Half of East Patchogue heats with oil. 50.8% of occupied homes burn fuel oil, against 29.4% on utility gas, 13.7% on electricity and 3.1% on bottled gas. The houses are of an age to match: the median home dates from 1970, 73.6% of the hamlet’s 8,652 homes were built before 1980, and the single largest decade is the 1970s, with 23.3% of the stock.
71.3% of homes are detached houses, and the rest is varied: 5.2% in two-unit buildings, 3.6% in buildings of three or four units, 5.8% in buildings of ten to nineteen and 6.3% in buildings of fifty or more. 74.9% of occupied homes are owner-occupied. East Patchogue is a hamlet in the Town of Brookhaven on the South Shore, running east from Patchogue village toward the village of Bellport and south to Patchogue Bay at the mouth of the Swan River.
The oil share shapes the job in two ways. The saving comes back as fewer deliveries, worth more or less each winter as the price of oil moves, so we talk about where a house loses heat rather than promising a payback date. And many owners are weighing a new boiler, a switch to gas where the street has a main, or a heat pump. Sealing and insulating first means whichever comes next can be sized smaller.
The houses we insulate in East Patchogue
The name covers more than one place. Route 27A is East Main Street in the western part of the hamlet and Montauk Highway in the eastern part, and the western side sends its children to Patchogue-Medford schools while the eastern side goes to Bellport High School. Around County Road 80 the area was once the hamlet of Hagerman; the station is gone and the name has faded, though the Hagerman fire district keeps it. The Smith-Rourke House and the Swan River Schoolhouse are on the National Register of Historic Places.
1,243 homes predate 1940 and 333 date from the 1940s. In those we assume balloon framing, with wall cavities open from the cellar to the attic, and knob-and-tube wiring until we have looked; the old wiring comes out before anything is blown into a wall. Where an old house has been added onto, a porch that became a room usually has no insulation in its floor or its low roof.
The 1950s left 1,489 homes, mostly capes and small ranches. The cape’s trouble is upstairs: knee walls with no air barrier behind them and floor bays running open to the eave. The ranch’s is overhead: a low attic of loose-fill that has settled for seventy years, with the oil chimney, the plumbing vent and every ceiling fixture open through it.
The 1960s added 1,288 homes and the 1970s 2,016, and those two decades, 38.2% of the hamlet, are the raised ranches, splits and ranches we come back to below. The 1980s added 1,048 and the 1990s 716, mostly colonials and raised ranches built under New York’s early energy codes: batts in the walls and a modest attic, leaking at the rim, the recessed lights and the ceiling over the garage.
The oil boiler adds its own items. The masonry chimney rises through the attic with an open gap around it, which gets closed with sheet metal and fire-rated sealant, never insulation. And after the house is tightened we check that the burner still drafts properly up that chimney. In the 13.7% of homes on electric heat, much of it baseboard, the same sealing shows up on the PSEG Long Island bill instead.
The two-, three- and four-unit buildings we scope as one building, because the attic, the stair and the cellar are shared. Buildings of ten units or more are envelopes their owners manage, not work for one apartment.
The 1970s house: the last decade built before New York had an energy code
2,016 East Patchogue homes were built in the 1970s, more than in any other decade. New York’s first statewide energy code took effect on 1 January 1979, so nearly all of them went up with no state standard for insulation or air leakage. They are not uninsulated. That is the trap: owners see batts in the walls and a few inches in the attic and assume the job was done.
What a 1970s raised ranch usually holds is paper-faced batts in two-by-four walls, fitted loosely around outlets and pipes and now around fifty years old; three to six inches of loose-fill or batts in an attic that were never sealed underneath; aluminum or early double-pane windows; and a lower level half below grade, with bare block walls and a rim joist at eye level in the family room. The upper floor often projects over the entry and the garage, and the underside of that overhang is a thin soffit board with open joist bays behind it.
Oil heat in these houses is often hot water to baseboard, and the heating pipes often run through the garage ceiling or the rim on their way to the rooms. That changes how the garage ceiling is insulated: the pipes have to stay on the warm side of the insulation, or the job that saves oil can also freeze a pipe in February.
So the scope in a 1970s East Patchogue house is rarely the walls. It is the attic, sealed and then brought up to depth; the rim and the block walls of the lower level; the overhang; and the garage ceiling, with the heating pipes accounted for.
We seal before we insulate
Insulation slows heat conducting through a ceiling or a wall. It does nothing about air moving through a gap, and a house with an open stair between two levels pulls cold air in at the bottom and pushes warm air out at the top all winter.
In a 1970s raised ranch the order is: seal the top plates, the chimney gap, the plumbing and flue penetrations, the fixture boxes and the attic hatch; seal the rim joist around the lower level and the joint between the block wall and the sill; block the joist bays at the overhang; seal the garage ceiling, including every pipe and wire hole. Then insulate the attic floor, the rim, the lower-level walls, the overhang and the garage ceiling. Then check the burner’s draft.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in East Patchogue
Most of our projects run between $3,500 and $12,500. In a raised ranch the number moves with the lower-level block walls and rim, the overhang and the garage ceiling, especially where heating pipes run through it. A 1950s ranch with one attic sits toward the lower end. A pre-1940 house with balloon-framed walls to block and fill, or a two- to four-unit building priced as one, sits higher. 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 East Patchogue
East Patchogue buys its electricity from PSEG Long Island. Its gas company is National Grid, whose gas is available on many streets but not all. Because the electric company is PSEG Long Island, NYSERDA’s Comfort Home program is not available to East Patchogue homes.
PSEG Long Island lists a $2,500 insulation rebate, a $1,000 air-sealing rebate and $500 for duct sealing for market-rate single-family homes, with higher amounts for income-qualified homes and homes in state-designated disadvantaged communities. Single-family homes heated with oil, natural gas, propane or electricity are all eligible. The rebates are paid through PSEG Long Island’s participating contractors after a free Whole House Energy Assessment, which includes a check of insulation and drafts, a thermal scan and a blower door test, and the insulation must go in with blower-door-assisted air sealing.
National Grid’s Long Island insulation rebate program is not taking new applications, and income-eligible households go through EmPower+, which is open to owners and renters of one- to four-family homes. NYSERDA’s EmPower+ program can pay for air sealing and insulation at no cost up to $14,000 for lower-income households (at or below $98,925 for a Suffolk family of four) or half the cost up to $7,000 for moderate-income households (below $131,900 for four), through an EmPower+ contractor. 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 for one- to four-family homes.
The federal insulation tax credit (Section 25C) ended for work placed in service after 31 December 2025, so there is no federal insulation credit on a 2026 job, and New York has no state tax credit for insulation. See our New York and New Jersey rebate guide for the rest.
Code and climate in East Patchogue
73.6% of East Patchogue’s homes were built before 1980. New York’s first statewide energy code took effect on 1 January 1979. Suffolk County is Climate Zone 4.
The 2025 Energy Conservation Construction Code of New York State has been in force since 31 December 2025. For a new house it requires R-49 ceilings, or R-38 across the entire ceiling where the uncompressed R-38 reaches full height over the wall top plate at the eaves; R-30 floors; basement and crawl space walls at R-15 continuous, R-19, or R-13 plus R-5 continuous; windows at U-0.27; and no more than 3.0 air changes per hour at 50 pascals.
An existing house is not held to that table. Unaltered parts do not have to comply, so insulating a raised ranch’s attic and lower level does not pull its walls or windows into the new-home standard, and New York’s code does not require a blower door test when you insulate an existing home. Where an alteration opens roof or wall cavities, the exposed cavities must be insulated to full depth. 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 East Patchogue
Do you install insulation in East Patchogue, NY?
Yes, on both the East Main Street and Montauk Highway sides of the hamlet. Most of our East Patchogue work is the 1960s and 70s raised ranch, split and ranch, 38.2% of the homes: attics sealed and brought to depth, lower-level rims and block walls, overhangs and garage ceilings. We also do the 1950s capes, the pre-1940 houses with balloon-framed walls, and two- to four-unit buildings scoped as one. Oil, gas and electric heat all get the same survey.
How much does insulation cost in East Patchogue?
Most projects run $3,500 to $12,500. A 1950s ranch with one attic sits toward the lower end. A raised ranch adds the lower-level rim and block walls, the overhang and a garage ceiling that may carry heating pipes. A pre-1940 house with walls to block and fill, or a small multi-unit building priced as one, sits higher. We give a written scope and price after a free walk-through, and we do not attach a payback date to an oil house.
Are there insulation rebates in East Patchogue?
Yes. East Patchogue is PSEG Long Island territory, 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 available to PSEG Long Island homes. Income-eligible households can apply to EmPower+. The federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state insulation tax credit.
We own a two-family house in East Patchogue. Do the insulation programs apply to it?
Some do, and one needs checking. PSEG Long Island’s 2026 rebate list is written for single-family homes, so ask PSEG Long Island directly before counting on it for a two-family. EmPower+ covers income-eligible owners and renters of one- to four-family homes, for a primary residence, so an owner who lives in one unit may qualify. NYSERDA’s Green Jobs–Green New York loans also cover one- to four-family properties. Whatever pays for it, we scope the building as one, because the attic, stair and cellar are shared.
Free energy audit in East Patchogue
In a raised ranch we start in the attic, then go down to the lower level for the rim and block walls, the overhang and the garage ceiling, following the heating pipes. In an older house we look for balloon framing and old wiring before we talk about walls. We note the chimney gap and the burner so the sealing plan accounts for them. If the attic is the whole job, we say so. Then a written scope and a price. No charge, no obligation.
Call 914-825-6824 or use our contact form. Open 8am–8pm, seven days. We work out of New Rochelle, NY with a 100-plus in-house crew that never subcontracts.
Learn more
- Insulation contractors across Suffolk County
- Insulation in Patchogue
- Insulation in Medford
- Insulation in Mastic
- Basement insulation
- Insulating a garage ceiling
- Air sealing