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ADU Builders & Contractors in Riverdale, CA

Building an ADU in Riverdale? You'll find 3 licensed contractors in the area, ready to help. Riverdale's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for Riverdale

Avg. Cost/sqft

$192-$367

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 3 ADU Contractors in Riverdale

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#1CASEY JON CONSTRUCTION INC

Riverdale, CA

Casey Jon Construction Inc — licensed ADU contractor in Riverdale, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (559) 867 4121
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#2CASEY BROS CUSTOM HOMES LLC

Riverdale, CA

Casey Bros Custom Homes Llc — licensed ADU contractor in Riverdale, CA. Detached ADU construction.

View Profile📞 (559) 867 4276
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#3CAMACHO CONSTRUCTION

Riverdale, CA

Camacho Construction — licensed ADU contractor in Riverdale, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (559) 217 4006

💰 How Much Does an ADU Cost in Riverdale?

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 Riverdale contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Riverdale

How much does it cost to build an ADU in Riverdale?▼
The average cost to build an ADU in Riverdale 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 Riverdale?▼
The ADU permit process in Riverdale 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 Riverdale?▼
In Riverdale, 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 Riverdale?▼
Riverdale 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 Riverdale?▼
No parking is required for ADUs in Riverdale 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

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

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