Attic insulation cost in Modesto, CA
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (1,000 sq ft)
- $1,050 – $4,200
- Per sq ft
- $1.05 – $4.20
- before permit
- Versus US midpoint
- +5%
- US $2,500
- Rank of 300 metros
- #38
- 1 = most expensive
Attic insulation in Modesto, CA usually costs $1,050 to $4,200 for 1,000 sq ft. That works out to about $1.05 to $4.20 per sq ft before permits. Compared with the national midpoint that is $130 more. Building materials run about 5% above the US average here (BEA goods price index 105.2).
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Estimated cost for 1,000 sq ft in Modesto, CA, standard level
$2,000 to $3,250
About $2 to $3.25 per sq ft before permits. Labor is about 36% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $1,200 | $2,150 |
| Labor | $780 | $1,100 |
| Permits and fees | $0 | $0 |
| Total | $2,000 | $3,250 |
Cost breakdown for 1,000 sq ft in Modesto, CA
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $530 | $1,700 | $2,850 | 64% |
| Labor | $530 | $950 | $1,350 | 36% |
| Permits and fees | $0 | $0 | $0 | 0% |
| Total | $1,050 | $2,650 | $4,200 | 100% |
What is behind the Modesto number
We price the labor side from BLS wage data for 2 trades: insulation workers, floor, ceiling and wall at 80%, construction laborers at 20%. Weighted together, Modesto wages are 1.05 times the national level. Labor makes up about 36% of the midpoint estimate (36% at national prices). BLS does not publish this trade for the metro, so we used the California statewide median.
Materials are scaled with BEA's regional price parity for goods. Modesto is at 105.2 against 100 for the US, so a materials line of $1,600 nationally becomes $1,700 here (midpoint, 1,000 sq ft). Permits follow the all-items index of 104.1: $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 Modesto. The wage table below marks each row.
How Modesto compares
Same job, same size (1,000 sq ft), priced for the nearest metros. San Jose is the priciest of the group at $2,800. Merced is the cheapest at $2,600.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Modesto, CAthis page | $1,050 – $4,200 | $2,650 | |
| Stockton, CA30 miles | $1,050 – $4,200 | $2,600 | level |
| Merced, CA30 miles | $1,050 – $4,150 | $2,600 | −1% |
| San Jose, CA50 miles | $1,150 – $4,450 | $2,800 | +7% |
| Santa Cruz, CA65 miles | $1,050 – $4,200 | $2,600 | level |
| Vallejo, CA70 miles | $1,050 – $4,200 | $2,650 | level |
| California (statewide) | $1,050 – $4,250 | $2,650 | +1% |
| United States | $1,000 – $4,000 | $2,500 | −5% |
Out of the 300 metros we cover, Modesto ranks #38 for the cost of this job (#1 is the most expensive). Statewide, Modesto is 1% below the California figure.
Elsewhere in California
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Los Angeles, CA | 6,271,560 jobs | $1,050 – $4,250 | $2,650 | level |
| San Francisco, CA | 2,373,920 jobs | $1,300 – $4,950 | $3,150 | +19% |
| Riverside, CA | 1,716,760 jobs | $1,000 – $4,050 | $2,550 | −4% |
| San Diego, CA | 1,538,060 jobs | $1,050 – $4,250 | $2,650 | +1% |
| San Jose, CA | 1,134,970 jobs | $1,150 – $4,450 | $2,800 | +7% |
| Sacramento, CA | 1,080,590 jobs | $1,050 – $4,200 | $2,600 | level |
Metros of a similar size
Big cities and small ones price differently, so here is Modesto against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Savannah, GA | 198,360 jobs | $920 – $3,750 | $2,350 | −12% |
| Corpus Christi, TX | 192,580 jobs | $950 – $3,800 | $2,350 | −10% |
| Manchester, NH | 199,560 jobs | $1,000 – $4,000 | $2,500 | −5% |
| Boulder, CO | 192,390 jobs | $1,000 – $3,950 | $2,450 | −6% |
Pick a size, pick a tier: attic insulation pricing in Modesto
The cited range is split into basic, standard and premium bands, then scaled to Modesto. 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
$1,050 to $2,300
Blown-in fiberglass or cellulose to code R-value
Standard
$2,000 to $3,250
Higher R-value with air sealing around fixtures
Premium
$2,950 to $4,200
Spray foam or heavy air sealing, hard-to-reach attic
| Size | Basic | Standard | Premium |
|---|---|---|---|
| small attic (600 sq ft) | $630 – $1,400 | $1,200 – $1,950 | $1,750 – $2,500 |
| average attic (1,000 sq ft) | $1,050 – $2,300 | $2,000 – $3,250 | $2,950 – $4,200 |
| large attic (1,800 sq ft) | $1,900 – $4,150 | $3,600 – $5,850 | $5,300 – $7,550 |
Specs and site conditions that change a Modesto 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.
What local crews earn in Modesto
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 Modesto the blend is 1.05.
Insulation workers, floor, ceiling and wall (47-2131) carry 80% of the labor weighting. BLS does not publish this trade for the Modesto metro, so we used the California statewide median: $23.48 an hour against $23.62 for the US. The middle half of them earn between $21.78 and $35.41 an hour.
For construction laborers (47-2061, weighted 20%) the local median is $29.15 an hour, which is 29% above the national $22.66. The middle half of them earn between $22.89 and $38.02 an hour. BLS counts 1,070 of them working in the area, 54.8 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 $360 to the midpoint estimate; the 25th percentile takes off about $50. That is a swing of roughly 2.0% to 13.8% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
Modesto has 195,230 jobs in total (BLS, May 2025), ranking 117th 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% | $21.78 | $23.48 | $35.41 | $23.62 | 0.99 | state |
| Construction laborers (47-2061) | 20% | $22.89 | $29.15 | $38.02 | $22.66 | 1.29 | metro |
| Blended | 100% | 1.05 | |||||
Planning more than one job in Modesto?
Jobs that often go together with attic insulation are priced below at their usual sizes, using the same Modesto wage and price inputs. Compared with national midpoints, vinyl siding comes out highest (+14%) and window replacement lowest (+7%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Roof replacement | 2,000 sq ft of roof | $6,900 – $13,900 | +12% |
| Metal roof | 2,000 sq ft of roof | $11,500 – $35,800 | +11% |
| Vinyl siding | 2,100 sq ft of wall | $9,600 – $28,800 | +14% |
| Window replacement | 10 windows | $4,850 – $16,100 | +7% |
| Gutters | 160 linear ft | $1,450 – $4,600 | +10% |
Get 3 local quotes
Tell us about the job and we will try to connect you with up to three local contractors for written quotes. It is free and you are under no obligation to hire. Your estimate of $2,000 to $3,250 for Modesto, CA is attached.
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Attic insulation in Modesto: your questions
+How much does it cost to insulate an attic in Modesto?
For 1,000 sq ft, expect $1,050 to $4,200 in the Modesto area. A standard-spec job lands at $2,000 to $3,250. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for attic insulation in Modesto?
About $1.05 to $4.20 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 Modesto or Stockton?
Stockton is 30 miles away. The midpoint for 1,000 sq ft there is $2,600, which is 0% less than Modesto ($2,650). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Modesto?
About 36% at the midpoint, or $950 out of $2,650. Materials are 64% and permits 0%. Nationally, labor is 36%.
+What would average attic (1,000 sq ft) cost in Modesto?
$1,050 to $4,200. Pick a different size in the estimator above to get your own number.
+Does attic insulation need a permit in Modesto?
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 Modesto area (our national range of $0 to $0 scaled by the local price level).
+Is Modesto expensive for attic insulation compared with the rest of California?
Modesto is 1% below the California statewide estimate ($2,650 at the midpoint). We cover 23 metros in California; see the state page to compare them.
+What do insulation workers, floor, ceiling and wall earn in Modesto?
BLS has no published metro figure here, so we use the statewide median of $23.48 an hour, compared with $23.62 nationally. The 25th to 75th percentile range is $21.78 to $35.41.
+What do basic and premium attic insulation work cost in Modesto?
For 1,000 sq ft, basic work runs $1,050 to $2,300 and premium work $2,950 to $4,200. 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 Modesto
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.