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ADU Builders in Orange, CA

95 builders · ranked by Google rating and review volume · 46 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 Orange 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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Orange is home to about 139,911 people (2020 Census) in Orange County. We found 95 ADU builders and contractors that show up for Orange homeowners on Google Maps, 14 of them based in the city itself. Their average Google rating is 4.8 stars. 32 market themselves specifically as ADU builders, and 5 mention garage conversions. 46 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Primework Construction, John Christopher Construction, Inc. and DYM Builders Group.

In Orange County, HOA and design-standard questions come up often. State law voids CC&Rs that ban ADUs, but HOAs can still apply reasonable objective standards. Compact lots make attached units and garage conversions popular.

#4

OC Builders Group

5.0 (76 Google reviews)
✔ CSLB License Verified #1052090

600 W Santa Ana Blvd Ste 114-499, Santa Ana, CA 92701

Serves Orange · based in Santa Ana
General contractor
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#8

Look Wow Builders

5.0 (24 Google reviews)
✔ CSLB License Verified #1121005

1600 Dove St Ste 260, Newport Beach, CA 92660

Serves Orange · based in Newport Beach
Remodels & additionsHome builderGeneral contractor
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#9

HQ Remodeling & Design Inc

4.9 (70 Google reviews)
✔ CSLB License Verified #1041842

17011 Beach Blvd suite 900, Huntington Beach, CA 92647

Serves Orange · based in Huntington Beach
Remodels & additionsGeneral contractor
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#19

Better Remodels

5.0 (16 Google reviews)
✔ CSLB License Verified #1047759

249 E Emerson Ave Suite A, Orange, CA 92865

Based in Orange
Remodels & additionsHome builderGeneral contractor
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#20

Vision ADU

5.0 (14 Google reviews)
✔ CSLB License Verified #1115842

1440 S State College Blvd #6h, Anaheim, CA 92806

Serves Orange · based in Anaheim
ADU specialist
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#27

JR Elite Builders

5.0 (11 Google reviews)
✔ CSLB License Verified #1135623

Service-area business · Yorba Linda

Serves Orange · based in Yorba Linda
Remodels & additionsGeneral contractor
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#33

VICOREL

5.0 (9 Google reviews)
✔ CSLB License Verified #1143460

2372 Morse Ave Ste 746, Irvine, CA 92614

Serves Orange · based in Irvine
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#47

ADUscale

5.0 (4 Google reviews)

528 W Hampshire Ave, Anaheim, CA 92805

Serves Orange · based in Anaheim
ADU specialistHome builder
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#49

Dv construction

5.0 (4 Google reviews)
✔ CSLB License Verified #1116638

10055 Lampson Ave, Garden Grove, CA 92840

Serves Orange · based in Garden Grove
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#50

Tech LA Builder

5.0 (4 Google reviews)
✔ CSLB License Verified #1097275

20381 Lake Forest Dr, Lake Forest, CA 92630

Serves Orange · based in Lake Forest
General contractor
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#64

Pelican ADU Builders

5.0 (2 Google reviews)
✔ CSLB License Verified #1106515

1924 Barranca Pkwy Unit 1, Irvine, CA 92606

Serves Orange · based in Irvine
ADU specialistGeneral contractor
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#68

Lucero Construction

5.0 (2 Google reviews)
✔ CSLB License Verified #1082093

10442 S Crawford Canyon Rd, Santa Ana, CA 92705

Serves Orange · based in Santa Ana
Remodels & additionsGeneral contractor
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#70

KoBolt Construction

4.6 (11 Google reviews)
✔ CSLB License Verified #1024785

406 E Commonwealth Ave #3, Fullerton, CA 92832

Serves Orange · based in Fullerton
Remodels & additionsHome builderGeneral contractor
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#72

USA Builders

5.0 (1 Google reviews)

Service-area business · Tustin

Serves Orange · based in Tustin
Remodels & additionsHome builderGeneral contractor
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#75

LMX Builders

4.5 (15 Google reviews)
✔ CSLB License Verified #949201

1 Hollinwood, Irvine, CA 92618

Serves Orange · based in Irvine
Remodels & additionsGeneral contractor
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#78

J. P Homes

1.0 (1 Google reviews)
✔ CSLB License Verified #1090320

780 N Euclid St Suite 201, Anaheim, CA 92801

Serves Orange · based in Anaheim
Remodels & additionsHome builderGeneral contractor
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#83

Skye Construction

No rating yet (0 Google reviews)
✔ CSLB License Verified #1068435

1302 E Hunter Ave #C, Santa Ana, CA 92705

Serves Orange · based in Santa Ana
General contractor
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#84

Orange Innovation

No rating yet (0 Google reviews)
✔ CSLB License Verified #832810

15122 Starboard St, Garden Grove, CA 92843

Serves Orange · based in Garden Grove
General contractor
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#86

J&R ADU

No rating yet (0 Google reviews)

Service-area business · Fountain Valley

Serves Orange · based in Fountain Valley
ADU specialistPrefab / modularHome builder
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#89

Navo Builders

No rating yet (0 Google reviews)
✔ CSLB License Verified #1126018

1315 S Iris St, Anaheim, CA 92805

Serves Orange · based in Anaheim
General contractor
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#93

OCADUSTUDIO

No rating yet (0 Google reviews)
✔ CSLB License Verified #1155045

13251 Pinto Rd, Garden Grove, CA 92843

Serves Orange · based in Garden Grove
ADU specialistGeneral contractor
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Permits and pre-approved plans in Orange

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

Planning an ADU in Orange? Start here

JADU vs ADU in California: Size, Rules, Cost and Which to BuildSB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in CaliforniaHow to Legalize an Unpermitted ADU in California (AB 2533)Prefab and Modular ADUs in California: Real Costs, Permits and Pitfalls

All ADU guides →

Orange ADU FAQ

How many ADU builders serve Orange?

Our directory lists 95 ADU builders and contractors that appear for Orange on Google Maps, including companies based in nearby Orange County communities.

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

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

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 Orange 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 Orange County

Anaheim 114Santa Ana 97Irvine 107Huntington Beach 88Garden Grove 97Fullerton 23Costa Mesa 103Mission Viejo 59Westminster 53Lake Forest 60Newport Beach 96Buena Park 52
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