Spray Foam Insulation cost: Peoria vs Rockford (2026)
In 2026, spray foam insulation is about 1% less expensive in Peoria than in Rockford. Most homeowners pay around $3,750 in Peoria versus $3,800 in Rockford — a gap of roughly $50.
Peoria IL
Lower costTypically around $3,750
Rockford IL
Typically around $3,800
Peoria vs Rockford: full breakdown
| Factor | Peoria | Rockford |
|---|---|---|
| Typical 2026 cost | $3,750 | $3,800 |
| Estimated range | $1,500–$6,000 | $1,500–$6,050 |
| Labor index (vs US) | ×0.95 | ×0.95 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,050 | $2,100 |
| Materials/equipment | $1,700 | $1,700 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
How much should this gap actually matter?
A 1% difference on spray foam insulation is minor — you'll typically see a wider spread just from getting multiple quotes in the same city, so don't let location drive the decision.
Spray foam insulation by type: Peoria vs Rockford
We localize each spray foam insulation type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Peoria | Rockford |
|---|---|---|
| Open-cell | $1,500–$4,500 | $1,500–$4,550 |
| Closed-cell | $2,500–$7,000 | $2,500–$7,050 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
Spray foam insulation by area: Peoria vs Rockford
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 | Peoria | Rockford |
|---|---|---|
| 500 sq ft | $900–$2,400 | $900–$2,400 |
| 1,000 sq ft | $1,500–$4,000 | $1,500–$4,050 |
| 1,500 sq ft | $2,200–$5,500 | $2,200–$5,550 |
| 2,000+ sq ft | $2,800–$6,500 | $2,800–$6,550 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
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?
Three choices shape an insulation budget — target R-value, whether air-sealing is included, and material type. Our editors weigh how each affects payback.
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.
The R-value case
Aim for the R-value the DOE assigns your zone, not a round number that sounds close enough. Every point you fall short is comfort you don't feel and utility savings you never bank — savings that would have covered the extra material several times over.
The rebate case
Few home projects come with rebate support like insulation does — utility and state programs routinely offset a meaningful slice of the bill (the federal 25C credit closed in December 2025). Run your address through DSIRE first, and book when a program's yearly budget has just refilled.
Of every home upgrade, insulation rewards doing it right the most: air-seal first, meet the DOE R-value for your climate zone, and use the rebates on the table. Cutting the scope here just delays the payback.
Peoria vs Rockford
Is spray foam insulation cheaper in Peoria or Rockford?
Peoria wins on price: spray foam insulation runs about $3,750 there versus $3,800 in Rockford, a gap of roughly $50 (1%) as of 2026.
Why does spray foam insulation cost more in Rockford than Peoria?
Rockford's higher labor index (0.95 vs 0.95 in Peoria) is the biggest factor, with the cold/cold climate split playing a smaller role.
How much is spray foam insulation in Peoria, IL?
In Peoria, spray foam insulation typically runs $1,500–$6,000 in 2026, with most homeowners paying around $3,750.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
It doesn't vary by location — Spring and summer is the discount window in both Peoria and Rockford (roughly 5–10% off), while the pre-winter fall rush tends to be the most expensive in either city.
Should I choose where to live based on spray foam insulation cost?
Probably not. Yes, $50 is a real gap, but it's a one-time cost you can partly offset in Rockford with off-season timing and tighter bids. Long-term factors like energy prices and home condition matter more than this one number.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik