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ADU Builders & Contractors in San Bernardino, CA

Building an ADU in San Bernardino? You'll find 254 licensed contractors in the area, ready to help. San Bernardino's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for San Bernardino

Avg. Cost/sqft

$193-$368

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 254 ADU Contractors in San Bernardino

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#1GODDARD'S/NAZCO SERVICES

San Bernardino, CA

Goddard'S/Nazco Services — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 42+ years experience.

View Profile📞 (909) 888 5911
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#2FISCHER INC

San Bernardino, CA

Fischer Inc — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (909) 881 2910
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#3BUILDING BLOCK CONSTRUCTION

San Bernardino, CA

Building Block Construction — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (951) 376 7822
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#4M D DEVELOPMENT

San Bernardino, CA

M D Development — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (957) 255 4825
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#5CARRILLO CONSTRUCTION CO

San Bernardino, CA

Carrillo Construction CO — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 48+ years experience.

View Profile📞 (909) 880 7833
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#6PHOENIX CONSTRUCTION GROUP

San Bernardino, CA

Phoenix Construction Group — licensed ADU contractor in San Bernardino, CA. Detached ADU construction.

View Profile📞 (909) 809 0838
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#7SU LINDA CASA

San Bernardino, CA

SU Linda Casa — licensed ADU contractor in San Bernardino, CA. Detached ADU construction.

View Profile📞 (909) 660 8566
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#8HERNANDEZ JAVIER CARRILLO

San Bernardino, CA

Hernandez Javier Carrillo — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (909) 659 9305
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#9FERRER JUAN CONSTRUCTION

San Bernardino, CA

Ferrer Juan Construction — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (626) 863 4406
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#105 BROTHER'S PAINTING & GENERAL CONSTRUCTION INC

San Bernardino, CA

5 Brother'S Painting & General Construction Inc — licensed ADU contractor in San Bernardino, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (909) 648 0408
View All 254 Contractors →

💰 How Much Does an ADU Cost in San Bernardino?

Garage Conversion

$66,500 - $126,500

Converting existing garage to living space

Detached ADU

$143,000 - $318,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,097 - $5,097

Plan check, permits, utility connections

* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple San Bernardino contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in San Bernardino

How much does it cost to build an ADU in San Bernardino?▼
The average cost to build an ADU in San Bernardino ranges from $143,000 to $318,000, or approximately $193 to $368 per square foot. Garage conversions typically cost $66,500 to $126,500.
How long does it take to get an ADU permit in San Bernardino?▼
The ADU permit process in San Bernardino typically takes 60 to 120 weeks. California law requires cities to approve or deny ADU permits within 60 days of receiving a complete application.
What are the ADU size limits in San Bernardino?▼
In San Bernardino, detached ADUs can be up to 1200 square feet. Attached ADUs are limited to 50% of the primary dwelling or 1,200 sqft, whichever is less. Junior ADUs (JADUs) are limited to 500 sqft and must be within the existing home.
What is the setback requirement for ADUs in San Bernardino?▼
San Bernardino requires 4-foot setbacks from side property lines and 4-foot setbacks from rear property lines for new ADU construction. Converted structures (like existing garages) may maintain their current setbacks.
Do I need to provide parking for my ADU in San Bernardino?▼
No parking is required for ADUs in San Bernardino if your property is within half a mile of public transit, in a historic district, part of an existing multi-family building, or if the ADU is a garage conversion. Otherwise, one space may be required.

Also See ADU Contractors In

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

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