Marathon impact fees by project type
Marathon: Single-Family Impact Fees
A new single-family home in Marathon 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 Marathon) is set by the utility and not published online. County Impact Fees within Marathon (applicability) is set by the county and has no published standard rate. Transportation Impact Fee (City of Marathon) and Parks Impact Fee (City of Marathon) 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 Marathon 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 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 schedule each October 1.
- Sewer System Development/Capacity Fee (City of Marathon)Requires confirmationCity of MarathonThe City of Marathon operates its own area-wide wastewater utility (not FKAA). It publishes amortization schedules for its original assessment areas but no new-connection capacity/EDU fee, so no sewer system-development charge is shown.
- Transportation Impact Fee (City of Marathon)Requires confirmationCity of MarathonThe City of Marathon administers its own impact/fair-share fees (transportation, parks), having inherited certain fees from the county on incorporation. The current impact-fee amounts are not published online (the City's posted planning fee schedule lists application fees only), so no figure is shown.
- Parks Impact Fee (City of Marathon)Requires confirmationCity of MarathonThe City of Marathon levies a parks impact/fair-share fee on new development, inherited from Monroe County at its 1999 incorporation. The current amount is not published online (the City's posted planning fee schedule lists application fees only), so no figure is shown.
- County Impact Fees within Marathon (applicability)Requires confirmationMonroe County BOCCMonroe County's fair-share impact fees can reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon otherwise administers its own program. Whether Marathon has such an interlocal is not confirmed, and the county's fee amounts are set by unpublished resolution, 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.
Marathon: Multifamily Impact Fees
A new multifamily unit in Marathon 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 Marathon, MF) is set by the utility and not published online. County Impact Fees within Marathon (applicability, MF) is set by the county and has no published standard rate. Transportation Impact Fee (City of Marathon, MF) and Parks Impact Fee (City of Marathon, 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 Marathon 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 Marathon, MF)Requires confirmationCity of MarathonThe City of Marathon operates its own area-wide wastewater utility (not FKAA). It publishes amortization schedules for its original assessment areas but no new-connection capacity/EDU fee, so no multifamily sewer system-development charge is shown.
- Transportation Impact Fee (City of Marathon, MF)Requires confirmationCity of MarathonThe City of Marathon administers its own impact/fair-share fees (transportation, parks). The current multifamily amounts are not published online (the City's posted planning fee schedule lists application fees only), so no figure is shown.
- Parks Impact Fee (City of Marathon, MF)Requires confirmationCity of MarathonThe City of Marathon levies a parks impact/fair-share fee on new development, inherited from Monroe County at its 1999 incorporation. The current amount is not published online (the City's posted planning fee schedule lists application fees only), so no figure is shown.
- County Impact Fees within Marathon (applicability, MF)Requires confirmationMonroe County BOCCMonroe County's fair-share impact fees can reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon otherwise administers its own program. Whether Marathon has such an interlocal is not confirmed, and the county's fee amounts are set by unpublished resolution, 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.
Marathon: Commercial Impact Fees
Commercial development in Marathon pays no per-square-foot impact fees (rates sourced August 15, 2026).
Sewer System Development/Capacity Fee (City of Marathon) and Water System Development Charge (FKAA) are set by the utility and not published online. City Impact Fees (City of Marathon, Commercial) 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 Marathon 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/Capacity Fee (City of Marathon)Requires confirmationCity of Marathon
- City Impact Fees (City of Marathon, Commercial)Requires confirmationCity of Marathon
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.
Marathon: Industrial Impact Fees
Industrial development in Marathon pays no per-square-foot impact fees (rates sourced August 15, 2026).
Sewer System Development/Capacity Fee (City of Marathon) and Water System Development Charge (FKAA) are set by the utility and not published online. City Impact Fees (City of Marathon, Industrial) 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 Marathon 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/Capacity Fee (City of Marathon)Requires confirmationCity of Marathon
- City Impact Fees (City of Marathon, Industrial)Requires confirmationCity of Marathon
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.
Marathon: Office Impact Fees
Office development in Marathon pays no per-square-foot impact fees (rates sourced August 15, 2026).
Sewer System Development/Capacity Fee (City of Marathon) and Water System Development Charge (FKAA) are set by the utility and not published online. City Impact Fees (City of Marathon, Office) 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 Marathon 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/Capacity Fee (City of Marathon)Requires confirmationCity of Marathon
- City Impact Fees (City of Marathon, Office)Requires confirmationCity of Marathon
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.
Marathon 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.
New to impact fees? Our plain-English guide explains what they cover, who pays them, and why they exist.
Marathon impact fee FAQs
What are the total impact fees for a single-family home in Marathon, Florida?
A new single-family home in Marathon pays at least $5,279.00 per unit in combined impact fees (rates sourced August 15, 2026). 4 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 Marathon?
Marathon does not currently levy impact fees on commercial development.
Does Marathon charge its own impact fees?
Yes. Marathon levies its own municipal impact or utility fees, and county-levied fees also apply inside city limits. The schedule on this page shows every fee that applies to development in Marathon, with the combined total.
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.