ADUs & Guest Houses in St. Augustine, Florida
Accessory dwelling units, in-law suites, and detached guest houses.
About ADUs & Guest Houses in St. Augustine
St. Augustine's tourism economy and growing remote-work population make ADUs one of the smartest investments a homeowner can make. Whether you need a guest house for visiting family, a rental unit for supplemental income, or a home office separate from your main living space, Wilson & Co designs and builds ADUs that comply with St. Johns County's evolving regulations and maximize your property's potential.
St. Johns County has updated its ADU regulations in recent years, expanding where ADUs are permitted and adjusting size and setback requirements. Many homeowners in established St. Augustine neighborhoods have the lot size for a detached guest house but don't realize it. We research your specific parcel's zoning and buildable area before design.
What's Included
- Detached guest houses and cottages (up to 1,000+ sq ft)
- Garage-to-living-space conversions
- Attached in-law suites with separate entrance
- Full kitchen and bathroom installations
- Independent HVAC systems for separate climate control
- Separate electrical panels and utility metering options
- ADA-accessible design for aging-in-place applications
- Matching architectural style to primary residence
- Site planning for setbacks, drainage, and parking requirements
- Impact-rated windows and doors for Florida code compliance
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Our ADUs & Guest Houses Process in St. Augustine
Feasibility
We research your lot's zoning, setbacks, utility access, and local ADU regulations before design begins.
Design
Architectural plans optimized for your lot, including floor plan, elevations, and material selections.
Permitting
We submit to the county and coordinate impact fees, utility connections, and inspections.
Construction
Ground-up build including foundation, framing, MEP, exterior, and interior finishes.
Completion
Final inspections, certificate of occupancy, and turnover.
ADUs & Guest Houses in St. Augustine — FAQ
Are ADUs allowed on my St. Augustine property?
Most residential lots in St. Johns County now allow ADUs with specific conditions. We research your parcel's zoning, setbacks, and lot coverage limits to confirm before design.
How much does an ADU cost in St. Augustine?
Detached ADUs in St. Augustine typically cost $150-$275 per square foot. A 600 sq ft guest house runs $90,000-$165,000. Garage conversions run $50,000-$90,000.
Can I short-term rent my St. Augustine ADU?
Short-term rental regulations vary by zone in St. Johns County. Some areas allow it; others restrict rentals to 30+ day terms. We advise checking current county regulations for your specific area.
ADUs & Guest Houses in Nearby Areas
Ready for ADUs & Guest Houses in St. Augustine?
Contact Wilson & Co Design Build today for a free consultation and detailed quote.