ADU & Guest Houses in
Flagler Beach, FL
Detached and attached accessory dwelling units designed and built as one project.
ADU & Guest Houses in Flagler Beach, Flagler County
ADU and guest house construction is surging in Flagler Beach as homeowners discover the financial and lifestyle benefits of adding a second dwelling to their property. With 1960s-1990s beach cottages and older CBS homes alongside newer coastal construction across Flagler Beach beachside, Beverly Beach, Painters Hill, and the Hammock area, Flagler Beach offers diverse ADU opportunities — from detached backyard cottages to garage-top apartments to attached in-law suites. City of Flagler Beach and Flagler County have different ADU regulations depending on whether the property is in city or county jurisdiction. Coastal construction setback lines (CCCL) affect beachside properties. Flood zone requirements (many properties are in VE or AE zones) significantly impact ADU design and cost. Wilson & Co designs and builds ADUs that complement your main home's architecture, not prefab boxes dropped in the backyard.
We've built elevated beach cottages, carriage houses behind beachside homes, and guest suites in the Hammock area. Every ADU project starts with a thorough site and zoning analysis — not every lot qualifies, and we tell you upfront before you invest in design. In Flagler County, ADU permitting involves building, electrical, plumbing, and mechanical approvals, plus sewer/septic capacity verification. For detached units, we handle foundation, framing, roofing, independent HVAC, electrical panel, plumbing, and all interior finishes. Jay designs each ADU to match your main home's rooflines, materials, and proportions — because a well-designed ADU adds value, while a cheap-looking one hurts it. Small-town beach community with approximately 6,000 residents and strong demand from buyers seeking authentic coastal living — and ADUs are increasingly seen as smart investments for rental income, multi-generational living, or future resale value.
Our ADU & Guest Houses Services
Accessory dwelling units are the smartest investment in Northeast Florida real estate right now. Whether you need a detached guest house, a garage-top apartment, an in-law cottage, or a backyard studio, Wilson & Co designs and builds ADUs as complete, permitted, livable spaces — not glorified sheds. Jay Wilson brings a designer's eye to every ADU: these aren't afterthoughts bolted onto your property, they're thoughtfully designed structures that complement your main home and add serious value. As a design-build firm, we handle architecture, engineering, permitting, utilities, and construction under one contract. Founder & Design Builder · License #CGC1532295 · AK Rising.
What's Included
- Detached guest houses and backyard cottages (400-1,200 sq ft)
- Garage conversions and garage-top apartments
- Attached in-law suites with private entrance
- Full kitchens, bathrooms, and laundry in compact layouts
- Impact-resistant windows and hurricane-rated construction
- Independent HVAC, electrical, and plumbing systems
- Custom architectural design matching your main home
- Zoning research and setback analysis before design begins
- Site planning for utilities, drainage, and access
- Rental-ready finishes for income-producing ADUs
Our Process
- Site & Zoning Review: We evaluate your lot for setbacks, impervious surface limits, utility access, flood zone status, and HOA restrictions. Not every lot qualifies for a detached ADU — we tell you upfront before you spend money on design.
- Design: Jay designs your ADU to complement your main home's architecture — matching rooflines, materials, and proportions. We produce full architectural plans, 3D renderings, and interior layouts optimized for the unit's footprint.
- Permitting: ADU permitting in Florida involves building, electrical, plumbing, mechanical, and sometimes septic/sewer approvals. We prepare and submit all applications and coordinate with St. Johns, Duval, or Flagler county building departments.
- Construction: Our crew builds the ADU from foundation to finishes. For detached units, we handle site prep, foundation, framing, roofing, utilities, and all interior buildout. Timeline is typically faster than main-home construction because we're working on a clean site.
- Completion & Inspection: Final inspections, CO (Certificate of Occupancy), utility activation, and walkthrough. Your ADU is move-in ready with all systems tested and operational.
ADU & Guest Houses FAQ for Flagler Beach Homeowners
How much does an ADU cost to build in Flagler Beach?
ADU costs in Flagler Beach typically range from $150-$350 per square foot. A 500 sq ft studio cottage runs $75,000-$125,000; a 1,000 sq ft one-bedroom guest house with full kitchen costs $150,000-$300,000. Beachside lots are smaller but valuable; inland lots along A1A offer more space; the Hammock area provides wooded privacy with coastal proximity. Site conditions (utilities distance, soil, drainage) significantly affect cost. We provide detailed estimates after our site review.
Can I build an ADU on my property in Flagler County?
City of Flagler Beach and Flagler County have different ADU regulations depending on whether the property is in city or county jurisdiction. Coastal construction setback lines (CCCL) affect beachside properties. Flood zone requirements (many properties are in VE or AE zones) significantly impact ADU design and cost. Not every lot qualifies — we research your specific property's zoning, setbacks, impervious surface limits, and utility capacity before design begins. This analysis is the first step in every ADU project we take on.
How long does it take to build an ADU in Flagler Beach?
ADU construction in Flagler Beach typically takes 3-6 months after permits are issued. Permitting in Flagler County runs 4-10 weeks depending on complexity. Garage conversions are faster (2-3 months construction). Detached units with new foundations and independent utility connections take longer. Total timeline from first meeting to move-in: 6-10 months.
General ADU & Guest Houses Questions
How much does an ADU cost to build in Northeast Florida?
ADU costs typically range from $150-$350 per square foot depending on size, finishes, and site conditions. A 500 sq ft studio cottage might cost $75,000-$125,000. A 1,000 sq ft one-bedroom guest house with full kitchen runs $150,000-$300,000. Detached units with independent utilities cost more than garage conversions. We provide detailed estimates after our site review.
Does my property qualify for an ADU in St. Johns County?
ADU eligibility depends on your zoning district, lot size, setback requirements, and impervious surface ratio. St. Johns County allows ADUs in many residential zones but has specific requirements for size, height, parking, and owner-occupancy. We research your specific property before design begins and advise you on what's permitted.
Can I rent out my ADU?
In many St. Johns and Duval County zones, yes — but regulations vary by district. Some areas require owner-occupancy of either the main house or the ADU. Short-term rental rules (Airbnb/VRBO) differ from long-term rental rules. We help you understand the rental regulations for your specific property before you invest.
How long does it take to build an ADU?
Typical ADU construction takes 3-6 months after permitting. Permitting itself can take 4-10 weeks depending on the county and complexity. Garage conversions are faster (2-3 months construction). Detached units with new foundations and independent utilities take longer. We provide a detailed timeline during the design phase.
Will an ADU increase my property value?
Yes. A permitted, appraised ADU typically adds 20-30% to property value in Northeast Florida markets — often more than the construction cost. The key is building a permitted, code-compliant structure with its own Certificate of Occupancy, not an unpermitted conversion that creates liability and appraisal issues.
Zip Codes We Serve in Flagler Beach
We provide adu & guest houses services in the following Flagler Beach zip codes: 32136.
Flagler Beach Neighborhoods We Serve
- Oceanfront Flagler: Beachfront properties along A1A seeking coastal-inspired kitchen and bathroom renovations with durable, salt-air resistant materials.
- Intracoastal: Waterfront homes along the Intracoastal Waterway seeking dock-side additions and water-view kitchen designs.