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ADU Builders & Contractors in Rialto, CA

Rialto, CA is home to 90 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Rialto's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Rialto

Avg. Cost/sqft

$192-$367

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 90 ADU Contractors in Rialto

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#1ALTERNATIVE CONSTRUCTION INC

Rialto, CA

Alternative Construction Inc — licensed ADU contractor in Rialto, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (909) 258 2785
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#2ENOCH CONSTRUCTION AND PARTNERS

Rialto, CA

Enoch Construction And Partners — licensed ADU contractor in Rialto, CA. Detached ADU construction.

View Profile📞 (909) 927 7060
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#3ASPIRE COMMUNICATIONS DEVELOPERS LLC

Rialto, CA

Aspire Communications Developers Llc — licensed ADU contractor in Rialto, CA. Detached ADU construction.

View Profile📞 (951) 818 3880
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#4GABY'S CONSTRUCTION

Rialto, CA

Gaby'S Construction — licensed ADU contractor in Rialto, CA. Detached ADU construction. 29+ years experience.

View Profile📞 (909) 265 5799
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#5FISCHER JAMES ROBERT

Rialto, CA

Fischer James Robert — licensed ADU contractor in Rialto, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (909) 816 0629
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#6J V GENERAL CONTRACTOR

Rialto, CA

J V General Contractor — licensed ADU contractor in Rialto, CA. Detached ADU construction. 28+ years experience.

View Profile📞 (916) 275 8444
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#7RESCUE ELECTRIC & CONSTRUCTION INC

Rialto, CA

Rescue Electric & Construction Inc — licensed ADU contractor in Rialto, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (909) 376 4414
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#8INTERNATIONAL QUALITY BUILDERS LLC

Rialto, CA

International Quality Builders Llc — licensed ADU contractor in Rialto, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (909) 214 1751
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#9INFINITY PRIME CONSTRUCTION

Rialto, CA

Infinity Prime Construction — licensed ADU contractor in Rialto, CA. Detached ADU construction.

View Profile📞 (951) 250 2948
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#10ORTIZ HIPOLITO JAVIER

Rialto, CA

Ortiz Hipolito Javier — licensed ADU contractor in Rialto, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (562) 577 2462
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💰 How Much Does an ADU Cost in Rialto?

Garage Conversion

$66,000 - $126,000

Converting existing garage to living space

Detached ADU

$142,000 - $317,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,105 - $5,105

Plan check, permits, utility connections

* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple Rialto contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Rialto

How much does it cost to build an ADU in Rialto?▼
The average cost to build an ADU in Rialto ranges from $142,000 to $317,000, or approximately $192 to $367 per square foot. Garage conversions typically cost $66,000 to $126,000.
How long does it take to get an ADU permit in Rialto?▼
The ADU permit process in Rialto typically takes 60 to 120 weeks. California law requires cities to approve or deny ADU permits within 60 days of receiving a complete application.
What are the ADU size limits in Rialto?▼
In Rialto, detached ADUs can be up to 1200 square feet. Attached ADUs are limited to 50% of the primary dwelling or 1,200 sqft, whichever is less. Junior ADUs (JADUs) are limited to 500 sqft and must be within the existing home.
What is the setback requirement for ADUs in Rialto?▼
Rialto requires 4-foot setbacks from side property lines and 4-foot setbacks from rear property lines for new ADU construction. Converted structures (like existing garages) may maintain their current setbacks.
Do I need to provide parking for my ADU in Rialto?▼
No parking is required for ADUs in Rialto if your property is within half a mile of public transit, in a historic district, part of an existing multi-family building, or if the ADU is a garage conversion. Otherwise, one space may be required.

Also See ADU Contractors In

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