Spray Foam Insulation cost: Hilton Head Island vs Mount Pleasant (2026)
Spray foam insulation costs about the same in Hilton Head Island and Mount Pleasant in 2026 — roughly $3,800 in each.
Hilton Head Island SC
Typically around $3,800
Mount Pleasant SC
Typically around $3,800
Hilton Head Island vs Mount Pleasant: full breakdown
| Factor | Hilton Head Island | Mount Pleasant |
|---|---|---|
| Typical 2026 cost | $3,800 | $3,800 |
| Estimated range | $1,500–$6,100 | $1,500–$6,100 |
| Labor index (vs US) | ×0.99 | ×0.99 |
| Climate zone | Hot | Hot |
| Climate factor | ×1.02 | ×1.02 |
| Local permit | None | None |
| Labor share | $2,100 | $2,100 |
| Materials/equipment | $1,700 | $1,700 |
Spray foam insulation numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
A wash — choose on quality, not city
The two metros are effectively a wash for spray foam insulation — pick on contractor quality and timing, not location.
Spray foam insulation by type: Hilton Head Island vs Mount Pleasant
Each spray foam insulation option, priced separately for both metros — the same local labor, climate and permit adjustments applied per city, so you can compare like for like.
| Type | Hilton Head Island | Mount Pleasant |
|---|---|---|
| Open-cell | $1,500–$4,550 | $1,500–$4,550 |
| Closed-cell | $2,550–$7,100 | $2,550–$7,100 |
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: Hilton Head Island vs Mount Pleasant
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 | Hilton Head Island | Mount Pleasant |
|---|---|---|
| 500 sq ft | $900–$2,450 | $900–$2,450 |
| 1,000 sq ft | $1,500–$4,050 | $1,500–$4,050 |
| 1,500 sq ft | $2,250–$5,600 | $2,250–$5,600 |
| 2,000+ sq ft | $2,850–$6,600 | $2,850–$6,600 |
All figures are 2026 localized planning estimates for spray foam insulation — get an actual quote before you commit.
Cheapest time for spray foam insulation in either city
Everyone waits until fall to insulate, which is exactly why fall costs the most. Spring and summer are quieter for installers and often catch a fresh year's rebate budget before it runs dry.
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
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 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 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.
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.
Hilton Head Island vs Mount Pleasant
Is spray foam insulation cheaper in Hilton Head Island or Mount Pleasant?
Practically identical — expect around $3,800 for spray foam insulation whichever city you're in.
Why does spray foam insulation cost more in Mount Pleasant than Hilton Head Island?
The main driver is local labor rates: Mount Pleasant's labor index is 0.99 versus 0.99 in Hilton Head Island. Climate zone (hot vs hot) also shift the total.
How much is spray foam insulation in Hilton Head Island, SC?
Hilton Head Island homeowners can expect $1,500 to $6,100 for spray foam insulation in 2026, with $3,800 the typical number.
When is the cheapest time to buy spray foam insulation — and does it differ by city?
Timing doesn't change by city here — Spring and summer is the cheapest window in both Hilton Head Island and Mount Pleasant, saving roughly 5–10%. Avoid the pre-winter fall rush in either location, when emergency replacements push prices up.
Should I choose where to live based on spray foam insulation cost?
No — the cost is essentially identical between Hilton Head Island and Mount Pleasant. Base the decision on the things that actually vary: contractor reputation, scope, equipment tier and timing.
Compare spray foam insulation in other cities
Updated June 2026 · By Serhat Özçelik