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ADU Builders in Colton, CA

31 builders · ranked by Google rating and review volume · 12 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 Colton 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 San Bernardino County, Colton had a 2020 Census population of about 53,909. We found 31 ADU builders and contractors that show up for Colton homeowners on Google Maps, 1 of them based in the city itself. Their average Google rating is 4.9 stars. 12 market themselves specifically as ADU builders, and 1 mention garage conversions. 12 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are M.L. Construction, MDT, Inc and Good Neighbor Construction.

Lots across San Bernardino County are often larger and land costs lower, which makes detached and prefab ADUs attractive. Foothill and mountain areas can face wildfire-zone construction requirements.

#2

MDT, Inc

5.0 (32 Google reviews)

6744 Magnolia Ave, Riverside, CA 92506

Serves Colton · based in Riverside
Remodels & additionsGeneral contractor
CallWebsiteView profile
#4

J.Peace Builders Inc

5.0 (24 Google reviews)
✔ CSLB License Verified #1073588

414 E Rialto Ave STE B, San Bernardino, CA 92408

Serves Colton · based in San Bernardino
General contractor
CallWebsiteView profile
#6

Straight Edge Builders

4.9 (48 Google reviews)
✔ CSLB License Verified #1075936

301 9th St, Redlands, CA 92374

Serves Colton · based in Redlands
Garage conversionsRemodels & additionsGeneral contractor
CallWebsiteView profile
#12

H5 Construction

4.8 (26 Google reviews)
✔ CSLB License Verified #1047863

1355 Spruce St W, San Bernardino, CA 92411

Serves Colton · based in San Bernardino
Remodels & additionsGeneral contractor
CallWebsiteView profile
#22

USModular, Inc.

4.6 (39 Google reviews)

579 W County Line Rd, Calimesa, CA 92320

Serves Colton · based in Calimesa
ADU specialistPrefab / modularHome builderGeneral contractor
CallWebsiteView profile
#23

R&R Improvements

4.6 (10 Google reviews)
✔ CSLB License Verified #1087664

16226 Windcrest Dr, Fontana, CA 92337

Serves Colton · based in Fontana
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#28

Hidden Peak Homes

No rating yet (0 Google reviews)

473 E Carnegie Dr #200, San Bernardino, CA 92408

Serves Colton · based in San Bernardino
Home builderGeneral contractor
CallView profile
#30

New ADU Home

No rating yet (0 Google reviews)

1702 Kippy Dr, Colton, CA 92324

Based in Colton
ADU specialist
View profile
#31

Rocket ADU Solutions

No rating yet (0 Google reviews)

1881 Commercenter E #138, San Bernardino, CA 92408

Serves Colton · based in San Bernardino
ADU specialistPrefab / modular
CallView profile

Permits and pre-approved plans in Colton

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

Planning an ADU in Colton? Start here

ADU Rental Income and Property Taxes in California: What to ExpectHow to Choose an ADU Builder in Southern California: 15-Point ChecklistSB 9 vs ADU: Lot Splits, Duplexes and Backyard Units in CaliforniaPrefab and Modular ADUs in California: Real Costs, Permits and Pitfalls

All ADU guides →

Colton ADU FAQ

How many ADU builders serve Colton?

Our directory lists 31 ADU builders and contractors that appear for Colton on Google Maps, including companies based in nearby San Bernardino County communities.

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

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

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 Colton 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 Bernardino County

San Bernardino 51Fontana 83Ontario 54Rancho Cucamonga 31Victorville 16Rialto 56Hesperia 18Chino 49Upland 27Chino Hills 117Apple Valley 17Redlands 20
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