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ADU Builders in Thousand Oaks, CA

122 builders · ranked by Google rating and review volume · 65 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 Thousand Oaks 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 126,966 residents at the 2020 Census, Thousand Oaks is one of Ventura County's established communities. We found 122 ADU builders and contractors that show up for Thousand Oaks homeowners on Google Maps, 9 of them based in the city itself. Their average Google rating is 4.9 stars. 30 market themselves specifically as ADU builders, and 11 mention garage conversions. 65 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are KM BUILDERS, LA Family Builders Inc and ADU Conversion.

Ventura County mixes coastal and inland communities. Coastal parcels may need a coastal permit, and fire-hazard zones can add requirements for siting and materials.

#1

KM BUILDERS

5.0 (522 Google reviews)

19562 Ventura Blvd Ste 209, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
Garage conversionsRemodels & additionsGeneral contractor
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#3

ADU Conversion

5.0 (86 Google reviews)

Service-area business · Simi Valley

Serves Thousand Oaks · based in Simi Valley
ADU specialistRemodels & additionsGeneral contractor
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#4

ODM Construction

5.0 (71 Google reviews)
✔ CSLB License Verified #1069960

28720 Roadside Dr #310, Agoura Hills, CA 91301

Serves Thousand Oaks · based in Agoura Hills
Remodels & additionsHome builderGeneral contractor
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#10

SOUL Builders

5.0 (55 Google reviews)
✔ CSLB License Verified #1103425

18163 Arminta St, Reseda, CA 91335

Serves Thousand Oaks · based in Reseda
General contractor
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#11

Eden Builders

5.0 (54 Google reviews)
✔ CSLB License Verified #891510

4616 Santa Lucia Dr, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builderGeneral contractor
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#12

Flip It Homes Inc.

5.0 (51 Google reviews)
✔ CSLB License Verified #1043456

20501 Ventura Blvd #135, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Home builder
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#13

RnD Builders Inc

5.0 (50 Google reviews)
✔ CSLB License Verified #1081122

21250 Califa St #214, Woodland Hills, CA 91367

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builderGeneral contractor
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#21

X Buildup

5.0 (32 Google reviews)
✔ CSLB License Verified #1075868

21825 Erwin St Ste 1076, Woodland Hills, CA 91367

Serves Thousand Oaks · based in Woodland Hills
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#22

Boutique Construction

5.0 (31 Google reviews)
✔ CSLB License Verified #1051070

19730 Ventura Blvd Ste 25, Woodland Hills, CA 91367

Serves Thousand Oaks · based in Woodland Hills
General contractor
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#23

ADU Concepts

5.0 (30 Google reviews)
✔ CSLB License Verified #1018294

18375 Ventura Blvd, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
ADU specialist
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#24

Preferred Home Builders

4.9 (135 Google reviews)
✔ CSLB License Verified #773147

21204 Vanowen St, Canoga Park, CA 91303

Serves Thousand Oaks · based in Canoga Park
Garage conversionsRemodels & additionsHome builderGeneral contractor
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#27

Syan Builders Inc

5.0 (29 Google reviews)
✔ CSLB License Verified #1129951

19040 Bessemer St, Tarzana, CA 91335

Serves Thousand Oaks · based in Tarzana
Remodels & additionsGeneral contractor
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#28

HomeAdd

5.0 (28 Google reviews)

22256 Buenaventura St, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builderGeneral contractor
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#29

MY Home Builders

4.9 (99 Google reviews)
✔ CSLB License Verified #1002927

20720 Ventura Blvd Unit 280, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builderGeneral contractor
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#31

Express Remodeling Inc

4.9 (72 Google reviews)
✔ CSLB License Verified #1035806

1872 Winterdew Ave, Simi Valley, CA 93065

Serves Thousand Oaks · based in Simi Valley
Remodels & additionsGeneral contractor
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#32

Adar Builders Inc

4.9 (67 Google reviews)
✔ CSLB License Verified #1051859

7673 Winnetka Ave, Winnetka, CA 91306

Serves Thousand Oaks · based in Winnetka
Remodels & additionsHome builderGeneral contractor
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#33

Vivid Homes Inc

4.9 (65 Google reviews)
✔ CSLB License Verified #1052058

22900 Ventura Blvd #260, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builder
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#34

MASTER IN DESIGN

4.9 (62 Google reviews)
✔ CSLB License Verified #979219

6011 Reseda Blvd, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
Remodels & additionsHome builderGeneral contractor
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#36

ITM Construction

5.0 (21 Google reviews)
✔ CSLB License Verified #1033834

20329 Cantara St, Winnetka, CA 91306

Serves Thousand Oaks · based in Winnetka
Remodels & additionsGeneral contractor
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#37

360 Builders

5.0 (20 Google reviews)

19562 Ventura Blvd #230, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
Home builderGeneral contractor
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#39

Nobel Builders

5.0 (19 Google reviews)
✔ CSLB License Verified #1105489

21402 Wyandotte St, Canoga Park, CA 91303

Serves Thousand Oaks · based in Canoga Park
Remodels & additionsHome builderGeneral contractor
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#40

ATARI Home Builders

4.9 (44 Google reviews)
✔ CSLB License Verified #1088740

19720 Ventura Blvd e1, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
Remodels & additionsHome builderGeneral contractor
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#41

CONSTRUCTION BY MAYA INC.

4.9 (41 Google reviews)
✔ CSLB License Verified #1021375

4500 Park Granada UNIT 202, Calabasas, CA 91302

Serves Thousand Oaks · based in Calabasas
Remodels & additionsHome builderGeneral contractor
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#42

Upfront Remodeling

5.0 (18 Google reviews)
✔ CSLB License Verified #1101426

5676 Lindley Ave, Encino, CA 91316

Serves Thousand Oaks · based in Encino
Remodels & additionsHome builderGeneral contractor
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#44

KōRA Design Build

5.0 (16 Google reviews)

6980 N Platt Ave Unit 1 Studio, West Hills, CA 91307

Serves Thousand Oaks · based in West Hills
Design-buildRemodels & additionsHome builderGeneral contractor
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#48

Reef Builders Inc

5.0 (15 Google reviews)
✔ CSLB License Verified #1096502

Service-area business · Calabasas

Serves Thousand Oaks · based in Calabasas
Remodels & additionsHome builderGeneral contractor
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#50

National Development Group

4.9 (25 Google reviews)
✔ CSLB License Verified #1080447

2955 E Hillcrest Dr #129, Westlake Village, CA 91362

Serves Thousand Oaks · based in Westlake Village
Remodels & additionsHome builderGeneral contractor
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#52

DG Builders inc

5.0 (13 Google reviews)
✔ CSLB License Verified #1067237

23073 Enadia Way, West Hills, CA 91307

Serves Thousand Oaks · based in West Hills
Remodels & additionsHome builderGeneral contractor
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#54

Built To Perfection, Inc.

4.8 (119 Google reviews)
✔ CSLB License Verified #837987

21201 Victory Blvd Unit 235, Canoga Park, CA 91303

Serves Thousand Oaks · based in Canoga Park
Remodels & additionsHome builderGeneral contractor
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#56

Mayan Home Builders

5.0 (12 Google reviews)
✔ CSLB License Verified #1107341

3625 E Thousand Oaks Blvd, Thousand Oaks, CA 91362

Based in Thousand Oaks
Remodels & additionsHome builderGeneral contractor
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#58

H&A My Design, Inc.

4.8 (78 Google reviews)
✔ CSLB License Verified #1110519

6723 Variel Ave, Canoga Park, CA 91303

Serves Thousand Oaks · based in Canoga Park
Remodels & additionsGeneral contractor
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#60

ADU by Kn Remodeling

5.0 (11 Google reviews)

19709 Ventura Blvd Unit 202, Woodland Hills, CA 91364

Serves Thousand Oaks · based in Woodland Hills
ADU specialistRemodels & additionsHome builder
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#61

HB Links

5.0 (10 Google reviews)

Service-area business · Calabasas

Serves Thousand Oaks · based in Calabasas
Remodels & additionsHome builderGeneral contractor
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#63

Everlast Home Builders

5.0 (9 Google reviews)

6740 Fallbrook Ave #107, West Hills, CA 91307

Serves Thousand Oaks · based in West Hills
Garage conversionsRemodels & additionsHome builder
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#68

Home Creations

5.0 (8 Google reviews)
✔ CSLB License Verified #1057627

22938 Leonora Dr, Woodland Hills, CA 91367

Serves Thousand Oaks · based in Woodland Hills
General contractor
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#73

Ohana Remodeling

5.0 (7 Google reviews)
✔ CSLB License Verified #1101325

6735 Glade Ave, Los Angeles, CA 91303

Serves Thousand Oaks · based in Los Angeles
Remodels & additionsGeneral contractor
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#75

Alvapareen Construction

5.0 (6 Google reviews)
✔ CSLB License Verified #1081852

18039 Chatsworth St #33603, Granada Hills, CA 91344

Serves Thousand Oaks · based in Granada Hills
Remodels & additionsGeneral contractor
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#80

JLC Home Remodeling

5.0 (5 Google reviews)
✔ CSLB License Verified #1024612

5308 Derry Ave, Agoura Hills, CA 91301

Serves Thousand Oaks · based in Agoura Hills
Remodels & additionsGeneral contractor
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#83

EN Builders Inc

4.8 (11 Google reviews)
✔ CSLB License Verified #977804

18375 Ventura Blvd #227, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
General contractor
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#85

MH CONSTRUCTION INC

5.0 (4 Google reviews)
✔ CSLB License Verified #1148205

19223 Chase St, Northridge, CA 91324

Serves Thousand Oaks · based in Northridge
General contractor
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#92

GNK Construction

4.7 (12 Google reviews)
✔ CSLB License Verified #1052060

6618 Smoke Tree Ave, Oak Park, CA 91377

Serves Thousand Oaks · based in Oak Park
General contractor
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#93

ADU XPERT

5.0 (2 Google reviews)

19849 Nordhoff St, Northridge, CA 91324

Serves Thousand Oaks · based in Northridge
ADU specialistHome builder
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#97

Level Up Contractor Inc.

4.6 (37 Google reviews)
✔ CSLB License Verified #1053375

6700 Fallbrook Ave #224b, West Hills, CA 91307

Serves Thousand Oaks · based in West Hills
Garage conversionsRemodels & additionsHome builderGeneral contractor
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#100

Manchen Construction

4.6 (22 Google reviews)
✔ CSLB License Verified #1043435

7039 Sylvia Ave, Reseda, CA 91335

Serves Thousand Oaks · based in Reseda
Garage conversionsRemodels & additionsHome builderGeneral contractor
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#102

Doobek Builders

4.6 (13 Google reviews)
✔ CSLB License Verified #980653

5308 Derry Ave Unit I-102, Agoura Hills, CA 91301

Serves Thousand Oaks · based in Agoura Hills
Remodels & additionsHome builderGeneral contractor
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#105

Alto Builders

5.0 (1 Google reviews)
✔ CSLB License Verified #1118841

Service-area business · Agoura Hills

Serves Thousand Oaks · based in Agoura Hills
Remodels & additionsHome builderGeneral contractor
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#113

ADU1

1.0 (1 Google reviews)

19326 Ventura Blvd #200, Tarzana, CA 91356

Serves Thousand Oaks · based in Tarzana
ADU specialist
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#122

ADU Design Build

No rating yet (0 Google reviews)

Service-area business · Thousand Oaks

Serves Thousand Oaks · based in Thousand Oaks
ADU specialistDesign-buildGeneral contractor
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Permits and pre-approved plans in Thousand Oaks

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

Planning an ADU in Thousand Oaks? Start here

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

All ADU guides →

Thousand Oaks ADU FAQ

How many ADU builders serve Thousand Oaks?

Our directory lists 122 ADU builders and contractors that appear for Thousand Oaks on Google Maps, including companies based in nearby Ventura County communities.

Do I need a permit to build an ADU in Thousand Oaks?

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

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 Thousand Oaks 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 Ventura County

Oxnard 31Simi Valley 100Ventura 26Camarillo 48Moorpark 8Santa Paula 5Port Hueneme 5
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