Tankless Water Heater Installation Cost in Mesa, AZ
Based on 53 tankless water heater installation building permits filed in Mesa between 2016 and 2025, the typical declared project value is $4,190, with most landing between $1,800 and $5,256. These are real records from Mesa's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Tankless Water Heater Installation values over time in Mesa
Median declared value moved from $4,800 in 2021 to $5,106 in 2025, up 6% over that span. Each year below is computed from the filings that actually cleared in Mesa.
Recent tankless water heater installation permits in Mesa
Actual filings from Mesa's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2025-12-10 | $1,800 | Install a new gas meter set. Installing a tankless water heater. |
| 2025-07-21 | $5,256 | Replace tank gas water heater with tankless gas water heater at existing SFR |
| 2025-04-17 | $4,250 | Add natural gas line to existing line for a gas stove in the kitchen. Connected to 1.5-inc |
| 2025-03-27 | $2,000 | New from street gas meter and 1 1/2" polyethylene plastic pipe. 292000 Total BTU. Stove-Ta |
| 2025-03-25 | $4,955 | Exchange tank gas water heater with tankless water heater. No deferred or special inspecti |
| 2025-02-28 | $5,380 | replace tank gas water heater with tankless gas water heater like for like in garage |
| 2025-02-03 | $10,000 | Above ground gas piping 1 1/4" black steel schedule 40 through attic. Total run of 123 fe |
| 2025-01-16 | $9,000 | REMODEL EXISTING BATHROOM/BEDROOM, REMOVE EXISTING WINDOW REPLACE WITH 72 INCH X 80 INCH T |
| 2024-10-09 | $15,000 | Water heater room remodel into a bathroom and relocate the water heater to be changed to t |
| 2024-10-07 | $12,000 | INSTALLATION OF PE GASLINE FOR (2) TANKLESS WATER HEATERS, FUTURE POOL HEATER, AND OUTDOOR |
| 2024-03-20 | $800 | P.E. GAS LINE TO 160K BTU TANKLESS WATER HEATER, TO BE RUN 110' OF 1". ALL TO BE 18" UND |
| 2024-03-13 | $3,640 | replace gas tanked water heater with NNPE240S2NG-NAVIEN 11.1 GPM 199K BTU NG/LP TANKLESS w |
| 2024-02-01 | $2,000 | Adding a T at the city gas main in order to bring a gas supply/meter. Gas intended to be u |
| 2024-01-10 | $4,678 | REPLACE GAS TANKED WH WITH NNPE240A2NG-NAVIEN 11.2 GPM NG/LP CONDENSING TANKLESS INDOOR/OU |
| 2023-11-22 | $9,000 | Tankless water heater and replacement of existing gas line for stove to accommodate new ta |
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Add your price →How to read these numbers
A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What tankless water heater installation actually costs in Mesa comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Mesa's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Mesa homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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