CostolioWater heater replacement cost in Marin County
In Marin County, the median declared value on 1063 water heater replacement permits issued to was $4,363, according to Building Permit permit data (checked ).
Water heater replacement cost in Marin County: permit figures
| Figure | Value |
|---|---|
| Median | $4,363 |
| 25th percentile | $2,900 |
| 75th percentile | $7,625 |
How this was counted
1063 permits · 2022-01-04 to 2026-10-08 · Source: Building Permit · Filter: https://data.marincounty.gov/resource/mkbn-caye.json?$where=issued_date >= '2022-01-01' (paged by :id) ; rule: keyword /WATER HEATER|TANKLESS/ AND NOT /SOLAR WATER|POOL HEATER|NEW (SFD|S\.?F\.?D|SINGLE[- ]FAMILY|DWELLING|HOUSE|HOME|BUILDING|\d+[- ]STORY|DUPLEX|CONDO|APARTMENT)/ ; residential only ; cost>0 · Pulled: 2026-11-02T14:19:22-08:00 · Checked on: 2026-11-02 · Contains data from Marin County (all jurisdictions in dataset), made available under the Open Data Commons ODbL
What a water heater replacement permit usually covers
Swapping an old tank or tankless water heater for a new one, including the permit the city requires. Removing the old heater and setting a new tank or tankless unit, with the venting, gas or electric hookup and earthquake straps the permit inspects. Moving the heater to a new spot, new gas lines, drywall repair and haul away are often priced separately or not listed on the permit.
Water heater replacement in Marin County compared with other places
Among the 2 places where we have water heater replacement figures, Marin County has the median at position 2 from lowest. Lower medians: Elk Grove. Marin County has the highest median of these.
Other Marin County projects with figures: Electrical panel upgrade, Pool installation, Seismic retrofit (foundation).
Read this first. Permit values are self-reported by the applicant to set permit fees. They often leave out materials or labor, and they are not what the contractor actually charged. A quote above or below this range can be reasonable.
About this Marin County sample
- 1063 permits after dropping $0 or blank values (0% of keyword matches had no cost)
- cost field
construction_valuein Building Permit - permits issued 2022-01-04 to 2026-10-08
Water heater replacement permits in Marin County by year
289 of these permits were issued in 2025, the busiest year in this sample. Counting only full years, the number of permits went down in 2023, then about the same in 2024, then up in 2025. The median declared value went up in 2023, then about the same in 2024, then down in 2025. 2022 and 2026 are partial years here, so their counts are lower.
| Year issued | Permits | Median |
|---|---|---|
| 2022 | 276 | $3,888 |
| 2023 | 237 | $4,762 |
| 2024 | 241 | $4,652 |
| 2025 | 289 | $4,064 |
| 2026 | 20 | fewer than 30 permits |
By month issued, the busiest months were January, March, February, and the quietest were September, December, July.
What the Marin County water heater replacement permits describe
We read the description each applicant wrote, leave out the standard wording the city adds to every permit, and sort the permit by the words it uses. The permit type the city chose is not used here. Where the description does not say, we count it as not stated. The most common kind here is tank type.
- Tank type: 492 permits (46%), median $3,798
- Tankless: 275 permits (26%), median $6,466
- Heat pump water heater: 118 permits (11%), median $8,825
- Not stated in the description: 178 permits (17%), median $3,480
Type of water heater named in Marin County water heater replacement permits
Read from the description only. 30% of these Marin County permits are described with gas.
- Gas: 322 (30%)
- Electric: 38 (4%)
- Not stated in the description: 703 (66%)
Other work listed on the same Marin County permits
Out of 1,063 Marin County water heater replacement permits with a description of their own, 85 (8.0%) also mention mechanical or HVAC; 44 (4.1%) also mention electrical work; 22 (2.1%) also mention windows or doors.
How we matched water heater replacement permits in Marin County
Marin County has no permit type for this work, so we count a permit when its description mentions water heater or tankless. We leave out permits whose description mentions solar water heating, pool heaters or new homes and buildings. We keep only permits for homes, not commercial buildings, and only permits with a declared value above $0.
Counted from the same 1063 permits as the figures above (2022-01-04 to 2026-10-08). Source: Building Permit.
Contains data from Marin County (all jurisdictions in dataset) (source), made available under the Open Data Commons ODbL. Figures derived from it are shared under the same license (share-alike).
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