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ADU Builders & Contractors in Alta Loma, CA

Alta Loma, CA is home to 98 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Alta Loma's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Alta Loma

Avg. Cost/sqft

$195-$370

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 98 ADU Contractors in Alta Loma

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#1C W FRAMING INC

Alta Loma, CA

C W Framing Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 23+ years experience.

View Profile📞 (909) 989 9099
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#2ST MACARIUS BUILDERS INC

Alta Loma, CA

ST Macarius Builders Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (909) 262 1558
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#3ALL YEAR SUNRISE CONCRETE INC

Alta Loma, CA

All Year Sunrise Concrete Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (951) 275 2929
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#4GILL JOHN CONSTRUCTION

Alta Loma, CA

Gill John Construction — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (909) 260 6696
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#5WEST COAST RENOVATIONS AND IMPROVEMENTS INC

Alta Loma, CA

West Coast Renovations And Improvements Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (909) 938 0777
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#6VENABLE MIKE CONSTRUCTION

Alta Loma, CA

Venable Mike Construction — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (909) 519 2528
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#7SOUTHLAND TILE

Alta Loma, CA

Southland Tile — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 26+ years experience.

View Profile📞 (909) 821 4017
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#8SAGERS CONSTRUCTION INC

Alta Loma, CA

Sagers Construction Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction.

View Profile📞 (208) 541 9594
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#9IMPRESSIVE BUILDERS INC

Alta Loma, CA

Impressive Builders Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction.

View Profile📞 (323) 744 1577
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#10INCANTALUPO MICHAEL

Alta Loma, CA

Incantalupo Michael — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (909) 208 2671
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💰 How Much Does an ADU Cost in Alta Loma?

Garage Conversion

$67,500 - $127,500

Converting existing garage to living space

Detached ADU

$145,000 - $320,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,108 - $5,108

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Alta Loma

How much does it cost to build an ADU in Alta Loma?▼
The average cost to build an ADU in Alta Loma ranges from $145,000 to $320,000, or approximately $195 to $370 per square foot. Garage conversions typically cost $67,500 to $127,500.
How long does it take to get an ADU permit in Alta Loma?▼
The ADU permit process in Alta Loma 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 Alta Loma?▼
In Alta Loma, 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 Alta Loma?▼
Alta Loma 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 Alta Loma?▼
No parking is required for ADUs in Alta Loma 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)

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