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ADU Builders & Contractors in Monrovia, CA

Monrovia, CA is home to 132 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Monrovia's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Monrovia

Avg. Cost/sqft

$207-$382

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 132 ADU Contractors in Monrovia

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#1EXPOSITO ANTHONY

Monrovia, CA

Exposito Anthony — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (626) 840 4831
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#2JAM CORP

Monrovia, CA

Jam Corp — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 25+ years experience.

View Profile📞 (626) 256 4400
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#3R & C CONSTRUCTION INC

Monrovia, CA

R & C Construction Inc — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 25+ years experience.

View Profile📞 (626) 622 1161
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#4LARET CONSTRUCTION

Monrovia, CA

Laret Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (323) 828 2989
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#5JOHN LUITEN CONSTRUCTION

Monrovia, CA

John Luiten Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 38+ years experience.

View Profile📞 (626) 233 8909
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#6FRENCH GARY

Monrovia, CA

French Gary — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (626) 824 2925
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#7QUALITY CRAFT HOME IMPROVEMENT

Monrovia, CA

Quality Craft Home Improvement — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 35+ years experience.

View Profile📞 (626) 338 2200
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#8ICEBERG CONSTRUCTION AND REFURBISHING

Monrovia, CA

Iceberg Construction And Refurbishing — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 26+ years experience.

View Profile📞 (323) 633 7576
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#9AKK CONSTRUCTION

Monrovia, CA

Akk Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction.

View Profile📞 (626) 231 2288
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#10ALTERNATIVE FLOORS INC

Monrovia, CA

Alternative Floors Inc — licensed ADU contractor in Monrovia, CA. Detached ADU construction.

View Profile📞 (800) 660 8062
View All 132 Contractors →

💰 How Much Does an ADU Cost in Monrovia?

Garage Conversion

$73,500 - $133,500

Converting existing garage to living space

Detached ADU

$157,000 - $332,000

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 Monrovia contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Monrovia

How much does it cost to build an ADU in Monrovia?▼
The average cost to build an ADU in Monrovia ranges from $157,000 to $332,000, or approximately $207 to $382 per square foot. Garage conversions typically cost $73,500 to $133,500.
How long does it take to get an ADU permit in Monrovia?▼
The ADU permit process in Monrovia 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 Monrovia?▼
In Monrovia, 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 Monrovia?▼
Monrovia 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 Monrovia?▼
No parking is required for ADUs in Monrovia 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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