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ADU Builders in La Mesa, CA

41 builders · ranked by Google rating and review volume · 17 CSLB license verified

★ Featured ADU builder

Featured ADU builder — this spot is open

Put your ADU company at the top of this page, in front of La Mesa homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.

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Located in San Diego County, La Mesa had a 2020 Census population of about 61,121. We found 41 ADU builders and contractors that show up for La Mesa homeowners on Google Maps, 8 of them based in the city itself. Their average Google rating is 4.7 stars. 11 market themselves specifically as ADU builders. 17 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are O.R. Renovations Inc., Coast Design & Build - Kitchen & Bath Remodel San diego and San Diego ADU Solutions.

San Diego was an early ADU adopter. Coastal-zone lots may need a coastal development permit, which state law now requires within 60 days, and transit-area lots often qualify for the 18-foot detached height allowance.

#6

G & Sons Construction

5.0 (22 Google reviews)
✔ CSLB License Verified #1098792

Service-area business · La Mesa

Serves La Mesa · based in La Mesa
Remodels & additionsHome builderGeneral contractor
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#16

Forge & Stone

5.0 (8 Google reviews)

Service-area business · El Cajon

Serves La Mesa · based in El Cajon
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#18

HSP ADU Builders

4.9 (11 Google reviews)

5975 Redwood St, San Diego, CA 92105

Serves La Mesa · based in San Diego
ADU specialistRemodels & additionsHome builderGeneral contractor
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#24

Home Services Plus

4.7 (21 Google reviews)
✔ CSLB License Verified #1119646

6431 Wandermere Dr, San Diego, CA 92120

Serves La Mesa · based in San Diego
Remodels & additionsHome builderGeneral contractor
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#25

Apex Works

5.0 (3 Google reviews)

Service-area business · Lemon Grove

Serves La Mesa · based in Lemon Grove
Remodels & additionsHome builderGeneral contractor
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#28

EMS Restoration

4.7 (12 Google reviews)
✔ CSLB License Verified #1081134

5345 Timken St Ste C, La Mesa, CA 91942

Based in La Mesa
Remodels & additionsGeneral contractor
CallWebsiteView profile
#35

TrueBuild ADU

3.0 (2 Google reviews)
✔ CSLB License Verified #770286

4901 70th St Ste 2, San Diego, CA 92115

Serves La Mesa · based in San Diego
ADU specialistHome builderGeneral contractor
CallWebsiteView profile
#38

R Neder Construction

2.3 (3 Google reviews)
✔ CSLB License Verified #929258

1890 N Marshall Ave Ste 102, El Cajon, CA 92020

Serves La Mesa · based in El Cajon
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Permits and pre-approved plans in La Mesa

ADU permits in La Mesa go through the city's building or planning department. Under AB 1332, every California city and county had to set up a pre-approved ADU plan program by January 1, 2025, so ask La Mesa whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in La Mesa? Start here

How to Legalize an Unpermitted ADU in California (AB 2533)The ADU Permit Process in California: Step by Step (2026)Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignHow to Choose an ADU Builder in Southern California: 15-Point Checklist

All ADU guides →

La Mesa ADU FAQ

How many ADU builders serve La Mesa?

Our directory lists 41 ADU builders and contractors that appear for La Mesa on Google Maps, including companies based in nearby San Diego County communities.

Do I need a permit to build an ADU in La Mesa?

Yes. ADUs need a building permit from the City of La Mesa, which must approve or deny a complete application within 60 days under state law. Many cities also offer pre-approved plans that speed up review.

How much does an ADU cost in La Mesa?

Most Southern California detached ADUs land around $350 to $550 per square foot all-in, garage conversions around $200 to $350, and JADUs around $50,000 to $150,000. Use our ADU cost estimator and get three itemized bids.

How are La Mesa ADU builders ranked here?

By Google rating weighted by the number of reviews, so a 4.9 with 200 reviews ranks above a 5.0 with 3. Featured placements are clearly labeled and don't affect the organic ranking.

Nearby cities in San Diego County

San Diego 120Chula Vista 86Oceanside 56Escondido 110Carlsbad 67El Cajon 22Vista 60San Marcos 66Encinitas 64Santee 67National City 99Poway 49
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