ADU Contractors
Dashboard

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

🏗️
#1SAGERS CONSTRUCTION INC

Alta Loma, CA

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

View Profile📞 (208) 541 9594
🏗️
#2IMPRESSIVE BUILDERS INC

Alta Loma, CA

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

View Profile📞 (323) 744 1577
🏗️
#3INCANTALUPO MICHAEL

Alta Loma, CA

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

View Profile📞 (909) 208 2671
🏗️
#4JOHNSON CONSTRUCTION

Alta Loma, CA

Johnson Construction — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 32+ years experience.

View Profile📞 (909) 717 7521
🏗️
#5P B M CONSTRUCTION SERVICES

Alta Loma, CA

P B M Construction Services — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (909) 489 2266
🏗️
#6BRYANT GEORGE CONSTRUCTION INC

Alta Loma, CA

Bryant George Construction Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (909) 944 3517
🏗️
#7FRONTIER BUILDERS

Alta Loma, CA

Frontier Builders — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 22+ years experience.

View Profile📞 (909) 851 1674
🏗️
#8BAKER TED CONSTRUCTION

Alta Loma, CA

Baker Ted Construction — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 26+ years experience.

View Profile📞 (951) 288 0058
🏗️
#9NEW LATTITUDES CONSTRUCTION

Alta Loma, CA

New Lattitudes Construction — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 5+ years experience.

View Profile📞 (909) 948 9848
🏗️
#10HAFNER COMPANY INC

Alta Loma, CA

Hafner Company Inc — licensed ADU contractor in Alta Loma, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (909) 917 5485
View All 98 Contractors →

💰 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)

Ready to Build Your ADU in Alta Loma?

Get free quotes from top-rated local contractors

Find Contractors Now
← View all contractors in California