What is the maximum ADU size allowed in Los Alamitos?

Detached ADUs in Los Alamitos can be up to 1200 square feet.

ADU Builders & Contractors in Los Alamitos, CA

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

The average cost ranges from $156,000 to $331,000, or $206-381 per square foot.

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

The permit process typically takes 60 to 120 weeks in Los Alamitos.

Los Alamitos, CA homeowners looking to build an ADU have 98 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 Los Alamitos starts here.

📊 ADU Quick Facts for Los Alamitos

Avg. Cost/sqft

$206-$381

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 98 ADU Contractors in Los Alamitos

🏗️

#1SEVERSON CLARK C

Los Alamitos, CA

Severson Clark C — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction.

View Profile 📞 (562) 493 3611

🏗️

#2UNITED BUILDERS & CO LLC

Los Alamitos, CA

United Builders & CO Llc — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction.

View Profile 📞 (562) 542 1272

🏗️

#3INNOV8RESTORATION INC

Los Alamitos, CA

Innov8restoration Inc — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction.

View Profile 📞 (562) 982 4001

🏗️

#4CARR CUSTOM CONSTRUCTION

Los Alamitos, CA

Carr Custom Construction — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 13+ years experience.

View Profile 📞 (562) 716 1268

🏗️

#5ADEE CONSTRUCTION

Los Alamitos, CA

Adee Construction — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 15+ years experience.

View Profile 📞 (626) 384 8881

🏗️

#6SENTENO CONSTRUCTION AND DESIGN

Los Alamitos, CA

Senteno Construction And Design — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 9+ years experience.

View Profile 📞 (714) 869 4334

🏗️

#7OKEEFFE CONSTRUCTION COMPANY

Los Alamitos, CA

Okeeffe Construction Company — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 18+ years experience.

View Profile 📞 (562) 449 5041

🏗️

#82VM SOCAL CONSTRUCTION

Los Alamitos, CA

2vm Socal Construction — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 9+ years experience.

View Profile 📞 (562) 355 0602

🏗️

#9DUKE CONSTRUCTION SERVICES INC

Los Alamitos, CA

Duke Construction Services Inc — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 7+ years experience.

View Profile 📞 (562) 706 4996

🏗️

#10ANDERSEN BRENT E

Los Alamitos, CA

Andersen Brent E — licensed ADU contractor in Los Alamitos, CA. Detached ADU construction. 19+ years experience.

View Profile 📞 (562) 500 3150

View All 98 Contractors →

💰 How Much Does an ADU Cost in Los Alamitos?

Garage Conversion

$73,000 - $133,000

Converting existing garage to living space

Detached ADU

$156,000 - $331,000

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 Los Alamitos contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Los Alamitos

How much does it cost to build an ADU in Los Alamitos?▼

The average cost to build an ADU in Los Alamitos ranges from $156,000 to $331,000, or approximately $206 to $381 per square foot. Garage conversions typically cost $73,000 to $133,000.

How long does it take to get an ADU permit in Los Alamitos?▼

The ADU permit process in Los Alamitos 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 Los Alamitos?▼

In Los Alamitos, 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 Los Alamitos?▼

Los Alamitos 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 Los Alamitos?▼

No parking is required for ADUs in Los Alamitos 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 Los Alamitos?

Get free quotes from top-rated local contractors

Find Contractors Now

← View all contractors in California