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ADU Builders & Contractors in Mount Hermon, CA

Mount Hermon, CA homeowners looking to build an ADU have 4 licensed contractors to choose from, ready to help. Whether you're planning a garage conversion, detached ADU, or junior ADU, finding the right contractor in Mount Hermon starts here.

📊 ADU Quick Facts for Mount Hermon

Avg. Cost/sqft

$207-$382

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 4 ADU Contractors in Mount Hermon

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#1RADONICH T J CONSTRUCTION

Mount Hermon, CA

Radonich T J Construction — licensed ADU contractor in Mount Hermon, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (408) 590 9310
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#2WILSON ERIK CONSTRUCTION

Mount Hermon, CA

Wilson Erik Construction — licensed ADU contractor in Mount Hermon, CA. Detached ADU construction. 31+ years experience.

View Profile📞 (831) 246 1223
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#3M SQUARED CONSTRUCTION

Mount Hermon, CA

M Squared Construction — licensed ADU contractor in Mount Hermon, CA. Detached ADU construction.

View Profile📞 (831) 400 9373
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#4BAY AREA CONTRACTOR

Mount Hermon, CA

Bay Area Contractor — licensed ADU contractor in Mount Hermon, CA. Detached ADU construction.

View Profile📞 (408) 728 2554

💰 How Much Does an ADU Cost in Mount Hermon?

Garage Conversion

$73,500 - $133,500

Converting existing garage to living space

Detached ADU

$157,000 - $332,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,111 - $5,111

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Mount Hermon

How much does it cost to build an ADU in Mount Hermon?▼
The average cost to build an ADU in Mount Hermon ranges from $157,000 to $332,000, or approximately $207 to $382 per square foot. Garage conversions typically cost $73,500 to $133,500.
How long does it take to get an ADU permit in Mount Hermon?▼
The ADU permit process in Mount Hermon 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 Mount Hermon?▼
In Mount Hermon, 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 Mount Hermon?▼
Mount Hermon 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 Mount Hermon?▼
No parking is required for ADUs in Mount Hermon 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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