Contra Costa County Assessor's Office

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2530 Arnold Dr
Martinez, CA 94553
+1 (925) 313-7400
http://www.contracosta.ca.gov

The Contra Costa County Assessor's Office in Martinez, CA is dedicated to valuing every parcel of real estate in the county to determine property taxes owed. Additionally, the office provides assistance to property owners with property assessment and taxation inquiries.

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Reviews

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3.04 reviews
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Shirley M. F.
8/13/2015

I've been visiting this office every year since I bought my home in 1998; customer service rendered here is so very cool yet, low key and no pressure: I'm a Military Veteran so, every year I must...

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Jose ..
11/28/2025

The county says that the offices are open from 8am to 4pm on Friday. I have been waiting and trying all day to no avail

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Amen C.
5/12/2023

No line, no fuss, no muss... plus friendly & helpful employee. Took care of business in less than 5 minutes, pleasantly surprised

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matt m.
3/29/2017

Don't call the number above. You will get a rather rude lady who tells you it's the adult protective services office.

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