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ADU Builders in Tustin, CA

98 builders · ranked by Google rating and review volume · 48 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 Tustin 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 Orange County, Tustin had a 2020 Census population of about 80,276. We found 98 ADU builders and contractors that show up for Tustin homeowners on Google Maps, 3 of them based in the city itself. Their average Google rating is 4.9 stars. 33 market themselves specifically as ADU builders, and 5 mention garage conversions. 48 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 Ivy Builders Remodeling.

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.

#5

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 Tustin · based in Santa Ana
General contractor
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#7

Tuscany Builders

5.0 (28 Google reviews)
✔ CSLB License Verified #822306

Service-area business · Tustin

Serves Tustin · based in Tustin
Remodels & additionsHome builderGeneral contractor
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#8

Modernyze

5.0 (26 Google reviews)
✔ CSLB License Verified #1019812

2323 Main St, Irvine, CA 92614

Serves Tustin · based in Irvine
Remodels & additionsHome builderGeneral contractor
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#10

Look Wow Builders

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

1600 Dove St Ste 260, Newport Beach, CA 92660

Serves Tustin · based in Newport Beach
Remodels & additionsHome builderGeneral contractor
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#13

Tenaya Homes

5.0 (22 Google reviews)
✔ CSLB License Verified #1069583

Service-area business · Tustin

Serves Tustin · based in Tustin
Remodels & additionsHome builder
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#18

OC Quality Builders

4.9 (30 Google reviews)
✔ CSLB License Verified #1148925

22981 Triton Way Unit C, Laguna Hills, CA 92653

Serves Tustin · based in Laguna Hills
Remodels & additionsHome builderGeneral contractor
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#19

Builpire

4.9 (28 Google reviews)
✔ CSLB License Verified #1052330

1427 E Borchard Ave, Santa Ana, CA 92705

Serves Tustin · based in Santa Ana
Remodels & additionsGeneral 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 Tustin · based in Anaheim
ADU specialist
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#34

VICOREL

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

2372 Morse Ave Ste 746, Irvine, CA 92614

Serves Tustin · based in Irvine
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#44

CP Construction

5.0 (5 Google reviews)
✔ CSLB License Verified #971083

Service-area business · Tustin

Serves Tustin · based in Tustin
Remodels & additionsHome builderGeneral contractor
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#46

ADUscale

5.0 (4 Google reviews)

528 W Hampshire Ave, Anaheim, CA 92805

Serves Tustin · based in Anaheim
ADU specialistHome builder
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#47

Dv construction

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

10055 Lampson Ave, Garden Grove, CA 92840

Serves Tustin · based in Garden Grove
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#48

Tech LA Builder

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

20381 Lake Forest Dr, Lake Forest, CA 92630

Serves Tustin · based in Lake Forest
General contractor
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#61

Pelican ADU Builders

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

1924 Barranca Pkwy Unit 1, Irvine, CA 92606

Serves Tustin · based in Irvine
ADU specialistGeneral contractor
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#63

Stone Development Inc

5.0 (2 Google reviews)
✔ CSLB License Verified #1146382

1 Jenner Ste 150, Irvine, CA 92618

Serves Tustin · based in Irvine
Remodels & additionsHome builderGeneral contractor
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#65

White Lotus Homes

5.0 (2 Google reviews)
✔ CSLB License Verified #1124683

650 Town Center Dr #1670, Costa Mesa, CA 92626

Serves Tustin · based in Costa Mesa
Home builder
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#66

Lucero Construction

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

10442 S Crawford Canyon Rd, Santa Ana, CA 92705

Serves Tustin · based in Santa Ana
Remodels & additionsGeneral contractor
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#68

KoBolt Construction

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

406 E Commonwealth Ave #3, Fullerton, CA 92832

Serves Tustin · based in Fullerton
Remodels & additionsHome builderGeneral contractor
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#70

USA Builders

5.0 (1 Google reviews)

Service-area business · Tustin

Serves Tustin · 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 Tustin · based in Irvine
Remodels & additionsGeneral contractor
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#80

J. P Homes

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

780 N Euclid St Suite 201, Anaheim, CA 92801

Serves Tustin · based in Anaheim
Remodels & additionsHome builderGeneral contractor
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#84

Skye Construction

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

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

Serves Tustin · based in Santa Ana
General contractor
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#85

Orange Innovation

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

15122 Starboard St, Garden Grove, CA 92843

Serves Tustin · based in Garden Grove
General contractor
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#87

Rigi Home & Garden Design LLC

No rating yet (0 Google reviews)
✔ CSLB License Verified #1161845

Service-area business · Newport Beach

Serves Tustin · based in Newport Beach
Garage conversionsRemodels & additionsHome builderGeneral contractor
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#91

ADU-BUILDS

No rating yet (0 Google reviews)
✔ CSLB License Verified #1150636

Service-area business · Newport Beach

Serves Tustin · based in Newport Beach
ADU specialist
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#93

OCADUSTUDIO

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

13251 Pinto Rd, Garden Grove, CA 92843

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

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

Planning an ADU in Tustin? Start here

SB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in CaliforniaHow to Legalize an Unpermitted ADU in California (AB 2533)How Much Does It Cost to Build an ADU in Southern California?How to Choose an ADU Builder in Southern California: 15-Point Checklist

All ADU guides →

Tustin ADU FAQ

How many ADU builders serve Tustin?

Our directory lists 98 ADU builders and contractors that appear for Tustin on Google Maps, including companies based in nearby Orange County communities.

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

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

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 Tustin 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 23Orange 95Costa Mesa 103Mission Viejo 59Westminster 53Lake Forest 60Newport Beach 96
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