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ADU Builders in Oceanside, CA

56 builders · ranked by Google rating and review volume · 30 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 Oceanside 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 174,068 residents at the 2020 Census, Oceanside is one of San Diego County's largest communities. We found 56 ADU builders and contractors that show up for Oceanside homeowners on Google Maps, 6 of them based in the city itself. Their average Google rating is 4.9 stars. 20 market themselves specifically as ADU builders, and 1 mention garage conversions. 30 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 Oceanside · based in Encinitas
Remodels & additionsHome builderGeneral contractor
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#6

TNT Design & Build

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

3142 Tiger Run Ct #108, Carlsbad, CA 92010

Serves Oceanside · based in Carlsbad
Design-buildRemodels & additionsHome builderGeneral contractor
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#8

CASITA ADU

5.0 (25 Google reviews)

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

Serves Oceanside · based in Carlsbad
ADU specialist
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#11

Premier Pro Builders

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

701 Palomar Airport Rd #300, Carlsbad, CA 92011

Serves Oceanside · based in Carlsbad
Remodels & additionsHome builderGeneral contractor
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#12

Specialty Design Build

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

243 S Escondido Blvd #308, Escondido, CA 92025

Serves Oceanside · based in Escondido
Design-buildRemodels & additionsHome builder
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#14

AE Carlson Design & Build

5.0 (17 Google reviews)
✔ CSLB License Verified #1115290

1902 Wright Pl Ste 200 #277, Carlsbad, CA 92008

Serves Oceanside · based in Carlsbad
Design-buildRemodels & additionsGeneral contractor
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#15

B. A. Worthing, Inc.

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

5145 Avenida Encinas Ste J, Carlsbad, CA 92008

Serves Oceanside · based in Carlsbad
Remodels & additionsHome builderGeneral contractor
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#17

Southshore Homes

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

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

Based in Oceanside
Home builderGeneral contractor
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#36

Buildable

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

1405 Ferrara Ct, Escondido, CA 92025

Serves Oceanside · based in Escondido
Remodels & additionsHome builderGeneral contractor
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#38

ADU Pros

5.0 (1 Google reviews)

500 La Terraza Blvd Suite 150, Escondido, CA 92025

Serves Oceanside · based in Escondido
ADU specialist
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#41

Casita ADU

5.0 (1 Google reviews)

1255 E Vista Way, Vista, CA 92084

Serves Oceanside · based in Vista
ADU specialist
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#42

JOE MOORE CONST. INC

4.4 (5 Google reviews)
✔ CSLB License Verified #387345

3612 Valley St, Carlsbad, CA 92008

Serves Oceanside · based in Carlsbad
General contractor
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#44

Merribuild

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

804 Pier View Wy, Oceanside, CA 92054

Based in Oceanside
Remodels & additionsHome builder
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#47

Vista ADU Builders

No rating yet (0 Google reviews)

110 Civic Center Dr Ste 187, Vista, CA 92084

Serves Oceanside · based in Vista
ADU specialistHome builder
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#52

ZOOM ADU

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

2888 Loker Ave E Ste 110, Carlsbad, CA 92010

Serves Oceanside · based in Carlsbad
ADU specialistGeneral contractor
CallWebsiteView profile
#54

Turnkey ADU

No rating yet (0 Google reviews)

Service-area business · Encinitas

Serves Oceanside · based in Encinitas
ADU specialist
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Permits and pre-approved plans in Oceanside

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

Planning an ADU in Oceanside? Start here

How Long Does It Take to Build an ADU in Southern California?JADU vs ADU in California: Size, Rules, Cost and Which to BuildAB 1033: Can You Sell an ADU Separately in California?How to Legalize an Unpermitted ADU in California (AB 2533)

All ADU guides →

Oceanside ADU FAQ

How many ADU builders serve Oceanside?

Our directory lists 56 ADU builders and contractors that appear for Oceanside on Google Maps, including companies based in nearby San Diego County communities.

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

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

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