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Marathon, Florida Impact Fees

Marathon applies its own fee schedule: municipal fees plus the Monroe County-levied fees that apply inside city limits. Combined, a new single-family home pays at least $11,695.04 per unit (rates sourced ). 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. The full breakdown is below.

Marathon Impact Fees by Project Type

Marathon: Single-Family Impact Fees

A new single-family home in Marathon pays at least $11,695.04 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 Transportation Impact Fee (City of Marathon) — 2,000 sq ft × $0.88/sq ft ($1,760.00).

Public Safety Impact Fee (City of Marathon) — 2,000 sq ft × $0.56/sq ft and Parks Impact Fee (City of Marathon) — 2,000 sq ft × $0.56/sq ft 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 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. 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$7,630.00
  • Water System Development Charge (FKAA)
    5/8 in. x 3/4 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $5,722.00
  • Water Tapping Fee (FKAA) — 5/8 in. x 3/4 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $1,908.00
Sewer$0.00
  • Sewer System Development/Capacity Fee (City of Marathon)
    City of Marathon
    The 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.
    Requires confirmation
City$4,065.04
  • Transportation Impact Fee (City of Marathon) — 2,000 sq ft × $0.88/sq ft
    City of Marathon
    City of Marathon roads impact fee of $0.88 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 2,000 sq ft home. The roads rate is unchanged in the schedule's 2027 to 2029 tables.
    $1,760.00
  • Public Safety Impact Fee (City of Marathon) — 2,000 sq ft × $0.56/sq ft
    City of Marathon
    City of Marathon public safety impact fee of $0.56 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 2,000 sq ft home. The schedule steps the rate to $0.62, $0.68 and $0.74 per sq ft in its 2027, 2028 and 2029 tables.
    $1,120.00Requires confirmation
  • Parks Impact Fee (City of Marathon) — 2,000 sq ft × $0.56/sq ft
    City of Marathon
    City of Marathon parks impact fee of $0.56 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 2,000 sq ft home. The schedule steps the rate to $0.62, $0.68 and $0.74 per sq ft in its 2027, 2028 and 2029 tables.
    $1,120.00Requires confirmation
  • Solid Waste Impact Fee (City of Marathon)
    City of Marathon
    City of Marathon solid waste impact fee of $65.04 per residential unit (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026); the rate is the same in the schedule's 2027 to 2029 tables.
    $65.04
County$0.00
  • County Impact Fees within Marathon (applicability)
    Monroe County BOCC
    Monroe County's fair-share impact fees reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon administers its own impact-fee program, and absent such an agreement the county fees are not collected within Marathon. The county's fee amounts are set by separate resolution that is not published online, so no amount is shown.
    Requires confirmation
Total (Marathon): $11,695.04
Sources last checked Official fee schedules:Florida Keys Aqueduct Authority City of Marathon Monroe County BOCC
Amounts flagged "Requires confirmation" are the last published figures, included in the totals. Confirm them with the jurisdiction or utility before budgeting.

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 $5,123.04 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), Transportation Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.88/sq ft ($880.00) and Solid Waste Impact Fee (City of Marathon, MF) ($65.04).

Public Safety Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.56/sq ft, Water SDC (FKAA, MF 4+ units) — 10 FV × $115/FV, and Parks Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.56/sq ft 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 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. 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$3,058.00
  • Water Tapping Fee (FKAA, MF) — 5/8 in. x 3/4 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $1,908.00
  • Water SDC (FKAA, MF 4+ units) — 10 FV × $115/FV
    Florida Keys Aqueduct Authority
    One-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.
    $1,150.00Requires confirmation
Sewer$0.00
  • Sewer SDC/Capacity Fee (City of Marathon, MF)
    City of Marathon
    The 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.
    Requires confirmation
City$2,065.04
  • Transportation Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.88/sq ft
    City of Marathon
    City of Marathon roads impact fee of $0.88 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 1,000 sq ft apartment. The roads rate is unchanged in the schedule's 2027 to 2029 tables.
    $880.00
  • Public Safety Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.56/sq ft
    City of Marathon
    City of Marathon public safety impact fee of $0.56 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 1,000 sq ft apartment. The schedule steps the rate to $0.62, $0.68 and $0.74 per sq ft in its 2027, 2028 and 2029 tables.
    $560.00Requires confirmation
  • Parks Impact Fee (City of Marathon, MF) — 1,000 sq ft × $0.56/sq ft
    City of Marathon
    City of Marathon parks impact fee of $0.56 per square foot for all residential development (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026). Shown for a 1,000 sq ft apartment. The schedule steps the rate to $0.62, $0.68 and $0.74 per sq ft in its 2027, 2028 and 2029 tables.
    $560.00Requires confirmation
  • Solid Waste Impact Fee (City of Marathon, MF)
    City of Marathon
    City of Marathon solid waste impact fee of $65.04 per residential unit (Resolution 2026-43, Impact Fee Schedule 2026, effective May 12, 2026); the rate is the same in the schedule's 2027 to 2029 tables.
    $65.04
County$0.00
  • County Impact Fees within Marathon (applicability, MF)
    Monroe County BOCC
    Monroe County's fair-share impact fees reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon administers its own impact-fee program, and absent such an agreement the county fees are not collected within Marathon. The county's fee amounts are set by separate resolution that is not published online, so no amount is shown.
    Requires confirmation
Total (Marathon): $5,123.04
Sources last checked Official fee schedules:Florida Keys Aqueduct Authority City of Marathon Monroe County BOCC
Amounts flagged "Requires confirmation" are the last published figures, included in the totals. Confirm them with the jurisdiction or utility before budgeting.

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 $3.24 per square foot in impact fees, plus $16,847.00 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 $178,747.00. 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), Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 one-time) and Transportation Impact Fee (City of Marathon, Commercial) ($2.71/sq ft).

Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.

Public Safety Impact Fee (City of Marathon, Commercial) 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 System Development/Capacity Fee (City of Marathon) is set by the utility and not published online. County Impact Fees within Marathon (Monroe County, Commercial) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.

View the Full Marathon Impact Fee Schedule
Water$16,847.00 one-time
  • Water System Development Charge (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $14,304.00 one-time
  • Water Tapping Fee (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $2,543.00 one-time
Sewer$0.00
  • Sewer System Development/Capacity Fee (City of Marathon)
    City of Marathon
    The City of Marathon operates its own wastewater utility; its code sets the one-time system development charge by annual assessment resolution, and no current nonresidential charge is published.
    Requires confirmation
City$3.24/sq ft
  • Transportation Impact Fee (City of Marathon, Commercial)
    City of Marathon
    City of Marathon roads impact fee for general retail, $2.71 per sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The roads rate is the same in the 2026 through 2029 schedules.
    $2.71/sq ft
  • Public Safety Impact Fee (City of Marathon, Commercial)
    City of Marathon
    City of Marathon public safety impact fee for nonresidential floor area, $0.27 per sq ft in the 2026 schedule of Resolution 2026-43 (adopted May 12, 2026), phasing to $0.30, $0.33 and $0.36 per sq ft in the 2027, 2028 and 2029 schedules.
    $0.27/sq ftRequires confirmation
  • Solid Waste Impact Fee (City of Marathon, Commercial) — $25.80 per 100 sf
    City of Marathon
    City of Marathon solid waste impact fee for general retail, $25.80 per 100 sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The rate is the same in the 2026 through 2029 schedules.
    $0.26/sq ft
  • Parks Impact Fee (City of Marathon, Commercial)
    City of Marathon
    The City of Marathon's parks impact fee applies to residential and tourist units only, so it does not apply to nonresidential construction.
    $0.00
County$0.00
  • County Impact Fees within Marathon (Monroe County, Commercial)
    Monroe County BOCC
    Monroe County's fair-share impact fees reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon administers its own impact fee program, and absent such an agreement the county fees are not collected within Marathon.
    Requires confirmation
Total (Marathon): $3.24/sq ft + $16,847.00 one-time (≈ $178,747.00 at 50,000 sq ft)
Sources last checked Official fee schedules:Florida Keys Aqueduct Authority City of Marathon Monroe County BOCC
Amounts flagged "Requires confirmation" are the last published figures, included in the totals. Confirm them with the jurisdiction or utility before budgeting.
Water/sewer connection fees assume a 1-inch meter; larger services pay more.

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.

Marathon: Industrial Impact Fees

Industrial development in Marathon pays $0.85 per square foot in impact fees, plus $16,847.00 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 $59,297.00. 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), Water Tapping Fee (FKAA) — 1 in. meter ($2,543.00 one-time) and Transportation Impact Fee (City of Marathon, Industrial) ($0.45/sq ft).

Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.

Public Safety Impact Fee (City of Marathon, Industrial) 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 System Development/Capacity Fee (City of Marathon) is set by the utility and not published online. County Impact Fees within Marathon (Monroe County, Industrial) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.

View the Full Marathon Impact Fee Schedule
Water$16,847.00 one-time
  • Water System Development Charge (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $14,304.00 one-time
  • Water Tapping Fee (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $2,543.00 one-time
Sewer$0.00
  • Sewer System Development/Capacity Fee (City of Marathon)
    City of Marathon
    The City of Marathon operates its own wastewater utility; its code sets the one-time system development charge by annual assessment resolution, and no current nonresidential charge is published.
    Requires confirmation
City$0.85/sq ft
  • Transportation Impact Fee (City of Marathon, Industrial)
    City of Marathon
    City of Marathon roads impact fee for general industrial, $0.45 per sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The roads rate is the same in the 2026 through 2029 schedules.
    $0.45/sq ft
  • Public Safety Impact Fee (City of Marathon, Industrial)
    City of Marathon
    City of Marathon public safety impact fee for nonresidential floor area, $0.27 per sq ft in the 2026 schedule of Resolution 2026-43 (adopted May 12, 2026), phasing to $0.30, $0.33 and $0.36 per sq ft in the 2027, 2028 and 2029 schedules.
    $0.27/sq ftRequires confirmation
  • Solid Waste Impact Fee (City of Marathon, Industrial) — $12.90 per 100 sf
    City of Marathon
    City of Marathon solid waste impact fee for general industrial, $12.90 per 100 sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The rate is the same in the 2026 through 2029 schedules.
    $0.13/sq ft
  • Parks Impact Fee (City of Marathon, Industrial)
    City of Marathon
    The City of Marathon's parks impact fee applies to residential and tourist units only, so it does not apply to nonresidential construction.
    $0.00
County$0.00
  • County Impact Fees within Marathon (Monroe County, Industrial)
    Monroe County BOCC
    Monroe County's fair-share impact fees reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon administers its own impact fee program, and absent such an agreement the county fees are not collected within Marathon.
    Requires confirmation
Total (Marathon): $0.85/sq ft + $16,847.00 one-time (≈ $59,297.00 at 50,000 sq ft)
Sources last checked Official fee schedules:Florida Keys Aqueduct Authority City of Marathon Monroe County BOCC
Amounts flagged "Requires confirmation" are the last published figures, included in the totals. Confirm them with the jurisdiction or utility before budgeting.
Water/sewer connection fees assume a 1-inch meter; larger services pay more.

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.

Marathon: Office Impact Fees

Office development in Marathon pays $1.64 per square foot in impact fees, plus $16,847.00 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 $57,959.50. 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 Transportation Impact Fee (City of Marathon, Office) ($1.31/sq ft).

Water and sewer connection fees assume a 1-inch meter; larger services pay more. See the meter-size tiers in the source schedules.

Public Safety Impact Fee (City of Marathon, Office) 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 System Development/Capacity Fee (City of Marathon) is set by the utility and not published online. County Impact Fees within Marathon (Monroe County, Office) is set by the county and has no published standard rate. Contact the levying jurisdiction or utility to verify before budgeting; they are not included as dollar figures here.

View the Full Marathon Impact Fee Schedule
Water$16,847.00 one-time
  • Water System Development Charge (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $14,304.00 one-time
  • Water Tapping Fee (FKAA) — 1 in. meter
    Florida Keys Aqueduct Authority
    One-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.
    $2,543.00 one-time
Sewer$0.00
  • Sewer System Development/Capacity Fee (City of Marathon)
    City of Marathon
    The City of Marathon operates its own wastewater utility; its code sets the one-time system development charge by annual assessment resolution, and no current nonresidential charge is published.
    Requires confirmation
City$1.64/sq ft
  • Transportation Impact Fee (City of Marathon, Office)
    City of Marathon
    City of Marathon roads impact fee for general office, $1.31 per sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The roads rate is the same in the 2026 through 2029 schedules.
    $1.31/sq ft
  • Public Safety Impact Fee (City of Marathon, Office)
    City of Marathon
    City of Marathon public safety impact fee for nonresidential floor area, $0.27 per sq ft in the 2026 schedule of Resolution 2026-43 (adopted May 12, 2026), phasing to $0.30, $0.33 and $0.36 per sq ft in the 2027, 2028 and 2029 schedules.
    $0.27/sq ftRequires confirmation
  • Solid Waste Impact Fee (City of Marathon, Office) — $6.45 per 100 sf
    City of Marathon
    City of Marathon solid waste impact fee for general office, $6.45 per 100 sq ft of floor area, under Resolution 2026-43 (adopted May 12, 2026, effective on adoption). The rate is the same in the 2026 through 2029 schedules.
    $0.06/sq ft
  • Parks Impact Fee (City of Marathon, Office)
    City of Marathon
    The City of Marathon's parks impact fee applies to residential and tourist units only, so it does not apply to nonresidential construction.
    $0.00
County$0.00
  • County Impact Fees within Marathon (Monroe County, Office)
    Monroe County BOCC
    Monroe County's fair-share impact fees reach an incorporated municipality only through an interlocal agreement with the county (LDC Sec. 126-4(e)(2)); Marathon administers its own impact fee program, and absent such an agreement the county fees are not collected within Marathon.
    Requires confirmation
Total (Marathon): $1.64/sq ft + $16,847.00 one-time (≈ $57,959.50 at 25,000 sq ft)
Sources last checked Official fee schedules:Florida Keys Aqueduct Authority City of Marathon Monroe County BOCC
Amounts flagged "Requires confirmation" are the last published figures, included in the totals. Confirm them with the jurisdiction or utility before budgeting.
Water/sewer connection fees assume a 1-inch meter; larger services pay more.

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.

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 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.

New to impact fees? Our plain-English guide explains what they cover, who pays them, and why they exist.

Summary current as of September 2026. This is an editorial summary, not legal advice; see the official statute text and our terms of use.

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 $11,695.04 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 Marathon?

Commercial development in Marathon pays $3.24 per square foot in impact fees, plus $16,847.00 in one-time water and sewer connection fees (assuming a 1-inch meter), at least $178,747.00 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 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.

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