Mount Vernon has a dense stock of older homes on small lots, and the complaint we hear most is the same one: the upstairs is freezing in January and roasting in July.
The honest answer to what it costs: most of our spray foam projects in Mount Vernon run between $3,500 and $12,500. That is the real range we quote, not a teaser figure, and where your house lands inside it depends on the things below.
Attic and air sealing together
Almost every Mount Vernon quote we write pairs attic insulation with air sealing, and that pairing is where the value is. Sealing on its own is inexpensive – it lands near the bottom of our range. Adding insulation on top of a properly sealed attic pushes the job into the middle. Doing the insulation without the sealing costs almost as much and works considerably less well, which is why we will not quote it that way.
What actually moves the price
- Area. Attic, rim joist, crawl space and walls each add square footage. Bigger jobs cost more in total even when the rate per foot is favorable.
- Foam type. Closed cell runs R-6.9 to R-7.1 per inch and doubles as an air and vapor barrier. Open cell is roughly R-3.9 to R-4.2 per inch, more breathable, and lower in cost.
- Target R-value. A higher target means more inches of foam and more material.
- Access. A tight crawl space or a finished wall cavity takes more labor and preparation than an open, walk-in attic.
- Removal. If damp, compressed or pest-damaged material has to come out first, that is a line on the quote.
Why the age of Mount Vernon’s houses matters to the number
Westchester’s housing stock is really old. The median home here was built in 1959, and roughly 27% went up before 1940. That matters for price: older houses tend to have shallow or settled insulation, unsealed attic bypasses around chimneys and plumbing stacks, and an uninsulated rim joist above the foundation. More of the work is preparation and sealing, less is simply adding depth.
Rebates in New York
New York runs energy-efficiency incentive programs through NYSERDA and the utilities, and insulation and air sealing frequently qualify. Which apply depends on your utility and the work involved, so we go through it with you during the audit rather than guessing.
What you get for free before you spend anything
We walk your attic, basement and crawl space, tell you where the house is actually losing heat, and price the work. No charge, no obligation, and no pressure to take the biggest option on the list. Nearly every job is finished the same day, and every installer is our own employee rather than a subcontractor.
Common questions about cost
Is there a minimum job size?
No. Some of the most worthwhile work we do – sealing a rim joist, closing attic bypasses – sits at the bottom of our range and makes a disproportionate difference.
Can I do part of it now and part later?
Yes, and sometimes that is the sensible order. We will tell you which part of the house is costing you the most and what to do first, rather than pushing the biggest job.
Are there rebates that reduce what I pay?
Often, yes. Both New York and New Jersey run energy-efficiency incentive programs that insulation and air sealing frequently qualify for. We check what applies to your actual job during the audit.
Get a real number for your house
Call 914-825-6824 for a free energy audit and estimate in Mount Vernon, or send us a message.
More on the work itself: spray foam insulation, attic insulation, air sealing, and our Mount Vernon page.