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ADU Builders & Contractors in Rosemead, CA

Rosemead, CA homeowners looking to build an ADU have 126 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 Rosemead starts here.

📊 ADU Quick Facts for Rosemead

Avg. Cost/sqft

$192-$367

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 126 ADU Contractors in Rosemead

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#1J R SPECIALTIES

Rosemead, CA

J R Specialties — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (626) 274 6715
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#2WINSING DEVELOPMENT & CONSTRUCTION

Rosemead, CA

Winsing Development & Construction — licensed ADU contractor in Rosemead, CA. Detached ADU construction.

View Profile📞 (626) 366 9681
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#3H B V CONSTRUCTION

Rosemead, CA

H B V Construction — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (626) 248 6777
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#4ANTONIO THE DRAIN SPECIALIST

Rosemead, CA

Antonio The Drain Specialist — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 31+ years experience.

View Profile📞 (626) 464 4954
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#5MR ATTIC

Rosemead, CA

MR Attic — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (925) 323 9359
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#6R E T CONSTRUCTION CORP

Rosemead, CA

R E T Construction Corp — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (626) 679 4013
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#7BUILDING BUDDY CONSTRUCTION INC

Rosemead, CA

Building Buddy Construction Inc — licensed ADU contractor in Rosemead, CA. Detached ADU construction.

View Profile📞 (626) 348 6317
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#8MARVISTA CONST CO

Rosemead, CA

Marvista Const CO — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 44+ years experience.

View Profile📞 (626) 806 8105
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#9WONG DANNY K

Rosemead, CA

Wong Danny K — licensed ADU contractor in Rosemead, CA. Detached ADU construction. 22+ years experience.

View Profile📞 (626) 315 3818
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#10ZHONG QUAN TENG

Rosemead, CA

Zhong Quan Teng — licensed ADU contractor in Rosemead, CA. Detached ADU construction.

View Profile📞 (626) 500 7986
View All 126 Contractors →

💰 How Much Does an ADU Cost in Rosemead?

Garage Conversion

$66,000 - $126,000

Converting existing garage to living space

Detached ADU

$142,000 - $317,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,111 - $5,111

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Rosemead

How much does it cost to build an ADU in Rosemead?▼
The average cost to build an ADU in Rosemead ranges from $142,000 to $317,000, or approximately $192 to $367 per square foot. Garage conversions typically cost $66,000 to $126,000.
How long does it take to get an ADU permit in Rosemead?▼
The ADU permit process in Rosemead 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 Rosemead?▼
In Rosemead, 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 Rosemead?▼
Rosemead 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 Rosemead?▼
No parking is required for ADUs in Rosemead 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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