What is the maximum ADU size allowed in San Dimas?

Detached ADUs in San Dimas can be up to 1200 square feet.

ADU Builders & Contractors in San Dimas, CA

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

The average cost ranges from $143,000 to $318,000, or $193-368 per square foot.

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

The permit process typically takes 60 to 120 weeks in San Dimas.

San Dimas, CA homeowners looking to build an ADU have 129 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 San Dimas starts here.

📊 ADU Quick Facts for San Dimas

Avg. Cost/sqft

$193-$368

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 129 ADU Contractors in San Dimas

🏗️

#1LOTZORE LLC

San Dimas, CA

Lotzore Llc — licensed ADU contractor in San Dimas, CA. Detached ADU construction.

View Profile 📞 (310) 504 4800

🏗️

#2P C S PFONNER CONSTRUCTION SERVICE

San Dimas, CA

P C S Pfonner Construction Service — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 20+ years experience.

View Profile 📞 (909) 720 2914

🏗️

#3CORONA CONSTRUCTION COMPANY

San Dimas, CA

Corona Construction Company — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 24+ years experience.

View Profile 📞 (626) 926 7487

🏗️

#4MANCHESTER CONSTRUCTION

San Dimas, CA

Manchester Construction — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 12+ years experience.

View Profile 📞 (760) 449 1231

🏗️

#5AMG BUILDERS INC

San Dimas, CA

Amg Builders Inc — licensed ADU contractor in San Dimas, CA. Detached ADU construction.

View Profile 📞 (626) 656 0353

🏗️

#6SIPP RYAN

San Dimas, CA

Sipp Ryan — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 38+ years experience.

View Profile 📞 (909) 224 2188

🏗️

#7WEIR DANIEL CONSTRUCTION COMPANY

San Dimas, CA

Weir Daniel Construction Company — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 46+ years experience.

View Profile 📞 (626) 826 3626

🏗️

#8HABITANT CLASSIQUE INC

San Dimas, CA

Habitant Classique Inc — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 15+ years experience.

View Profile 📞 (626) 380 8028

🏗️

#9BT CONSTRUCTION

San Dimas, CA

BT Construction — licensed ADU contractor in San Dimas, CA. Detached ADU construction.

View Profile 📞 (909) 525 2821

🏗️

#10S S SALAZAR BUILDERS INC

San Dimas, CA

S S Salazar Builders Inc — licensed ADU contractor in San Dimas, CA. Detached ADU construction. 13+ years experience.

View Profile 📞 (323) 717 7430

View All 129 Contractors →

💰 How Much Does an ADU Cost in San Dimas?

Garage Conversion

$66,500 - $126,500

Converting existing garage to living space

Detached ADU

$143,000 - $318,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,097 - $5,097

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in San Dimas

How much does it cost to build an ADU in San Dimas?▼

The average cost to build an ADU in San Dimas ranges from $143,000 to $318,000, or approximately $193 to $368 per square foot. Garage conversions typically cost $66,500 to $126,500.

How long does it take to get an ADU permit in San Dimas?▼

The ADU permit process in San Dimas 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 San Dimas?▼

In San Dimas, 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 San Dimas?▼

San Dimas 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 San Dimas?▼

No parking is required for ADUs in San Dimas 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

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

Ready to Build Your ADU in San Dimas?

Get free quotes from top-rated local contractors

Find Contractors Now

← View all contractors in California