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ADU Builders & Contractors in Placentia, CA

With 145 verified ADU contractors serving Placentia, 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 Placentia

Avg. Cost/sqft

$190-$365

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 145 ADU Contractors in Placentia

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#1M A C CONSTRUCTION CO

Placentia, CA

M A C Construction CO — licensed ADU contractor in Placentia, CA. Detached ADU construction. 38+ years experience.

View Profile📞 (949) 312 7933
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#2SCHMIDT CHRISTOPHER

Placentia, CA

Schmidt Christopher — licensed ADU contractor in Placentia, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (626) 709 7080
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#3SIMMS ROBERT CONSTRUCTION

Placentia, CA

Simms Robert Construction — licensed ADU contractor in Placentia, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (714) 747 5964
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#4HOME REMODELING

Placentia, CA

Home Remodeling — licensed ADU contractor in Placentia, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (714) 269 7900
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#5M I R BUILDERS INC

Placentia, CA

M I R Builders Inc — licensed ADU contractor in Placentia, CA. Detached ADU construction.

View Profile📞 (714) 600 6544
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#6ROMERO RAUL

Placentia, CA

Romero Raul — licensed ADU contractor in Placentia, CA. Detached ADU construction. 49+ years experience.

View Profile📞 (714) 290 6833
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#7CJR BUILDERS INC

Placentia, CA

Cjr Builders Inc — licensed ADU contractor in Placentia, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (714) 572 2600
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#8J G DECOR

Placentia, CA

J G Decor — licensed ADU contractor in Placentia, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (714) 402 2696
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#9BLUE WATT CONSTRUCTION

Placentia, CA

Blue Watt Construction — licensed ADU contractor in Placentia, CA. Detached ADU construction.

View Profile📞 (714) 981 1150
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#10JASE CONSTRUCTION INC

Placentia, CA

Jase Construction Inc — licensed ADU contractor in Placentia, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 366 6203
View All 145 Contractors →

💰 How Much Does an ADU Cost in Placentia?

Garage Conversion

$65,000 - $125,000

Converting existing garage to living space

Detached ADU

$140,000 - $315,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,108 - $5,108

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Placentia

How much does it cost to build an ADU in Placentia?▼
The average cost to build an ADU in Placentia ranges from $140,000 to $315,000, or approximately $190 to $365 per square foot. Garage conversions typically cost $65,000 to $125,000.
How long does it take to get an ADU permit in Placentia?▼
The ADU permit process in Placentia 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 Placentia?▼
In Placentia, 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 Placentia?▼
Placentia 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 Placentia?▼
No parking is required for ADUs in Placentia 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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