A quarter of the Village of Patchogue predates 1940. 24.9% of its 5,685 homes, 1,418 of them, were built before that year, the largest single age group in the village, and 71.4% of the stock went up before 1980. The median home dates from 1966, and the village has kept building: 10.6% of homes date from the 2010s.
It is also a village of apartments as much as houses. 49.7% of homes are detached houses, 4.9% attached and 8.2% in two-unit buildings, while 9.3% are in buildings of five to nine units, 6.7% in buildings of ten to nineteen, 7.4% in buildings of twenty to forty-nine and 9.3% in buildings of fifty or more. 56.0% of occupied homes are owner-occupied. Utility gas heats 53.1% of occupied homes, fuel oil 25.9%, electricity 17.0% and bottled gas 2.0%.
The Incorporated Village of Patchogue sits in the Town of Brookhaven on the shore of Patchogue Bay, part of the Great South Bay. It became a village in 1893. It is not the same place as East Patchogue, the separate hamlet that runs east from the village line, whose houses are younger and far more oil-heated; East Patchogue has its own page.
The houses we insulate in Patchogue
The 1,418 homes from before 1940 are the village’s signature: frame houses, typically with full attics, porches and cellars, in a village whose downtown the American Planning Association named one of America’s “Great Neighborhoods” in 2019. The Congregational Church on East Main Street, the United Methodist Church on South Ocean Avenue and St. Paul’s Episcopal Church on Rider Avenue are all on the National Register of Historic Places.
We assume those houses are balloon-framed until we see otherwise. In a balloon frame the wall studs run in one piece from the sill to the roof, so every exterior wall cavity is an open chute from the cellar to the attic, and every interior partition can be one too. Cold cellar air rises through them all winter. We also assume knob-and-tube wiring until we have looked, and old wiring comes out before anything is blown into a wall. The walk-up attic is usually floored, with a stair enclosed by thin walls and a door that seals nothing; the porch roof meets the house wall with an open joint; and the cellar rim sits on a foundation of brick, stone or block.
Some of those older houses now hold two or three households; 8.2% of homes are in two-unit buildings and 4.4% in buildings of three or four. We scope those as one building: the attic, the cellar, the stair and the plumbing chases run through every unit, and sealing one apartment’s part of them does not work.
The 1940s added 222 homes and the 1950s 843, mostly capes and small ranches with knee walls and settled attics. The 1960s added 632 and the 1970s 945: raised ranches, splits and garden apartment buildings. The 1980s and 90s added 310 and 286 homes, and the 2000s and 2010s 425 and 604.
Apartment buildings and village streets: where our Patchogue work is
With 9.3% of homes in buildings of fifty or more units and 7.4% in buildings of twenty to forty-nine, Patchogue has real apartment buildings, and we are straightforward about them. A building of twenty, fifty or a hundred apartments has an envelope that belongs to its owner, or to a board or association where there is one. Its roof, walls and mechanical systems are capital decisions for the building, often involving an engineer, and not something one tenant or one unit owner can order. If you live in one, the useful call is to the owner or the board.
A smaller building is different. A frame house divided into apartments, or a building of five to nine units owned by one landlord, has an attic, a cellar and a rim like any house, and an owner who can say yes. Those we can scope as a whole, and the work is much the same as in a single-family house of the same age, only with more units to schedule around.
The streets are the core of the work: the 2,825 detached houses, the 279 attached homes and the two-, three- and four-unit buildings. If you are not sure which side of the line your building falls on, ask on the phone before anyone drives out.
We seal before we insulate
Insulation slows heat moving through a surface. It does nothing about air moving through a gap, and a balloon-framed house is mostly gaps: every open stud bay is a flue from the cellar to the attic.
In a pre-1940 Patchogue house the sequence is: at the attic floor, block and seal the top of every open wall cavity, the chimney gap and the plumbing chases; weatherstrip the attic stair door and seal its enclosure; in the cellar, block the bottoms of the same cavities at the sill and seal the rim; close the joint where the porch roof meets the wall. Only then are the walls dense-packed and the attic insulated. In a divided house, that work covers every unit.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in Patchogue
Most of our projects run between $3,500 and $12,500. In a pre-1940 house the number moves with how many open wall cavities need blocking at top and bottom, whether the walls are dense-packed from outside or inside, the size of a walk-up attic, and old wiring that has to be replaced first. A divided house is priced as one building. A 1950s cape or ranch is usually a smaller scope. For the foam side of the price, 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 Patchogue
The Village of Patchogue is served by PSEG Long Island for electricity. National Grid gas is available on many village streets, and 53.1% of homes heat with it, but not every street has a main, so the bill settles it. With PSEG Long Island as the electric company, NYSERDA’s Comfort Home program is not available to village homes.
PSEG Long Island’s own program begins with a free Whole House Energy Assessment: a check of insulation and drafts, a thermal scan and a blower door test. It lists a $2,500 insulation rebate and a $1,000 air-sealing rebate for market-rate single-family homes, with higher amounts for income-qualified homes and homes in state-designated disadvantaged communities, and it requires insulation to go in with blower-door-assisted air sealing. The rebates are paid through PSEG Long Island’s participating contractors, so ask the installer whether they are one. PSEG Long Island’s 2026 list is written for single-family homes, so the owner of a two-family or a divided house should ask PSEG Long Island before counting on it.
National Grid’s Long Island insulation rebate program is not taking new applications, and income-eligible households now go through EmPower+, which covers one- to four-family homes and is open to renters as well as owners. 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 household 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 loans, $1,500 to $25,000 over 5, 10 or 15 years, also cover one- to four-family properties.
The federal insulation tax credit (Section 25C) ended for work placed in service after 31 December 2025, so a 2026 job has no federal credit, and New York has no state tax credit for insulation. Our New York and New Jersey rebate guide covers the rest.
Code and climate in Patchogue
71.4% of the village’s homes were built before 1980. New York’s first statewide energy code took effect on 1 January 1979, so Patchogue’s pre-1940 houses are four decades and more older than any state energy standard. Suffolk County is Climate Zone 4.
New buildings now follow the 2025 Energy Conservation Construction Code of New York State, in force since 31 December 2025. For houses it sets R-49 ceilings, or R-38 over the whole ceiling where the uncompressed R-38 keeps full height over the wall top plate at the eaves; R-30 floors; R-15 continuous, R-19, or R-13 plus R-5 continuous on basement and crawl space walls; U-0.27 windows; and a maximum of 3.0 air changes per hour at 50 pascals.
An old house is not required to meet that table. Unaltered portions need not comply, and New York’s code does not require a blower door test when you insulate an existing home. Where a renovation exposes wall or roof cavities, as when plaster comes down in a gut kitchen or a divided house is reworked, the exposed cavities must be insulated to full depth, and existing insulation may not be reduced. 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 Patchogue
Do you install insulation in Patchogue, NY?
Yes, in the Village of Patchogue and in East Patchogue next door, which has its own page. In the village most of our work is the pre-1940 frame houses, 24.9% of the stock: balloon-framed walls blocked and dense-packed, walk-up attics, porches and cellar rims, including houses divided into two or more apartments. We also insulate the 1950s capes and ranches and the 1970s raised ranches. Large apartment buildings are managed by their owners or boards, and we will say so when you call.
How much does insulation cost in Patchogue?
Most projects run $3,500 to $12,500. In a pre-1940 house the drivers are the number of open wall cavities to block, whether the walls are dense-packed from outside or inside, the walk-up attic and any old wiring that must be replaced first. A house divided into apartments is priced as one building. A 1950s cape or ranch is usually a smaller scope. We give a written scope and price after a free walk-through.
Are there insulation rebates in Patchogue?
Yes. The village buys electricity from PSEG Long Island, which 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. Comfort Home is not open to PSEG Long Island customers. EmPower+ covers income-eligible owners and renters of one- to four-family homes. The federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state tax credit for insulation.
We rent the upstairs of our Patchogue house to a tenant. Can the work be done while they live there?
Usually, yes. Attic work needs access through the hatch or stair, which is often inside the upstairs unit, so we schedule it with the tenant. Cellar and rim work happens from below. Walls dense-packed from outside barely disturb anyone inside. Spray foam is different: occupants stay out of the area during application and for the re-entry period the manufacturer specifies, so foam areas get planned around the tenant. If the household’s income qualifies, note that EmPower+ accepts renters as well as owners.
Free energy audit in Patchogue
We start in the attic, walk-up or hatch, and look down into the tops of the wall cavities to see whether the house is balloon-framed. Then the cellar: the sill, the rim, the bottoms of those same cavities and the wiring. We look at the porch roof joint, the chimney and the plumbing chases, and in a divided house we walk every unit. If the walls are already full and the job is the attic and cellar, we say so. Then a written scope and a price. No charge, no obligation.
Call 914-825-6824 or reach us through our contact page. 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 East Patchogue
- Insulation in Medford
- Insulation in Sayville
- Insulation for older homes
- Wall insulation
- Is spray foam safe?