Need a home addition in San Bernardino County, CA? San Bernardino County has about 2,214,281 residents (2024 estimate) and 24 incorporated cities and towns. Describe your project once: addition contractors who work in San Bernardino County get back to you.
Building permits in San Bernardino County are issued by each city, or by the county in unincorporated areas.
Services available in San Bernardino County
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in San Bernardino County
Do addition contractors cover the whole of San Bernardino County?
Most pros work across the county and neighboring counties. Enter your ZIP code in the form and we match you with pros who serve your exact area.
Home Additions in California: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.