Spray Foam Insulation cost: Cambridge vs Leominster (2026)
Budget-wise, spray foam insulation in Cambridge ($4,500) runs 10% more than in Leominster ($4,100), a roughly $400 spread.
Cambridge MA
Typically around $4,500
Leominster MA
Lower costTypically around $4,100
Cambridge vs Leominster: full breakdown
| Factor | Cambridge | Leominster |
|---|---|---|
| Typical 2026 cost | $4,500 | $4,100 |
| Estimated range | $1,800–$7,200 | $1,650–$6,550 |
| Labor index (vs US) | ×1.13 | ×1.03 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,500 | $2,250 |
| Materials/equipment | $2,000 | $1,850 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
How much should this gap actually matter?
A 10% gap is meaningful on a project this size — about $400. That's real money, but it's often within reach of off-season timing and a tighter apples-to-apples bid in Cambridge.
Spray foam insulation by type: Cambridge vs Leominster
Below, each spray foam insulation option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Cambridge | Leominster |
|---|---|---|
| Open-cell | $1,800–$5,400 | $1,650–$4,900 |
| Closed-cell | $3,000–$8,350 | $2,700–$7,600 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Spray foam insulation by area: Cambridge vs Leominster
Spray foam is priced by board foot (1 sq ft at 1 inch thick), which works out to about $1.50–$5 per sq ft of surface installed depending on foam type and thickness. Closed-cell costs more but adds twice the R-value per inch.
| Size | Cambridge | Leominster |
|---|---|---|
| 500 sq ft | $1,100–$2,850 | $1,000–$2,600 |
| 1,000 sq ft | $1,800–$4,800 | $1,650–$4,350 |
| 1,500 sq ft | $2,650–$6,600 | $2,400–$6,000 |
| 2,000+ sq ft | $3,350–$7,750 | $3,050–$7,100 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
What insulation pros earn in each metro
Roughly 55% of what you pay for spray foam insulation is labor, which is why local wages explain most of the price gap. The numbers below are actual metro wages for skilled installers, sourced from BLS OEWS — not guesses.
Boston-Cambridge-Newton metro · about 23% above the US average installer wage.
No BLS metro wage series for Leominster; we use Massachusetts regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for spray foam insulation in either city
Demand for insulation spikes every fall as winter approaches, pushing prices with it. Spring and summer avoid that crowd, and utility rebate pools are frequently still fresh that early in the year.
How much insulation is worth paying for?
Where an insulation budget lands depends less on square footage than on three calls — the R-value you target, whether air-sealing rides along, and which material fills the cavity.
The rebate case
Insulation has some of the best rebate math in home improvement — utility and state programs can cover a solid share (the federal 25C credits ended Dec 2025). Check DSIRE before you book and time it to a fresh rebate budget.
The R-value case
The DOE publishes a target R-value for every climate zone, and there's a reason to reach it: stopping short shaves a little off install day but forfeits years of lower energy bills and steadier indoor temperatures. Under-insulating is the one shortcut here that never actually pays.
The air-sealing case
Insulation without air-sealing underperforms. Sealing leaks first is cheap and often delivers more comfort per dollar than thicker insulation alone — make sure it's in the scope.
Air-seal before you insulate, hit the DOE-recommended R-value for your zone, and claim every rebate you're eligible for — insulation is a rare case where doing the full job is also the cheapest one, long-term.
Cambridge vs Leominster
Is spray foam insulation cheaper in Cambridge or Leominster?
Leominster wins on price: spray foam insulation runs about $4,100 there versus $4,500 in Cambridge, a gap of roughly $400 (10%) as of 2026.
Why does spray foam insulation cost more in Cambridge than Leominster?
Cambridge's higher labor index (1.13 vs 1.03 in Leominster) is the biggest factor, with the cold/cold climate split playing a smaller role.
How much is spray foam insulation in Cambridge, MA?
spray foam insulation in Cambridge runs $1,800–$7,200 as of 2026 — most jobs land near $4,500.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
The best window is the same in both Cambridge and Leominster: Spring and summer, when demand drops and installers discount to keep crews busy — typically 5–10% off peak pricing. The most expensive time anywhere is an emergency replacement during the pre-winter fall rush.
Should I choose where to live based on spray foam insulation cost?
That would be a stretch. $400 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in Cambridge can close a good chunk of it. What matters more long-term is energy costs, climate and the condition of the home.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik