Building

***IMPORTANT NOTICE*** 

Due to the unprecedented COVID-19 situation the Building Department has updated our processes until further notice.

City Hall is shut down to the public starting December 7 – December 23.  City Hall will also be closed for furlough from December 24 – January 3.  For assistance please call or email the Building Department at building@unioncity.org or (510) 675-5313.  

General Information

Adopted Codes & General Design Information

The Building Division adheres to the following standards:

  • Volumes 1 and 2 of the 2019 California Building, Residential, Electrical, Mechanical, Plumbing, Energy, Fire and, Green Building Standards Codes
  • 1997 California Codes - Administrative, Uniform Code for Abatement of Dangerous Buildings, Uniform Housing, and Uniform Security Codes.
  • Basic Wind Speed - 85 mph
  • Building Exposure - B
  • Climate Zone - 3
  • Rainfall - 1.5 inch/hour
  • Seismic Site Class - D
  • Soil Bearing Value - 1500 (presumptive)
  • Soils Hazard Zones - East of Mission and West of Union City Boulevard
  • Wildland Urban Interface Zone - East of Mission Boulevard

Other Important Phone Numbers

  • Building and Residential Fire Sprinkler Inspection Hotline: 510-487-0711
  • Commercial Fire Alarm, Ansul System and Commercial Fire Sprinkler Inspections: 510-675-5470
  • Construction and Demolition Debris Recycling Requirements 510-675-5466