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ADU Builders & Contractors in Whittier, CA

Whittier, CA homeowners looking to build an ADU have 300 licensed contractors to choose from, ready to help. Whether you're planning a garage conversion, detached ADU, or junior ADU, finding the right contractor in Whittier starts here.

📊 ADU Quick Facts for Whittier

Avg. Cost/sqft

$197-$372

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 300 ADU Contractors in Whittier

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#1FOLGER CONSTRUCTION

Whittier, CA

Folger Construction — licensed ADU contractor in Whittier, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (626) 664 7326
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#2LAWRENCE CONSTRUCTION

Whittier, CA

Lawrence Construction — licensed ADU contractor in Whittier, CA. Detached ADU construction.

View Profile📞 (562) 360 4889
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#3INNOVATIVE PLAYGROUNDS COMPANY INC

Whittier, CA

Innovative Playgrounds Company Inc — licensed ADU contractor in Whittier, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (562) 693 5200
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#4MASTER CRAFT CONSTRUCTION

Whittier, CA

Master Craft Construction — licensed ADU contractor in Whittier, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (562) 556 3157
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#5CORE P & C

Whittier, CA

Core P & C — licensed ADU contractor in Whittier, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (213) 999 1110
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#6JOYLAND CONSTRUCTION INC

Whittier, CA

Joyland Construction Inc — licensed ADU contractor in Whittier, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (949) 231 7015
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#7O'CONNOR GROUP THE

Whittier, CA

O'Connor Group The — licensed ADU contractor in Whittier, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (213) 494 6564
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#8VABCO CONSTRUCTION

Whittier, CA

Vabco Construction — licensed ADU contractor in Whittier, CA. Detached ADU construction. 36+ years experience.

View Profile📞 (562) 714 3598
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#9LONGORIA CONSTRUCTION

Whittier, CA

Longoria Construction — licensed ADU contractor in Whittier, CA. Detached ADU construction. 5+ years experience.

View Profile📞 (562) 639 8602
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#10MIRONOWSKI PETER

Whittier, CA

Mironowski Peter — licensed ADU contractor in Whittier, CA. Detached ADU construction. 49+ years experience.

View Profile📞 (626) 333 0705
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💰 How Much Does an ADU Cost in Whittier?

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

$1,104 - $5,104

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Whittier

How much does it cost to build an ADU in Whittier?▼
The average cost to build an ADU in Whittier 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 Whittier?▼
The ADU permit process in Whittier 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 Whittier?▼
In Whittier, 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 Whittier?▼
Whittier 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 Whittier?▼
No parking is required for ADUs in Whittier 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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