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ADU Builders & Contractors in Wilton, CA

With 49 verified ADU contractors serving Wilton, 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 Wilton

Avg. Cost/sqft

$197-$372

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 49 ADU Contractors in Wilton

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#13 POINT REAL ESTATE & CONSTRUCTION INC

Wilton, CA

3 Point Real Estate & Construction Inc — licensed ADU contractor in Wilton, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (916) 712 1759
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#2R G G C INC

Wilton, CA

R G G C Inc — licensed ADU contractor in Wilton, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (916) 687 8088
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#3STEPHENSON JACK GENERAL BUILDING CONTRACTOR

Wilton, CA

Stephenson Jack General Building Contractor — licensed ADU contractor in Wilton, CA. Detached ADU construction. 49+ years experience.

View Profile📞 (916) 718 1000
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#4LEGACY FIRE PROTECTION INC

Wilton, CA

Legacy Fire Protection Inc — licensed ADU contractor in Wilton, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (916) 612 3056
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#5ABSOLUTE PRECISION CONSTRUCTION

Wilton, CA

Absolute Precision Construction — licensed ADU contractor in Wilton, CA. Detached ADU construction. 5+ years experience.

View Profile📞 (916) 281 4583
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#6MC LEOD CONSTRUCTION

Wilton, CA

MC Leod Construction — licensed ADU contractor in Wilton, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (916) 753 7367
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#7GUERRERO RICKY

Wilton, CA

Guerrero Ricky — licensed ADU contractor in Wilton, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (916) 410 6865
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#8P&P CALVA CONSTRUCTION

Wilton, CA

P&P Calva Construction — licensed ADU contractor in Wilton, CA. Detached ADU construction.

View Profile📞 (213) 550 6622
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#9HAGERMAN CONSTRUCTION

Wilton, CA

Hagerman Construction — licensed ADU contractor in Wilton, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (916) 997 5147
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#10TOMMY LANE PAINTING

Wilton, CA

Tommy Lane Painting — licensed ADU contractor in Wilton, CA. Detached ADU construction. 23+ years experience.

View Profile📞 (916) 955 2728
View All 49 Contractors →

💰 How Much Does an ADU Cost in Wilton?

Garage Conversion

$68,500 - $128,500

Converting existing garage to living space

Detached ADU

$147,000 - $322,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,105 - $5,105

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Wilton

How much does it cost to build an ADU in Wilton?▼
The average cost to build an ADU in Wilton ranges from $147,000 to $322,000, or approximately $197 to $372 per square foot. Garage conversions typically cost $68,500 to $128,500.
How long does it take to get an ADU permit in Wilton?▼
The ADU permit process in Wilton 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 Wilton?▼
In Wilton, 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 Wilton?▼
Wilton 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 Wilton?▼
No parking is required for ADUs in Wilton 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.

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