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The average cost of ADU or tiny home permits and utility hookups in Florida is usually $10,000–$20,000 total, depending on your property setup. Here’s the breakdown most homeowners see:

• ADU permit fees: $3,000–$6,000 (aka the permit cost for an ADU in Florida)
• Utility hookup cost for an ADU or tiny house (water, sewer, electric): $6,000–$9,000 (covers ADU utility connection fees)
• Septic system costs: $7,000–$10,000 for a new or upgraded system (if required by the local Health Department).

Some builders leave permit fees and ADU utility hookups out of their quotes — leading to surprise charges of $10,000–$20,000 later. At Goshen Tiny Homes, we show these costs upfront and handle all permitting and utility coordination, so you get the full picture before construction begins.

👉 Want clarity on the permit cost for an ADU, ADU utility connection fees, septic costs, and the cost to connect an ADU to sewer and water? Schedule your free site review, and we’ll break down all expenses for your property before construction begins.

• ADU permit fees: $3,000–$6,000 (aka the permit cost for an ADU in Florida)
• Utility hookup cost for an ADU or tiny house (water, sewer, electric): $6,000–$9,000 (covers ADU utility connection fees)
• Septic system costs: $7,000–$10,000 for a new or upgraded system (if required by the local Health Department).

• Design and engineering plans
• Architecture and permits
• Full construction: concrete foundation, block walls, roofing, electrical, plumbing, HVAC
• Complete finishes: full bathroom, full kitchen, flooring, interior finishes, all appliances
• Utility hookups: water, sewer, electric.
• Final inspections and certificate of occupancy
• Warranty: 1-year workmanship warranty and 10-year structural warranty

• Home equity loans or HELOCs — borrow against your existing property value.
• Construction loans — designed for new home builds and ADUs.
• Cash-out refinancing — unlock equity in your current home.

With Goshen Tiny Homes, an Accessory Dwelling Unit (ADU) or tiny home can be built in several locations on your property, depending on setbacks and local zoning rules:

• Backyard: the most common spot for detached ADUs in Florida.
• Side yard: possible if there’s enough space within side yard setbacks.
• Attached addition: build an ADU as a front, side, or rear extension to your main home.
• Above a garage: a smart choice in urban areas with limited lot size.

Florida ADU placement rules vary by county, but Goshen handles zoning research upfront so you know your ADU setbacks and exact options before design begins.

👉 Want to know if you can build an ADU in your backyard? Schedule a free site review today, and we’ll confirm setbacks, zoning, and show you the best placement for your Goshen ADU.

• Site-built ADUs qualify as real property. They appraise like a home and add long-term equity.
• Prefab ADUs in Florida often face zoning restrictions. Many counties don’t allow them, and even when they’re installed, they usually don’t count as real estate.
• Prefab tiny homes can cost $100,000+ but still fail zoning approval, leaving homeowners with assets that don’t add value.

• Connect to the existing septic system (if it has enough capacity).
• Upgrade the existing septic system — usually $2,000–$5,000, sometimes up to $7,000 depending on complexity.
• Install a new septic system — typically $7,000–$10,000, and in some cases up to $15,000 depending on size and soil conditions.

• Equity boost: Adds livable square footage that often appraises higher per square foot than the main home.
• Rental income potential: An ADU can generate steady cash flow, often covering most or all of your mortgage.
• Buyer demand: Buyers (especially families and investors) pay a premium for homes with secondary units.
• Resale value: ADUs are considered a high-demand feature in Florida, increasing your property’s resale appeal.

• Long-term rentals (6+ months): Generally allowed across Florida if the ADU meets zoning and building standards.
• Zoning requirements: Rules differ by city and county, so exact rental allowances can vary.
• Owner occupancy: Some municipalities may require the property owner to live on-site if renting an ADU.
• Rental income potential: Many Florida homeowners legally rent their ADUs to offset or even cover their mortgage.

The size of an Accessory Dwelling Unit (ADU) in Florida depends on local zoning rules and the size of your main house. While each city and county is different, here are common ADU square footage limits in Florida:

• Typical range: Most ADUs fall between 400–800 sq. ft.
• Maximum size: Often between 650–1,000 sq. ft., or up to 80% of the main home’s size.
• Minimum size: To qualify as a legal dwelling, most counties require at least 200 sq. ft.

Most homeowners want to maximize square footage — and at Goshen Tiny Homes, we make sure your design gets every inch the code allows. We confirm exact zoning standards upfront so you know what’s possible before design or permitting.

👉 Curious about the maximum ADU size or tiny home square footage in Florida for your property? Schedule a free site review today and we’ll confirm your zoning limits before you invest in design.

• Tampa Bay Area: Tampa, St. Petersburg, Clearwater, Brandon, Largo, Riverview.
• South Florida: Miami, Fort Lauderdale, West Palm Beach, Boca Raton, Hollywood, Miramar, Coral Springs, Pompano Beach, Pembroke Pines.
• Southwest Florida: Sarasota, Bradenton, Fort Myers, Naples, North Port.
• Orlando Metro: Orlando, Kissimmee, Sanford, Winter Park, Apopka, Ocoee, Altamonte Springs, St. Cloud, Lakeland.
• Northeast Florida: Jacksonville, St. Augustine, Duval & St. Johns Counties

• Size limits: Typically 400–800 sq. ft., with maximums from 650–1,000 sq. ft. or up to 80% of the main home’s size.
• Setbacks: Rear setbacks are usually 5–20 feet; side setbacks are often 5–10 feet.
• Owner occupancy: Certain cities require the homeowner to live on-site if renting the ADU.
• Utilities & septic: If your property is on septic, the Health Department must approve capacity before permits are issued.

• Not prefab or kits: We don’t sell temporary, movable units. Prefab tiny homes often can’t pass zoning in Florida and usually aren’t considered real property.
• Custom design: Each ADU is tailored to your lot, with studio, one-bedroom, and two-bedroom layouts available.
• Competitive pricing: Our site-built ADUs are often priced the same or less than prefabs — but they qualify as real estate, so they add long-term value.
• Equity & rental potential: A Goshen ADU is a true home-quality investment that boosts your property value and generates rental income potential.

1. Free site review & consultation — we confirm setbacks, zoning, and utilities, and give you a preliminary estimate.
2. In-depth zoning research (and septic review if needed) — so you know feasibility before you sign a contract.
3. Design & architecture stage — floor plans, backyard layout, specs, and architectural drawings.
4. Permitting — our team prepares and submits all applications, coordinating with your city or county.
5. Construction — we block-build your ADU on a slab foundation, inspected at every stage.
6. Move-in ready delivery — includes final inspections, certificate of occupancy, and warranties.