Plumbing Services in Louisville, KY: Hiring Guide

Describe the problem before requesting a quote

Tell the plumber which fixture or pipe needs attention, when you noticed the problem, and whether it happens during water use or rain. Send photos of the affected area and the access route. For a water heater, include a photo of its label and connections. Ask what the plumber needs to inspect before offering a replacement price.

For a recurring drain problem, request a diagnosis and ask what finding would justify cleaning, repair or replacement. For a concealed leak, ask how the contractor will locate it and who will open and restore the wall or floor. Agree on the charge for investigation and the point at which the plumber must seek approval for more work.

Confirm permits and the responsible master plumber

Kentucky requires plumbing permits for new installations; moving or relocating a fixture, soil or waste opening, or conductor; new or replacement house sewers and water services; adding a backflow prevention device to an existing water service; and new or replacement water heaters. It exempts repairs to leaks, cocks and valves, plus cleaning waste or sewer pipes. Ask the plumber to identify the permit category for your exact scope. [1]

The state issues plumbing installation permits to a licensed master plumber or to a homeowner who meets its personal-residential-use and other conditions. When a journeyman constructs, installs or alters plumbing, sewerage or drainage, Kentucky requires the journeyman to work under the supervision of a licensed master plumber with a valid permit. For hired installation work, request the responsible master plumber's name and license number, evidence of insurance, and written responsibility for permit handling and inspections. [1]

Ask for the permit number before permitted work starts and keep the inspection documentation with your invoice. If you change contractors during an installation, ask how the incoming master plumber will handle the takeover. Kentucky requires a new permit when a master plumber takes over an installation permitted to another master plumber or homeowner. [1]

Separate government fees from the job price

For a single domestic water heater installed or replaced within one building, Kentucky lists a $50 plumbing permit fee. For general one- and two-family residential installations, it lists a $50 base fee plus $14 for each applicable item specified in the regulation. The single-water-heater rule is a separate fee provision, so ask the contractor which calculation applies. [1]

Request separate amounts for labor, equipment, materials, government fees and any contractor charge for arranging the permit. Ask whether the quote covers removal, access work, restoration and return visits. For planned work, compare written quotes using the same fixture model and scope. For urgent work, agree on the immediate repair and request separate approval for broader replacement.

Check utility assistance before outdoor excavation

Louisville Water says homes typically built during or before 1950 may retain private lead or galvanized service lines. It identifies these customer-side lines as the homeowner's responsibility and offers a private service-line lookup. Use the property information to start an inquiry rather than assuming the pipe material from the home's age. [2]

Louisville Water offers full replacement of outdoor lead or galvanized service lines through its program and free water testing for customers concerned about lead. Contact the utility at (502) 569-0898 to discuss testing or the replacement program before signing a private excavation contract. The utility says contact to schedule replacement may take several months; ask how to handle any current repair need while you wait. [2]

For a private quote, ask the plumber to define the replacement endpoints, excavation route and restoration responsibilities. Confirm whether the proposed work includes indoor piping or only the outdoor service line. Keep the utility's response alongside the contractor's scope so you can identify overlapping work.

Ask MSD about basement drainage before changing connections

MSD says basement sump-pump connections to sewer pipes are illegal and can contribute to backups and overflows. Its Private Property Illicit Discharge Program can pay a limited amount for voluntary disconnection and redirection. Contact program staff at (502) 540-6600 before arranging work, and ask about assessment, the approved scope and your share of any cost. [3]

MSD describes an initial basement inspection and provides information for arranging a licensed contractor when staff determine that disconnection is needed and feasible. Staff inspect the completed work. After the work passes inspection, the program pays the contractor directly. Get confirmation of the payment limit and process before accepting a quote. [3]

For basement flooding, MSD's preparedness page also points residents to its free Plumbing Modification Program. That page does not explain eligibility or the covered work. Ask MSD whether the program applies to your property before commissioning backup-prevention modifications, and ask your plumber to explain the suspected cause before recommending equipment. [4]

Kentucky plumbing permit fees and per-item charges

Choose the next step for your plumbing job

Your hiring checklist

1. Photograph the problem area, fixture label and access route.
2. Describe when the problem occurs and what you have observed.
3. Agree on the diagnostic charge and approval limit for additional work.
4. Request the responsible master plumber's name, license number and evidence of insurance.
5. Ask who will arrange any required permit and inspections.
6. Contact the relevant utility program before approving service-line or basement drainage changes.
7. Compare labor, materials, access, disposal and restoration within the same written scope.
8. Keep the final invoice, warranty terms and any permit or inspection records.

Frequently Asked Questions

Does replacing a water heater require a permit?

Yes. Kentucky requires a plumbing permit for a new or replacement water heater. If the work consists of installing or replacing only one domestic water heater within a single building, the regulation lists a $50 permit fee. Ask the contractor to identify any separate administrative charges. [1]

Can I perform permitted plumbing work in my own home?

Kentucky allows homeowner permits under specific conditions, including personal residential use, an application before work begins, an affidavit and personal performance of the work. Review the full requirements with the permitting authority before choosing this route. [1]

Who should I contact about a possible lead service line?

Start with Louisville Water's private service-line lookup and call (502) 569-0898. The utility offers free testing for lead concerns and an outdoor lead or galvanized service-line replacement program. Confirm the property's status and scheduling before approving private replacement. [2]

Will MSD pay for sump-pump disconnection?

MSD says it can pay up to a limited amount for voluntary disconnection and redirection through its Private Property Illicit Discharge Program. Staff assess the connection, and the completed work must pass inspection before MSD pays the contractor. Ask about the limit and any remaining owner cost before work starts. [3]