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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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#1PRO PAINTING SERVICES INC

Rialto, CA

Pro Painting Services Inc — licensed ADU contractor in Rialto, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (909) 941 1010
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#2PRESTIGE INNOVATIVE HOME SOLUTIONS

Rialto, CA

Prestige Innovative Home Solutions — licensed ADU contractor in Rialto, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (951) 202 4614
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#3NEHEMIAH CONSTRUCTION

Rialto, CA

Nehemiah Construction — licensed ADU contractor in Rialto, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (909) 680 6265
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#4TARVER CHARLES L CONSTRUCTION & CONSULTANTS

Rialto, CA

Tarver Charles L Construction & Consultants — licensed ADU contractor in Rialto, CA. Detached ADU construction. 45+ years experience.

View Profile📞 (909) 376 4277
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#5BUDGET PAVING INC

Rialto, CA

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

View Profile📞 (714) 580 7149
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#6M ENERGY INC

Rialto, CA

M Energy Inc — licensed ADU contractor in Rialto, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (909) 615 3479
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#7JAI-CONS LLC

Rialto, CA

Jai-Cons Llc — licensed ADU contractor in Rialto, CA. Detached ADU construction.

View Profile📞 (909) 341 8325
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#8WONDERFUL POOLS & SPAS

Rialto, CA

Wonderful Pools & Spas — licensed ADU contractor in Rialto, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (951) 823 6829
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#9OMNI CONSTRUCTION SOLUTIONS

Rialto, CA

Omni Construction Solutions — licensed ADU contractor in Rialto, CA. Detached ADU construction.

View Profile📞 (562) 206 4857
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#10POWERS JOHN ROBERT

Rialto, CA

Powers John Robert — licensed ADU contractor in Rialto, CA. Detached ADU construction. 43+ years experience.

View Profile📞 (909) 874 5975
View All 90 Contractors →

💰 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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