Spray Foam Insulation cost: Annapolis vs Frederick (2026)
Annapolis runs 10% higher than Frederick for spray foam insulation — expect around $3,950 in Annapolis against $3,600 in Frederick, a difference of about $350.
Annapolis MD
Typically around $3,950
Frederick MD
Lower costTypically around $3,600
Annapolis vs Frederick: full breakdown
| Factor | Annapolis | Frederick |
|---|---|---|
| Typical 2026 cost | $3,950 | $3,600 |
| Estimated range | $1,550–$6,300 | $1,450–$5,750 |
| Labor index (vs US) | ×1.05 | ×0.96 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | None | None |
| Labor share | $2,150 | $2,000 |
| Materials/equipment | $1,800 | $1,600 |
Treat these as 2026 localized estimates for spray foam insulation, not quotes from a contractor.
Is the gap worth worrying about?
That's a real $350 difference (10%) on spray foam insulation — worth factoring in, though off-season timing and a tighter quote in Annapolis can narrow it.
Spray foam insulation by type: Annapolis vs Frederick
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 | Annapolis | Frederick |
|---|---|---|
| Open-cell | $1,550–$4,700 | $1,450–$4,350 |
| Closed-cell | $2,600–$7,350 | $2,400–$6,750 |
These are 2026 planning figures for spray foam insulation, localized to each city — not formal quotes.
Spray foam insulation by area: Annapolis vs Frederick
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 | Annapolis | Frederick |
|---|---|---|
| 500 sq ft | $950–$2,500 | $850–$2,300 |
| 1,000 sq ft | $1,550–$4,200 | $1,450–$3,850 |
| 1,500 sq ft | $2,300–$5,750 | $2,100–$5,300 |
| 2,000+ sq ft | $2,950–$6,800 | $2,700–$6,250 |
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
About 55% of a spray foam insulation bill goes to labor, so wage differences between these two metros matter more than almost anything else. These are real, government-sourced (BLS OEWS) installer wages, not estimates.
Baltimore-Columbia-Towson metro · about 9% above the US average installer wage.
No BLS metro wage series for Frederick; we use Maryland 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
Everyone insulates in fall before winter, so that's the busy, full-price season. Booking in spring or summer catches off-peak pricing — and utility rebate budgets are often freshest early in the year.
How much insulation is worth paying for?
R-value, air-sealing and material decide both the price and the payback. Our editors on the trade-offs.
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 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 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.
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.
Annapolis vs Frederick
Is spray foam insulation cheaper in Annapolis or Frederick?
Frederick wins on price: spray foam insulation runs about $3,600 there versus $3,950 in Annapolis, a gap of roughly $350 (10%) as of 2026.
Why does spray foam insulation cost more in Annapolis than Frederick?
The main driver is local labor rates: Annapolis's labor index is 1.05 versus 0.96 in Frederick. Climate zone (mixed vs mixed) also shift the total.
How much is spray foam insulation in Annapolis, MD?
Annapolis homeowners can expect $1,550 to $6,300 for spray foam insulation in 2026, with $3,950 the typical number.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
No, the seasonal pattern is the same in Annapolis and Frederick: 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, $350 is a real gap, but it's a one-time cost you can partly offset in Annapolis 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