ADU permit process in Martinez, California
Contra Costa County, California
Prepared by GetYourPermit editorial teamReport an error
We haven’t written Martinez’s permit guide yet.
We publish permit process guides one city at a time, and we would rather publish nothing than guess at Martinez’s rules using another city’s process. Permit steps, submittal requirements, and review timelines are set locally, so a guide copied from a neighboring city would be wrong in ways that cost you time.
Here is what is useful for Martinez right now.
See the fee estimate for MartinezStart here instead — official and primary sources for Martinez
The live City ADU page gives current City impact-fee and district-threshold rules and directs applicants to current City fee consultation.
Accessed August 28, 2026
- CityPermit Center
The live Permit Center says plan-check and permit fees are determined at application and links a fee schedule that is dated 2024.
Accessed August 28, 2026
What to ask the Martinez building department
- The current building permit fee schedule, and the date it took effect.
- Whether development impact fees apply at your square footage — many California cities waive them for ADUs of 750 sq ft or less.
- Plan submittal requirements: what drawings they expect, in what format, and whether submittal is online or in person.