Not the city name. The utility territory, the permit process, and which rebates are genuinely funded this week. A page that swaps a city name into generic advice is worth nothing, so here is the local detail that moves a recommendation.
Local data last verified 7 Aug 2026
Incentives are live data, not evergreen content. An outlined Verify badge means we have not confirmed it ourselves, and we would rather show you that than present a guess as a fact.
Status: unverified by service zone. This matters because hard water drives tankless descaling frequency.
We will not publish an average. The evidence does not support that precision, and an average answers the wrong question anyway. Here is the job broken into parts instead.
| Item | Range |
|---|---|
| Water heater unitEntry level 40 gallon up to a premium contractor line | $950–$2,200 |
| Installation labour | $650–$1,300 |
| Permit and inspection | $150–$400 |
| Code compliance itemsExpansion tank, seismic strapping, relief discharge, drain pan | $150–$500 |
| Haul away of the old unit | $50–$150 |
| Venting correctionsIf the existing flue does not meet current code | $300–$900 |
| Re-piping or relocationIf the new unit does not match the old footprint | $200–$800 |
| Typical straightforward jobRequired items only | $1,950–$4,550 |
| If every upgrade appliesUncommon, but this is the ceiling | up to $6,250 |
Most of the spread sits in the first line. A basic 40 gallon unit and a premium contractor-channel model are the same job to install and roughly $1,200 apart to buy. For reference, one Modesto company currently quotes around $2,700 for a Bradford White installation, and a local water heater specialist advertises $1,995 to $2,495 for a standard 40 gallon replacement.
| Item | Range |
|---|---|
| Tankless unit | $1,300–$2,800 |
| Installation labour | $1,200–$2,400 |
| Permit and inspection | $150–$400 |
| Gas line upsizingIf the existing line cannot carry the unit | $350–$2,000 |
| New ventingAlmost always required on a conversion | $400–$1,500 |
| Dedicated electrical circuitCondensing units need power | $250–$900 |
| Condensate routingDepends on where the unit sits | $150–$600 |
| Recirculation pumpOnly if you want instant hot water at distant taps | $400–$1,600 |
| Typical straightforward jobRequired items only | $2,650–$5,600 |
| If every upgrade appliesUncommon, but this is the ceiling | up to $12,200 |
A conversion is a different job from a swap, and the conditional lines are where two houses on the same street end up thousands apart. National sources put tankless installation lower than this, but those figures largely describe replacing an existing tankless unit rather than converting from a tank.
A water heater replacement needs a permit. This is not a formality that conscientious contractors invent. It is how the inspection catches seismic strapping, the temperature and pressure relief line, venting and combustion air, all of which are safety items.
Modesto runs this online, which makes it unusually easy to verify. If a contractor tells you a permit is unnecessary for a like for like swap, treat that as information about the contractor.
Expanding beyond Modesto? We localise by utility territory rather than by city, which is why Turlock gets its own research rather than a find and replace.