None of the 3,683 housing units in the Village of New Hyde Park dates from 2010 or later, and 96.0% of them were built before 1980. The village is split between pre-war and post-war houses: 26.5% of units went up before 1940, then 18.3% in the 1940s and 37.0% in the 1950s, putting the median home at 1951.
The village covers 0.8 square miles and was incorporated in 1927; most of it is in the Town of North Hempstead and a part is in the Town of Hempstead. Its neighbors are Floral Park, Stewart Manor, Garden City Park and Garden City. The New Hyde Park 11040 postal area is much larger and takes in unincorporated North New Hyde Park, Garden City Park, Herricks, Manhasset Hills and Lakeville Estates; North New Hyde Park, the hamlet north of the village, has its own page and a housing mix of its own. The figures on housing and heat here describe only the village.
Detached houses account for 84.5% of village units, two-unit buildings for 10.1% and attached homes for 2.8%, and owners live in 86.1% of occupied homes. More than three-quarters of the village’s land is in single-family homes, with warehouses near the Long Island Rail Road station and shops along Jericho Turnpike. Heat is 83.5% utility gas, 11.9% fuel oil, 3.4% electricity and 0.8% bottled gas.
The houses we insulate in New Hyde Park
In 1683 Thomas Dongan, the fourth royal governor of New York, was granted an 800-acre parcel that included New Hyde Park, known as Dongan’s Farm, and built a mansion on what is now Lakeville Road. George Clarke bought the estate in 1715 and named it Hyde Park after his wife, Ann Hyde. Cattle were the main business from Dongan’s time to the mid-19th century, the land was parceled into farms, and when a post office opened in 1871 the name became New Hyde Park, to avoid confusion with Hyde Park in the Hudson Valley. By the end of the 1930s, 977 of today’s homes were standing.
A pre-war house in the village was framed with nothing in its walls, and the older ones are often balloon-framed, with bays that open into the attic above and the cellar below. The top floor is where these houses differ most. Some have a plain hatch attic; many have a full stair behind a door, rising to an attic later finished into a bedroom, with plaster or wallboard nailed straight to the rafters and short eave walls hiding unheated triangles. Old knob-and-tube circuits can still be live in these houses, so the wiring gets traced before any cavity is closed over.
The 675 homes from the 1940s and 1,364 from the 1950s are mostly capes and ranches. The cape’s second floor sits in the roof: two bedrooms under sloped ceilings with a few inches of rafter depth, knee walls facing crawl-sized attic spaces, and a small flat attic above a collar tie that is often the hottest place in the house. The ranch spreads its losses across one ceiling, where the leaks are the wall tops, the light boxes, the plumbing vent and a hatch or pull-down stair that was never weatherstripped.
Among the 432 homes from the 1960s are split-levels and raised ranches, whose bedrooms over the garage and walls beside the lower roof bring their own leaks. Building nearly stopped after that: 2.4% of units are from the 1970s and fewer still from any decade since.
The 372 units in two-unit buildings put one household directly under the roof and another over the cellar, and we scope them as one building. The village’s few small apartment buildings (1.0% of units sit in five- to nine-unit buildings, 1.2% in ten- to nineteen-unit ones) are managed whole by their owners. For the 83.5% of homes heated by gas, winter savings appear on National Grid statements; for the 11.9% on oil, as fewer fill-ups.
The top floor in July: attic rooms, cape bedrooms and upstairs apartments
In a New Hyde Park house the worst room is usually upstairs, and the worst season is summer. The pre-war attic bedroom, the 1950s cape’s second floor and the upper unit of a two-family have the same problem: a roof deck baking in the sun a few inches from the ceiling, with almost nothing in between.
On a July afternoon the shingles and deck get far hotter than the air, and that heat passes straight through a thin rafter bay. The unheated triangles behind the knee walls and the small attic over the collar ties turn into ovens and keep radiating into the bedrooms long after dark. Air leaks make it worse: warm attic air slips in around the knee-wall doors and light fixtures while the cooled air a window unit produces escapes the other way. A powered attic fan over a leaky ceiling can end up drawing that cooled air out of the rooms below.
The fix is the same one that makes those rooms warmer in January. Close the knee-wall triangles and the little attic overhead off from the bedrooms, stop up the floor bays running beneath the knee walls, and fill the slopes as deep as the rafters allow, keeping a vent channel above the insulation where the roof relies on soffit and ridge vents. Where the rafters are too shallow for enough fiber, closed cell foam gives the most resistance per inch; where the upper attic is open, it gets blown to depth. After that, a modest air conditioner holds the rooms, and lower summer use shows up in PSEG Long Island charges.
We seal before we insulate
Fill in a rafter bay slows the heat conducted through it. Gaps around a top floor let air carry heat past that fill, inward in August and outward in February, so the gaps are closed first.
On the top floor of a New Hyde Park cape or pre-war house the order is: put an air barrier on the attic face of each knee wall and weatherstrip the little doors through it; block the joist bays under them at the eave line; seal the plumbing vent, the chimney gap with sheet metal and high-temperature sealant, the light boxes and the hatch or attic stair; install vent baffles in the slopes. Only after that do the knee walls, slopes and upper attic get insulated; the cellar rim and sill close out the job.
If a quote specifies a depth of insulation and never mentions air sealing, it is half a job.
What insulation costs in New Hyde Park
Most of our projects run between $3,500 and $12,500. In the village the top floor sets the price: the running feet of knee wall and eave, whether a slope is open from above or has to be filled through the finished ceiling, and whether its rafters are too shallow for anything but closed cell foam. A finished pre-war attic room costs more than a hatch attic. A ranch is usually simpler: the ceiling plane, the eaves and the rim. A two-family is priced as one building.
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 New Hyde Park
The village’s electric company is PSEG Long Island, and most of New Hyde Park is on National Grid gas lines. The electric company settles which programs a house can use, and NYSERDA’s Comfort Home is not available to PSEG Long Island homes.
PSEG Long Island 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. They are paid through its participating contractors after a free Whole House Energy Assessment. Insulation must go in with blower-door-assisted air sealing, and ductwork in unconditioned space must be sealed. The list is written for single-family homes, so the owner of a two-family should check with PSEG Long Island before counting on it.
Income-eligible owners and renters of one- to four-family homes can apply to NYSERDA’s EmPower+, which can pay for air sealing and insulation at no cost up to $14,000 for lower-income households (at or below $69,263 for a Nassau household of one, $98,925 for four) or half the cost up to $7,000 for moderate-income households (below $92,350 for one, $131,900 for four), through an EmPower+ contractor. Long Island households should check eligibility on the MyEnergy portal. National Grid’s Long Island insulation rebate program is not taking new applications.
Every one of these programs pays through its own participating contractors, so check the program’s list before you sign. The federal insulation tax credit (Section 25C) ended for work placed in service after 31 December 2025, and New York has no state tax credit for insulation. Our New York and New Jersey rebate guide has the rest.
Code and climate in New Hyde Park
96.0% of the village was built before 1980. New York’s first statewide energy code took effect on 1 January 1979, more than half a century after the village incorporated. Nassau County is Climate Zone 4.
The 2025 Energy Conservation Construction Code of New York State has governed new construction since 31 December 2025. It requires R-49 ceilings, met by R-38 over the entire ceiling where that depth runs uncompressed 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 air leakage no higher than 3.0 air changes per hour at 50 pascals. For insulation laid entirely above the roof deck the table sets R-30 continuous.
Houses already standing in the village are handled differently. Unaltered portions need not comply, and New York’s code does not require a blower door test when you insulate an existing home. If a renovation strips the plaster from an attic bedroom’s slopes, though, those exposed cavities must be insulated to full depth at a minimum of R-3 per inch. 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 New Hyde Park
Do you install insulation in New Hyde Park, NY?
Yes, in the Village of New Hyde Park on both the North Hempstead and Hempstead sides, and in the surrounding 11040 area. Inside the village our work centers on attics and top floors, in the pre-1940 houses that make up 26.5% of the stock, often with finished attic rooms, and in the 1940s and 50s capes and ranches. Splits, cellar rims and two-families, priced as whole buildings, are part of it too. North New Hyde Park, the separate hamlet to the north, has its own page.
How much does insulation cost in New Hyde Park?
Most projects run $3,500 to $12,500. The top floor drives it: knee wall and eave length, whether slopes fill from the attic or through the ceiling, and whether rafters are shallow enough to need closed cell foam. A ranch ceiling with eaves and a rim costs less. A two-family is priced as one building. After a free walk-through you get a written scope and price.
Are there insulation rebates in New Hyde Park?
Yes. PSEG Long Island supplies the village’s electricity and 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 more for income-qualified homes, paid through its participating contractors after a free Whole House Energy Assessment. Income-eligible owners and renters can check EmPower+ on the MyEnergy portal. Comfort Home cannot be used with PSEG Long Island service, the federal 25C credit ended for work placed in service after 31 December 2025, and New York has no state insulation credit.
Our upstairs bedrooms are unbearable every summer. Will insulation help, or do we need a bigger air conditioner?
Usually insulation and sealing first. In a New Hyde Park cape or pre-war attic room the heat comes through thin rafter bays and from the hot spaces behind the knee walls, and cooled air leaks out the same gaps. Sealing those spaces off, blocking the floor bays, and filling the slopes and upper attic cuts the heat reaching the rooms, and an air conditioner sized afterward can be smaller. A bigger unit under an unsealed roof just works harder.
Free energy audit in New Hyde Park
In a village house we go straight to the top floor: behind the knee-wall doors, up into the attic over the collar ties, along the slopes to see what fills them, and around the chimney, vent and fixtures. A pre-war house also gets a wiring check and a look at its attic stair door; in a two-family, the upper apartment’s ceilings and the shared stair. Then the cellar rim and sill. If the attic is fine and the problem is a leaky knee wall, we say so. You receive a written scope and price; neither costs anything or commits you.
Call 914-825-6824 or use our contact form. We are open 8am–8pm, seven days, and work out of New Rochelle, NY with a 100-plus in-house crew that never subcontracts.
Learn more
- Insulation contractors across Nassau County
- Insulation in Floral Park
- Insulation in Garden City
- Insulation in North New Hyde Park
- Roof and sloped ceiling insulation
- Attic insulation
- Insulating older homes