ADU Builders & Contractors in Alpine, CA

With 111 verified ADU contractors serving Alpine, CA, homeowners have plenty of options for their accessory dwelling unit project. Local contractors ready to help specialize in everything from design-build to permit navigation.

📊 ADU Quick Facts for Alpine

Avg. Cost/sqft

$195-$370

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 111 ADU Contractors in Alpine

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Alpine, CA

Kta Construction Company — licensed ADU contractor in Alpine, CA. Detached ADU construction. 48+ years experience.

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Alpine, CA

Bucher Cameron General Construction — licensed ADU contractor in Alpine, CA. Detached ADU construction. 6+ years experience.

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Alpine, CA

Ras Construction & Plumbing Inc — licensed ADU contractor in Alpine, CA. Detached ADU construction. 13+ years experience.

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Alpine, CA

Northcutt & Company Inc — licensed ADU contractor in Alpine, CA. Detached ADU construction. 9+ years experience.

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Alpine, CA

Baker James Construction Company — licensed ADU contractor in Alpine, CA. Detached ADU construction. 43+ years experience.

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Alpine, CA

Billtwell Construction — licensed ADU contractor in Alpine, CA. Detached ADU construction.

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Alpine, CA

Gaytan Construction — licensed ADU contractor in Alpine, CA. Detached ADU construction. 6+ years experience.

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Alpine, CA

Nyx Construction Services — licensed ADU contractor in Alpine, CA. Detached ADU construction.

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Alpine, CA

Rjs General Builders — licensed ADU contractor in Alpine, CA. Detached ADU construction. 8+ years experience.

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Alpine, CA

Lazaro Construction — licensed ADU contractor in Alpine, CA. Detached ADU construction. 5+ years experience.

💰 How Much Does an ADU Cost in Alpine?

Garage Conversion

$67,500 - $127,500

Converting existing garage to living space

Detached ADU

$145,000 - $320,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,108 - $5,108

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Alpine

How much does it cost to build an ADU in Alpine?
The average cost to build an ADU in Alpine ranges from $145,000 to $320,000, or approximately $195 to $370 per square foot. Garage conversions typically cost $67,500 to $127,500.
How long does it take to get an ADU permit in Alpine?
The ADU permit process in Alpine 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 Alpine?
In Alpine, 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 Alpine?
Alpine 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 Alpine?
No parking is required for ADUs in Alpine 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.

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