What Does It Cost to Build a House in South Florida?

New home construction cost

The short answer

The national benchmark

Where the money goes in a new house

The NAHB’s Cost of Constructing a Home survey is still the most detailed public breakdown. Its latest edition (published January 2025, from 2024 builder data) found that construction is 64.4% of a new home’s sales price and the finished lot 13.7%. The rest is financing, overhead, marketing, commission and profit. Inside the $428,215 construction cost, the split looks like this:

Two things in that chart matter for a South Florida budget. First, interior finishes (24.1%) and systems rough-ins (19.2%) are the largest shares, and they are where your own choices move the number most: cabinetry, flooring, fixtures, the number of bathrooms, and the HVAC and electrical specification. Second, site work (7.6%) already includes permit fees ($7,640 on average), impact fees ($6,367) and water and sewer fees and inspections ($6,260) nationally. Those are the lines that differ most from one South Florida address to the next, and the sections below show why.

For scale, the U.S. Census Bureau reports that the median new single-family house completed in 2025 was 2,142 sq ft, and the median contract price for a contractor-built house started that year was $404,000, not counting the lot.

The first South Florida line

Flood zone: how high the floor has to be

If the lot is mapped in a Special Flood Hazard Area, the Florida Building Code sets the height of the house before anything else is designed. In an A zone, section R322.2.1 of the Florida Building Code, Residential requires the lowest floor to be “elevated to or above the base flood elevation plus 1 foot … or the design flood elevation, whichever is higher.” In a V zone or Coastal A zone (R322.3.2), the same line applies to the bottom of the lowest horizontal structural member, so the house stands on piles or columns with the space below left open.

What that costs depends on how far the finished floor sits above the natural ground: more fill and taller stem walls, or a pile foundation, stairs and ramps up to the entry, and taller utility risers. It also adds paperwork. A licensed surveyor or design professional must “prepare and seal documentation” of the elevation (R322.1.10), which the building department collects when the lowest floor is placed and again at the final inspection (FBC-Building 110.3). This is where a lot’s flood zone becomes real money, so check it before you buy the land. The same rules decide when an existing house must be raised; our FEMA 50% rule guide covers that side.

Structure and openings

Hurricane design: the wind speed your structure is built for

Every new house in Florida is engineered for wind, but the design speed changes by county. Miami-Dade and Broward make up the High-Velocity Hurricane Zone, and houses there follow the HVHZ sections of the Building volume (R301.1 and 1601.1). Section 1620.2 sets Risk Category II design speeds of 175 mph in Miami-Dade and 170 mph in Broward. Palm Beach County is outside the HVHZ; its own wind-speed map steps from 150 mph near Lake Okeechobee to 160 mph in the centre and 170 mph along the coast.

The wind speed flows into the structure (reinforced masonry or concrete, tie beams, roof-to-wall connections, the roof deck and covering) and into every opening. In the HVHZ, exterior walls, the roof, doors, skylights and glazing “shall meet impact test criteria or be protected with an external protection device” (section 1626.1). On a modern design with large window walls and multi-panel sliders, the approved impact glazing is often one of the biggest single packages in the budget. See our hurricane-rated window systems.

Envelope and ducts

Energy code: the two tests every new house must pass

Florida’s Energy Conservation Code (8th edition, 2023) makes testing mandatory for new homes. The house must be “tested and verified as having an air leakage rate not exceeding seven air changes per hour” in climate zones 1 and 2, which include South Florida (R402.4.1.2). That is the blower-door test. The ducts are pressure-tested too (R403.3.3), and leakage may not exceed 4 cubic feet per minute per 100 sq ft of conditioned floor area (R403.3.4).

The tests themselves are a modest line. The cost is in passing them the first time: sealed penetrations, an air barrier that is continuous where the walls meet the roof, and ducts that are sealed and inside the conditioned space where the design allows. A failed test means rework before the final inspection. We plan for it at the drawing stage; see energy-efficient new home construction.

Before the first footing

Impact fees, utility connections and permits

Impact fees are charged on new homes because, in the words of section 163.31801, Florida Statutes, they fund “the infrastructure necessitated by new growth.” Each county and many cities set their own schedule, usually by house size. As one published example, unincorporated Palm Beach County charges these fees for a single-family house of 2,000 to 3,599 sq ft:

Water and sewer. Where public sewer is available, the utility charges to connect. Miami-Dade Water and Sewer, for example, charges $1.39 for water and $5.60 for sewer per average daily gallon (2025–26 schedule), and allocates a single-family house 210 gallons a day under 3,001 sq ft, 310 up to 5,000 and 510 above that. For a house under 3,001 sq ft in its service area, that works out to $1,467.90 in connection charges, before the plumber’s work and the meter. The schedule is revised by fiscal year (from October 1), so check the current one. On a lot without sewer, a septic system needs a permit: the rules are now the Department of Environmental Protection’s, but in these three counties the county health department still issues and inspects it.

Permit and review fees are set by the building department (the NAHB average was $7,640). Florida lets the owner, or the owner’s contractor with written authorization, use a private provider for plan review and inspections; the department “must reduce the permit fee by the amount of cost savings realized” (section 553.791). Our new construction permitting team prepares the package.

Sales tax is built into the contract price, because Florida treats contractors as “the ultimate consumers of materials and supplies they use” (Rule 12A-1.051). The 2026 rate is 7% in Miami-Dade and Broward and 6.5% in Palm Beach (form DR-15DSS).

From lot to certificate

The order the money is spent in

A new house is paid for in stages, and several of the South Florida lines above land before a single wall goes up. This is the usual sequence, with the Florida rules that apply along the way:

1. Before you buyCheck the lotFlood zone and base flood elevation, the wind zone, whether sewer is available, and any HOA or zoning limits. These decide the foundation and the fees.
2. DesignDrawings and engineeringArchitecture, structural engineering for the wind speed, the energy calculations and the product approvals for the openings.
3. ContractDeposit and noticesA deposit over 10% of the contract price obliges the contractor to apply for permits within 30 days and start within 90 days of issue (section 489.126). The contract carries the Recovery Fund notice (section 489.1425).
4. PermitFees, impact fees, connectionsThe building permit, impact fees as your jurisdiction assesses them, and the utility or septic applications.
5. StartNotice of commencementRecorded before the first inspection on any direct contract over $5,000 (section 713.135).
6. Lowest floorElevation certifiedIn a flood zone, the sealed elevation documentation is submitted when the lowest floor is placed.
7. Before finalTests and final elevationBlower-door and duct tests, the final elevation certification and the final inspections lead to the certificate of occupancy.

Interactive checklist

Before you set a budget: a checklist

Our process

How we price a new house

We price new home construction from the lot and the drawings, not from a table. We start with the flood zone and elevation, the wind speed and the utilities, because they fix the foundation, the structure and the fees before any finish is chosen. Then the house itself: size, the number of bathrooms, the glazing and the finish level. On a design-build new home, one team carries the design, the permit package and the build, so the drawings the building department approves are the drawings we price. We also handle lot development and site preparation and custom home construction.

For an example of a modern build of the kind shown on this page, see our modern new-construction home project. Send us the lot address and any drawings you have and we will tell you which of these lines apply before we talk about numbers.