Key West Impact Fees by Project Type
Key West: Single-Family Impact Fees
A new single-family home in Key West pays at least $10,001.67 per unit in impact fees (rates sourced October 21, 2026). Every line item is levied at the municipal or utility level.
The largest line items are Water System Development Charge (FKAA) ($5,722.00), Water Tapping Fee (FKAA) — 5/8 in. x 3/4 in. meter ($1,908.00) and Sewer Connection Charge (City of Key West) ($1,000.00).
Sewer Impact Fee (City of Key West) — 300 gpd × $2.00/gpd, Stormwater Impact Fee (City of Key West), and Solid Waste Impact Fee (City of Key West) 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.
Transportation Impact Fee (City of Key West) is set by the city and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; it is not included as a dollar figure 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 System Development Charge (FKAA)$5,722.005/8 in. x 3/4 in. meterFlorida Keys Aqueduct AuthorityOne-time FKAA water system development charge for a single-family home on a standard 5/8 in. x 3/4 in. meter, effective October 1, 2026 (FY2027; previously $5,279). FKAA is the sole potable water provider in the Florida Keys. A 1 in. meter pays $14,304. A separate one-time FKAA tapping (meter installation) fee also applies. FKAA re-adopts its rates each October 1.
- Water Tapping Fee (FKAA) — 5/8 in. x 3/4 in. meter$1,908.00Florida Keys Aqueduct AuthorityOne-time FKAA tapping fee (meter installation) for a standard 5/8 in. x 3/4 in. water meter, effective October 1, 2026, charged when FKAA installs the service. Where a service line already exists, FKAA charges only its meter drop-in fee ($954 at this size). Larger meters: 1 in. $2,543, 1-1/2 in. $4,323, 2 in. $5,086; 3 in. and larger at actual cost. FKAA re-adopts its rates each October 1.
- Sewer Connection Charge (City of Key West)$1,000.00City of Key WestCity of Key West sewer connection charge of $1,000 per living unit, paid to the City before a new unit connects to the sewer system (Code Sec. 74-203). Qualified low-income units pay $100. This is in addition to the City's sewer impact fee.
- Sewer Impact Fee (City of Key West) — 300 gpd × $2.00/gpd$600.00Requires confirmation3 bedrooms, 1,201 to 2,250 sq ftCity of Key WestCity of Key West sewer impact fee of $2.00 per gallon per day of estimated sewage flow (Code Ch. 54, Art. III, Div. 4). For new development the flow comes from the state system-size table: a 3-bedroom home of 1,201 to 2,250 sq ft is rated 300 gallons per day. The City also charges a separate $1,000 sewer connection charge per living unit. KW Resort Utilities serves part of Stock Island instead of the City system.
- Solid Waste Impact Fee (City of Key West)$430.00Requires confirmationCity of Key WestCity of Key West solid waste impact fee per dwelling unit, payable before the building permit becomes final or a certificate of occupancy issues (Code Ch. 54, Art. III, Div. 3, Table 7-6, as amended by Ordinance 24-27 in October 2024). The table steps over four years: $387, $430, $473 and $516 per unit; the Year 2 rate is shown. Accessory apartments are exempt.
- Stormwater Impact Fee (City of Key West)$341.67Requires confirmationCity of Key WestCity of Key West stormwater impact fee per equivalent stormwater unit (ESU), payable before a building permit, certificate of occupancy or discharge to the City stormwater system (Code Ch. 54, Art. III, Div. 5, Table 7.7, adopted by Ordinance 24-27 in October 2024). A dwelling unit is one ESU. The table steps over four years: $170.83, $341.67, $512.50 and $683.34 per ESU; the Year 2 rate is shown. It applies to accessory apartments.
- Transportation Impact Fee (City of Key West)Requires confirmationCity of Key WestThe City of Key West charges a traffic impact fee of $30.00 per vehicular trip end of estimated traffic generation for the use, payable before the building permit becomes final or a certificate of occupancy issues (Code Ch. 54, Art. III, Div. 2). The code does not print a trip rate per home, so no per-unit amount is shown. Accessory apartments are exempt.
- 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 $5,229.67 per unit in impact fees (rates sourced October 21, 2026). Every line item is levied at the municipal or utility level.
The largest line items are Water Tapping Fee (FKAA, MF) — 5/8 in. x 3/4 in. meter ($1,908.00) and Sewer Connection Charge (City of Key West, MF) ($1,000.00).
Stormwater Impact Fee (City of Key West, MF), Sewer Impact Fee (City of Key West, MF) — 200 gpd × $2.00/gpd, Water SDC (FKAA, MF 4+ units) — 10 FV × $115/FV, and Solid Waste Impact Fee (City of Key West, MF) 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.
Transportation Impact Fee (City of Key West, MF) is set by the city and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; it is not included as a dollar figure 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 Tapping Fee (FKAA, MF) — 5/8 in. x 3/4 in. meter$1,908.00Florida Keys Aqueduct AuthorityOne-time FKAA tapping fee (meter installation) per 5/8 in. x 3/4 in. water meter, effective October 1, 2026, charged when FKAA installs the service. Units on individual meters each pay it; a building on one larger meter pays once at that meter's size (1 in. $2,543, 1-1/2 in. $4,323, 2 in. $5,086; 3 in. and larger at actual cost). Where a service line already exists, FKAA charges only its meter drop-in fee.
- Water SDC (FKAA, MF 4+ units) — 10 FV × $115/FV$1,150.00Requires confirmationFlorida Keys Aqueduct AuthorityOne-time FKAA water system development charge for multifamily of 4 or more units, billed at $115 per fixture value (effective October 1, 2026). Shown for a typical 2-bed, 2-bath apartment modeled at 10 fixture values; the exact charge depends on the unit's plumbing fixtures. Buildings of 3 units or less pay $5,722 per unit instead. FKAA re-adopts its rates each October 1.
- Sewer Connection Charge (City of Key West, MF)$1,000.00City of Key WestCity of Key West sewer connection charge of $1,000 per living unit, paid to the City before a new unit connects to the sewer system (Code Sec. 74-203). Qualified low-income units pay $100. This is in addition to the City's sewer impact fee.
- Sewer Impact Fee (City of Key West, MF) — 200 gpd × $2.00/gpd$400.00Requires confirmation2 bedrooms, 751 to 1,200 sq ftCity of Key WestCity of Key West sewer impact fee of $2.00 per gallon per day of estimated sewage flow (Code Ch. 54, Art. III, Div. 4). For new development the flow comes from the state system-size table, per dwelling unit: a 2-bedroom unit of 751 to 1,200 sq ft is rated 200 gallons per day. The City also charges a separate $1,000 sewer connection charge per living unit.
- Solid Waste Impact Fee (City of Key West, MF)$430.00Requires confirmationCity of Key WestCity of Key West solid waste impact fee per dwelling unit, payable before the building permit becomes final or a certificate of occupancy issues (Code Ch. 54, Art. III, Div. 3, Table 7-6, as amended by Ordinance 24-27 in October 2024). The table steps over four years: $387, $430, $473 and $516 per unit; the Year 2 rate is shown. Accessory apartments are exempt.
- Stormwater Impact Fee (City of Key West, MF)$341.67Requires confirmationCity of Key WestCity of Key West stormwater impact fee per equivalent stormwater unit (ESU) (Code Ch. 54, Art. III, Div. 5, Table 7.7, adopted by Ordinance 24-27 in October 2024). Each dwelling unit is one ESU. The table steps over four years: $170.83, $341.67, $512.50 and $683.34 per ESU; the Year 2 rate is shown.
- Transportation Impact Fee (City of Key West, MF)Requires confirmationCity of Key WestThe City of Key West charges a traffic impact fee of $30.00 per vehicular trip end of estimated traffic generation for the use, payable before the building permit becomes final or a certificate of occupancy issues (Code Ch. 54, Art. III, Div. 2). The code does not print a trip rate per apartment, so no per-unit amount is shown. Accessory apartments are exempt.
- 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 $1.07 per square foot in impact fees, plus $18,688.67 in one-time water and sewer connection fees (rates sourced October 21, 2026).
For a 50,000 sq ft building, that comes to at least $72,438.67. The calculator below adjusts to your exact square footage.
The largest line items are Water System Development Charge (FKAA) — 1 in. meter ($14,304.00 one-time), Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 one-time) and Sewer Connection Charge (City of Key West) — per connection point ($1,500.00 one-time).
Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.
Stormwater Impact Fee (City of Key West, Commercial) — 1 ESU and Solid Waste Impact Fee (City of Key West, Commercial) — $107.50 per 100 sf 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.
Sewer Impact Fee (City of Key West) is set by the utility and not published online. Traffic Impact Fee (City of Key West, Commercial) — per trip end is set by the city 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 Key West Impact Fee Schedule
- Water System Development Charge (FKAA) — 1 in. meter$14,304.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA water system development charge for a nonresidential service on a 1 in. meter, effective October 1, 2026 (FY2027). FKAA's primary nonresidential basis is $115.00 per fixture value (total fixture values at the premises, including irrigation); the meter-based charge applies where fixture values cannot be determined. FKAA is the sole water provider in the Florida Keys and re-adopts its rates each October 1.
- Water Tapping Fee (FKAA) — 1 in. meter$2,543.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA tapping fee (meter installation) for a 1 in. water meter, effective October 1, 2026, charged when FKAA installs the service. Where a service line already exists, FKAA charges only its meter drop-in fee ($1,082 at this size). Other sizes: 5/8 in. x 3/4 in. $1,908, 1-1/2 in. $4,323, 2 in. $5,086; 3 in. and larger at actual cost. FKAA re-adopts its rates each October 1.
- Sewer Connection Charge (City of Key West) — per connection point$1,500.00 one-timeCity of Key WestCity of Key West commercial sewer connection charge, $1,500 per connection point to the sewer system, plus the greater of $400 for each additional living unit served by the connection point or $1,000 for each 6,000 gallons per month of estimated flow through it (Code Sec. 74-203). Charged in addition to the city sewer impact fee. Eastern Key West and Stock Island are served by KW Resort Utilities.
- 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).
- Stormwater Impact Fee (City of Key West, Commercial) — 1 ESU$341.67 one-timeRequires confirmationCity of Key WestCity of Key West stormwater impact fee, $341.67 per equivalent stormwater unit (ESU), shown at 1 ESU (Code Ch. 54, Table 7.7, Year 2 of a four-year phase-in adopted October 10, 2024: $170.83, $341.67, $512.50, then $683.34 per ESU). One ESU is the average impervious area of a home (about 1,440 sq ft); nonresidential properties are charged by ESUs computed from gross area and a runoff coefficient, so most commercial projects pay several ESUs.
- Solid Waste Impact Fee (City of Key West, Commercial) — $107.50 per 100 sf$1.07/sq ftRequires confirmationCity of Key WestCity of Key West solid waste impact fee for retail space, $107.50 per 100 sq ft (Code Sec. 54-118, Table 7-6, Year 2 of a four-year phase-in adopted October 10, 2024 by Ord. 24-27: $96.75, $107.50, $118.25, then $129.00 per 100 sq ft). The code gives no dates for the yearly steps.
- 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.
- County Impact Fees within Key West (Monroe County, Commercial)$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.
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-time water/sewer connection charges only; no per-sq-ft impact fee schedule sourced for that jurisdiction. = 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, but owes $18,688.67 in one-time water and sewer connection fees (rates sourced October 21, 2026).
For a 50,000 sq ft building, that comes to at least $18,688.67. The calculator below adjusts to your exact square footage.
The largest line items are Water System Development Charge (FKAA) — 1 in. meter ($14,304.00 one-time), Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 one-time) and Sewer Connection Charge (City of Key West) — per connection point ($1,500.00 one-time).
Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.
Stormwater Impact Fee (City of Key West, Industrial) — 1 ESU 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 Impact Fee (City of Key West) is 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) — 1 in. meter$14,304.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA water system development charge for a nonresidential service on a 1 in. meter, effective October 1, 2026 (FY2027). FKAA's primary nonresidential basis is $115.00 per fixture value (total fixture values at the premises, including irrigation); the meter-based charge applies where fixture values cannot be determined. FKAA is the sole water provider in the Florida Keys and re-adopts its rates each October 1.
- Water Tapping Fee (FKAA) — 1 in. meter$2,543.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA tapping fee (meter installation) for a 1 in. water meter, effective October 1, 2026, charged when FKAA installs the service. Where a service line already exists, FKAA charges only its meter drop-in fee ($1,082 at this size). Other sizes: 5/8 in. x 3/4 in. $1,908, 1-1/2 in. $4,323, 2 in. $5,086; 3 in. and larger at actual cost. FKAA re-adopts its rates each October 1.
- Sewer Connection Charge (City of Key West) — per connection point$1,500.00 one-timeCity of Key WestCity of Key West commercial sewer connection charge, $1,500 per connection point to the sewer system, plus the greater of $400 for each additional living unit served by the connection point or $1,000 for each 6,000 gallons per month of estimated flow through it (Code Sec. 74-203). Charged in addition to the city sewer impact fee. Eastern Key West and Stock Island are served by KW Resort Utilities.
- 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).
- Stormwater Impact Fee (City of Key West, Industrial) — 1 ESU$341.67 one-timeRequires confirmationCity of Key WestCity of Key West stormwater impact fee, $341.67 per equivalent stormwater unit (ESU), shown at 1 ESU (Code Ch. 54, Table 7.7, Year 2 of a four-year phase-in adopted October 10, 2024: $170.83, $341.67, $512.50, then $683.34 per ESU). One ESU is the average impervious area of a home (about 1,440 sq ft); nonresidential properties are charged by ESUs computed from gross area and a runoff coefficient, so most commercial projects pay several ESUs.
- 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 of Key West solid waste impact fee table (Code Sec. 54-118, Table 7-6) lists office, retail, restaurant, bar and lounge, theater, marina and hotel uses, with no industrial or warehouse row.
- County Impact Fees within Key West (Monroe County, Industrial)$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.
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-time water/sewer connection charges only; no per-sq-ft impact fee schedule sourced for that jurisdiction. = 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 $0.47 per square foot in impact fees, plus $18,688.67 in one-time water and sewer connection fees (rates sourced October 21, 2026).
For a 25,000 sq ft building, that comes to at least $30,446.17. The calculator below adjusts to your exact square footage.
The largest line items are Water System Development Charge (FKAA) — 1 in. meter ($14,304.00 one-time), Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 one-time) and Sewer Connection Charge (City of Key West) — per connection point ($1,500.00 one-time).
Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.
Stormwater Impact Fee (City of Key West, Office) — 1 ESU 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 Impact Fee (City of Key West) is set by the utility and not published online. Traffic Impact Fee (City of Key West, Office) — per trip end is set by the city 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 Key West Impact Fee Schedule
- Water System Development Charge (FKAA) — 1 in. meter$14,304.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA water system development charge for a nonresidential service on a 1 in. meter, effective October 1, 2026 (FY2027). FKAA's primary nonresidential basis is $115.00 per fixture value (total fixture values at the premises, including irrigation); the meter-based charge applies where fixture values cannot be determined. FKAA is the sole water provider in the Florida Keys and re-adopts its rates each October 1.
- Water Tapping Fee (FKAA) — 1 in. meter$2,543.00 one-timeFlorida Keys Aqueduct AuthorityOne-time FKAA tapping fee (meter installation) for a 1 in. water meter, effective October 1, 2026, charged when FKAA installs the service. Where a service line already exists, FKAA charges only its meter drop-in fee ($1,082 at this size). Other sizes: 5/8 in. x 3/4 in. $1,908, 1-1/2 in. $4,323, 2 in. $5,086; 3 in. and larger at actual cost. FKAA re-adopts its rates each October 1.
- Sewer Connection Charge (City of Key West) — per connection point$1,500.00 one-timeCity of Key WestCity of Key West commercial sewer connection charge, $1,500 per connection point to the sewer system, plus the greater of $400 for each additional living unit served by the connection point or $1,000 for each 6,000 gallons per month of estimated flow through it (Code Sec. 74-203). Charged in addition to the city sewer impact fee. Eastern Key West and Stock Island are served by KW Resort Utilities.
- 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).
- Stormwater Impact Fee (City of Key West, Office) — 1 ESU$341.67 one-timeRequires confirmationCity of Key WestCity of Key West stormwater impact fee, $341.67 per equivalent stormwater unit (ESU), shown at 1 ESU (Code Ch. 54, Table 7.7, Year 2 of a four-year phase-in adopted October 10, 2024: $170.83, $341.67, $512.50, then $683.34 per ESU). One ESU is the average impervious area of a home (about 1,440 sq ft); nonresidential properties are charged by ESUs computed from gross area and a runoff coefficient, so most commercial projects pay several ESUs.
- Solid Waste Impact Fee (City of Key West, Office) — $47.03 per 100 sf$0.47/sq ftCity of Key WestCity of Key West solid waste impact fee for office space, $47.03 per 100 sq ft (Code Sec. 54-118, Table 7-6, adopted October 10, 2024 by Ord. 24-27). The office rate is $45.01 in the first year of the phase-in and $47.03 in years two through four.
- 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.
- County Impact Fees within Key West (Monroe County, Office)$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.
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-time water/sewer connection charges only; no per-sq-ft impact fee schedule sourced for that jurisdiction. = 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 a 2021 amendment (Ch. 2021-63, Laws of Florida), 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.
Summary current as of September 2026. This is an editorial summary, not legal advice; see the official statute text and our terms of use.
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 $10,001.67 per unit in combined impact fees (rates sourced October 21, 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.
How much are commercial impact fees in Key West?
Commercial development in Key West pays $1.07 per square foot in impact fees, plus $18,688.67 in one-time water and sewer connection fees (assuming a 1-inch meter), at least $72,438.67 for a 50,000 sq ft building. 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.
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.