Martin County impact fees by project type
Where in Martin County are you building?
Each jurisdiction applies its own fee schedule. Pick yours. = one or more fees are unconfirmed or have no published amount; the figure shown may not be the complete cost.
Unincorporated Martin County: Single-Family Impact Fees
A new single-family home in unincorporated Martin County pays $17,580.39 per unit in impact fees (rates sourced July 14, 2026). All of it is levied by Martin County.
The largest line items are County Impact Fee (Martin County) ($8,203.00), School Impact Fee (Martin County School District) ($5,567.39) and Sewer Capital Facility Charge (Martin County Utilities) ($2,100.00).
Some fees are tiered by unit size or building type; amounts reflect the representative tier noted in the schedule below.
View the full Martin County impact fee schedule
- Water Capital Facility Charge (Martin County Utilities)$1,710.00Martin County Utilities and Solid WasteMartin County Utilities water capital facility charge: $1,710 per ERC (a single-family home is 1.0 ERC), effective June 1, 2025. MCU serves unincorporated Martin County, Sewall's Point and Ocean Breeze. In North River Shores Area V a $560/ERC distribution-line charge is added; other areas are charged at cost.
- Sewer Capital Facility Charge (Martin County Utilities)$2,100.00Martin County Utilities and Solid WasteMartin County Utilities sewer capital facility charge: $2,100 per ERC (a single-family home is 1.0 ERC), effective June 1, 2025. MCU serves unincorporated Martin County, Sewall's Point and Ocean Breeze.
- City Impact Fee (Martin County - Unincorporated)$0.00Unincorporated Martin County has no municipal (city) impact fees; county-level impact fees apply instead — see the Martin County impact fee records.
- County Impact Fee (Martin County)$8,203.001,101-2,300 sq ftMartin County Board of County CommissionersMartin County impact fee for a single-family home of 1,101-2,300 sq ft (the typical house): $8,203 per dwelling unit, effective January 1, 2026. Applies in unincorporated Martin County. Other size tiers range from $4,421 (800 sq ft or less) to $11,443 (over 2,300 sq ft). Scheduled increases: $8,654 (Jan 1, 2027) and $9,103 (Jan 1, 2028). Covers transportation, public buildings, law enforcement/corrections, fire rescue, parks, conservation and library facilities (incl. 1.5% admin).
- School Impact Fee (Martin County School District)$5,567.391,101-2,300 sq ftMartin County School DistrictMartin County School District impact fee for a 1,101-2,300 sq ft dwelling (the typical house): $5,567.39 per unit. Assessed by dwelling-unit size; the only schedule the district currently publishes is effective October 1, 2008. Other tiers range from $3,609.37 (800 sq ft or less) to $5,756.12 (2,301 sq ft or more).
Where in Martin County are you building?
Each jurisdiction applies its own fee schedule. Pick yours. = one or more fees are unconfirmed or have no published amount; the figure shown may not be the complete cost.
Unincorporated Martin County: Multifamily Impact Fees
A new multifamily unit in unincorporated Martin County pays $12,569.08 per unit in impact fees (rates sourced July 14, 2026). All of it is levied by Martin County.
The largest line items are School Impact Fee (Martin County School District, MF) ($5,355.08), County Impact Fee (Martin County, MF) ($5,309.00) and Sewer Capital Facility Charge (Martin County Utilities, MF) ($1,050.00).
Some fees are tiered by unit size or building type; amounts reflect the representative tier noted in the schedule below.
View the full Martin County impact fee schedule
- Water Capital Facility Charge (Martin County Utilities, MF)$855.00Martin County Utilities and Solid WasteMartin County Utilities water capital facility charge for multifamily: $855 per unit (published per-unit rate; equals 0.5× the single-family ERC rate), effective June 1, 2025. Applies to both one-meter/two-unit and master-meter (3+ unit) configurations. MCU serves unincorporated Martin County, Sewall's Point and Ocean Breeze.
- Sewer Capital Facility Charge (Martin County Utilities, MF)$1,050.00Martin County Utilities and Solid WasteMartin County Utilities sewer capital facility charge for multifamily: $1,050 per unit (published per-unit rate; equals 0.5× the single-family ERC rate), effective June 1, 2025. Applies to both one-meter/two-unit and master-meter (3+ unit) configurations.
- City Impact Fee (Martin County - Unincorporated, MF)$0.00Unincorporated Martin County has no municipal (city) impact fees; county-level impact fees apply instead — see the Martin County impact fee records.
- School Impact Fee (Martin County School District, MF)$5,355.08801-1,100 sq ftMartin County School DistrictMartin County School District impact fee for a typical multifamily unit (801-1,100 sq ft): $5,355.08 per unit. Assessed by dwelling-unit size, not housing type; the only schedule published is effective October 1, 2008 (tiers range $3,609.37 to $5,756.12).
- County Impact Fee (Martin County, MF)$5,309.00Martin County Board of County CommissionersMartin County impact fee for a multifamily unit: $5,309 per dwelling unit (flat, all multifamily regardless of unit size or building height), effective January 1, 2026. Applies in unincorporated Martin County. Scheduled increases: $5,658 (Jan 1, 2027) and $6,004 (Jan 1, 2028). Covers transportation, public buildings, law enforcement/corrections, fire rescue, parks, conservation and library facilities.
Where in Martin County are you building?
Each jurisdiction applies its own fee schedule. Pick yours. Totals shown are for a 50,000 sq ft building, including one-time water/sewer fees (assuming a 1-inch meter). = one or more fees are unconfirmed or have no published amount; the figure shown may not be the complete cost.
Unincorporated Martin County: Commercial Impact Fees
Commercial development in unincorporated Martin County pays $8.02 per square foot in impact fees, plus $3,810.00 in one-time water and sewer connection fees (rates sourced July 14, 2026).
For a 50,000 sq ft building, that comes to about $405,010.00. The calculator below adjusts to your exact square footage.
The largest line items are Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC ($2,100.00 one-time), Water Capital Facility Charge (Martin County Utilities) — 1 ERC ($1,710.00 one-time) and County Impact Fee (Martin County, Commercial) ($8.02/sq ft).
Some fees are tiered by use or building size; amounts reflect the representative tier noted in the schedule below.
View the full Martin County impact fee schedule
- Water Capital Facility Charge (Martin County Utilities) — 1 ERC$1,710.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time water capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and distribution-line connection charges are separate and additional.
- Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC$2,100.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time sewer capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and line connection charges are separate and additional.
- City Impact Fee (Martin County - Unincorporated, Commercial)$0.00N/A — unincorporated area
- County Impact Fee (Martin County, Commercial)$8.02/sq ft40,000-150,000 SFGLAMartin County Board of County CommissionersEffective 1/1/2026. Retail/shopping center of 40,000-150,000 sq ft gross leasable area, charged per 1,000 sq ft (smaller and larger centers pay different tiers). Scheduled increases to $8,826 on 1/1/2027 and $9,626 on 1/1/2028. Includes a 1.5% administrative fee; assessed on the net increase over the prior use.
Where in Martin County are you building?
Each jurisdiction applies its own fee schedule. Pick yours. Totals shown are for a 50,000 sq ft building, including one-time water/sewer fees (assuming a 1-inch meter). = one or more fees are unconfirmed or have no published amount; the figure shown may not be the complete cost.
Unincorporated Martin County: Industrial Impact Fees
Industrial development in unincorporated Martin County pays $2.70 per square foot in impact fees, plus $3,810.00 in one-time water and sewer connection fees (rates sourced July 14, 2026).
For a 50,000 sq ft building, that comes to about $138,710.00. The calculator below adjusts to your exact square footage.
The largest line items are Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC ($2,100.00 one-time), Water Capital Facility Charge (Martin County Utilities) — 1 ERC ($1,710.00 one-time) and County Impact Fee (Martin County, Industrial) ($2.70/sq ft).
View the full Martin County impact fee schedule
- Water Capital Facility Charge (Martin County Utilities) — 1 ERC$1,710.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time water capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and distribution-line connection charges are separate and additional.
- Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC$2,100.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time sewer capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and line connection charges are separate and additional.
- City Impact Fee (Martin County - Unincorporated, Industrial)$0.00N/A — unincorporated area
- County Impact Fee (Martin County, Industrial)$2.70/sq ftMartin County Board of County CommissionersEffective 1/1/2026. Charged per 1,000 sq ft (general industrial). Scheduled increases to $2,926 on 1/1/2027 and $3,158 on 1/1/2028. Includes a 1.5% administrative fee; assessed on the net increase over the prior use.
Where in Martin County are you building?
Each jurisdiction applies its own fee schedule. Pick yours. Totals shown are for a 25,000 sq ft building, including one-time water/sewer fees (assuming a 1-inch meter). = one or more fees are unconfirmed or have no published amount; the figure shown may not be the complete cost.
Unincorporated Martin County: Office Impact Fees
Office development in unincorporated Martin County pays $3.52 per square foot in impact fees, plus $3,810.00 in one-time water and sewer connection fees (rates sourced July 14, 2026).
For a 25,000 sq ft building, that comes to about $91,685.00. The calculator below adjusts to your exact square footage.
The largest line items are Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC ($2,100.00 one-time), Water Capital Facility Charge (Martin County Utilities) — 1 ERC ($1,710.00 one-time) and County Impact Fee (Martin County, Office) ($3.52/sq ft).
View the full Martin County impact fee schedule
- Water Capital Facility Charge (Martin County Utilities) — 1 ERC$1,710.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time water capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and distribution-line connection charges are separate and additional.
- Sewer Capital Facility Charge (Martin County Utilities) — 1 ERC$2,100.00 one-timeMartin County Utilities and Solid WasteEffective 6/1/2025. One-time sewer capital facility charge per equivalent residential connection (ERC); for nonresidential use, 1 ERC = 250 gallons/day of average daily flow, so the total scales with the project's design flow. Meter and line connection charges are separate and additional.
- City Impact Fee (Martin County - Unincorporated, Office)$0.00N/A — unincorporated area
- County Impact Fee (Martin County, Office)$3.52/sq ftMartin County Board of County CommissionersEffective 1/1/2026. Charged per 1,000 sq ft of floor area (general office). Scheduled increases to $3,832 on 1/1/2027 and $4,148 on 1/1/2028. Includes a 1.5% administrative fee; assessed on the net increase over the prior use.
Martin County impact fee calculator
Estimate impact fees for your project. Set to single-family. Drop a pin or search an address for site-specific fees.
Location
Select a location to begin
Once you select an address or drop a pin, we'll identify the responsible city and county and generate a fee breakdown.
How impact fees work in Florida
Florida impact fees are one-time charges on new development, governed by Section 163.31801, Florida Statutes (the Florida Impact Fee Act). The statute requires fees to be based on the most recent and localized data, spent on the infrastructure category they were collected for, and adopted by ordinance.
Since 2021, the law also limits how fast fees can rise: increases up to 25% phase in over two years, increases of 25–50% phase in over four years, and increases above 50% are allowed only with a demonstrated extraordinary-circumstances study and at least a two-thirds vote of the governing body.
Counties and cities can both levy impact fees. Inside an incorporated city, a project typically pays the county's countywide fees plus any municipal fees the city has adopted, which is why totals differ between a city and the unincorporated county around it.
New to impact fees? Our plain-English guide explains what they cover, who pays them, and why they exist.
Martin County impact fee FAQs
What are single-family impact fees in Martin County, Florida?
A new single-family home in unincorporated Martin County pays $17,580.39 per unit in impact fees (rates sourced July 14, 2026). Inside city limits, fees are set by each city's own schedule and may be completely different. See the city pages for their rates.
How much are multifamily impact fees in Martin County?
Multifamily development in unincorporated Martin County pays $12,569.08 per unit in impact fees (rates sourced July 14, 2026). Rates inside city limits depend on the municipality. Pick your city on this page.
How much are commercial impact fees in Martin County?
Commercial development in unincorporated Martin County pays $8.02 per square foot in impact fees, plus $3,810.00 in one-time water and sewer connection fees, about $405,010.00 for a 50,000 sq ft building.
Do cities in Martin County charge their own impact fees?
Yes. Every incorporated city applies its own fee schedule. 5 of 5 cities in Martin County levy municipal impact or utility fees; each city page shows the full schedule that applies inside its limits.
Can Florida impact fees increase at any time?
No. Section 163.31801, Florida Statutes limits increases to 50% at most, phased in over two to four years, unless the local government makes extraordinary-circumstances findings and approves the increase by at least a two-thirds vote.
Fee amounts on this page are compiled from official published schedules and are provided for planning purposes only. Rates change, and project specifics (unit size, meter size, location within special districts) can alter what applies. Always verify current fees with the jurisdiction and utility before relying on them.