Town of Southampton
Water Heaters in Water Mill, NY
A water heater in Water Mill costs $800–2,500 installed for a tank, about $2,638 for a tankless and $1,200–3,500 for a heat-pump model, which PSEG Long Island rebates up to $1,200 in 2026; the fuel at the street decides which. Tell us about the house in Water Mill; one licensed, insured plumber who installs heaters in Town of Southampton calls within one business day.
Last updated · Reviewed by Wainscott Plumbing Co.
A water heater in Water Mill is sized for a house that is empty in February and full in August, on whatever fuel reaches the street. We put Water Mill homeowners in touch with one licensed, insured plumber who installs tank, tankless and heat-pump heaters in Town of Southampton, and we publish the 2026 prices and the rebate.
Water heaters in Water Mill: what's different here
Estates on Mecox Bay and the ocean lanes in the most expensive ZIP code on the South Fork, more than 60% of them counted seasonal, on outwash ground with the water table a few feet down, and the two working mills the hamlet is named for.
Water Mill has gas on some streets and propane and oil on the rest, and the heater that makes sense follows the fuel; the plumber we send you to asks what is at the meter before quoting.
Water Mill is a hamlet of the Town of Southampton, permitted through the Building & Zoning Division in Hampton Bays, which publishes no plumbing page or fee line; the Town keeps mechanical equipment 10 feet from the property lines (8 feet in R-10) with screening. The hamlet had 2,506 residents at the 2020 Census and a median home price of $5,885,000 in 2024, the third most expensive ZIP code in the country, with more than 60% of its houses counted seasonal by the Town’s housing plan; the plumbing is estate plumbing, and the houses are empty at the design temperature.
Permits in Water Mill run through the Town of Southampton Building & Zoning Division in Hampton Bays; the plumber we put you in touch with handles the filing where one is required.
How it works
Tell us about the job once. One licensed, insured plumber who works Water Mill and handles water heaters regularly contacts you within 1 business day. Free for homeowners, no spam calls.
FAQ
Water heaters questions
Tank or tankless: which water heater for a Hamptons house?
A tank if the budget and the basement are ordinary: $800–2,500 installed for 40–50 gallons, labor $150–450 for a swap, 6–15 years of life by one guide and 8–12 by another. A tankless if the house fills up on Fridays and empties on Mondays: $2,638 average installed ($1,404–3,901), labor $600–1,900 because the venting and gas change, about 20 years of life, and no tank to fail in an empty house. A heat-pump water heater if the basement is big and warm: $1,200–3,500 installed and PSEG Long Island rebates up to $1,200 on an ENERGY STAR model in 2026, the only water-heater rebate left after the federal credit ended in 2025. On a propane or oil house, which is most of the fork, the fuel at the street decides more than the brochure does.
Do I need a permit to replace a water heater or boiler in East Hampton?
Ask the building department, because it does not say online. The Town of East Hampton’s Building Department publishes its permit requirements — two sets of quarter-inch plans, licensed-contractor documentation, notarized signatures, workers’ compensation, a survey — and a 13-question FAQ that never mentions plumbing, water heaters, boilers or gas piping; its fees rose in May 2024 and its desk ran 16–20 weeks behind in 2026. The Village of East Hampton issues in two to four weeks. The general pattern for like-for-like equipment swaps that touch no structure or service is a lighter permit, but no Town page states it, so we do not. The code applies either way: a temperature-and-pressure relief valve set no higher than 210°F and 150 psi, and an expansion tank on a closed system. The plumber we send you to files what the department asks.
How does Wainscott Plumbing Co. work?
You tell us about the house once: where it is, what is wrong or what you want done, and when. We put you in touch with one licensed, insured plumber who works your town and does that kind of work, and they call you within one business day, sooner for an emergency. From there it is their quote, their schedule, their warranty. It is free for homeowners; participating plumbers pay us a referral fee for the introduction. We are not a plumbing company, and we do not sell your details; the one company we send you to is the only one that gets your number. If the job is really a septic installer’s, a well driller’s or a heating contractor’s, we say so first. We cover 9 South Fork towns and 6 kinds of plumbing work.
Services
More in Water Mill
Emergency Plumbing & Burst Pipes in Water Mill
What a burst pipe costs to fix ($200–3,000, about $500 typical), what the emergency call adds, the first ten minutes before the plumber arrives, and why one home in sixty files a water-damage claim every year.
Boilers & Heating Plumbing in Water Mill
Boiler replacement at $3,600–8,400 (about $5,900) by type and fuel on a fork that burns oil and propane, radiant floors at $6–20 a square foot, the combi disagreement, lifespans, and why there is no boiler rebate.
Winterization & House Reopening in Water Mill
Drain it or heat it: the 55°F rule insurers apply, what a winterization includes, the $580 shutoff and the $25 alarm, the temperatures the pipes will see, and the spring reopening.
Well Pumps & Water Treatment in Water Mill
A well pump at $975–2,821, a pressure tank at $800–3,800, the iron and manganese in South Fork well water, what SCWA charges and is doing about lead and PFAS, and the softener price nobody publishes.
Remodel Plumbing & Gas Lines in Water Mill
Repiping at $8,000–13,500, fixtures from $150 to $5,500 installed, drains and sewers, a gas line at $15–30 a foot for the range, grill and pool heater, the permits, and the outdoor shower nobody prices.
Book a plumber in Water Mill
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