Recent state and local laws have made it easier than ever to build an ADU in San Bernardino County. Here are some key highlights of San Bernardino County ADU regulations and requirements:
- ADUs allowed on single-family and multifamily residential lots
- Minimum size: 800 sq. ft. by right; many areas allow up to 1,200 sq. ft.
- Relaxed parking requirements and reduced permit fees
- Setbacks reduced to just 4’ for side and rear yards
- Pre-approved ADU plans available for faster permitting
Features & Benefits of Our San Bernardino ADUs
- Fully equipped ADUs: living room, kitchens, bedrooms, baths
- Energy-efficient, insulated construction
- Fast build times & minimal neighborhood disruption
- Optional upgrades: granite/quartz countertops, tankless water heaters, sleeping lofts, vaulted ceilings, fire sprinklers
- Compliant with state fire and safety codes
Have questions? Find answers on our ADU FAQ page.
Tiny Homes vs. ADUs in San Bernardino
A Tiny Home or Park Model can often qualify as a San Bernardino ADU—especially models built to ANSI and CBC standards, which meet local building codes. Many of our models feature lofts, porches, and customizable layouts that maximize usable space.
Browse our available models in the ADU Project Gallery.
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- Athens 516
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- Athens 516
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- Athens APS-507
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- Athens APS-507
Why Build a Prefabricated ADU in San Bernardino?
- Extend Living Space 80%
- Reduced Time to Build 60%
- Satisfaction Guaranteed! 90%
- Energy Savings 50%
- Rental Income 80%
See all our service areas on our Main Service Area page.
Ready to Start Your San Bernardino ADU Project?
Get started with a free consultation from the leading ADU builder in San Bernardino County. Contact USModular, Inc. today at info@usmodularinc.com or call 951-679-9907.
Visit Get Started with Modular Construction to fulfill your vision today!
