Contact, Location, and Hours

Due to the Order issued by the County Health Officer on March 16, 2020 (and the subsequent Order issued on March 31, 2020), all offices of the Department of Conservation and Development are closed to the public until further notice.

We continue to process certain applications and permits, and to perform construction inspections for certain projects, but only as consistent with the requirements of Health Officer’s Order. We are striving to continue to operate our other programs and services to the extent possible by working remotely and while supporting the County’s emergency response efforts, but please be patient with us given the extreme limitations this presents.

Please call (925) 674-7200 with questions, to schedule an inspection for an active building permit, or to discuss procedures for submitting new applications.

For additional information on our current operations please click here.
For updated information about COVID-19, please visit

Main Office


30 Muir Road
Martinez, CA 94553
Map to Martinez Office


Main Phone: 925-674-7774
Application and Permit Center: 925-674-7200
Contact Us - Online Form


Monday - Thursday, 7:30 a.m. to 5:00 p.m.
Friday, 7:30 a.m. to 4:00 p.m.

Services Offered:

Brentwood Office


1120 2nd Street
Suite 102
Brentwood, CA 94513
Map to Brentwood Office


Phone: 925-427-8850
Fax: 925-427-8838
Email East County office


Monday - Thursday, 8:00 a.m. to 12:00 p.m.
Friday - Closed

Services offered:

  • Code Enforcement inspections
  • Issuance of miscellaneous/minor permits
  • Takes in plans for plan review
  • Planning Review / Consultation

Lamorinda Office


3685 Mt Diablo Boulevard
Suite 120
Lafayette, CA 94549
Map to Lafayette Office


Phone: 925-299-0263
Fax: 925-299-0134
Email Lamorinda Office


Monday - Thursday, 8:00 a.m. to 11:30 a.m. and 12:30 p.m. to 5:00 p.m.
Friday, 8:00 am to 11:30 a.m. and 12:30 p.m. to 4:00 p.m.

Services offered

  • Structural Engineer
  • Plan Checkers
  • Building Permit Issuance

Review the Planning and Building permit guidelines for your construction project within the following cities:

City of Clayton

6000 Heritage Trail
Clayton, CA 94517
Phone: 925-673-7300
City of Clayton Planning Website

City of Hercules

111 Civic Drive
Hercules, CA 94547
Phone: 510-799-8251
Fax: 510-799-8249
City of Hercules Planning Website

City of Lafayette

3675 Mount Diablo Boulevard Ste. 210
Lafayette, CA 94549
Phone: 925-284-1976
Fax: 925-284-1122
City of Lafayette Planning Website

Town of Moraga

329 Rheem Boulevard
Moraga, CA 94556
Phone: 925-888-7040
Fax: 925-376-5203
Town of Moraga Website

City of Orinda

22 Orinda Way
Orinda, CA 94563
Phone: 925-253-4210
Fax: 925-253-7719
City of Orinda Planning Website