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 $16,012.00 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 Sewer System Development Charge — KLWTD, $2,987 + $1,757 per DU + $3,638 per connection ($8,382.00), Water System Development Charge (FKAA) ($5,722.00) and Water Tapping Fee (FKAA) — 5/8 in. x 3/4 in. meter ($1,908.00).
Library Impact Fee (Monroe County Fair Share), Transportation Impact Fee (Monroe County Fair Share), Community Park Impact Fee (Monroe County Fair Share), and Fire and EMS 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.
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 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 System Development Charge — KLWTD, $2,987 + $1,757 per DU + $3,638 per connection$8,382.00Key Largo Wastewater Treatment DistrictOne-time Key Largo Wastewater Treatment District system impact charge for a home in Key Largo or Tavernier (east of Tavernier Creek, excluding Ocean Reef): $2,987 per dwelling unit for treatment plant capacity, $1,757 per dwelling unit for force main capacity and $3,638 per connection, under KLWTD Resolution 09-2026 adopted August 4, 2026. Grinder-pump parcels pay an added charge.
- 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).
- Police Facilities Impact Fee (Monroe County Fair Share)$0.00Monroe County BOCCMonroe County's fair-share police facilities impact fee (Land Development Code Ch. 126, Sec. 126-12) covers the unincorporated Keys, but the Board of County Commissioners set it to $0.00 beginning January 1, 2018. The cities of Key West and Layton are outside the county impact fee district.
- Solid Waste Impact Fee (Monroe County Fair Share)$0.00Monroe County BOCCMonroe County's fair-share solid waste impact fee (Land Development Code Ch. 126, Sec. 126-11) covers the unincorporated Keys, but the Board of County Commissioners set it to $0.00 beginning January 1, 2018. The cities of Key West and Layton are outside the county impact fee district.
- 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.
- Fire and EMS Impact Fee (Monroe County Fair Share)Requires confirmationMonroe County BOCCMonroe County budgets fire and EMS impact fee revenue collected within its impact fee districts (Fund 135), but the Land Development Code's impact fee chapter (Ch. 126) contains no fire or EMS fee section and no rate schedule is published, so no amount is shown.
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 $7,802.00 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 Sewer System Development Charge (MF) — KLWTD, $2,987 + $1,757 per DU ($4,744.00) and Water Tapping Fee (FKAA, MF) — 5/8 in. x 3/4 in. meter ($1,908.00).
Water SDC (FKAA, MF 4+ units) — 10 FV × $115/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.
Library Impact Fee (Monroe County Fair Share, MF), Fire and EMS 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 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 System Development Charge (MF) — KLWTD, $2,987 + $1,757 per DU$4,744.00KLWTD, per dwelling unitKey Largo Wastewater Treatment DistrictOne-time Key Largo Wastewater Treatment District system impact charge per apartment in Key Largo or Tavernier: $2,987 per dwelling unit for treatment plant capacity plus $1,757 per dwelling unit for force main capacity (KLWTD Resolution 09-2026, adopted August 4, 2026). The building also pays $3,638 per connection to the system.
- 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).
- Police Facilities Impact Fee (Monroe County Fair Share, MF)$0.00Monroe County BOCCMonroe County's fair-share police facilities impact fee (Land Development Code Ch. 126, Sec. 126-12) covers the unincorporated Keys, but the Board of County Commissioners set it to $0.00 beginning January 1, 2018. The cities of Key West and Layton are outside the county impact fee district.
- Solid Waste Impact Fee (Monroe County Fair Share, MF)$0.00Monroe County BOCCMonroe County's fair-share solid waste impact fee (Land Development Code Ch. 126, Sec. 126-11) covers the unincorporated Keys, but the Board of County Commissioners set it to $0.00 beginning January 1, 2018. The cities of Key West and Layton are outside the county impact fee district.
- 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.
- Fire and EMS Impact Fee (Monroe County Fair Share, MF)Requires confirmationMonroe County BOCCMonroe County budgets fire and EMS impact fee revenue collected within its impact fee districts (Fund 135), but the Land Development Code's impact fee chapter (Ch. 126) contains no fire or EMS fee section and no rate schedule is published, so no amount is shown.
- 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-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.
Unincorporated Monroe County: Commercial Impact Fees
Commercial development in unincorporated Monroe County pays no per-square-foot impact fees, but owes $25,229.00 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 $25,229.00. 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), Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection ($8,382.00 one-time) and Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 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.
Sewer System Development Charge (FKAA) is set by the utility and not published online. Fire and EMS Impact Fee (Monroe County, Commercial) and Transportation Impact Fee (Monroe County, Commercial) 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) — 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.
- Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection$8,382.00 one-timeKey Largo Wastewater Treatment DistrictOne-time Key Largo Wastewater Treatment District system impact charge for a nonresidential connection in Key Largo or Tavernier (east of Tavernier Creek, excluding Ocean Reef), shown at the minimum of 1 EDU: $2,987 per EDU for treatment plant capacity plus $1,757 per EDU for force main capacity, plus $3,638 per connection or the actual cost of connection, whichever is greater (KLWTD Resolution 09-2026, adopted August 4, 2026). One EDU corresponds to 167 gallons per day of potable water use; larger uses pay per EDU.
- 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 south of Mile Marker 87 (Cudjoe Regional, Big Coppitt, Conch and Duck Key, Long Key, Bay Point). Nonresidential charge is $227.00 per fixture value, effective October 1, 2026 (FY2027). FKAA also lists a one-time wastewater connection charge ($8,137 low pressure, $9,918 gravity). Key Largo and Tavernier are served by the Key Largo Wastewater Treatment District, Stock Island by KW Resort Utilities and Ocean Reef by North Key Largo Utility Corp.
- 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.
- Community Park Impact Fee (Monroe County, Commercial)$0.00Monroe County BOCCMonroe County's fair share park fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Solid Waste Impact Fee (Monroe County, Commercial)$0.00Monroe County BOCCMonroe County's solid waste impact fee (LDC Sec. 126-11) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Library Impact Fee (Monroe County, Commercial)$0.00Monroe County BOCCMonroe County's fair share library fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Police Facilities Impact Fee (Monroe County, Commercial)$0.00Monroe County BOCCMonroe County's police facilities impact fee (LDC Sec. 126-12) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Fire and EMS Impact Fee (Monroe County, Commercial)Requires confirmationMonroe County BOCCMonroe County collects fire and EMS facility impact fees within its impact fee districts (budget Fund 135); the rate is set outside the land development code.
- Transportation Impact Fee (Monroe County, Commercial)Requires confirmationMonroe County BOCCMonroe County fair share transportation impact fee, charged on new nonresidential development in unincorporated Monroe County per square foot of floor area (LDC Sec. 126-8) at a rate set by resolution of the Board of County Commissioners. The county's solid waste and police facilities impact fees have been $0.00 since January 1, 2018, and its park and library fees apply to residential development only.
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.
Unincorporated Monroe County: Industrial Impact Fees
Industrial development in unincorporated Monroe County pays no per-square-foot impact fees, but owes $25,229.00 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 $25,229.00. 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), Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection ($8,382.00 one-time) and Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 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.
Sewer System Development Charge (FKAA) is set by the utility and not published online. Transportation Impact Fee (Monroe County, Industrial) and Fire and EMS Impact Fee (Monroe County, Industrial) 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) — 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.
- Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection$8,382.00 one-timeKey Largo Wastewater Treatment DistrictOne-time Key Largo Wastewater Treatment District system impact charge for a nonresidential connection in Key Largo or Tavernier (east of Tavernier Creek, excluding Ocean Reef), shown at the minimum of 1 EDU: $2,987 per EDU for treatment plant capacity plus $1,757 per EDU for force main capacity, plus $3,638 per connection or the actual cost of connection, whichever is greater (KLWTD Resolution 09-2026, adopted August 4, 2026). One EDU corresponds to 167 gallons per day of potable water use; larger uses pay per EDU.
- 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 south of Mile Marker 87 (Cudjoe Regional, Big Coppitt, Conch and Duck Key, Long Key, Bay Point). Nonresidential charge is $227.00 per fixture value, effective October 1, 2026 (FY2027). FKAA also lists a one-time wastewater connection charge ($8,137 low pressure, $9,918 gravity). Key Largo and Tavernier are served by the Key Largo Wastewater Treatment District, Stock Island by KW Resort Utilities and Ocean Reef by North Key Largo Utility Corp.
- 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.
- Police Facilities Impact Fee (Monroe County, Industrial)$0.00Monroe County BOCCMonroe County's police facilities impact fee (LDC Sec. 126-12) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Library Impact Fee (Monroe County, Industrial)$0.00Monroe County BOCCMonroe County's fair share library fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Community Park Impact Fee (Monroe County, Industrial)$0.00Monroe County BOCCMonroe County's fair share park fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Solid Waste Impact Fee (Monroe County, Industrial)$0.00Monroe County BOCCMonroe County's solid waste impact fee (LDC Sec. 126-11) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Transportation Impact Fee (Monroe County, Industrial)Requires confirmationMonroe County BOCCMonroe County fair share transportation impact fee, charged on new nonresidential development in unincorporated Monroe County per square foot of floor area (LDC Sec. 126-8) at a rate set by resolution of the Board of County Commissioners. The county's solid waste and police facilities impact fees have been $0.00 since January 1, 2018, and its park and library fees apply to residential development only.
- Fire and EMS Impact Fee (Monroe County, Industrial)Requires confirmationMonroe County BOCCMonroe County collects fire and EMS facility impact fees within its impact fee districts (budget Fund 135); the rate is set outside the land development code.
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.
Unincorporated Monroe County: Office Impact Fees
Office development in unincorporated Monroe County pays no per-square-foot impact fees, but owes $25,229.00 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 $25,229.00. 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), Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection ($8,382.00 one-time) and Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 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.
Sewer System Development Charge (FKAA) is set by the utility and not published online. Fire and EMS Impact Fee (Monroe County, Office) and Transportation Impact Fee (Monroe County, Office) 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) — 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.
- Wastewater System Impact Charge (KLWTD) — 1 EDU, $2,987 + $1,757 per EDU + $3,638 per connection$8,382.00 one-timeKey Largo Wastewater Treatment DistrictOne-time Key Largo Wastewater Treatment District system impact charge for a nonresidential connection in Key Largo or Tavernier (east of Tavernier Creek, excluding Ocean Reef), shown at the minimum of 1 EDU: $2,987 per EDU for treatment plant capacity plus $1,757 per EDU for force main capacity, plus $3,638 per connection or the actual cost of connection, whichever is greater (KLWTD Resolution 09-2026, adopted August 4, 2026). One EDU corresponds to 167 gallons per day of potable water use; larger uses pay per EDU.
- 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 south of Mile Marker 87 (Cudjoe Regional, Big Coppitt, Conch and Duck Key, Long Key, Bay Point). Nonresidential charge is $227.00 per fixture value, effective October 1, 2026 (FY2027). FKAA also lists a one-time wastewater connection charge ($8,137 low pressure, $9,918 gravity). Key Largo and Tavernier are served by the Key Largo Wastewater Treatment District, Stock Island by KW Resort Utilities and Ocean Reef by North Key Largo Utility Corp.
- 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.
- Library Impact Fee (Monroe County, Office)$0.00Monroe County BOCCMonroe County's fair share library fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Community Park Impact Fee (Monroe County, Office)$0.00Monroe County BOCCMonroe County's fair share park fee is imposed on new residential development only, so it does not apply to nonresidential construction.
- Police Facilities Impact Fee (Monroe County, Office)$0.00Monroe County BOCCMonroe County's police facilities impact fee (LDC Sec. 126-12) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Solid Waste Impact Fee (Monroe County, Office)$0.00Monroe County BOCCMonroe County's solid waste impact fee (LDC Sec. 126-11) has been set at $0.00 since January 1, 2018 by the Board of County Commissioners.
- Fire and EMS Impact Fee (Monroe County, Office)Requires confirmationMonroe County BOCCMonroe County collects fire and EMS facility impact fees within its impact fee districts (budget Fund 135); the rate is set outside the land development code.
- Transportation Impact Fee (Monroe County, Office)Requires confirmationMonroe County BOCCMonroe County fair share transportation impact fee, charged on new nonresidential development in unincorporated Monroe County per square foot of floor area (LDC Sec. 126-8) at a rate set by resolution of the Board of County Commissioners. The county's solid waste and police facilities impact fees have been $0.00 since January 1, 2018, and its park and library fees apply to residential development only.
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 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.
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 $16,012.00 per unit in impact fees (rates sourced October 21, 2026). 4 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 $7,802.00 per unit in 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. Rates inside city limits depend on the municipality. Pick your city on this page.
How much are commercial impact fees in Monroe County?
Commercial development in unincorporated Monroe County pays no per-square-foot impact fees, but owes $25,229.00 in one-time water and sewer connection fees (assuming a 1-inch meter). 3 additional fees have no published standard amounts and are not included, so the full cost may be higher; verify before budgeting.
Does Key Largo pay Monroe County impact fees?
Yes. Key Largo is unincorporated, so new construction there pays the unincorporated Monroe County schedule on this page, not a city schedule. Search a specific address in the calculator below to confirm it sits outside every city limit.
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.