Louisville Water & MSD Sewer Connection Fees (2026)

In Louisville, two separate agencies connect a new house. Louisville Water Company supplies the water, and the Louisville/Jefferson County Metropolitan Sewer District (MSD) runs the sewers. For a new single-family home on a standard 3/4-inch service, Louisville Water’s 2026 tariff sets a $1,475 service installation fee and a $350 System Development Charge, for $1,825 in published water charges (Louisville Water 2026 tariff). MSD does not publish a flat sewer tap fee. Its connection fee is the actual cost of building the sewer connection plus $250, and its capacity charge is a per-gallon formula billed to developers (MSD schedule, effective Sept. 1, 2026). The caveat that matters most is how your street’s water main was paid for. If Louisville Water built the main at its own expense, or a developer built it under a tapping-fee contract, a tapping fee ($5,450 on the 2026 schedule) can apply on top. For how this compares nationally, see our guide to the cost to connect to city water.

Louisville connection fees at a glance

Louisville Water’s rows come from its 2026 tariff, effective January 1, 2026. MSD’s come from its Jefferson County schedule, effective September 1, 2026. Louisville Water prices by meter size, and 3/4 inch is its smallest domestic size. Rows marked as not typical, such as the tapping fee, the builder bond and the developer-paid MSD charges, apply only in the situations their notes describe. MSD rows with a formula and no dollar amount depend on MSD’s own flow estimate for the project.

Worked example for a single-family home in Louisville

Assumptions: one house, a 3/4-inch domestic service, typical installation conditions (no rock, no multi-lane road crossing) and no irrigation meter. The water side is fixed by the tariff. The sewer side depends on how the lot gets sewer service, so the table shows three common cases.

Published Louisville connection charges for one house, by situation (sources: Louisville Water 2026 tariff, MSD rates, rentals and charges, Sept. 1, 2026). Construction cost of the sewer connection not included.

Case A assumes the developer built the sewers under an MSD Lateral Extension contract, which exempts the lot from MSD’s connection fee, and that the water main was not a tapping-fee main. In that case the developer also paid MSD’s capacity and inflow-and-infiltration charges when it signed the sewer extension contract, and those costs are usually built into the lot price. For infill lots (cases B and C), MSD’s schedule applies its inflow-and-infiltration charge ($1 per gallon per day, $400 minimum per project) to individuals as well as developers who connect to its separate sanitary sewer, due with any capacity charge, so ask MSD whether either charge applies. Properties inside the 1946 City of Louisville boundaries are exempt from the capacity charge. In case C, Service Rule 3.01.6 refers to the tapping fee applicable when the main was installed, so confirm the amount for your street with Service Applications. A 1-inch water service raises the water figures to $1,975 plus $600, or $2,575, which is $750 more than the 3/4-inch service. MSD’s single-family permit review ($250, pending confirmation) would add to every case.

Costs outside the Louisville fee schedule

Louisville Water’s installation fee pays for the service line from the main to your property or easement line, the meter and its vault. MSD’s connection is built to the property or easement line. Everything from those points to the house is private work, which the fees above do not cover:

• Water service line from the meter vault to the house: $30 to $150 per foot, about $50 typical, installed including the trench (national estimate).
• Sewer lateral from the house to MSD’s connection: $50 to $250 per foot, about $100 typical, installed including the trench (national estimate).
• Construction cost of a new MSD property service connection on an infill lot (case B and C above). MSD bills the actual cost, and the connection must be built by a qualified contractor under MSD inspection.
• Plumbing permit from the Kentucky Division of Plumbing, which Louisville Water requires before it will install a service. We do not track that fee here.

For example, 60 feet of water line at $50 and 60 feet of sewer lateral at $100 add about $9,000 in private work. These are national benchmark figures, not Louisville quotes. See water service line cost and sewer lateral cost for detail, and model your own lot here:

How and when Louisville fees are paid

• Water fees are due with the application. Louisville Water’s Service Applications department needs a signed application, a Division of Plumbing permit and a plot plan, and fees are paid when you apply. The application form says all fees must be confirmed by a Service Applications associate before the application is accepted.
• Louisville Water installs the service. The meter goes in a vault in the right-of-way or easement near your property line. For non-typical jobs, such as rock or a multi-lane road, it can charge actual cost instead of the flat fee.
• MSD’s connection cost is paid first. MSD requires the connection cost to be paid before the connection is installed. Its Customer Service Department (502-540-6000) can tell you whether a property service connection already exists and whether required fees have been paid. New connections also need MSD’s Downstream Facilities Capacity Request form.
• Bonds for lots outside a bonded subdivision. MSD requires a $2,500 builder bond when a house is built on a lot that is not already under an MSD bond. It is released after construction is finished and the site is stabilized. A separate $1,000 bond applies near a mapped floodplain.

Louisville vs. Nashville

The two cities charge for connections in different ways. Metro Nashville charges small flat tap fees ($500 for a 5/8-inch water tap, $360 for a sewer connection) plus capacity charges of $3,675 per 350-gallon-per-day unit. At one unit that comes to $4,535, and every added unit adds $3,675. Louisville charges a larger flat installation fee but a much smaller system charge, so its published water total for a subdivision lot is $1,825. Its sewer capacity cost is billed to developers rather than to each lot, which is why it is missing from case A.

Upcoming changes in Louisville

Louisville Water’s fees are set by calendar year. The 2026 tariff was presented to the Board of Water Works on December 16, 2025 and took effect January 1, 2026, and its service rules say the tapping fee schedule is reviewed every year. Check for a 2027 tariff before you pay in January. MSD’s schedule changed on September 1, 2026. It restates the connection-fee and capacity-charge rules but still does not print the per-gallon capacity value, which MSD resets each calendar year from its audited net worth. MSD’s development-charge chart is dated 2021. It marks the $250 single-family permit charge “Effective TBD,” and MSD’s 2021 FAQ says building-permit charges started January 1, 2022. Confirm that figure at MSD’s customer counter.

Electric line extensions by utilities regulated by the Kentucky Public Service Commission follow a statewide free-footage rule. See electric line extension free footage.

Louisville connection fee questions

Related guides for Louisville

For another city-run utility in the region, see Richmond DPU water and sewer connection charges.

Compare Louisville with Nashville, Murfreesboro, Columbus and Charlotte, or see the full tap fees by city table. Related guides: tap fee vs. impact fee, sewer connection cost, water meter installation cost and the utility connection cost calculator.

Louisville fee sources

• 2026 Tariff, Rate Schedule, and Customer Fees and Charges, Louisville Water Company. Checked Sep 24, 2026.
• 2026 Service Rules and Regulations, Louisville Water Company. Checked Sep 24, 2026.
• 2026 Service Application and New Service Fee Schedule, Louisville Water Company. Checked Sep 24, 2026.
• Jefferson County Schedule of Rates, Rentals and Charges, effective September 1, 2026, Louisville MSD. Checked Sep 24, 2026.
• Development and Stormwater Services Charges, effective July 1, 2021, Louisville MSD. Checked Sep 24, 2026.
• Single Family, Small Commercial or Demolition Permit, Louisville MSD. Checked Sep 24, 2026.
• National cost estimates: Utility Cost Guide benchmark methodology.