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ADU Builders & Contractors in Key West, FL

Key West, FL homeowners looking to build an ADU have 8 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 Key West starts here.

📊 ADU Quick Facts for Key West

Avg. Cost/sqft

$155-$305

Permit Timeline

30-90 weeks

Max Size

1000 sqft

Setbacks

5ft sides

Top 8 ADU Contractors in Key West

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#1Florida Keys Contractors LLC

Key West, FL

Florida Keys Contractors LLC — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 304-2142
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#2Taro Construction

Key West, FL

Taro Construction — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 744-4778
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#3R E REECE P A

Key West, FL

R E Reece P A — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 723-9996
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#4KEYS TO DO, LLC

Key West, FL

Keys TO DO, Llc — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 240-6130
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#5Island Elevations House Lifting and Foundations LLC

Key West, FL

Island Elevations House Lifting and Foundations LLC — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 848-8000
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#6Samantha Jones General Contractors Inc

Key West, FL

Samantha Jones General Contractors Inc — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 896-4677
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#7Raymond Charles Vanyo Sr, LLC

Key West, FL

Raymond Charles Vanyo Sr, LLC — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 797-2323
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#8Florida Keys Contractors LLC

Key West, FL

Florida Keys Contractors LLC — licensed ADU contractor in Key West, FL.

View Profile📞 (305) 304-2142

💰 How Much Does an ADU Cost in Key West?

Garage Conversion

$42,500 - $102,500

Converting existing garage to living space

Detached ADU

$105,000 - $255,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$601 - $3,101

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Key West

How much does it cost to build an ADU in Key West?▼
The average cost to build an ADU in Key West ranges from $105,000 to $255,000, or approximately $155 to $305 per square foot. Garage conversions typically cost $42,500 to $102,500.
How long does it take to get an ADU permit in Key West?▼
The ADU permit process in Key West typically takes 30 to 90 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 Key West?▼
In Key West, detached ADUs can be up to 1000 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 Key West?▼
Key West requires 5-foot setbacks from side property lines and 5-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 Key West?▼
No parking is required for ADUs in Key West 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

Miami (224)Tampa (223)Jacksonville (121)Orlando (117)Naples (110)Sarasota (103)Fort Myers (91)Cape Coral (83)

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