Attic insulation cost in Knoxville, TN
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (1,000 sq ft)
- $970 – $3,900
- Per sq ft
- $0.95 – $3.90
- before permit
- Versus US midpoint
- −3%
- US $2,500
- Rank of 300 metros
- #152
- 1 = most expensive
Knoxville homeowners pay roughly $970 to $3,900 to insulate an attic at 1,000 sq ft, or $0.95 to $3.90 per sq ft (permit not included). Against the US midpoint, Knoxville is almost level. Building materials run about 4% below the US average here (BEA goods price index 96.2).
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Estimated cost for 1,000 sq ft in Knoxville, TN, standard level
$1,850 to $3,000
About $1.85 to $3 per sq ft before permits. Labor is about 37% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $1,100 | $1,950 |
| Labor | $730 | $1,050 |
| Permits and fees | $0 | $0 |
| Total | $1,850 | $3,000 |
Cost breakdown for 1,000 sq ft in Knoxville, TN
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $480 | $1,550 | $2,600 | 63% |
| Labor | $490 | $890 | $1,300 | 37% |
| Permits and fees | $0 | $0 | $0 | 0% |
| Total | $970 | $2,450 | $3,900 | 100% |
What is behind the Knoxville number
Labor is 37% of the midpoint bill here, against 36% nationally. The mix of trades behind this job is insulation workers, floor, ceiling and wall (80%), construction laborers (20%). We weight each trade's local median wage by that share and compare it with the national median. In Knoxville the blended ratio comes out at 0.98.
On the materials line, the BEA goods price index for the Knoxville metro is 96.2 (US = 100). The midpoint materials bill for 1,000 sq ft comes to $1,550, compared with $1,600 at national prices. Permit and inspection fees are scaled by the broader index (92.6) and land at $0 to $0.
Why two Knoxville quotes can differ
Type of insulation
Blown-in is $0.90-$2.40 per sq ft and loose-fill is $1.00-$2.50 installed; spray foam costs more (HomeGuide).
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.
How Knoxville compares
Of the five closest metros, all are cheaper than Knoxville. Asheville is the lowest at about $2,350 (midpoint, 1,000 sq ft), 95 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Knoxville, TNthis page | $970 – $3,900 | $2,450 | |
| Asheville, NC95 miles | $930 – $3,800 | $2,350 | −3% |
| Dalton, GA95 miles | $950 – $3,800 | $2,400 | −2% |
| Chattanooga, TN95 miles | $970 – $3,850 | $2,400 | −1% |
| Johnson City, TN100 miles | $960 – $3,850 | $2,400 | −1% |
| Kingsport, TN100 miles | $970 – $3,850 | $2,400 | level |
| Tennessee (statewide) | $970 – $3,850 | $2,400 | level |
| United States | $1,000 – $4,000 | $2,500 | +3% |
Across 300 US metros, Knoxville comes in at #152 from the top. The priciest is San Francisco, CA at $3,150; the cheapest is Morgantown, WV at $2,250 (midpoints, 1,000 sq ft). Statewide, Knoxville is 0% above the Tennessee figure.
Other Tennessee metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Nashville, TN | 1,099,300 jobs | $1,000 – $4,000 | $2,500 | +4% |
| Memphis, TN | 611,670 jobs | $960 – $3,850 | $2,400 | −1% |
| Chattanooga, TN | 268,750 jobs | $970 – $3,850 | $2,400 | −1% |
| Kingsport, TN | 119,560 jobs | $970 – $3,850 | $2,400 | level |
| Clarksville, TN | 103,220 jobs | $960 – $3,850 | $2,400 | −1% |
| Jackson, TN | 84,530 jobs | $970 – $3,850 | $2,400 | level |
Cities with a workforce like Knoxville's
Big cities and small ones price differently, so here is Knoxville against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Greenville, SC | 434,900 jobs | $960 – $3,850 | $2,400 | −1% |
| Baton Rouge, LA | 409,690 jobs | $940 – $3,750 | $2,350 | −3% |
| New Orleans, LA | 445,550 jobs | $940 – $3,750 | $2,350 | −3% |
| Madison, WI | 408,070 jobs | $990 – $3,900 | $2,450 | +1% |
Cost by quality level and size in Knoxville
Three bands are cut from the same cited range and localized for Knoxville wages and prices. They overlap on purpose: a good standard job and a modest premium job can cost the same. The grid below prices the same bands at 3 common sizes.
Basic
$970 to $2,150
Blown-in fiberglass or cellulose to code R-value
Standard
$1,850 to $3,000
Higher R-value with air sealing around fixtures
Premium
$2,700 to $3,900
Spray foam or heavy air sealing, hard-to-reach attic
| Size | Basic | Standard | Premium |
|---|---|---|---|
| small attic (600 sq ft) | $580 – $1,300 | $1,100 – $1,800 | $1,650 – $2,350 |
| average attic (1,000 sq ft) | $970 – $2,150 | $1,850 – $3,000 | $2,700 – $3,900 |
| large attic (1,800 sq ft) | $1,750 – $3,850 | $3,300 – $5,400 | $4,900 – $7,000 |
What nearby projects cost in Knoxville
Because every project leans on different trades, Knoxville's wage level does not move all prices equally. Against the US midpoint, gutters runs −5% and roof replacement −12%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Roof replacement | 2,000 sq ft of roof | $5,300 – $11,100 | −12% |
| Metal roof | 2,000 sq ft of roof | $9,000 – $29,700 | −9% |
| Vinyl siding | 2,100 sq ft of wall | $7,800 – $23,400 | −7% |
| Window replacement | 10 windows | $4,150 – $14,100 | −7% |
| Gutters | 160 linear ft | $1,200 – $4,000 | −5% |
Local wages behind the labor line
Wages are the part of this estimate that changes most from town to town. 2 trades carry the job here, and each is compared with its US median. The weighted result for Knoxville is 0.98 times the national level.
Insulation workers, floor, ceiling and wall (47-2131), 80% of the weighting: a median of $23.26 an hour, in line with the US median of $23.62. The middle half of them earn between $18.94 and $26.25 an hour. About 170 work in the metro. That is 4.0 per 10,000 jobs, compared with 2.9 nationally, which suggests plenty of local crews to bid.
Construction laborers (47-2061), 20% of the weighting: a median of $22.18 an hour, in line with the US median of $22.66. The middle half of them earn between $18.16 and $25.87 an hour. About 3,640 work in the metro. That is 85.7 per 10,000 jobs, compared with 70.5 nationally, which suggests plenty of local crews to bid.
Quotes come from real crews, not medians. If the insulation workers, floor, ceiling and wall on your job are paid at the 75th percentile ($26.25 an hour) instead of the median, the labor line grows by about $90. At the 25th percentile ($18.94) it shrinks by about $130. The total moves by 3.8% or 5.4%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 424,600 jobs in the Knoxville area. That makes it the 59th largest of the 300 metros we cover, with 0.27% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Insulation workers, floor, ceiling and wall (47-2131) | 80% | $18.94 | $23.26 | $26.25 | $23.62 | 0.98 | metro |
| Construction laborers (47-2061) | 20% | $18.16 | $22.18 | $25.87 | $22.66 | 0.98 | metro |
| Blended | 100% | 0.98 | |||||
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Attic insulation in Knoxville: your questions
+How much does it cost to insulate an attic in Knoxville?
For 1,000 sq ft, expect $970 to $3,900 in the Knoxville area. A standard-spec job lands at $1,850 to $3,000. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for attic insulation in Knoxville?
About $0.95 to $3.90 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 Knoxville or Asheville?
Asheville is 95 miles away. The midpoint for 1,000 sq ft there is $2,350, which is 3% less than Knoxville ($2,450). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Knoxville?
About 37% at the midpoint, or $890 out of $2,450. Materials are 63% and permits 0%. Nationally, labor is 36%.
+What would average attic (1,000 sq ft) cost in Knoxville?
$970 to $3,900. Pick a different size in the estimator above to get your own number.
+Does attic insulation need a permit in Knoxville?
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 Knoxville area (our national range of $0 to $0 scaled by the local price level).
+Is Knoxville expensive for attic insulation compared with the rest of Tennessee?
Knoxville is 0% above the Tennessee statewide estimate ($2,400 at the midpoint). We cover 8 metros in Tennessee; see the state page to compare them.
+What do insulation workers, floor, ceiling and wall earn in Knoxville?
The BLS median is $23.26 an hour in the Knoxville area, compared with $23.62 nationally. The 25th to 75th percentile range is $18.94 to $26.25.
+What do basic and premium attic insulation work cost in Knoxville?
For 1,000 sq ft, basic work runs $970 to $2,150 and premium work $2,700 to $3,900. 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 Knoxville
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.