Tankless Water Heater Installation Cost in Mill Valley, CA
Based on 150 tankless water heater installation building permits filed in Mill Valley between 2015 and 2026, the typical declared project value is $5,300, with most landing between $3,238 and $8,000. These are real records from Mill Valley'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 Mill Valley
Median declared value moved from $3,050 in 2020 to $4,824 in 2025, up 58% over that span. Each year below is computed from the filings that actually cleared in Mill Valley.
Recent tankless water heater installation permits in Mill Valley
Actual filings from Mill Valley's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-01-06 | $13,000 | Remove 50 gallon water heater & install a Navien 240A tankless water heater with a dedicat |
| 2025-12-07 | $4,685 | Remove(E)NG Tankless located in the crawlspace- Install(N)NG Tankless in new loc- on right |
| 2025-12-05 | $15,000 | Interior kitchen remodel. Removal of non-structural partition walls. Replace (E) water hea |
| 2025-11-24 | $4,000 | WATER HEATER REPLACEMENT- FROM TANK TO TANKLESS Remove old 40 gallon tank water heater fro |
| 2025-11-06 | $2,000 | Removed failed existing NG WH located in the basement area- Install New TANKLESS NG WH in |
| 2025-11-04 | $2,000 | Remove (E) NG WH in basement- Install (N) TANKLESS NG WH in same location |
| 2025-10-23 | $5,000 | REPLACE EXISTING TANKLESS WATER HEATER WITH NEW IN SAME LOCATION |
| 2025-10-15 | $4,824 | Rem (E) 40G NG tanked WH located in basement. Install (N) NG tankless WH in same location, |
| 2025-10-09 | $8,000 | Remove & replace tankless water heater like for like. |
| 2025-08-27 | $13,000 | Remove tank water heater & install a tankless unit with a dedicated gas line. |
| 2025-08-22 | $3,480 | Remove (E) NG Tanked Water Heater located in crawlspace. Install (N) NG Tankless WH in sam |
| 2025-08-13 | $13,000 | Remove 50 gallon water heater and install a Navien 240A tankless water heater with a dedic |
| 2025-07-23 | $4,850 | Remove existing NG Tanked Water Heater in utility closet. Install new Tankless Water Heate |
| 2025-07-23 | $3,350 | Remove existing Tankless Water Heater located in crawlspace. Install new Tankless Water He |
| 2025-07-09 | $4,800 | Remove existing 75 Gallon Tanked Gas Water Heater in garage. Install new Tankless Gas Wate |
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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 Mill Valley comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Mill Valley's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Mill Valley homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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