22.8% of Ridge’s 6,199 homes are attached single-family units, 1,412 townhouses and duplex halves, and 35.1% of occupied homes heat with electricity. Oil still heats 41.9% and utility gas 19.7%, and detached houses remain the largest group at 63.0%, but a large share of Ridge lives behind a party wall, paying for heat on the same PSEG Long Island bill as the lights.
The median home dates from 1979, 33.9% was built in the 1970s and 25.8% in the 1980s, and only 3.0% predates 1940. 89.3% of occupied homes are owner-occupied. So the work here splits two ways: the attic, rim and garage of a 1970s or 80s detached house in the Town of Brookhaven, and the party wall, end wall and small attic of an attached home where every leak turns up on the electric bill.
The houses we insulate in Ridge
For most of its history Ridge was farm and forest. Samuel Randall settled the north of it in 1738, and his descendants farmed 4,000 acres he called “the Ridge” for the lay of the land, which is how a place first called Randallville got its name. The south side was the northern end of William “Tangier” Smith’s Manor St. George, known as Longswamp and later Longwood. Elbert Clayton Smith took over Longwood’s 750 acres in 1955, and after his death in 1967 the estate was carved into housing developments until the house and 35 acres went to the Town of Brookhaven in 1974. The building numbers follow that story: 2,100 of today’s homes went up in the 1970s and 1,601 in the 1980s.
The 1970s detached house here is a ranch, a raised ranch or a split. Its attic is long and low, the loose-fill in it has settled and pulled back from the eaves, and the top plates, the plumbing stack and the bath fan housing are open to the house below. A raised ranch adds a lower level half in the ground, with a garage under a bedroom and a rim joist sitting on an exposed foundation wall. Those three, the attic, the rim and the garage ceiling, are where it loses heat.
The 1980s colonials and contemporaries were built with insulated walls, usually R-11 to R-13, and an attic of R-19 to R-30. Blowing more into those walls rarely pays. What leaks is overhead and underneath: recessed lights, a whole-house fan or pull-down stair, ductwork for central air running through a vented attic, the wall between the garage and the house, and a rim joist nobody sealed. A cathedral ceiling from those years usually has batts with no vent channel above them.
The 617 homes from the 1950s and the 185 built before 1940 predate the developments: small capes and ranches with shallow attics, and older frame houses where we check for balloon framing and knob-and-tube wiring before anything goes into a wall. On wooded lots at the edge of the Pine Barrens, which Ridge’s own sign calls its gateway, we also check that soffit vents are not packed with needles and debris before we add insulation that depends on them.
Oil, at 41.9%, is still the largest fuel. In an oil-heated house the payback on sealing and insulating comes in gallons, and it arrives fastest in the leakiest house that burns the most.
Townhouses on electric heat: the end unit, the party wall and the bill
Attached homes usually sit in developments run by an association, so the first question is what you own. The roof, the siding and often the attic may belong to the association; the inside of your unit belongs to you. Read the declaration or ask the manager before anyone scopes the attic.
What sets Ridge apart is the heat. 35.1% of occupied homes heat with electricity, and much of that is likely in attached homes built with electric baseboard or heat pumps. An electric-heated house shows its air leaks on one bill. The biggest leaks are rarely the walls. They are the gap where the party wall meets the roof deck, so each unit’s attic air mixes with the next; the attic hatch; the recessed lights and bath fans in the top-floor ceiling; the rim joist or slab edge at the ground floor; and the framing around sliding doors, which is often left hollow.
An end unit carries one more outside wall than the units beside it, and often more windows and the gable end of the attic. It will always cost more to heat than a middle unit, but sealing its end wall at the top plate and the rim, and insulating its share of the attic, narrows the gap. A middle unit gains the most from sealing the party walls, because heat leaving through a gap there feeds the attic, not the neighbor.
We seal before we insulate
Insulation slows heat through a surface. It does nothing about air moving through a gap, and in an electric-heated townhouse that air is the part of the bill you can do the most about.
In a Ridge townhouse the sequence runs top to bottom: close the gap between the party wall and the roof deck where the association allows it; seal the top plates, the fan housings, the recessed lights and the wiring holes in the top-floor ceiling; weatherstrip and insulate the hatch; then bring the attic insulation to depth. At the ground floor, seal the sill and rim or the slab edge, and the hollow framing at the sliding door. In a 1970s detached house the attic comes first, then the rim joist, then the garage ceiling under the bedroom.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in Ridge
Most of our projects run between $3,500 and $12,500. A middle townhouse with a small attic and one rim is usually near the bottom of that range; an end unit adds its outside wall and gable. A 1970s raised ranch sits in the middle with its long attic, rim joist and garage ceiling. A 1980s colonial climbs when the attic holds ductwork that has to be sealed and insulated, or a cathedral ceiling that needs closed cell foam or dense-pack.
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 Ridge
Ridge’s electric company is PSEG Long Island. National Grid supplies gas, available on many streets but not all. With PSEG Long Island as the electric company, NYSERDA’s Comfort Home program is not an option for Ridge homes.
PSEG Long Island 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. Payment goes through its participating contractors, and the first step is a free Whole House Energy Assessment with a check of insulation and drafts, a thermal scan and a blower door test. Electric heat qualifies, as do oil, natural gas and propane. The insulation must be installed with blower-door-assisted air sealing. PSEG Long Island writes these rules for single-family homes, so a townhouse owner should confirm eligibility, and the association’s permission for any attic work, before planning around the money.
EmPower+, run by NYSERDA, pays for air sealing and insulation for income-eligible owners and renters through an EmPower+ contractor. Lower-income Suffolk households, at or below $79,163 for two people or $98,925 for four, can have the work done at no cost up to $14,000; moderate-income households, below $105,550 for two or $131,900 for four, get half the cost covered up to $7,000. HEAR funds can add up to $1,600 for air sealing, insulation and ventilation. National Grid’s own Long Island insulation rebate program is not accepting new applications. Long Island households should check eligibility on the MyEnergy portal.
PSEG Long Island’s REAP visit is a free in-home energy survey for customers at or below its income guideline ($131,900 for a household of four) who have not had one in five years. It can leave a smart thermostat, door sweeps and an attic hatch cover, but it does not install insulation.
Programs pay only through their own participating contractors, so ask the installer whether they are on the list. The federal insulation tax credit (Section 25C) ended for work placed in service after 31 December 2025; there is no federal 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 full picture.
Code and climate in Ridge
54.9% of Ridge’s homes were built before 1980. New York’s first statewide energy code took effect on 1 January 1979. The median Ridge home dates from 1979 as well, but a code on paper and what a builder put in the attic are two different things, so we judge a house by what we find, not by its year. Suffolk County is Climate Zone 4.
New construction now follows the 2025 Energy Conservation Construction Code of New York State, in force since 31 December 2025: R-49 ceilings, or R-38 across the whole ceiling where it reaches full uncompressed 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; U-0.27 windows; and no more than 3.0 air changes per hour at 50 pascals.
Existing homes are treated differently. Unaltered portions do not have to comply, and New York’s code does not require a blower door test when you insulate an existing home. When an alteration exposes wall or roof cavities, they must be insulated to full depth, so a townhouse bathroom opened to the studs on an end wall gets that wall filled. ENERGY STAR recommends R-60 for an uninsulated attic in this zone and R-49 where 3 to 4 inches are already there.
Common questions about insulation in Ridge
Do you install insulation in Ridge, NY?
Yes. In Ridge we insulate the 1970s ranches, raised ranches and splits built as the Longwood lands were developed, the 1980s colonials and contemporaries with ducts in the attic, and the older capes and farmhouses from before the building boom. We also work on attached homes, 22.8% of the hamlet, where the job is the party wall, the end wall and the attic, once the owner has confirmed with the association what they are allowed to change.
How much does insulation cost in Ridge?
Most projects run $3,500 to $12,500. A middle townhouse with a small attic is usually near the low end, and an end unit costs more because of its outside wall and gable. A 1970s raised ranch, with its long attic, rim joist and garage ceiling, is in the middle. A 1980s house with ductwork or a cathedral ceiling in the attic moves higher. We give a written scope and price after a free walk-through.
Are there insulation rebates in Ridge?
Yes. Ridge is PSEG Long Island territory. 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; electric-heated homes qualify, and townhouse owners should confirm eligibility. Comfort Home is not available to PSEG Long Island customers. EmPower+ helps income-eligible households. The federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state insulation credit.
Our Ridge townhouse is an end unit with electric heat, and it costs more to heat than our neighbor’s. Why?
An end unit has an extra outside wall, usually more windows, and the gable end of the attic, so it loses more heat than a middle unit even when both are built the same. With electric heat, that difference lands directly on the PSEG Long Island bill. The fix is to seal the end wall at its top plate and rim, seal the attic floor and the hatch, and bring your share of the attic to depth. Check with the association first about what you may change.
Free energy audit in Ridge
In a townhouse we look at the attic hatch and whatever attic we can reach, the party wall where it meets the roof, the top-floor ceiling, the end wall if you have one, the sliding door framing and the rim or slab edge. In a detached house we start in the attic, then go to the rim joist, the garage ceiling and any ducts. If the real loss is the hatch and the recessed lights, not the insulation depth, 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. 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 Coram
- Insulation in Manorville
- Insulation in Rocky Point
- Air sealing
- Attic insulation
- What happens during an energy audit