Attic insulation cost in Boulder, CO
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (1,000 sq ft)
- $1,000 – $3,950
- Per sq ft
- $1 – $3.95
- before permit
- Versus US midpoint
- −1%
- US $2,500
- Rank of 300 metros
- #128
- 1 = most expensive
Local price for attic insulation in the Boulder area: $1,000 to $3,950 for 1,000 sq ft. The low end is a basic job on easy ground; the high end is a premium spec with harder access. The midpoint lands close to the US figure. Building materials run about 4% below the US average here (BEA goods price index 96.1).
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Estimated cost for 1,000 sq ft in Boulder, CO, standard level
$1,900 to $3,050
About $1.90 to $3.05 per sq ft before permits. Labor is about 38% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $1,100 | $1,950 |
| Labor | $760 | $1,100 |
| Permits and fees | $0 | $0 |
| Total | $1,900 | $3,050 |
Cost breakdown for 1,000 sq ft in Boulder, CO
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $480 | $1,550 | $2,600 | 62% |
| Labor | $520 | $930 | $1,350 | 38% |
| Permits and fees | $0 | $0 | $0 | 0% |
| Total | $1,000 | $2,450 | $3,950 | 100% |
What is behind the Boulder number
The wage side of the estimate leans on insulation workers, floor, ceiling and wall, who do 80% of the hours on a typical job. Their local median is $24.42 an hour. Add the other trades involved and the blended wage index for Boulder is 1.03 (US = 1.00), which puts labor at 38% of the total. BLS does not publish this trade for the metro, so we used the Colorado statewide median.
Materials are scaled with BEA's regional price parity for goods. Boulder is at 96.1 against 100 for the US, so a materials line of $1,600 nationally becomes $1,550 here (midpoint, 1,000 sq ft). Permits follow the all-items index of 105.2: $0 to $0.
Data note: 80% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Boulder. The wage table below marks each row.
Cost by quality level and size in Boulder
The cited range is split into basic, standard and premium bands, then scaled to Boulder. Bands overlap, because plenty of standard jobs cost as much as a light premium one. Sizes run from small attic (600 sq ft) to large attic (1,800 sq ft).
Basic
$1,000 to $2,150
Blown-in fiberglass or cellulose to code R-value
Standard
$1,900 to $3,050
Higher R-value with air sealing around fixtures
Premium
$2,750 to $3,950
Spray foam or heavy air sealing, hard-to-reach attic
| Size | Basic | Standard | Premium |
|---|---|---|---|
| small attic (600 sq ft) | $600 – $1,300 | $1,150 – $1,850 | $1,650 – $2,350 |
| average attic (1,000 sq ft) | $1,000 – $2,150 | $1,900 – $3,050 | $2,750 – $3,950 |
| large attic (1,800 sq ft) | $1,800 – $3,900 | $3,400 – $5,500 | $4,950 – $7,100 |
Related projects, priced for Boulder
Jobs that often go together with attic insulation are priced below at their usual sizes, using the same Boulder wage and price inputs. Compared with national midpoints, roof replacement comes out highest (level) and gutters lowest (−3%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Roof replacement | 2,000 sq ft of roof | $6,100 – $12,400 | level |
| Metal roof | 2,000 sq ft of roof | $10,000 – $31,700 | −2% |
| Vinyl siding | 2,100 sq ft of wall | $8,200 – $24,500 | −3% |
| Window replacement | 10 windows | $4,450 – $14,800 | −1% |
| Gutters | 160 linear ft | $1,250 – $4,050 | −3% |
Who does the work: Boulder trade wages
The labor line is built from BLS wage data, one trade at a time. This job draws on 2 trades. We compare each trade's local median with the US median, weight the ratios by how much of the job each trade does, and apply the blend to the national labor cost. For Boulder the blend is 1.03.
Insulation workers, floor, ceiling and wall (47-2131) carry 80% of the labor weighting. BLS does not publish this trade for the Boulder metro, so we used the Colorado statewide median: $24.42 an hour against $23.62 for the US. The middle half of them earn between $22.71 and $29.87 an hour.
For construction laborers (47-2061, weighted 20%) the local median is $23.07 an hour, which is in line with the national $22.66. The middle half of them earn between $19.64 and $28.23 an hour. BLS counts 540 of them working in the area, 28.1 for every 10,000 jobs (US: 70.5), so the local bench is thinner than average.
A quick sensitivity check: moving the lead trade (insulation workers, floor, ceiling and wall) from the median to the 75th percentile wage adds about $170 to the midpoint estimate; the 25th percentile takes off about $50. That is a swing of roughly 2.1% to 6.7% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
Boulder has 192,390 jobs in total (BLS, May 2025), ranking 119th by size among the 300 metros on this site.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Insulation workers, floor, ceiling and wall (47-2131) | 80% | $22.71 | $24.42 | $29.87 | $23.62 | 1.03 | state |
| Construction laborers (47-2061) | 20% | $19.64 | $23.07 | $28.23 | $22.66 | 1.02 | metro |
| Blended | 100% | 1.03 | |||||
Is Boulder cheap or dear? The local comparison
Contractors rarely work more than an hour or two from home, so the neighboring metros set a rough ceiling and floor for your quotes. Midpoints for 1,000 sq ft range from $2,400 to $2,600 across Boulder and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Boulder, COthis page | $1,000 – $3,950 | $2,450 | |
| Fort Collins, CO40 miles | $980 – $3,900 | $2,450 | −1% |
| Denver, CO55 miles | $1,050 – $4,100 | $2,550 | +4% |
| Greeley, CO60 miles | $990 – $3,900 | $2,450 | level |
| Cheyenne, WY90 miles | $950 – $3,800 | $2,400 | −4% |
| Colorado Springs, CO95 miles | $1,050 – $4,100 | $2,600 | +5% |
| Colorado (statewide) | $1,000 – $4,000 | $2,500 | +2% |
| United States | $1,000 – $4,000 | $2,500 | +1% |
Out of the 300 metros we cover, Boulder ranks #128 for the cost of this job (#1 is the most expensive). Statewide, Boulder is 2% below the Colorado figure.
Elsewhere in Colorado
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Denver, CO | 1,609,350 jobs | $1,050 – $4,100 | $2,550 | +4% |
| Colorado Springs, CO | 316,060 jobs | $1,050 – $4,100 | $2,600 | +5% |
| Fort Collins, CO | 169,430 jobs | $980 – $3,900 | $2,450 | −1% |
| Greeley, CO | 119,540 jobs | $990 – $3,900 | $2,450 | level |
| Grand Junction, CO | 67,170 jobs | $990 – $3,900 | $2,450 | −1% |
| Pueblo, CO | 61,780 jobs | $990 – $3,900 | $2,450 | level |
Metros of a similar size
Big cities and small ones price differently, so here is Boulder against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Corpus Christi, TX | 192,580 jobs | $950 – $3,800 | $2,350 | −4% |
| Wilmington, NC | 191,280 jobs | $890 – $3,650 | $2,250 | −8% |
| Modesto, CA | 195,230 jobs | $1,050 – $4,200 | $2,650 | +7% |
| Pensacola, FL | 190,480 jobs | $940 – $3,800 | $2,350 | −4% |
Specs and site conditions that change a Boulder bid
Job size
Small attics start around $500 and large ones go up to $6,000 (HomeGuide).
Air sealing and fixture damming
Sealing gaps and damming around recessed lights are part of what moves the price within a type.
Removing old insulation
Old, wet or pest-damaged insulation has to come out first, at extra cost.
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Attic insulation in Boulder: your questions
+How much does it cost to insulate an attic in Boulder?
For 1,000 sq ft, expect $1,000 to $3,950 in the Boulder area. A standard-spec job lands at $1,900 to $3,050. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for attic insulation in Boulder?
About $1 to $3.95 per sq ft for materials and labor, plus $0 to $0 for the permit if one is needed. The US range is $1 to $4.
+Is attic insulation cheaper in Boulder or Fort Collins?
Fort Collins is 40 miles away. The midpoint for 1,000 sq ft there is $2,450, which is 1% less than Boulder ($2,450). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Boulder?
About 38% at the midpoint, or $930 out of $2,450. Materials are 62% and permits 0%. Nationally, labor is 36%.
+What would average attic (1,000 sq ft) cost in Boulder?
$1,000 to $3,950. Pick a different size in the estimator above to get your own number.
+Does attic insulation need a permit in Boulder?
Often, but rules are set by your city or county building office, so call before you hire. Budget $0 to $0 for fees in the Boulder area (our national range of $0 to $0 scaled by the local price level).
+Is Boulder expensive for attic insulation compared with the rest of Colorado?
Boulder is 2% below the Colorado statewide estimate ($2,500 at the midpoint). We cover 7 metros in Colorado; see the state page to compare them.
+What do insulation workers, floor, ceiling and wall earn in Boulder?
BLS has no published metro figure here, so we use the statewide median of $24.42 an hour, compared with $23.62 nationally. The 25th to 75th percentile range is $22.71 to $29.87.
+What do basic and premium attic insulation work cost in Boulder?
For 1,000 sq ft, basic work runs $1,000 to $2,150 and premium work $2,750 to $3,950. Basic means: blown-in fiberglass or cellulose to code R-value. Premium means: spray foam or heavy air sealing, hard-to-reach attic.
Attic insulation near Boulder
Where these numbers come from
Base prices are national ranges from the sources below. We scale labor by local BLS wages, materials by BEA goods prices and permits by the BEA all-items price level. Full method on the methodology page.
- HomeGuide: How Much Does Attic Insulation Cost? (2026) (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
Note on derived figures: Materials = installed price minus HomeGuide's $0.50-$1.30 per sq ft insulation labor, matched low-to-low and high-to-high.