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ADU Builders in San Diego, CA

120 builders · ranked by Google rating and review volume · 44 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 San Diego 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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San Diego is home to about 1,386,932 people (2020 Census) in San Diego County. We found 120 ADU builders and contractors that show up for San Diego homeowners on Google Maps, 71 of them based in the city itself. Their average Google rating is 4.9 stars. 59 market themselves specifically as ADU builders, and 4 mention garage conversions. 44 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Lumina Builders Inc., Shiro Builders Group and Golden shore design and build.

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.

#10

Vesta Builders

5.0 (31 Google reviews)
✔ CSLB License Verified #1120772

3270 Rosecrans St, San Diego, CA 92110

Based in San Diego
Remodels & additionsGeneral contractor
CallWebsiteView profile
#14

CASITA ADU

5.0 (25 Google reviews)

Aviation Jet Complex, 2100 Palomar Airport Rd, Carlsbad, CA 92011

Serves San Diego · based in Carlsbad
ADU specialist
CallWebsiteView profile
#15

PBH Builders

4.9 (78 Google reviews)
✔ CSLB License Verified #1102758

4715 30th St, San Diego, CA 92116

Based in San Diego
Remodels & additionsHome builder
CallWebsiteView profile
#16

Apex American Homes

4.9 (76 Google reviews)
✔ CSLB License Verified #1122778

2698 W Canyon Ave., San Diego, CA 92123

Based in San Diego
Remodels & additionsHome builderGeneral contractor
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#23

Wallstar Design & Build

5.0 (20 Google reviews)
✔ CSLB License Verified #1136303

7995 Civita Blvd UNIT 525, San Diego, CA 92108

Based in San Diego
Design-buildRemodels & additionsHome builderGeneral contractor
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#28

EZ Design and Build

4.9 (44 Google reviews)
✔ CSLB License Verified #1110247

4550 Kearny Villa Rd STE 220, San Diego, CA 92123

Based in San Diego
Design-buildRemodels & additionsHome builderGeneral contractor
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#29

Adama Builders

5.0 (18 Google reviews)
✔ CSLB License Verified #1149734

5075 Camino De La Siesta #435, San Diego, CA 92108

Based in San Diego
General contractor
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#32

KAZA - Design & Build

4.9 (38 Google reviews)
✔ CSLB License Verified #1132846

888 Prospect St, La Jolla, CA 92037

Serves San Diego · based in La Jolla
Design-buildRemodels & additionsHome builderGeneral contractor
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#33

Specialty Design Build

5.0 (17 Google reviews)
✔ CSLB License Verified #799853

243 S Escondido Blvd #308, Escondido, CA 92025

Serves San Diego · based in Escondido
Design-buildRemodels & additionsHome builder
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#35

Nicolls Design Build

5.0 (17 Google reviews)
✔ CSLB License Verified #1003454

900 Orange Ave Ste 201, Coronado, CA 92118

Serves San Diego · based in Coronado
Design-buildGeneral contractor
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#50

Ambrosini Long

5.0 (9 Google reviews)
✔ CSLB License Verified #1115193

Service-area business · San Diego

Serves San Diego · based in San Diego
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#52

Snap ADU

4.8 (33 Google reviews)

1223 Cleveland Ave #200-115, San Diego, CA 92103

Based in San Diego
ADU specialistHome builderGeneral contractor
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#53

URBN BLDRS

5.0 (8 Google reviews)
✔ CSLB License Verified #816421

4231 Balboa Ave, San Diego, CA 92117

Based in San Diego
General contractor
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#66

Bernal Builders, Inc

4.7 (28 Google reviews)
✔ CSLB License Verified #1047688

3343 Durant St, San Diego, CA 92113

Based in San Diego
Remodels & additionsHome builderGeneral contractor
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#71

Home Services Plus

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

6431 Wandermere Dr, San Diego, CA 92120

Based in San Diego
Remodels & additionsHome builderGeneral contractor
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#72

Ritz ADU Design Build

4.7 (19 Google reviews)
✔ CSLB License Verified #239311

7878 Clairemont Mesa Blvd Ste K, San Diego, CA 92111

Based in San Diego
ADU specialistDesign-buildGarage conversionsRemodels & additionsHome builder
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#78

ADU Pros

5.0 (1 Google reviews)

500 La Terraza Blvd Suite 150, Escondido, CA 92025

Serves San Diego · based in Escondido
ADU specialist
CallView profile
#80

Casita ADU

5.0 (1 Google reviews)

1255 E Vista Way, Vista, CA 92084

Serves San Diego · based in Vista
ADU specialist
CallView profile
#82

Hauser ADU

5.0 (1 Google reviews)

845 15th St Floors 1-4, San Diego, CA 92101

Based in San Diego
ADU specialistPrefab / modularHome builder
CallView profile
#98

TrueBuild ADU

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

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

Based in San Diego
ADU specialistHome builderGeneral contractor
CallWebsiteView profile
#102

Vista ADU Builders

No rating yet (0 Google reviews)

110 Civic Center Dr Ste 187, Vista, CA 92084

Serves San Diego · based in Vista
ADU specialistHome builder
CallView profile
#108

ADU West

No rating yet (0 Google reviews)

7400 El Cajon Blvd #105, La Mesa, CA 91942

Serves San Diego · based in La Mesa
ADU specialistHome builder
CallWebsiteView profile
#109

Just ADUs

No rating yet (0 Google reviews)

979 Palm Valley Cir Unit D, Chula Vista, CA 91915

Serves San Diego · based in Chula Vista
ADU specialist
CallWebsiteView profile
#110

OneStop ADU

No rating yet (0 Google reviews)
✔ CSLB License Verified #1094838

2667 Camino del Rio S Ste 113, San Diego, CA 92108

Based in San Diego
ADU specialistHome builderGeneral contractor
CallWebsiteView profile
#115

ADU

No rating yet (0 Google reviews)

14956 Valle Del Sur Ct, San Diego, CA 92127

Based in San Diego
ADU specialist
View profile

San Diego ADU programs and pre-approved plans

Links verified November 2026. Program details change, so confirm current status with the city. See all SoCal pre-approved ADU plan programs.

Planning an ADU in San Diego? Start here

The ADU Permit Process in California: Step by Step (2026)ADU Rental Income and Property Taxes in California: What to ExpectPrefab and Modular ADUs in California: Real Costs, Permits and PitfallsHow to Legalize an Unpermitted ADU in California (AB 2533)

All ADU guides →

San Diego ADU FAQ

How many ADU builders serve San Diego?

Our directory lists 120 ADU builders and contractors that appear for San Diego on Google Maps, including companies based in nearby San Diego County communities.

Do I need a permit to build an ADU in San Diego?

Yes. ADUs need a building permit from the City of San Diego, 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 San Diego?

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 San Diego 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

Chula Vista 86Oceanside 56Escondido 110Carlsbad 67El Cajon 22Vista 60San Marcos 66Encinitas 64La Mesa 41Santee 67National City 99Poway 49
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