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ADU Builders in Hesperia, CA

18 builders · ranked by Google rating and review volume · 8 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 Hesperia 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 99,818 residents at the 2020 Census, Hesperia is one of San Bernardino County's established communities. We found 18 ADU builders and contractors that show up for Hesperia homeowners on Google Maps, 2 of them based in the city itself. Their average Google rating is 4.8 stars. 1 market themselves specifically as ADU builders. 8 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are PA Design Associates, Silver Spur Construction, Inc. and Mystery Construction Inc.

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.

#3

Mystery Construction Inc

5.0 (18 Google reviews)
✔ CSLB License Verified #1062614

16805 Central Rd, Apple Valley, CA 92307

Serves Hesperia · based in Apple Valley
General contractor
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#8

Deserada Homes

4.7 (26 Google reviews)
✔ CSLB License Verified #514167

14800 Apple Valley Rd, Apple Valley, CA 92307

Serves Hesperia · based in Apple Valley
Home builder
CallWebsiteView profile

Permits and pre-approved plans in Hesperia

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

Planning an ADU in Hesperia? Start here

The ADU Permit Process in California: Step by Step (2026)Garage Conversion ADU Cost in Southern California (and What Drives It)AB 1033: Can You Sell an ADU Separately in California?How to Legalize an Unpermitted ADU in California (AB 2533)

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Hesperia ADU FAQ

How many ADU builders serve Hesperia?

Our directory lists 18 ADU builders and contractors that appear for Hesperia on Google Maps, including companies based in nearby San Bernardino County communities.

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

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

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 Hesperia 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 56Chino 49Upland 27Chino Hills 117Apple Valley 17Redlands 20Highland 8
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