Furnace Installation Cost in Mill Valley, CA
Based on 779 furnace installation building permits filed in Mill Valley between 2015 and 2026, the typical declared project value is $7,000, with most landing between $4,500 and $10,000. 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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Furnace Installation values over time in Mill Valley
Median declared value moved from $6,460 in 2021 to $7,662 in 2026, up 19% over that span. Each year below is computed from the filings that actually cleared in Mill Valley.
Recent furnace 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 |
|---|---|---|
| 2026-01-28 | $6,825 | Replace existing gas furnace, like for like, same location. |
| 2026-01-23 | $16,000 | Remove & replace furnace like for like |
| 2026-01-22 | $7,125 | FURNACE REPLACEMENT ONLY |
| 2026-01-21 | $6,938 | REPLACE FURNACE IN SAME LOCATION |
| 2026-01-15 | $10,625 | Replace furnace |
| 2026-01-12 | $4,958 | REPLACE FURNACE IN SAME LOCATION |
| 2026-01-12 | $4,539 | REPLACE FURNACE IN SAME LOCATION |
| 2026-01-07 | $10,000 | Remove & replace furnace like for like. |
| 2026-01-06 | $8,200 | Install Customer supplied Enphase batteries, Enphase IQ Combiner box 6C, and Enphase mete |
| 2026-01-05 | $9,000 | Remove & replace furnace in crawlspace like for like. |
| 2025-12-24 | $12,000 | Remove & replace furnace like for like. |
| 2025-12-23 | $5,200 | Replace gas wall furnace located in the hallway like for like in the same location. |
| 2025-12-23 | $3,500 | Replace failed 80% furnace with new, like for like, same location. |
| 2025-12-18 | $9,450 | Replace furnace in same location, a like in kind. |
| 2025-12-16 | $6,000 | REPLACING FURNACE IN ATTIC 4TON 80K |
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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 furnace 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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