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ADU Builders in San Jacinto, CA

11 builders · ranked by Google rating and review volume · 5 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 San Jacinto 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 53,898 residents at the 2020 Census, San Jacinto is one of Riverside County's established communities. We found 11 ADU builders and contractors that show up for San Jacinto homeowners on Google Maps, most of them based in nearby communities. Their average Google rating is 4.8 stars. 1 market themselves specifically as ADU builders, and 1 mention garage conversions. 5 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are JMAR BUILDERS INC., Baja Construction and Gold Ladder Construction.

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.

#2

Baja Construction

5.0 (22 Google reviews)
✔ CSLB License Verified #1146300

Service-area business · Hemet

Serves San Jacinto · based in Hemet
Garage conversionsRemodels & additionsGeneral contractor
CallWebsiteView profile
#5

Crissinger Construction

5.0 (1 Google reviews)
✔ CSLB License Verified #871224

Service-area business · San Jacinto

Serves San Jacinto · based in San Jacinto
General contractor
CallView profile
#7

PROJECT X

No rating yet (0 Google reviews)
✔ CSLB License Verified #1159729

Service-area business · San Jacinto

Serves San Jacinto · based in San Jacinto
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile

Permits and pre-approved plans in San Jacinto

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

Planning an ADU in San Jacinto? Start here

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San Jacinto ADU FAQ

How many ADU builders serve San Jacinto?

Our directory lists 11 ADU builders and contractors that appear for San Jacinto on Google Maps, including companies based in nearby Riverside County communities.

Do I need a permit to build an ADU in San Jacinto?

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

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 San Jacinto 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

Riverside 54Moreno Valley 8Corona 32Murrieta 32Temecula 30Jurupa Valley 43Menifee 19Hemet 13Indio 4Perris 65Lake Elsinore 20Eastvale 26
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