Concrete slab cost in Boulder, CO
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (400 sq ft)
- $2,450 – $5,200
- Per sq ft
- $6.05 – $12
- before permit
- Versus US midpoint
- Level
- US $3,850
- Rank of 300 metros
- #111
- 1 = most expensive
A concrete slab in Boulder, CO usually costs $2,450 to $5,200 for 400 sq ft. That works out to about $6.05 to $12 per sq ft before permits. That is within a few percent of the national midpoint, so there is little local premium or discount. Cement masons and concrete finishers earn a median of $29.00 an hour in the Boulder area, 6% above the US median of $27.41.
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Estimated cost for 400 sq ft in Boulder, CO, standard level
$3,300 to $4,400
About $7.80 to $10 per sq ft before permits. Labor is about 44% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $1,600 | $2,250 |
| Labor | $1,500 | $1,850 |
| Permits and fees | $160 | $310 |
| Total | $3,300 | $4,400 |
Cost breakdown for 400 sq ft in Boulder, CO
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $1,150 | $1,900 | $2,700 | 50% |
| Labor | $1,250 | $1,700 | $2,100 | 44% |
| Permits and fees | $55 | $240 | $420 | 6% |
| Total | $2,450 | $3,850 | $5,200 | 100% |
Why Boulder prices look the way they do
Labor is 44% of the midpoint bill here, against 42% nationally. The mix of trades behind this job is cement masons and concrete finishers (50%), construction laborers (30%), operating engineers and other construction equipment operators (10%), carpenters (10%). We weight each trade's local median wage by that share and compare it with the national median. In Boulder the blended ratio comes out at 1.05.
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 $2,000 nationally becomes $1,900 here (midpoint, 400 sq ft). Permits follow the all-items index of 105.2: $55 to $420.
Why two Boulder quotes can differ
Base and reinforcement
A compacted gravel base, vapor barrier, and wire mesh or rebar are priced separately by some contractors and bundled by others. Ask which one your quote does.
Truck and pump access
If the mixer truck can't back up to the forms, someone has to wheelbarrow it in or hire a pump. Pump or line-pump hire is typically billed per day.
Small-job minimums
Many crews have a minimum charge, so a 10x10 pad can cost more per square foot than a 20x20 slab.
Boulder: what basic, standard and premium work costs
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 10x10 pad (100 sq ft) to 30x40 foundation (1,200 sq ft).
Basic
$2,450 to $3,550
4-inch broom-finish slab, light mesh, easy truck access
Standard
$3,300 to $4,400
4-5 inch slab with rebar or heavier mesh and standard base prep
Premium
$4,100 to $5,200
6-inch slab, heavy reinforcement, thick base, pump truck or tight access
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x10 pad (100 sq ft) | $660 – $1,050 | $950 – $1,350 | $1,250 – $1,600 |
| 12x12 (144 sq ft) | $920 – $1,400 | $1,300 – $1,800 | $1,650 – $2,150 |
| 20x20 (400 sq ft) | $2,450 – $3,550 | $3,300 – $4,400 | $4,100 – $5,200 |
| 24x24 garage floor (576 sq ft) | $3,550 – $5,050 | $4,650 – $6,200 | $5,800 – $7,300 |
| 30x40 foundation (1,200 sq ft) | $7,300 – $10,300 | $9,550 – $12,500 | $11,800 – $14,800 |
Optional extras in Boulder
Add-ons start from national price ranges and are scaled by 1.01 for Boulder, which is the average of the area's wage index (1.05) and goods price index (0.96). The estimator above can add them to your total.
| Add-on | Local range |
|---|---|
| Add rebar reinforcement | $400 – $1,200 |
| Remove old concrete first | $800 – $2,400 |
Boulder weather and the concrete slab calendar
Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Boulder (5 miles from the city center). They are 30-year averages, so any one year can run hotter, colder or wetter.
For pouring concrete, the comfortable months in Boulder are May through September: 5 of 12. Outside them, January, February, March, April, October, November and December have an average overnight low of 40°F or below.
The 40°F line is a deliberately cautious stand-in. The American Concrete Institute's cold-weather guide (ACI 306R-16) defines cold-weather concreting around an average daily air temperature below 40°F, which is colder than our test of an average overnight low at or below 40°F, so we flag a few extra shoulder months. In cold weather crews may need heated enclosures, insulating blankets or accelerated mixes, and those measures can raise a quote.
Boulder gets about 21 inches of precipitation in a normal year, including roughly 93 inches of snow. The wettest months are April, May and September (3.2 inches in May). Inside the workable window, July and August are the driest, at 1.8 and 1.7 inches. The station averages about 33 days a year at 90°F or above.
We do not adjust the estimate by month, because we have no reliable published data on seasonal pricing. It is still worth asking contractors whether an off-peak start date changes their bid.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 47 | 22 | 0.8 | Cold |
| Feb | 48 | 22 | 1.0 | Cold |
| Mar | 57 | 29 | 2.0 | Cold |
| Apr | 63 | 35 | 3.0 | Cold |
| May | 71 | 43 | 3.2 | Workable |
| Jun | 83 | 51 | 1.9 | Workable |
| Jul | 88 | 57 | 1.8 | Workable |
| Aug | 86 | 56 | 1.7 | Workable |
| Sep | 79 | 48 | 2.1 | Workable |
| Oct | 66 | 37 | 1.6 | Cold |
| Nov | 55 | 28 | 1.2 | Cold |
| Dec | 46 | 21 | 0.8 | Cold |
Related projects, priced for Boulder
Jobs that often go together with concrete slab are priced below at their usual sizes, using the same Boulder wage and price inputs. Compared with national midpoints, gravel driveway comes out highest (+3%) and detached garage lowest (−1%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Concrete driveway | 600 sq ft | $3,700 – $9,450 | +2% |
| Concrete patio | 300 sq ft | $1,250 – $4,100 | +2% |
| Detached garage | 576 sq ft | $28,500 – $57,200 | −1% |
| Stamped concrete | 400 sq ft | $3,250 – $8,050 | +1% |
| Asphalt driveway | 600 sq ft | $3,100 – $7,600 | +2% |
| Gravel driveway | 1,000 sq ft | $2,600 – $10,500 | +3% |
What local crews earn in Boulder
The labor line is built from BLS wage data, one trade at a time. This job draws on 4 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 1.05.
Cement masons and concrete finishers (47-2051), 50% of the weighting: a median of $29.00 an hour, 6% above the US median of $27.41. The middle half of them earn between $23.59 and $32.25 an hour. About 150 work in the metro. That is 7.8 per 10,000 jobs, compared with 13.3 nationally, so expect fewer local crews to bid.
For construction laborers (47-2061, weighted 30%) 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.
Operating engineers and other construction equipment operators (47-2073), 10% of the weighting: a median of $34.16 an hour, 19% above the US median of $28.78. The middle half of them earn between $29.51 and $38.37 an hour. About 190 work in the metro. That is 9.9 per 10,000 jobs, compared with 30.7 nationally, so expect fewer local crews to bid.
Carpenters (47-2031), 10% of the weighting: a median of $28.73 an hour, in line with the US median of $29.12. The middle half of them earn between $23.92 and $35.50 an hour. About 540 work in the metro. That is 28.1 per 10,000 jobs, compared with 43.1 nationally, so expect fewer local crews to bid.
A quick sensitivity check: moving the lead trade (cement masons and concrete finishers) from the median to the 75th percentile wage adds about $95 to the midpoint estimate; the 25th percentile takes off about $160. That is a swing of roughly 4.1% to 2.5% 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 |
|---|---|---|---|---|---|---|---|
| Cement masons and concrete finishers (47-2051) | 50% | $23.59 | $29.00 | $32.25 | $27.41 | 1.06 | metro |
| Construction laborers (47-2061) | 30% | $19.64 | $23.07 | $28.23 | $22.66 | 1.02 | metro |
| Operating engineers and other construction equipment operators (47-2073) | 10% | $29.51 | $34.16 | $38.37 | $28.78 | 1.19 | metro |
| Carpenters (47-2031) | 10% | $23.92 | $28.73 | $35.50 | $29.12 | 0.99 | metro |
| Blended | 100% | 1.05 | |||||
Is Boulder cheap or dear? The local comparison
Same job, same size (400 sq ft), priced for the nearest metros. Denver is the priciest of the group at $3,950. Greeley is the cheapest at $3,750.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Boulder, COthis page | $2,450 – $5,200 | $3,850 | |
| Fort Collins, CO40 miles | $2,450 – $5,150 | $3,800 | −1% |
| Denver, CO55 miles | $2,550 – $5,400 | $3,950 | +3% |
| Greeley, CO60 miles | $2,400 – $5,100 | $3,750 | −2% |
| Cheyenne, WY90 miles | $2,400 – $5,100 | $3,750 | −2% |
| Colorado Springs, CO95 miles | $2,400 – $5,150 | $3,800 | −2% |
| Colorado (statewide) | $2,500 – $5,250 | $3,900 | +1% |
| United States | $2,450 – $5,200 | $3,850 | level |
Out of the 300 metros we cover, Boulder ranks #111 for the cost of this job (#1 is the most expensive). Statewide, Boulder is 1% below the Colorado figure.
Elsewhere in Colorado
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Denver, CO | 1,609,350 jobs | $2,550 – $5,400 | $3,950 | +3% |
| Colorado Springs, CO | 316,060 jobs | $2,400 – $5,150 | $3,800 | −2% |
| Fort Collins, CO | 169,430 jobs | $2,450 – $5,150 | $3,800 | −1% |
| Greeley, CO | 119,540 jobs | $2,400 – $5,100 | $3,750 | −2% |
| Grand Junction, CO | 67,170 jobs | $2,350 – $5,000 | $3,700 | −4% |
| Pueblo, CO | 61,780 jobs | $2,350 – $5,000 | $3,700 | −4% |
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 | $2,200 – $4,700 | $3,450 | −10% |
| Wilmington, NC | 191,280 jobs | $2,200 – $4,800 | $3,500 | −9% |
| Modesto, CA | 195,230 jobs | $2,900 – $6,000 | $4,450 | +16% |
| Pensacola, FL | 190,480 jobs | $2,200 – $4,800 | $3,500 | −9% |
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Concrete slab in Boulder: your questions
+How much does it cost to pour a concrete slab in Boulder?
For 400 sq ft, expect $2,450 to $5,200 in the Boulder area. A standard-spec job lands at $3,300 to $4,400. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for concrete slab in Boulder?
About $6.05 to $12 per sq ft for materials and labor, plus $55 to $420 for the permit if one is needed. The US range is $6 to $12.
+Is concrete slab cheaper in Boulder or Fort Collins?
Fort Collins is 40 miles away. The midpoint for 400 sq ft there is $3,800, which is 1% less than Boulder ($3,850). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Boulder?
About 44% at the midpoint, or $1,700 out of $3,850. Materials are 50% and permits 6%. Nationally, labor is 42%.
+What would 20x20 (400 sq ft) cost in Boulder?
$2,450 to $5,200. Pick a different size in the estimator above to get your own number.
+Does concrete slab need a permit in Boulder?
Often, but rules are set by your city or county building office, so call before you hire. Budget $55 to $420 for fees in the Boulder area (our national range of $50 to $400 scaled by the local price level).
+Is Boulder expensive for concrete slab compared with the rest of Colorado?
Boulder is 1% below the Colorado statewide estimate ($3,900 at the midpoint). We cover 7 metros in Colorado; see the state page to compare them.
+What do cement masons and concrete finishers earn in Boulder?
The BLS median is $29.00 an hour in the Boulder area, compared with $27.41 nationally. The 25th to 75th percentile range is $23.59 to $32.25.
+What do basic and premium concrete slab work cost in Boulder?
For 400 sq ft, basic work runs $2,450 to $3,550 and premium work $4,100 to $5,200. Basic means: 4-inch broom-finish slab, light mesh, easy truck access. Premium means: 6-inch slab, heavy reinforcement, thick base, pump truck or tight access.
+When is the best time to pour a concrete slab in Boulder?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are May through September. July and August are typically the driest of those months. Local contractors' schedules matter as much as the weather, so book early for the busy months.
+What does "add rebar reinforcement" add in Boulder?
$400 to $1,200 for 400 sq ft, from a national range scaled by the local wage and goods indexes.
Concrete slab 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 a Concrete Slab Cost? (2026) (accessed November 4, 2026)
- Estimators.us: Concrete Slab Cost in 2026 | $6-$12/Sq Ft Guide (accessed November 4, 2026)
- HomeGuide: How Much Does a Concrete Patio Cost? (2026) (accessed November 4, 2026)
- HomeGuide: How Much Does a Concrete Driveway Cost? (2026) (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
- NOAA NCEI U.S. Climate Normals, 1991-2020