In Acton, property tax follows California's Proposition 13: about 1% of assessed value plus local voter-approved bonds, for a typical effective rate near 1.1%-1.25%. Newer master-planned tracts can add Mello-Roos (a CFD special tax) on top. This calculator estimates your annual and monthly property tax and shows the effective rate. Verify the exact figure for any parcel with the Los Angeles County Assessor.
How California property tax works
Proposition 13 caps the base ad valorem rate at 1% of assessed value and limits annual increases in assessed value to about 2%, with reassessment to market value generally on a change of ownership. On top of the 1% base, Acton parcels carry voter-approved bond measures and direct assessments, which is why the effective rate usually lands a little above 1%.
Mello-Roos in Acton
Acton is rural and large-lot; most properties do not carry Mello-Roos. Verify any specific parcel. A Mello-Roos CFD is a separate special tax that funds infrastructure in newer developments and is added to your base bill - it can add hundreds of dollars a month, so always confirm it before writing an offer.
Estimate your property tax
Estimate only. Verify the exact rate, bonds, and any CFD for a specific parcel with the county assessor.
Worked example for Acton
On an assessed value of $850,000 — Acton's ZIP 93510 June 2026 median sold price per the Chicago Title Market Trend Report (June 2026 full-value sales, compiled from MLS and public recorded data), pulled 2026-08-15 (6 sales, a ZIP-level figure rather than a citywide median) — at 1.15%, the base property tax is about $9,775/yr (~$815/mo). Add any Mello-Roos to get the all-in figure.
Frequently Asked Questions
What is the property tax rate in Acton?
Base property tax follows Proposition 13 - about 1% of assessed value plus local voter-approved bonds, for a typical effective rate near 1.1%-1.25%. Newer tracts may add Mello-Roos. Verify the parcel with the county assessor.
Does Acton have Mello-Roos?
It depends on the tract. Acton is rural and large-lot; most properties do not carry Mello-Roos. Verify any specific parcel. Always confirm the CFD on the exact parcel.
How is my assessed value set in California?
Generally at your purchase price at change of ownership, then increased at most about 2% per year under Proposition 13. Certain transfers qualify for exclusions - ask a tax professional.
Is Mello-Roos tax-deductible?
Mello-Roos is generally a special assessment, and its deductibility differs from standard ad valorem property tax. Consult a CPA about your specific situation.
