Santa Monica voters approved Measure GS, a city-specific real property transfer tax, effective March 1, 2023 with no stated end date. It applies a tiered rate on the gross sale value at time of transfer: $3.00 per $1,000 (0.3%) for sales under $5,000,000 -- the city's pre-existing flat rate, essentially unchanged for lower-value transactions -- $6.00 per $1,000 (0.6%) for sales between $5,000,000 and $7,999,999, and $56.00 per $1,000 (5.6%) for sales of $8,000,000 or more. Combined with Los Angeles County's own separate documentary transfer tax of $1.10 per $1,000, the effective combined rate at the top tier works out to roughly 5.71% -- the figure most commonly cited in coverage of the measure.

This is genuinely and completely separate from the City of Los Angeles's Measure ULA (the widely reported "mansion tax," a 4%/5.5% tiered tax on sales above roughly $5.4 million/$10.9 million as periodically inflation-adjusted, effective April 2023). Measure ULA applies only within LA city limits and does not reach Santa Monica; Measure GS applies only within Santa Monica's city limits and does not reach LA. Confusing the two -- assuming a Santa Monica sale is subject to ULA's rates and thresholds, or vice versa -- is a real, documented, common mistake in casual coverage of both measures. Confirm which measure (if either) applies, and the exact resulting tax, with a title company or real estate attorney handling the specific closing.

What Proposition 19 Changed: Family Transfers and Senior Portability

Proposition 19 (approved by California voters in 2020, effective in phases from 2021) replaced the state's older parent-child/grandparent-grandchild transfer rules and prior senior base-year-value portability rules (formerly Propositions 60, 90, and 110) with a narrower framework: the parent-child exclusion generally now requires the child to use an inherited home as their own primary residence, with additional value-cap conditions, rather than allowing any use of the property to carry forward the parent's low assessed value. On the portability side, Prop 19 expanded the ability of homeowners 55 or older, severely disabled, or disaster victims to transfer their existing base-year value to a replacement home -- up to three times for age/disability-based moves, anywhere in California.

Given Santa Monica's substantial population of longtime owners and retirees (this site's dedicated retirement page covers the demographic detail), Prop 19 portability is a genuinely relevant tool for someone selling a long-held primary residence elsewhere in California and buying in Santa Monica, potentially carrying a lower assessed value forward rather than starting at full market value. Confirm current eligibility mechanics directly with the LA County Assessor or a California tax professional before assuming portability applies to a specific move.

What This Page Does Not Claim

This page states real, sourced figures -- a roughly 1.23% median effective rate, a roughly $11,400-$11,500 median bill, and Measure GS's exact published tier structure -- because publishing an honest, source-derived estimate is more useful to a buyer than refusing to give any number at all. What it does not claim is the specific combined rate or dollar bill for any individual parcel: Santa Monica's actual combined rate varies meaningfully by which school and special-assessment districts apply, and any specific property's post-sale reassessed value depends on its actual purchase price, not a citywide or ZIP-level median. Third-party estimator tools (Ownwell included) are useful directional data, not a substitute for a parcel-specific lookup through the County Assessor's own records or a title company's tax certificate before closing.