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ADU Builders in Carlsbad, CA

67 builders · ranked by Google rating and review volume · 34 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 Carlsbad 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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With roughly 114,746 residents at the 2020 Census, Carlsbad is one of San Diego County's established communities. We found 67 ADU builders and contractors that show up for Carlsbad homeowners on Google Maps, 16 of them based in the city itself. Their average Google rating is 4.9 stars. 24 market themselves specifically as ADU builders, and 2 mention garage conversions. 34 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are dmb Builders Inc, Ambar Builders Inc. and ADU Plumbing LLC.

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.

#1

dmb Builders Inc

5.0 (62 Google reviews)
✔ CSLB License Verified #1078610

Service-area business · Encinitas

Serves Carlsbad · based in Encinitas
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#6

TNT Design & Build

4.9 (175 Google reviews)
✔ CSLB License Verified #1012379

3142 Tiger Run Ct #108, Carlsbad, CA 92010

Based in Carlsbad
Design-buildRemodels & additionsHome builderGeneral contractor
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#13

Premier Pro Builders

5.0 (19 Google reviews)
✔ CSLB License Verified #1104032

701 Palomar Airport Rd #300, Carlsbad, CA 92011

Based in Carlsbad
Remodels & additionsHome builderGeneral contractor
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#14

Specialty Design Build

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

243 S Escondido Blvd #308, Escondido, CA 92025

Serves Carlsbad · based in Escondido
Design-buildRemodels & additionsHome builder
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#17

B. A. Worthing, Inc.

4.9 (29 Google reviews)
✔ CSLB License Verified #1104236

5145 Avenida Encinas Ste J, Carlsbad, CA 92008

Based in Carlsbad
Remodels & additionsHome builderGeneral contractor
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#18

Poseidon Remodeling

5.0 (13 Google reviews)
✔ CSLB License Verified #1017449

209 N Ditmar St Fl 2, Oceanside, CA 92054

Serves Carlsbad · based in Oceanside
Remodels & additionsGeneral contractor
CallWebsiteView profile
#19

Southshore Homes

5.0 (11 Google reviews)
✔ CSLB License Verified #1071098

2821 Oceanside Blvd Suites A-C, Oceanside, CA 92054

Serves Carlsbad · based in Oceanside
Home builderGeneral contractor
CallWebsiteView profile
#37

ADU O’SIDE

5.0 (3 Google reviews)
✔ CSLB License Verified #1129042

5074 Gold Dr, Oceanside, CA 92057

Serves Carlsbad · based in Oceanside
ADU specialistHome builder
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#41

Buildable

5.0 (2 Google reviews)
✔ CSLB License Verified #1080271

1405 Ferrara Ct, Escondido, CA 92025

Serves Carlsbad · based in Escondido
Remodels & additionsHome builderGeneral contractor
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#43

Eco Minded Solutions

5.0 (2 Google reviews)
✔ CSLB License Verified #948204

608 Crest Dr, Encinitas, CA 92024

Serves Carlsbad · based in Encinitas
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#44

ADU Pros

5.0 (1 Google reviews)

500 La Terraza Blvd Suite 150, Escondido, CA 92025

Serves Carlsbad · based in Escondido
ADU specialist
CallView profile
#47

Casita ADU

5.0 (1 Google reviews)

1255 E Vista Way, Vista, CA 92084

Serves Carlsbad · based in Vista
ADU specialist
CallView profile
#51

Merribuild

4.1 (16 Google reviews)
✔ CSLB License Verified #595872

804 Pier View Wy, Oceanside, CA 92054

Serves Carlsbad · based in Oceanside
Remodels & additionsHome builder
CallWebsiteView profile
#53

House to Home

3.6 (17 Google reviews)

374 Encinitas Blvd Ste b, Encinitas, CA 92024

Serves Carlsbad · based in Encinitas
Garage conversionsRemodels & additionsHome builderGeneral contractor
CallView profile
#55

Vista ADU Builders

No rating yet (0 Google reviews)

110 Civic Center Dr Ste 187, Vista, CA 92084

Serves Carlsbad · based in Vista
ADU specialistHome builder
CallView profile
#61

ZOOM ADU

No rating yet (0 Google reviews)
✔ CSLB License Verified #1145664

2888 Loker Ave E Ste 110, Carlsbad, CA 92010

Based in Carlsbad
ADU specialistGeneral contractor
CallWebsiteView profile
#64

Turnkey ADU

No rating yet (0 Google reviews)

Service-area business · Encinitas

Serves Carlsbad · based in Encinitas
ADU specialist
View profile
#65

ADUware

No rating yet (0 Google reviews)

1470 Encinitas Blvd, Encinitas, CA 92024

Serves Carlsbad · based in Encinitas
ADU specialist
CallWebsiteView profile

Permits and pre-approved plans in Carlsbad

ADU permits in Carlsbad 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 Carlsbad whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in Carlsbad? Start here

Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignHow Much Does It Cost to Build an ADU in Southern California?How to Choose an ADU Builder in Southern California: 15-Point ChecklistThe ADU Permit Process in California: Step by Step (2026)

All ADU guides →

Carlsbad ADU FAQ

How many ADU builders serve Carlsbad?

Our directory lists 67 ADU builders and contractors that appear for Carlsbad on Google Maps, including companies based in nearby San Diego County communities.

Do I need a permit to build an ADU in Carlsbad?

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

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