Key West impact fees by project type
Key West: Single-Family Impact Fees
A new single-family home in Key West pays at least $5,279.00 per unit in impact fees (rates sourced August 15, 2026). Every line item is levied at the municipal or utility level.
The largest line items are Water System Development Charge (FKAA) ($5,279.00).
Sewer System Development/Capacity Fee (City of Key West / KW Resort Utilities) is set by the utility and not published online. Police Impact Fee (City of Key West), Parks & Recreation Impact Fee (City of Key West), Fire Impact Fee (City of Key West), and Transportation Impact Fee (City of Key West) are set by the city 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 Key West 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/Capacity Fee (City of Key West / KW Resort Utilities)Requires confirmationCity of Key West / KW Resort UtilitiesWastewater in Key West is provided by the City of Key West and, on Stock Island / eastern Key West, by KW Resort Utilities - not by FKAA. A one-time sewer system-development/capacity charge applies, but neither provider publishes the amount online (the City's rate page shows monthly service rates only), so no current figure is shown.
- Police Impact Fee (City of Key West)Requires confirmationCity of Key WestThe City of Key West levies a police facilities impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- Parks & Recreation Impact Fee (City of Key West)Requires confirmationCity of Key WestThe City of Key West levies a parks and recreation impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- Fire Impact Fee (City of Key West)Requires confirmationCity of Key WestThe City of Key West levies a fire impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- Transportation Impact Fee (City of Key West)Requires confirmationCity of Key WestThe City of Key West administers its own impact-fee program under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.), covering transportation, parks/recreation, police and fire; the City reduced these fees 25% by a 2024 amendment. The current per-category dollar amounts are not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown.
- County Impact Fees within Key West (applicability)$0.00Monroe County BOCCNot applicable. The City of Key West is expressly excluded from Monroe County's impact-fee district (LDC Sec. 126-4(e)(1)), so county fair-share impact fees are not collected within Key West. The City runs its own impact-fee program under Code Ch. 54.
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.
Key West: Multifamily Impact Fees
A new multifamily unit in Key West pays at least $1,060.00 per unit in impact fees (rates sourced August 15, 2026). Every line item is levied at the municipal or utility level.
Water SDC (FKAA, MF 4+ units) — 10 FV × $106/FV is shown at the last published amount but has not been confirmed with the jurisdiction; it is included in the totals here. Verify before budgeting.
Sewer SDC/Capacity Fee (City of Key West / KW Resort Utilities, MF) is set by the utility and not published online. Police Impact Fee (City of Key West, MF), Parks & Recreation Impact Fee (City of Key West, MF), Transportation Impact Fee (City of Key West, MF), and Fire Impact Fee (City of Key West, MF) are set by the city 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 Key West 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/Capacity Fee (City of Key West / KW Resort Utilities, MF)Requires confirmationCity of Key West / KW Resort UtilitiesWastewater in Key West is provided by the City of Key West and, on Stock Island, by KW Resort Utilities - not by FKAA. A multifamily sewer capacity charge scales with the master meter / number of equivalent units, but the amount is not published online (the City's rate page shows monthly rates only), so no figure is shown.
- Police Impact Fee (City of Key West, MF)Requires confirmationCity of Key WestThe City of Key West levies a police facilities impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- Parks & Recreation Impact Fee (City of Key West, MF)Requires confirmationCity of Key WestThe City of Key West levies a parks and recreation impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- Transportation Impact Fee (City of Key West, MF)Requires confirmationCity of Key WestThe City of Key West administers its own impact-fee program under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.), covering transportation, parks/recreation, police and fire; the City reduced these fees 25% by a 2024 amendment. The current per-category multifamily amounts are not published online (the City's posted planning fee schedule lists application fees only), so no figure is shown.
- Fire Impact Fee (City of Key West, MF)Requires confirmationCity of Key WestThe City of Key West levies a fire impact fee on new development under Code of Ordinances Ch. 54 (Sec. 54-56 et seq.); the City reduced its impact fees 25% by a 2024 amendment. The current dollar amount is not published online (the City's posted planning fee schedule lists application/processing fees only), so no figure is shown. Monroe County's own fair-share impact fees do not apply within Key West.
- County Impact Fees within Key West (applicability, MF)$0.00Monroe County BOCCNot applicable. The City of Key West is expressly excluded from Monroe County's impact-fee district (LDC Sec. 126-4(e)(1)), so county fair-share impact fees are not collected within Key West. The City runs its own impact-fee program under Code Ch. 54.
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.
Key West: Commercial Impact Fees
Commercial development in Key West pays no per-square-foot impact fees (rates sourced August 15, 2026).
Water System Development Charge (FKAA) and Sewer Impact Fee (City of Key West) are set by the utility and not published online. Solid Waste Impact Fee (City of Key West, Commercial) and Traffic Impact Fee (City of Key West, Commercial) — per trip end are set by the city 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 Key West 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 Impact Fee (City of Key West)Contact jurisdiction/utility to verifyCity of Key WestCity sewer impact fee charged per gallon per day of estimated sewage flow (flow = 95% of the highest six-month average metered water use; state flow estimates used for new uses). Eastern Key West and Stock Island are served by a separate private utility (KW Resort Utilities).
- Solid Waste Impact Fee (City of Key West, Commercial)Requires confirmationCity of Key WestCity solid waste impact fee, charged per 100 sq ft of gross floor area (Retail row). Phases in over four years: $96.75, then $107.50, then $118.25, then $129.00 per 100 SF. Adopted October 10, 2024; current amount reflects the second-year step.
- Traffic Impact Fee (City of Key West, Commercial) — per trip endContact jurisdiction/utility to verifyCity of Key WestCity traffic impact fee charged per vehicular trip end of estimated traffic generation (ITE/FDOT trip rates for the nearest comparable use), with credit for the prior use of the site. Current rate adopted October 10, 2024.
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.
Key West: Industrial Impact Fees
Industrial development in Key West pays no per-square-foot impact fees (rates sourced August 15, 2026).
Water System Development Charge (FKAA) and Sewer Impact Fee (City of Key West) are set by the utility and not published online. Traffic Impact Fee (City of Key West, Industrial) — per trip end and Solid Waste Impact Fee (City of Key West, Industrial) are set by the city 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 Key West 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 Impact Fee (City of Key West)Contact jurisdiction/utility to verifyCity of Key WestCity sewer impact fee charged per gallon per day of estimated sewage flow (flow = 95% of the highest six-month average metered water use; state flow estimates used for new uses). Eastern Key West and Stock Island are served by a separate private utility (KW Resort Utilities).
- Traffic Impact Fee (City of Key West, Industrial) — per trip endContact jurisdiction/utility to verifyCity of Key WestCity traffic impact fee charged per vehicular trip end of estimated traffic generation (ITE/FDOT trip rates for the nearest comparable use), with credit for the prior use of the site. Current rate adopted October 10, 2024.
- Solid Waste Impact Fee (City of Key West, Industrial)Requires confirmationCity of Key WestThe city solid waste impact fee schedule has no industrial or manufacturing row; the fee for an industrial use is set administratively based on the most comparable listed use.
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.
Key West: Office Impact Fees
Office development in Key West pays no per-square-foot impact fees (rates sourced August 15, 2026).
Water System Development Charge (FKAA) and Sewer Impact Fee (City of Key West) are set by the utility and not published online. Traffic Impact Fee (City of Key West, Office) — per trip end and Solid Waste Impact Fee (City of Key West, Office) are set by the city 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 Key West 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 Impact Fee (City of Key West)Contact jurisdiction/utility to verifyCity of Key WestCity sewer impact fee charged per gallon per day of estimated sewage flow (flow = 95% of the highest six-month average metered water use; state flow estimates used for new uses). Eastern Key West and Stock Island are served by a separate private utility (KW Resort Utilities).
- Traffic Impact Fee (City of Key West, Office) — per trip endContact jurisdiction/utility to verifyCity of Key WestCity traffic impact fee charged per vehicular trip end of estimated traffic generation (ITE/FDOT trip rates for the nearest comparable use), with credit for the prior use of the site. Current rate adopted October 10, 2024.
- Solid Waste Impact Fee (City of Key West, Office)Requires confirmationCity of Key WestCity solid waste impact fee, charged per 100 sq ft of gross floor area (Office row). Phases in over four years: $45.01, then $47.03 (held for years two through four). Adopted October 10, 2024.
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.
Key West 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.
Key West impact fee FAQs
What are the total impact fees for a single-family home in Key West, Florida?
A new single-family home in Key West pays at least $5,279.00 per unit in combined impact fees (rates sourced August 15, 2026). 5 additional fees have no published standard amounts and are not included, so the full cost may be higher; verify before budgeting.
How much are commercial impact fees in Key West?
Key West does not currently levy impact fees on commercial development.
Does Key West charge its own impact fees?
Yes. Key West levies its own municipal impact or utility fees. Monroe County does not currently add county-level impact fees inside Key West. The schedule on this page shows every fee that applies to development in Key West.
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.
Compare unincorporated rates and every other city on the Monroe County impact fees page.