Contact, Location, and Hours

Due to the Shelter in Place Order issued by the County Health Officer on April 29, 2020 all offices of the Department of Conservation and Development are closed to the public. We continue to operate nearly all of our services and programs while working remotely and supporting the County’s emergency response efforts.

Beginning May 4, 2020 when restrictions on construction are eased by the Shelter in Place Order, we will resume accepting all types of building and planning applications, issuing all types of permits and conducting inspections on all types of construction. However, our process has changed and is now mostly electronic.  Please find additional information on how to apply for and receive permits here.  Please do not travel to our offices for advice or information as all our buildings and permit centers are not open.  We are able to assist you by phone and through electronic communication. 

For additional information on how the Shelter in Place has affected our programs and services in the areas of Policy Planning and Housing and Community Improvement please click here.
For updated information from the County 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 - Permanently Closed


1120 2nd Street
Suite 102
Brentwood, CA 94513

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