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ADU Builders in Lake Forest, CA

60 builders · ranked by Google rating and review volume · 29 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 Lake Forest 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, Lake Forest had a 2020 Census population of about 85,858. We found 60 ADU builders and contractors that show up for Lake Forest homeowners on Google Maps, 7 of them based in the city itself. Their average Google rating is 4.9 stars. 14 market themselves specifically as ADU builders, and 2 mention garage conversions. 29 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are DejaVu Remodeling, Tixan Construction and TG Renovation Inc.

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.

#8

Bud Remodeling

5.0 (26 Google reviews)
✔ CSLB License Verified #1067878

22772 Centre Dr #100, Lake Forest, CA 92630

Based in Lake Forest
Remodels & additionsGeneral contractor
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#10

RIA Group

5.0 (25 Google reviews)

Service-area business · Rancho Santa Margarita

Serves Lake Forest · based in Rancho Santa Margarita
Remodels & additionsHome builderGeneral contractor
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#12

Kol & Co.

5.0 (24 Google reviews)

23431 Blue Bird Dr, Lake Forest, CA 92630

Based in Lake Forest
Remodels & additionsHome builderGeneral contractor
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#14

True Home Builders

5.0 (19 Google reviews)
✔ CSLB License Verified #1073280

14 Hughes Ste B204, Irvine, CA 92618

Serves Lake Forest · based in Irvine
Remodels & additionsHome builder
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#17

D2A Construction

4.9 (36 Google reviews)
✔ CSLB License Verified #1122027

23121 Plaza Pointe Dr Ste 105, Laguna Hills, CA 92653

Serves Lake Forest · based in Laguna Hills
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#18

Modern Creation Inc.

5.0 (16 Google reviews)
✔ CSLB License Verified #1070430

23046 Avenida De La Carlota #600, Laguna Hills, CA 92653

Serves Lake Forest · based in Laguna Hills
Remodels & additions
CallWebsiteView profile
#19

OC Quality Builders

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

22981 Triton Way Unit C, Laguna Hills, CA 92653

Serves Lake Forest · based in Laguna Hills
Remodels & additionsHome builderGeneral contractor
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#21

IGS Construction

5.0 (14 Google reviews)
✔ CSLB License Verified #1087602

23362 Madero # L, Mission Viejo, CA 92691

Serves Lake Forest · based in Mission Viejo
Remodels & additionsHome builderGeneral contractor
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#25

ProHome Remodels

4.9 (18 Google reviews)
✔ CSLB License Verified #1140564

25381 Commercentre Dr, Lake Forest, CA 92630

Based in Lake Forest
Remodels & additionsHome builderGeneral contractor
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#31

Kash Construction Inc

5.0 (7 Google reviews)
✔ CSLB License Verified #1028459

23301 Ridge Rte Dr, Laguna Hills, CA 92653

Serves Lake Forest · based in Laguna Hills
Remodels & additionsGeneral contractor
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#32

Excel Design & Build

5.0 (6 Google reviews)
✔ CSLB License Verified #956734

25108 Marguerite Pkwy STE. A #4, Mission Viejo, CA 92692

Serves Lake Forest · based in Mission Viejo
Design-buildGeneral contractor
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#33

SDB

5.0 (6 Google reviews)
✔ CSLB License Verified #1072529

27601 Forbes Rd #16, Laguna Niguel, CA 92677

Serves Lake Forest · based in Laguna Niguel
Home builderGeneral contractor
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#39

Plus Home ADU

5.0 (3 Google reviews)
✔ CSLB License Verified #1062063

Service-area business · Aliso Viejo

Serves Lake Forest · based in Aliso Viejo
ADU specialistRemodels & additionsHome builderGeneral contractor
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#42

CCS ADU Services

5.0 (2 Google reviews)

Service-area business · San Clemente

Serves Lake Forest · based in San Clemente
ADU specialistHome builder
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#45

Stone Development Inc

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

1 Jenner Ste 150, Irvine, CA 92618

Serves Lake Forest · based in Irvine
Remodels & additionsHome builderGeneral contractor
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#49

USA Builders

5.0 (1 Google reviews)

Service-area business · Tustin

Serves Lake Forest · based in Tustin
Remodels & additionsHome builderGeneral contractor
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#50

DWELLO ADU INC

5.0 (1 Google reviews)

23361 Madero Ste 235, Mission Viejo, CA 92691

Serves Lake Forest · based in Mission Viejo
ADU specialistGeneral contractor
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#51

OC Coastal Builder

5.0 (1 Google reviews)
✔ CSLB License Verified #992307

Service-area business · Mission Viejo

Serves Lake Forest · based in Mission Viejo
Remodels & additionsGeneral contractor
CallView profile
#52

LMX Builders

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

1 Hollinwood, Irvine, CA 92618

Serves Lake Forest · based in Irvine
Remodels & additionsGeneral contractor
CallWebsiteView profile
#53

EA Design And Build

4.2 (5 Google reviews)
✔ CSLB License Verified #1080602

Service-area business · Rancho Santa Margarita

Serves Lake Forest · based in Rancho Santa Margarita
Design-build
CallWebsiteView profile
#59

Seagull Construction OC

No rating yet (0 Google reviews)
✔ CSLB License Verified #1154091

28351 Via Alfonse, Laguna Niguel, CA 92677

Serves Lake Forest · based in Laguna Niguel
Remodels & additionsHome builderGeneral contractor
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Permits and pre-approved plans in Lake Forest

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

Planning an ADU in Lake Forest? Start here

Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignJADU vs ADU in California: Size, Rules, Cost and Which to BuildHow Long Does It Take to Build an ADU in Southern California?Garage Conversion ADU Cost in Southern California (and What Drives It)

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Lake Forest ADU FAQ

How many ADU builders serve Lake Forest?

Our directory lists 60 ADU builders and contractors that appear for Lake Forest on Google Maps, including companies based in nearby Orange County communities.

Do I need a permit to build an ADU in Lake Forest?

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

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 Lake Forest 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 53Newport Beach 96Buena Park 52
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