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ADU Builders in Riverside, CA

54 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 Riverside 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 Riverside County, Riverside had a 2020 Census population of about 314,998. We found 54 ADU builders and contractors that show up for Riverside homeowners on Google Maps, 21 of them based in the city itself. Their average Google rating is 4.9 stars. 13 market themselves specifically as ADU builders, and 1 mention garage conversions. 29 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are M.L. Construction, Better World Remodeling Inc. and Storm Guard Construction Inc..

Inland lots in Riverside County tend to be larger, which suits detached ADUs and multigenerational layouts. Summer heat makes insulation, roof design and HVAC sizing worth discussing with your builder.

#7

J.Peace Builders Inc

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

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

Serves Riverside · based in San Bernardino
General contractor
CallWebsiteView profile
#9

Straight Edge Builders

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

301 9th St, Redlands, CA 92374

Serves Riverside · based in Redlands
Garage conversionsRemodels & additionsGeneral contractor
CallWebsiteView profile
#13

AMS So Cal Builders

5.0 (13 Google reviews)
✔ CSLB License Verified #1060821

Service-area business · Riverside

Serves Riverside · based in Riverside
Remodels & additionsGeneral contractor
CallWebsiteView profile
#17

JJ.Builders

5.0 (11 Google reviews)
✔ CSLB License Verified #1157031

Service-area business · Norco

Serves Riverside · based in Norco
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#35

RAW Construction & Design

5.0 (2 Google reviews)
✔ CSLB License Verified #1047610

9195 Peoria Ln, Moreno Valley, CA 92557

Serves Riverside · based in Moreno Valley
Home builderGeneral contractor
CallView profile
#37

R&R Improvements

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

16226 Windcrest Dr, Fontana, CA 92337

Serves Riverside · based in Fontana
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#45

ADU Makers

No rating yet (0 Google reviews)
✔ CSLB License Verified #1104137

3400 La Sierra Ave, Riverside, CA 92503

Based in Riverside
ADU specialist
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#46

Hidden Peak Homes

No rating yet (0 Google reviews)

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

Serves Riverside · based in San Bernardino
Home builderGeneral contractor
CallView profile
#48

New ADU Home

No rating yet (0 Google reviews)

1702 Kippy Dr, Colton, CA 92324

Serves Riverside · based in Colton
ADU specialist
View profile
#49

Rocket ADU Solutions

No rating yet (0 Google reviews)

1881 Commercenter E #138, San Bernardino, CA 92408

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

Riverside ADU programs and pre-approved plans

Links verified November 2026. Program details change, so confirm current status with the city. See all SoCal pre-approved ADU plan programs.

Planning an ADU in Riverside? Start here

How to Legalize an Unpermitted ADU in California (AB 2533)Two-Story and Above-Garage ADUs in California: Height Rules, Costs and DesignAB 1033: Can You Sell an ADU Separately in California?ADU Rental Income and Property Taxes in California: What to Expect

All ADU guides →

Riverside ADU FAQ

How many ADU builders serve Riverside?

Our directory lists 54 ADU builders and contractors that appear for Riverside on Google Maps, including companies based in nearby Riverside County communities.

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

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

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 Riverside 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 Riverside County

Moreno Valley 8Corona 32Murrieta 32Temecula 30Jurupa Valley 43Menifee 19Hemet 13Indio 4Perris 65Lake Elsinore 20Eastvale 26San Jacinto 11
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