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ADU Builders & Contractors in Acton, CA

With 69 verified ADU contractors serving Acton, CA, homeowners have plenty of options for their accessory dwelling unit project. Local contractors ready to help specialize in everything from design-build to permit navigation.

📊 ADU Quick Facts for Acton

Avg. Cost/sqft

$195-$370

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 69 ADU Contractors in Acton

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#1BOWERS RILEY W

Acton, CA

Bowers Riley W — licensed ADU contractor in Acton, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (661) 674 7852
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#2STORMWATER ENTERPRISES

Acton, CA

Stormwater Enterprises — licensed ADU contractor in Acton, CA. Detached ADU construction. 46+ years experience.

View Profile📞 (818) 802 9040
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#3SKR CONSTRUCTION

Acton, CA

Skr Construction — licensed ADU contractor in Acton, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (310) 386 9640
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#4ADNA INC

Acton, CA

Adna Inc — licensed ADU contractor in Acton, CA. Detached ADU construction.

View Profile📞 (661) 903 2521
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#5HIESL CONSTRUCTION INC

Acton, CA

Hiesl Construction Inc — licensed ADU contractor in Acton, CA. Detached ADU construction. 37+ years experience.

View Profile📞 (661) 269 1660
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#6OLSEN CUSTOM BUILDING

Acton, CA

Olsen Custom Building — licensed ADU contractor in Acton, CA. Detached ADU construction. 35+ years experience.

View Profile📞 (805) 432 0471
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#7RAMIREZ RICKY

Acton, CA

Ramirez Ricky — licensed ADU contractor in Acton, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (310) 701 7881
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#8RIGHTWAY BUILDERS CHIMNEY SAVIORS INC

Acton, CA

Rightway Builders Chimney Saviors Inc — licensed ADU contractor in Acton, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (818) 618 0678
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#9FETTINGER FAMILY CONSTRUCTION

Acton, CA

Fettinger Family Construction — licensed ADU contractor in Acton, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (805) 630 0362
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#10PIERSON CONSULTING & CONSTRUCTION

Acton, CA

Pierson Consulting & Construction — licensed ADU contractor in Acton, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (818) 402 4938
View All 69 Contractors →

💰 How Much Does an ADU Cost in Acton?

Garage Conversion

$67,500 - $127,500

Converting existing garage to living space

Detached ADU

$145,000 - $320,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,099 - $5,099

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Acton

How much does it cost to build an ADU in Acton?▼
The average cost to build an ADU in Acton ranges from $145,000 to $320,000, or approximately $195 to $370 per square foot. Garage conversions typically cost $67,500 to $127,500.
How long does it take to get an ADU permit in Acton?▼
The ADU permit process in Acton 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 Acton?▼
In Acton, 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 Acton?▼
Acton 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 Acton?▼
No parking is required for ADUs in Acton 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

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