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ADU & Guest House Cost in South Florida 2026: Complete Boca Raton & Miami Guide

Updated: Jun 23

Photo by GregoryButler via Pixabay

INDEX

  1. Hire an ADU Contractor

  2. ADU vs Guest House

  3. ADU Cost Ranges

  4. Guest House Cost Ranges

  5. Zoning Verification First

  6. Boca Raton ADU Coordination

  7. Miami ADU Coordination

  8. ADU Construction Scope

  9. Guest House Construction Scope

  10. Endless Life Design ADU & Guest House Services

  11. Authoritative References & Code Resources

  12. Related Endless Life Design Resources





Hire an ADU Contractor

If you are planning a Miami-Dade, Broward, or Palm Beach County ADU (accessory dwelling unit) or guest house, hire a Florida-licensed general contractor with established ADU and guest house expertise. ADU and guest house construction throughout South Florida supports multi-generational residential, guest accommodation, rental income generation, and residential expansion. Common ADU and guest house categories include attached ADU integrated with primary residence, detached ADU supporting independent ADU structure, garage conversion ADU supporting existing garage transformation, guest house supporting dedicated guest accommodation, and ADU and guest house scope.





ADU vs Guest House

ADU versus guest house distinction reflects regulatory and functional categorization. ADU (accessory dwelling unit) represents independent dwelling with integrated kitchen, bathroom, and sleeping area supporting independent residential occupancy and potential rental income generation under applicable municipal ADU ordinance. Guest house represents accommodation supporting guest stays without independent kitchen typically supporting guest accommodation without independent rental potential. Both ADU and guest house support residential expansion and integrated luxury character.





ADU Cost Ranges

ADU cost ranges vary by ADU type, size, and luxury finish level. Typical ADU cost ranges include $100,000-200,000 for garage conversion ADU 400-700 square feet supporting cost-effective ADU through existing garage transformation, $200,000-400,000 for attached ADU 600-1,000 square feet integrated with primary residence, $300,000-600,000 for detached ADU 800-1,200 square feet supporting independent ADU structure, $500,000-1,000,000+ for luxury detached ADU 1,000-2,000+ square feet supporting luxury guest accommodation with premium finishes. Cost planning supports realistic ADU planning.





Guest House Cost Ranges

Guest house cost ranges vary by guest house size and luxury finish level. Typical guest house cost ranges include $200,000-400,000 for guest house 600-1,000 square feet supporting comfortable guest accommodation with luxury finishes, $400,000-800,000 for luxury guest house 1,000-1,500 square feet supporting luxury guest accommodation with premium finishes, $800,000-1,500,000+ for ultra-luxury guest house 1,500-2,500+ square feet supporting premier luxury guest accommodation. Pre-design coordination supports accurate guest house planning throughout luxury residential.





Zoning Verification First

Zoning verification before ADU or guest house investment is essential supporting feasibility verification. Required scope includes property zoning verification supporting permitted ADU under applicable zoning (Miami-Dade Code Chapter 33 ADU provisions allow ADU throughout Miami-Dade unincorporated geography under recent zoning code modernization, Broward County and Palm Beach County have variable ADU provisions across municipalities), dimensional standards compliance supporting setback and lot coverage, parking compliance supporting ADU and primary residence parking, integration with conditional use approval where applicable, and zoning verification scope.





Boca Raton ADU Coordination

Boca Raton ADU coordination through City of Boca Raton Building Department at 201 W Palmetto Park Road typically includes ADU permit application, contractor licensure documentation, signed plans where applicable, ADU design supporting Mediterranean Revival residential aesthetic where applicable in luxury neighborhoods, ADU dimensional standards compliance, ADU parking compliance, integration with Boca Raton landscape character, integration with Royal Palm Yacht & Country Club aesthetic where applicable, and Boca Raton ADU permit scope. Quality coordination supports successful Boca Raton ADU construction.





Miami ADU Coordination

Miami ADU coordination through City of Miami Building Department at Riverside Center at 444 SW 2 Avenue typically includes ADU permit application, contractor licensure documentation, signed plans where applicable, ADU design supporting Miami 21 Zoning Code Transect compliance (Miami 21 supports ADU throughout T3 Sub-Urban supporting single-family residential), integration with Miami HEP historic preservation where applicable in historic districts, integration with Miami tree canopy preservation, integration with Miami-Dade DERM coordination where applicable, and Miami ADU permit scope.





ADU Construction Scope

ADU construction scope supports comprehensive independent ADU dwelling including integrated kitchen supporting independent ADU cooking (typical full kitchen with cabinets, countertops, refrigerator, range, sink, dishwasher), integrated bathroom supporting independent ADU bathroom, integrated sleeping area supporting independent ADU sleeping accommodation, integrated living area supporting ADU lifestyle, integrated independent HVAC supporting separate ADU climate control, integrated independent electrical service supporting separate ADU electrical metering where applicable, integrated independent plumbing supporting separate ADU plumbing systems, and ADU construction scope.





Guest House Construction Scope

Guest house construction scope supports comprehensive luxury guest accommodation including integrated sleeping area supporting comfortable guest accommodation, integrated luxury bathroom supporting guest bathing comfort, integrated sitting area supporting guest relaxation, integrated coffee bar or beverage area supporting guest convenience (without full kitchen distinguishing guest house from ADU), integrated luxury finishes supporting luxury guest experience, integrated independent HVAC supporting separate guest house climate control, integration with main residence supporting integrated luxury character, integration with luxury landscape, and guest house construction scope.





Endless Life Design ADU & Guest House Services

Endless Life Design manages the entire government permit process for construction projects across Miami-Dade, Broward, and Palm Beach counties. Our Government Permit Processing Service handles your application, plan review, and final approval for a flat $4,500 — call (305) 680-3283 to get started.




Request your free consultation today. If you need a licensed general contractor in Miami-Dade, Broward, or Palm Beach County for ADU construction including attached, detached, or garage conversion ADU, luxury guest house construction, comprehensive zoning verification, comprehensive municipal Building Department permit coordination, integrated luxury finishes, integration with main residence, or comprehensive ADU and guest house services, Endless Life Design delivers integrated licensed general contracting, design, engineering, and permit expediting services. Get a free quote, request a project assessment, or schedule a consultation by visiting endlesslifedesign.com, calling (305) 680-3283, or emailing endlesslifedesign@endlesslifedesign.com.





Authoritative References & Code Resources


For verification of the code requirements, permit standards, Florida Building Code sections, and regulatory citations referenced in this article, consult the following authoritative government and code sources:


Florida Building Code 8th Edition (2023) on ICC Digital Codes: Building | Residential | Existing Building | Mechanical | Plumbing | Accessibility.








The Meter Question the Second Dwelling Raises

The cottage's utilities need a philosophy, with the shared meters keeping costs simple while complicating any future rental accounting, the separate services adding connection fees and panel work while creating a cleanly billable unit, and the choice made for the use the owner actually intends, the infrastructure matched to the plan, the guest house served by utilities that were decided rather than defaulted.


The guest house is served by utilities that were decided rather than defaulted. Endless Life Design prices both metering paths before the trenching. Call (305) 680-3283 for service designed to the intended use. Separate meters add connection fees and panel work but create a cleanly billable unit for future rentals.




The Parking Space the Ordinance May Demand

The new unit can come with a parking bill, with many ordinances requiring an additional on-site space when a second dwelling appears, the driveway geometry, landscape rules, and impervious limits all negotiating where that space can legally exist, and the requirement confirmed before the site plan promises a garden where a car must go, the parking solved on paper first, the cottage approved with its vehicle accounted for.


The cottage is approved with its vehicle accounted for. Endless Life Design resolves the parking math second dwellings trigger. Call (305) 680-3283 for site plans that fit the required space. Driveway geometry and impervious limits negotiate where that space can legally go.




The Lease the Zoning Allows After the Build

The rental plans deserve a legal reading, with the zoning's long-term lease permissions and the separate short-stay restrictions often pointing in different directions for the same cottage, the income assumptions tested against the rules the address actually carries, and the investment underwritten on lawful use rather than listing-site optimism, the unit built for the tenancy it may genuinely hold, the income real because the lease was legal.


The income is real because the lease was legal. Endless Life Design verifies the rental rules before guest houses are financed on them. Call (305) 680-3283 for units built on lawful assumptions.




Related Endless Life Design Resources


Browse our complete portfolio of licensed construction, engineering, architecture, 3D rendering, and permit expediting services across Miami-Dade, Broward, and Palm Beach counties: Construction Services | Commercial Construction Projects | Residential Construction Projects | Royal Palace Projects.


Endless Life Design | Licensed General Contractor and South Florida ADU & Guest House Services | Miami-Dade, Broward, and Palm Beach County | (305) 680-3283 | endlesslifedesign@endlesslifedesign.com | endlesslifedesign.com


Related Permit Resources

Endless Life Design handles construction, renovation, and permitting across Miami-Dade, Broward, and Palm Beach. Book a consultation or call (305) 680-3283 for a custom quote, and explore our project portfolio for the Royal Custom Construction standard. We also handle full permit processing.

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Endless Life Design — Full-Service Construction in Miami

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Endless Life Design is a Miami-based custom construction company providing complete residential and commercial building services across South Florida. Our trades include licensed plumbing services for new construction, remodels, and repairs throughout Miami-Dade and Broward. We offer professional electrical contractor services covering wiring, panel upgrades, lighting, and code compliance. Our HVAC services include installation, repair, and maintenance of heating, cooling, and ventilation systems. We provide roofing services for residential and commercial properties, including new roofs, repairs, and inspections. Additional trades include carpentry, drywall, painting, tile, flooring, kitchen and bath remodeling, and custom millwork. Whether you need a single-trade specialist or a turnkey general contractor managing your entire project, Endless Life Design delivers licensed, insured, full-service construction across Miami.

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