Most Lexington homeowners replace a water heater after the tank leaks, the hot water turns rusty, or an older unit keeps needing parts. Lexington is unusual because the City runs its own natural gas system, and permits start at the City's online Permit Portal. Call the number on this page to be connected with a local plumber in Lexington.
Why Lexington is its own case
The City of Lexington owns its water, sewer, electric and natural gas systems, and its gas lines reach customers across much of Davidson County. For a gas water heater inside the city, the gas side ties to Lexington Utilities rather than Piedmont Natural Gas, which serves only portions of the county. If you smell gas, leave the house and call 911 or the City's gas utility from outside.
The housing is old. Survey figures show a median year built of 1969, about 68% of homes from before 1980 and roughly 14% from before 1940, much of it in the Uptown, Erlanger Mill Village and residential historic districts. Replacements in these houses often involve aging supply pipe, basements or closets with tight clearances and flue connections that need updating.
Permits begin with the City's Business and Community Development permitting staff, who publish a plumbing permit process sheet and take applications online. The City's pages don't say whether the City or Davidson County performs the trade inspection, so let the plumber confirm that when applying. City water is chlorinated and drawn from Lake Thom-A-Lex, with no violations in the 2025 report.
Comparing replacement options
| Option | Good fit when | Things to plan for |
|---|---|---|
| Gas tank, same size | The home already has City gas service to the heater | Vent and gas connector checked against current code |
| Electric tank | No gas at the house, or a simpler install is preferred | A properly sized circuit and breaker |
| Tankless gas | Steady demand and room to run new venting | Larger gas line and a confirmation of supply with the City |
| Heat pump electric | Garage or basement with enough air space | Condensate drain and more height than a standard tank |
Signs to replace instead of repair
- Water coming from the tank body rather than a fitting
- Rust-colored hot water while the cold side stays clear
- Popping noises that keep returning after a flush
- A tank past roughly ten to twelve years with a fresh failure
Timing notes
Winter is when weak heaters tend to give out, because colder incoming water makes them work harder. If yours is near the end of its life, replacing it in spring or fall gives you time to compare options and line up the permit instead of scrambling on a cold morning with no hot water.
Water Heater Replacement questions in Lexington
Who supplies natural gas here, and what should I do if I smell gas?
Who issues the permit for a replacement water heater in this area?
What surprises come up when replacing a heater in an older house?
Can the new heater be installed somewhere other than where the old one sat?
More plumbing services in Lexington
Water Heater Replacement nearby
Helpful guides
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