Spray Foam Insulation cost: Duluth vs St. Louis Park (2026)
In 2026, spray foam insulation is about 17% less expensive in Duluth than in St. Louis Park. Most homeowners pay around $3,750 in Duluth versus $4,400 in St. Louis Park — a gap of roughly $650.
Duluth MN
Lower costTypically around $3,750
St. Louis Park MN
Typically around $4,400
Duluth vs St. Louis Park: full breakdown
| Factor | Duluth | St. Louis Park |
|---|---|---|
| Typical 2026 cost | $3,750 | $4,400 |
| Estimated range | $1,500–$6,000 | $1,750–$7,000 |
| Labor index (vs US) | ×0.94 | ×1.1 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.06 | ×1.06 |
| Local permit | None | None |
| Labor share | $2,050 | $2,400 |
| Materials/equipment | $1,700 | $2,000 |
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 17% gap is meaningful on a project this size — about $650. That's real money, but it's often within reach of off-season timing and a tighter apples-to-apples bid in St. Louis Park.
Spray foam insulation by type: Duluth vs St. Louis Park
Every spray foam insulation type gets its own localized price for each metro, using the same labor, climate and permit adjustments — a true apples-to-apples comparison.
| Type | Duluth | St. Louis Park |
|---|---|---|
| Open-cell | $1,500–$4,500 | $1,750–$5,250 |
| Closed-cell | $2,500–$6,950 | $2,900–$8,150 |
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: Duluth vs St. Louis Park
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 | Duluth | St. Louis Park |
|---|---|---|
| 500 sq ft | $900–$2,400 | $1,050–$2,800 |
| 1,000 sq ft | $1,500–$4,000 | $1,750–$4,650 |
| 1,500 sq ft | $2,200–$5,500 | $2,550–$6,400 |
| 2,000+ sq ft | $2,800–$6,450 | $3,250–$7,550 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national spray foam insulation range for local labor, climate and permits.
What insulation pros earn in each metro
Labor is about 55% of a spray foam insulation bill, so local wages drive most of the gap. These are real metro hourly wages for skilled installers (BLS OEWS), not estimates.
No BLS metro wage series for Duluth; we use Minnesota regional price parity instead.
Minneapolis-St. Paul-Bloomington metro · about 18% above the US average installer wage.
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
The fall insulation rush drives prices up because everyone's thinking about the coming winter at once. Book in spring or summer instead, when demand is lower and rebate funds haven't been claimed yet.
How much insulation is worth paying for?
Insulation is one of the few home upgrades where spending more can genuinely pay for itself. Our editors on the choices that decide both cost and payback.
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
Insulation carries some of the strongest incentive money in remodeling, with utility and state rebates covering a real portion of the cost since the federal 25C credit expired at the end of 2025. Look up what applies on DSIRE, then schedule the work while rebate funds are still unclaimed for the year.
The air-sealing case
Blown-in or batt, insulation can only slow the heat that isn't already escaping through gaps and penetrations. Sealing those leaks costs little and frequently buys more comfort per dollar than piling on extra R-value, so confirm it's written into the scope.
Payback is the whole point with insulation, and it arrives fastest when the job is done in full: air-sealing, the DOE-recommended R-value for your climate zone, and whatever utility rebates you qualify for. Trimming any one of those trims the return, not the cost.
Duluth vs St. Louis Park
Is spray foam insulation cheaper in Duluth or St. Louis Park?
Duluth comes out ahead here, at roughly $3,750 for spray foam insulation compared with $4,400 in St. Louis Park — a 17% ($650) gap as of 2026.
Why does spray foam insulation cost more in St. Louis Park than Duluth?
It comes down to labor: St. Louis Park indexes at 1.1 against Duluth's 0.94. The cold-vs-cold climate difference adds to the gap.
How much is spray foam insulation in Duluth, MN?
Expect to pay $1,500 to $6,000 for spray foam insulation in Duluth in 2026, averaging around $3,750.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
No, the seasonal pattern is the same in Duluth and St. Louis Park: book during Spring and summer for about 5–10% in savings. The pre-winter fall rush is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on spray foam insulation cost?
Probably not. Yes, $650 is a real gap, but it's a one-time cost you can partly offset in St. Louis Park 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