2,595 of the 9,036 housing units in Hampton Bays stood vacant when they were counted. In a hamlet of the Hamptons that usually means second homes: houses closed after the summer and opened again in spring, not houses sitting on the market. The other 6,441 are lived in, 78.2% of them by their owners, and 64.6% of those occupied homes heat with fuel oil. Utility gas heats 14.4%, electricity 10.9% and bottled gas 9.3%.
Almost everything here is a house: 88.8% of the stock is detached, and the median one dates from 1975. 40.9% went up in the 1960s and 70s and 27.6% in the 1980s and 90s, on a stretch of the Town of Southampton with Peconic Bay to the north and Shinnecock and Tiana bays to the south. So a Hampton Bays job is shaped by two things at once: oil burned all winter in the houses people live in, and houses that sit closed while the heat runs low to keep the pipes from freezing.
The houses we insulate in Hampton Bays
The hamlet was settled in 1740 as Good Ground, the main one of eleven small hamlets; Canoe Place, Ponquogue, Rampasture, Squiretown and Red Creek were among the others, and their names survive on street signs. They merged under the name Hampton Bays in 1922 to share in the Hamptons trade. 646 of today’s homes, 7.1% of the stock, were built before 1940, and the oldest went up while the place was still Good Ground. In those we assume balloon framing, empty walls and possibly knob-and-tube wiring until we see otherwise, and the wiring is settled first, because live knob-and-tube cannot be buried in insulation.
The 1960s built 1,906 of the homes standing now, more than any other decade, and the 1970s another 1,790. These are mostly one-story ranches and capes. A ranch loses its heat across a long, low attic: loose-fill that has settled and blown back from the eaves, top plates left open to the wall cavities below, a bath fan exhausting into the attic instead of outdoors, and a pull-down stair with nothing on its back. A cape loses it at the knee walls, where the insulation faces the bedroom, the back side is open to a crawl attic, and the floor joists run out to the eave with outdoor air moving between them.
The 1980s added 14.1% of the stock and the 1990s 13.4%, and many of those houses are contemporaries with cathedral ceilings and skylights. A cathedral ceiling from those years is usually rafters packed with batts, no vent channel above them and recessed lights cut through the slope, so it runs cold in winter and radiates heat in August. The fix is closed cell foam or dense-pack from inside when the ceiling is opened, or from above when the roof is replaced. In the 11.8% built since 2000 the walls are full; the losses are attic ducts and the rim joist.
Water is on three sides of the hamlet, and Shinnecock Inlet itself was cut through the barrier beach by the 1938 New England hurricane. On a low lot that has taken water, we keep insulation out of any space that floods and insulate the floor above it instead.
The oil figure counts only the houses someone lives in, and in an oil house every gap in the attic and every open rim joist is paid for in gallons. The house that burns the most oil and leaks the most gets its money back fastest. A second home kept on low heat burns less and saves less, but it has other reasons to be sealed.
Second homes: the house that stands closed from fall to spring
A closed house is not a cold house. The heat is left on low so the plumbing survives January, and the boiler runs all winter for nobody. The first pipes to freeze are in the crawl space, along the rim joist and in outside walls, exactly where an unsealed house lets the wind in. Seal the sill and the rim, close the crawl space to the outdoors, lay a vapor retarder on the ground and insulate the crawl space walls, and those pipes sit inside the house. The low setting then burns less oil, and the house is less likely to open in spring with water on the floor.
The season the owners are actually there is summer, and a thin attic over the bedrooms makes that the uncomfortable one. Where the air conditioning ducts run through a vented attic, the cooled air is leaking into the hottest space on the property. We seal and insulate those ducts, or bring the attic inside the house with open cell foam under the roof deck so the ducts sit in conditioned space.
A second home sometimes becomes the full-time house. A ranch that was comfortable in July is a different house in February, and if that change is coming, the walls and the floor belong in the plan now.
We seal before we insulate
Insulation slows the heat that moves through a ceiling or a floor. It does not stop the air that moves through a gap, and in a house on oil that air carries heat the burner has already paid for.
In a Hampton Bays ranch over a crawl space, the order is: in the attic, seal the top plates, the plumbing vents, the electrical penetrations and the recessed lights; close the gap around the oil flue with sheet metal and high-temperature sealant, never foam; duct the bath fan outdoors; weatherstrip the pull-down stair; baffle the eaves. Then blow the attic to depth. Underneath, seal the sill and rim joist, close the crawl space vents, cover the ground and insulate the crawl space walls.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in Hampton Bays
Most of our projects run between $3,500 and $12,500. A 1960s ranch with an open attic and a basement sits toward the lower end. The number climbs with a crawl space that has to be closed and insulated, with ductwork in the attic, and most of all with cathedral ceilings, which take closed cell foam or dense-pack in slopes that are hard to reach. For the foam side of the number, see what spray foam costs.
Open cell foam runs R-3.9 to R-4.2 per inch. Closed cell runs R-6.9 to R-7.1 per inch and also acts as a vapor retarder, which is why it costs more and why it is right in some assemblies and unnecessary in others. All products are manufactured in the United States and meet applicable building code and safety standards. ENERGY STAR says sealing air leaks and adding insulation can save up to 10% on annual energy bills.
Insulation rebates in Hampton Bays
Hampton Bays gets its electricity from PSEG Long Island. Its gas company is National Grid, but gas lines reach only parts of Hampton Bays; many homes heat with oil, propane or electricity. NYSERDA’s Comfort Home program cannot be used by PSEG Long Island customers, so it plays no part here.
The utility money comes from PSEG Long Island, which lists a $2,500 insulation rebate, a $1,000 air-sealing rebate and a $500 duct-sealing rebate for market-rate single-family homes, with higher amounts for income-qualified homes and homes in state-designated disadvantaged communities. The rebates are paid through PSEG Long Island’s participating contractors, after a free Whole House Energy Assessment that checks insulation and drafts with a thermal scan and a blower door test. Homes heated with oil, propane, natural gas or electricity all qualify. The insulation has to go in with comprehensive, blower-door-assisted air sealing, and ductwork in unconditioned space, such as an attic air conditioning run, must be duct sealed. If the house is a second home, confirm eligibility with PSEG Long Island before the work is scoped.
EmPower+ is for the year-round household. NYSERDA funds air sealing and insulation for income-eligible owners and renters through an EmPower+ contractor, but only in a primary residence: at no cost up to $14,000 for lower-income Suffolk households (at or below $98,925 for four people), or half the cost up to $7,000 for moderate-income households (below $131,900 for four). Federal HEAR money inside EmPower+ can add up to $1,600 for air sealing, insulation and ventilation. National Grid’s own Long Island insulation rebate program is not taking new applications. Long Island households should check eligibility on the MyEnergy portal.
NYSERDA’s Green Jobs–Green New York program also offers unsecured loans of $1,500 to $25,000 over 5, 10 or 15 years; PSEG Long Island customers apply for the on-bill version through PSEG Long Island. A loan is paid back.
Each program pays only through its own participating contractors, so ask any installer whether they are on that program’s list. The federal insulation tax credit (Section 25C) ended for work placed in service after 31 December 2025, so a 2026 job carries no federal credit, and New York has no state tax credit for insulation. The details are in our New York and New Jersey rebate guide.
Code and climate in Hampton Bays
60.7% of Hampton Bays’ homes were built before 1980. New York’s first statewide energy code took effect on 1 January 1979, after the 1960s ranches and nearly all the 1970s capes were finished. Suffolk County is Climate Zone 4.
Since 31 December 2025 new homes have been built under the 2025 Energy Conservation Construction Code of New York State. It calls for R-49 in the ceiling, or R-38 over the entire ceiling where the uncompressed R-38 keeps its full height over the wall top plate at the eaves. Floors get R-30. Basement and crawl space walls get R-15 continuous, R-19, or R-13 plus R-5 continuous. Windows must reach U-0.27, and the finished house may leak no more than 3.0 air changes per hour at 50 pascals.
A house already standing is not pulled up to that table. Unaltered parts of an existing home need not comply, and New York’s code does not require a blower door test when you insulate an existing home. When an alteration exposes roof or wall cavities, those cavities must be insulated to full depth, so a contemporary’s cathedral ceiling opened for a skylight or a new roof gets filled before it is closed. ENERGY STAR recommends R-60 for an uninsulated attic in this zone and R-49 where 3 to 4 inches are already down.
Common questions about insulation in Hampton Bays
Do you install insulation in Hampton Bays, NY?
Yes. Most of our Hampton Bays work is the 1960s and 70s ranch or cape: the attic, the knee walls, the rim joist and the crawl space. We also insulate the cathedral ceilings of the 1980s and 90s contemporaries, the pre-1940 houses from the Good Ground years, and second homes that sit closed through the winter, from the Peconic Bay side of the hamlet down to the streets along Shinnecock and Tiana bays. Tell us on the phone whether the house is lived in all year.
How much does insulation cost in Hampton Bays?
Most projects run $3,500 to $12,500. A ranch with an open attic and a basement is usually toward the lower end. Closing and insulating a crawl space, sealing ducts in the attic, and above all filling cathedral ceilings in a contemporary move the number up. A pre-1940 house with empty walls needs a wiring check before anything goes into them, and we price the walls once we have looked. You get a written scope and a price after a free walk-through.
Are there insulation rebates in Hampton Bays?
Yes. Hampton Bays is on PSEG Long Island’s electric grid, and PSEG Long Island lists a $2,500 insulation rebate and a $1,000 air-sealing rebate for market-rate single-family homes, more for income-qualified homes, paid through its participating contractors after a free Whole House Energy Assessment. Oil-heated homes qualify. Comfort Home is not open to PSEG Long Island customers. EmPower+ covers only a primary residence. The federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state insulation credit.
We only use our Hampton Bays house in summer. Is insulating it worth it?
Usually, but the job is different from a year-round house. In winter the heat stays on low to protect the plumbing, so sealing the rim joist and crawl space and bringing the pipes inside the envelope cuts oil and lowers the risk of a frozen line. In summer the attic over the bedrooms and any ducts running through it are the problem. EmPower+ funds only a primary residence, and PSEG Long Island’s eligibility for a second home should be confirmed with PSEG Long Island before you plan around a rebate.
Free energy audit in Hampton Bays
We start in the attic: the eaves, the top plates, the oil flue chase, the bath fans and any air conditioning ducts, or the cathedral slopes in a contemporary. Then the crawl space or basement, the rim joist, and where the water pipes run. If the attic is fine and the real loss is the crawl space, we say so. Then a written scope and a price, with no charge and no obligation.
Call 914-825-6824 or use our contact form. We are open 8am–8pm, seven days. We work out of New Rochelle, NY, a family-owned company since 2015 with a 100-plus in-house crew that never subcontracts.
Learn more
- Insulation contractors across Suffolk County
- Insulation in Riverhead
- Insulation in Manorville
- Crawl space insulation
- Spray foam for cathedral ceilings and attic ducts
- Air sealing