Attic Insulation cost: Denver vs Longmont (2026)
In 2026, attic insulation is about 9% more expensive in Denver than in Longmont. Most homeowners pay around $4,400 in Denver versus $4,050 in Longmont — a gap of roughly $350.
Denver CO
Typically around $4,400
Longmont CO
Lower costTypically around $4,050
Denver vs Longmont: full breakdown
| Factor | Denver | Longmont |
|---|---|---|
| Typical 2026 cost | $4,400 | $4,050 |
| Estimated range | $1,750–$7,000 | $1,600–$6,500 |
| Labor index (vs US) | ×1.08 | ×1 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.08 | ×1.08 |
| Local permit | None | None |
| Labor share | $2,400 | $2,250 |
| Materials/equipment | $2,000 | $1,800 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national attic insulation range for local labor, climate and permits.
Denver vs Longmont
Is attic insulation cheaper in Denver or Longmont?
In 2026, attic insulation is cheaper in Longmont at about $4,050, versus $4,400 in Denver — a difference of about $350 (9%).
Why does attic insulation cost more in Denver than Longmont?
The main driver is local labor rates: Denver's labor index is 1.08 versus 1 in Longmont. Climate zone (cold vs cold) also shift the total.
How much is attic insulation in Denver, CO?
In Denver, attic insulation typically runs $1,750–$7,000 in 2026, with most homeowners paying around $4,400.
Updated June 2026 · By Costadia Editorial