Monroe County impact fees by project type
Where in Monroe 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 Monroe County: Single-Family Impact Fees
A new single-family home in unincorporated Monroe County pays at least $13,167.00 per unit in impact fees (rates sourced July 17, 2026). Every line item is levied at the municipal or utility level.
The largest line items are Sewer System Development Charge (FKAA) ($7,888.00) and Water System Development Charge (FKAA) ($5,279.00).
Library Impact Fee (Monroe County Fair Share), Transportation Impact Fee (Monroe County Fair Share), Community Park Impact Fee (Monroe County Fair Share), Police Facilities Impact Fee (Monroe County Fair Share), and Solid Waste Impact Fee (Monroe County Fair Share) are set by the county and have no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.
View the full Monroe County impact fee schedule
- Water System Development Charge (FKAA)$5,279.00Florida Keys Aqueduct AuthorityOne-time FKAA water system-development charge for a single-family home on a standard 5/8"x3/4" meter, effective 10/1/2025. FKAA is the sole potable-water provider throughout Monroe County / the Florida Keys. Larger meters pay more (e.g. $13,196 at 1"), and a separate one-time meter-installation/tapping fee of $1,760 also applies. FKAA re-adopts its rate schedule each October 1.
- Sewer System Development Charge (FKAA)$7,888.00Florida Keys Aqueduct AuthorityOne-time FKAA wastewater system-development charge, $7,888 per unit, effective 10/1/2025 and now uniform countywide (the former per-district rates no longer appear). Unincorporated Keys wastewater is served by FKAA (Cudjoe Regional, Big Coppitt, Conch/Duck Key, Bay Point and Key Haven systems), plus KW Resort Utilities on Stock Island. A separate one-time wastewater connection charge also applies: $7,506 low-pressure or $9,149 gravity. FKAA re-adopts its schedule each October 1.
- Municipal Impact Fees (Unincorporated – N/A)$0.00Monroe CountyNot applicable. The unincorporated county has no municipal (city) impact fees; the county's own fair-share impact fees apply here instead (see the County records for transportation, community park, library, solid waste and police).
- Library Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County's fair-share library impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-10). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, so no current amount is shown. The county impact-fee district covers the unincorporated county (Upper, Middle and Lower Keys subdistricts); the cities of Key West and Layton are excluded.
- Transportation Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County's fair-share transportation impact fee applies to new development in the unincorporated Keys (Land Development Code Ch. 126, Sec. 126-8). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, so no current amount is shown. Separately, a developer may satisfy transportation concurrency through a proportionate fair-share agreement (Sec. 126-2), credited against this fee. The county impact-fee district covers the unincorporated county; the cities of Key West and Layton are excluded.
- Community Park Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County's fair-share community park impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-9). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, so no current amount is shown. The county impact-fee district covers the unincorporated county; the cities of Key West and Layton are excluded.
- Police Facilities Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County's fair-share police facilities impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-12). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, so no current amount is shown. There is no county fire or EMS impact fee. The cities of Key West and Layton are excluded from the county district.
- Solid Waste Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County's fair-share solid waste impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-11). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, so no current amount is shown. The county impact-fee district covers the unincorporated county; the cities of Key West and Layton are excluded.
Where in Monroe 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 Monroe County: Multifamily Impact Fees
A new multifamily unit in unincorporated Monroe County pays at least $3,150.00 per unit in impact fees (rates sourced July 17, 2026). Every line item is levied at the municipal or utility level.
Water SDC (FKAA, MF 4+ units) — 10 FV × $106/FV and Sewer SDC (FKAA, MF 4+ units) — 10 FV × $209/FV are shown at the last published amount but have not been confirmed with the jurisdiction; they are included in the totals here. Verify before budgeting.
Library Impact Fee (Monroe County Fair Share, MF), Police Facilities Impact Fee (Monroe County Fair Share, MF), Solid Waste Impact Fee (Monroe County Fair Share, MF), Transportation Impact Fee (Monroe County Fair Share, MF), and Community Park Impact Fee (Monroe County Fair Share, MF) are set by the county and have no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.
Some fees are tiered by unit size or building type; amounts reflect the representative tier noted in the schedule below.
View the full Monroe County impact fee schedule
- Water SDC (FKAA, MF 4+ units) — 10 FV × $106/FV$1,060.00Requires confirmationFlorida Keys Aqueduct AuthorityOne-time FKAA water system-development charge for multifamily of 4+ units, billed on a commercial fixture-value basis at $106 per fixture value (effective 10/1/2025). Shown here for a typical 2-bed/2-bath apartment modeled at 10 fixture values (about $1,060/unit); the exact charge depends on the unit's plumbing-fixture count. Buildings of 3 units or less instead pay the flat $5,279/unit rate (see the other tier). FKAA re-adopts its schedule each October 1.
- Sewer SDC (FKAA, MF 4+ units) — 10 FV × $209/FV$2,090.00Requires confirmationFlorida Keys Aqueduct AuthorityOne-time FKAA wastewater system-development charge for multifamily of 4+ units, billed on a commercial fixture-value basis at $209 per fixture value (effective 10/1/2025, now uniform countywide). Shown here for a typical 2-bed/2-bath apartment modeled at 10 fixture values (about $2,090/unit); the exact charge depends on the unit's plumbing-fixture count. Buildings of 3 units or less instead pay $7,888/unit (see the other tier). A separate one-time connection charge ($7,506 low-pressure / $9,149 gravity) also applies. FKAA re-adopts its schedule each October 1.
- Municipal Impact Fees (Unincorporated – N/A, MF)$0.00Monroe CountyNot applicable. The unincorporated county has no municipal (city) impact fees; the county's own fair-share impact fees apply here instead (see the County records).
- Library Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share library impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-10). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, and the multifamily rate differs from the single-family rate, so no current amount is shown. The cities of Key West and Layton are excluded from the county district.
- Police Facilities Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share police facilities impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-12). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, and the multifamily rate differs from the single-family rate, so no current amount is shown. There is no county fire or EMS impact fee.
- Solid Waste Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share solid waste impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-11). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, and the multifamily rate differs from the single-family rate, so no current amount is shown. The cities of Key West and Layton are excluded from the county district.
- Transportation Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share transportation impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-8). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, and the multifamily rate differs from the single-family rate, so no current amount is shown. A developer may alternatively meet transportation concurrency via a proportionate fair-share agreement (Sec. 126-2), credited against this fee.
- Community Park Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share community park impact fee applies to new development in the unincorporated Keys (LDC Ch. 126, Sec. 126-9). The code authorizes the fee but sets no amount - the dollar schedule is adopted by separate county resolution and is not published online, and the multifamily rate differs from the single-family rate, so no current amount is shown. The cities of Key West and Layton are excluded from the county district.
Where in Monroe 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 Monroe County: Commercial Impact Fees
Commercial development in unincorporated Monroe County pays no per-square-foot impact fees (rates sourced July 17, 2026).
Sewer System Development Charge (FKAA) and Water System Development Charge (FKAA) are set by the utility and not published online. Fair Share Impact Fees (Monroe County, Commercial) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.
View the full Monroe County impact fee schedule
- Water System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityPotable water system development charge set by the Florida Keys Aqueduct Authority, the sole water provider for the Florida Keys. Nonresidential charge is $106.00 per fixture value (total fixture value at the premises, including irrigation); a meter-size charge applies only where fixture value cannot be determined. A separate one-time tapping/meter installation fee also applies. Effective October 1, 2025.
- Sewer System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityWastewater system development charge set by the Florida Keys Aqueduct Authority, which serves the unincorporated Keys (Cudjoe Regional, Big Coppitt, Conch/Duck Key, Bay Point, Key Haven). Nonresidential (commercial) charge is $209.00 per fixture value; a separate one-time wastewater connection charge also applies. Stock Island is served separately by a private utility. Effective October 1, 2025.
- Municipal Impact Fees (Unincorporated Monroe – N/A, Commercial)$0.00N/A (unincorporated)Unincorporated Monroe County has no incorporated municipality, so no municipal impact fee applies. County Fair Share impact fees apply in the unincorporated area.
- Fair Share Impact Fees (Monroe County, Commercial)Requires confirmationMonroe County BOCC
Where in Monroe 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 Monroe County: Industrial Impact Fees
Industrial development in unincorporated Monroe County pays no per-square-foot impact fees (rates sourced July 17, 2026).
Sewer System Development Charge (FKAA) and Water System Development Charge (FKAA) are set by the utility and not published online. Fair Share Impact Fees (Monroe County, Industrial) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.
View the full Monroe County impact fee schedule
- Water System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityPotable water system development charge set by the Florida Keys Aqueduct Authority, the sole water provider for the Florida Keys. Nonresidential charge is $106.00 per fixture value (total fixture value at the premises, including irrigation); a meter-size charge applies only where fixture value cannot be determined. A separate one-time tapping/meter installation fee also applies. Effective October 1, 2025.
- Sewer System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityWastewater system development charge set by the Florida Keys Aqueduct Authority, which serves the unincorporated Keys (Cudjoe Regional, Big Coppitt, Conch/Duck Key, Bay Point, Key Haven). Nonresidential (commercial) charge is $209.00 per fixture value; a separate one-time wastewater connection charge also applies. Stock Island is served separately by a private utility. Effective October 1, 2025.
- Municipal Impact Fees (Unincorporated Monroe – N/A, Industrial)$0.00N/A (unincorporated)Unincorporated Monroe County has no incorporated municipality, so no municipal impact fee applies. County Fair Share impact fees apply in the unincorporated area.
- Fair Share Impact Fees (Monroe County, Industrial)Requires confirmationMonroe County BOCC
Where in Monroe 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 Monroe County: Office Impact Fees
Office development in unincorporated Monroe County pays no per-square-foot impact fees (rates sourced July 17, 2026).
Sewer System Development Charge (FKAA) and Water System Development Charge (FKAA) are set by the utility and not published online. Fair Share Impact Fees (Monroe County, Office) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.
View the full Monroe County impact fee schedule
- Water System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityPotable water system development charge set by the Florida Keys Aqueduct Authority, the sole water provider for the Florida Keys. Nonresidential charge is $106.00 per fixture value (total fixture value at the premises, including irrigation); a meter-size charge applies only where fixture value cannot be determined. A separate one-time tapping/meter installation fee also applies. Effective October 1, 2025.
- Sewer System Development Charge (FKAA)Contact jurisdiction/utility to verifyFlorida Keys Aqueduct AuthorityWastewater system development charge set by the Florida Keys Aqueduct Authority, which serves the unincorporated Keys (Cudjoe Regional, Big Coppitt, Conch/Duck Key, Bay Point, Key Haven). Nonresidential (commercial) charge is $209.00 per fixture value; a separate one-time wastewater connection charge also applies. Stock Island is served separately by a private utility. Effective October 1, 2025.
- Municipal Impact Fees (Unincorporated Monroe – N/A, Office)$0.00N/A (unincorporated)Unincorporated Monroe County has no incorporated municipality, so no municipal impact fee applies. County Fair Share impact fees apply in the unincorporated area.
- Fair Share Impact Fees (Monroe County, Office)Requires confirmationMonroe County BOCC
Monroe County impact fee calculator
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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.
Brush up on impact fee basics before you budget your next project.
Monroe County impact fee FAQs
What are single-family impact fees in Monroe County, Florida?
A new single-family home in unincorporated Monroe County pays at least $13,167.00 per unit in impact fees (rates sourced July 17, 2026). 5 additional fees have no published standard amounts and are not included, so the full cost may be higher; verify before budgeting. 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 Monroe County?
Multifamily development in unincorporated Monroe County pays at least $3,150.00 per unit in impact fees (rates sourced July 17, 2026). This figure includes amounts that have not been confirmed and excludes fees with no published standard amount, so the full cost may be higher; verify before budgeting. Rates inside city limits depend on the municipality. Pick your city on this page.
How much are commercial impact fees in Monroe County?
Unincorporated Monroe County does not currently levy impact fees on commercial development.
Do cities in Monroe County charge their own impact fees?
Yes. Every incorporated city applies its own fee schedule. 5 of 5 cities in Monroe 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.