ADU Builders & Contractors in Siesta Key, FL
Building an ADU in Siesta Key? You'll find 1 licensed contractors in the area, ready to help. Siesta Key's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.
📊 ADU Quick Facts for Siesta Key
Avg. Cost/sqft
$143-$293
Permit Timeline
30-90 weeks
Max Size
1000 sqft
Setbacks
5ft sides
Top 1 ADU Contractors in Siesta Key
🏗️
Siesta Key, FL
Shasta Development LLC — licensed ADU contractor in Siesta Key, FL.
💰 How Much Does an ADU Cost in Siesta Key?
Garage Conversion
$36,500 - $96,500
Converting existing garage to living space
Detached ADU
$93,000 - $243,000
New standalone unit (600-1,200 sqft)
Permit & Fees
$605 - $3,105
Plan check, permits, utility connections
* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple Siesta Key contractors to compare pricing.
❓ Frequently Asked Questions About ADUs in Siesta Key
How much does it cost to build an ADU in Siesta Key?▼
The average cost to build an ADU in Siesta Key ranges from $93,000 to $243,000, or approximately $143 to $293 per square foot. Garage conversions typically cost $36,500 to $96,500.
How long does it take to get an ADU permit in Siesta Key?▼
The ADU permit process in Siesta Key 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 Siesta Key?▼
In Siesta Key, 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 Siesta Key?▼
Siesta Key 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 Siesta Key?▼
No parking is required for ADUs in Siesta Key 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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