What is the maximum ADU size allowed in Monrovia?

Detached ADUs in Monrovia can be up to 1200 square feet.

ADU Builders & Contractors in Monrovia, CA

Q: How much does it cost to build an ADU in Monrovia?

The average cost ranges from $157,000 to $332,000, or $207-382 per square foot.

Q: How long does it take to get an ADU permit in Monrovia?

The permit process typically takes 60 to 120 weeks in Monrovia.

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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#1DREAMS BUILT TRUE INC

Monrovia, CA

Dreams Built True Inc — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 13+ years experience.

View Profile 📞 (626) 446 1484

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#2NGUYEN SON MINH

Monrovia, CA

Nguyen Son Minh — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 19+ years experience.

View Profile 📞 (626) 701 6005

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#3HIGHLAND PROPERTY CONSTRUCTION

Monrovia, CA

Highland Property Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 21+ years experience.

View Profile 📞 (626) 988 4315

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#4RAPID RHINO PLUMBING

Monrovia, CA

Rapid Rhino Plumbing — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 8+ years experience.

View Profile 📞 (626) 524 4255

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#5COOKE R CONSTRUCTION INC

Monrovia, CA

Cooke R Construction Inc — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 50+ years experience.

View Profile 📞 (626) 372 5515

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#6PCI BUILDERS

Monrovia, CA

Pci Builders — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 16+ years experience.

View Profile 📞 (626) 386 3406

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#7MANA

Monrovia, CA

Mana — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 22+ years experience.

View Profile 📞 (818) 438 5259

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#8JOHNSON JASON CONSTRUCTION

Monrovia, CA

Johnson Jason Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 27+ years experience.

View Profile 📞 (626) 840 1591

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#9CZAR HOME THEATER CONSTRUCTION

Monrovia, CA

Czar Home Theater Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 13+ years experience.

View Profile 📞 (626) 471 3543

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#10EDWARDS JIM CONSTRUCTION

Monrovia, CA

Edwards Jim Construction — licensed ADU contractor in Monrovia, CA. Detached ADU construction. 25+ years experience.

View Profile 📞 (626) 705 4120

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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