Concrete slab cost in Washington, DC

Planning more than one job in Washington?

Jobs that often go together with concrete slab are priced below at their usual sizes, using the same Washington wage and price inputs. Compared with national midpoints, asphalt driveway comes out highest (+5%) and concrete driveway lowest (+3%); the gap comes from the trades each job uses.

Cost by quality level and size in Washington

The cited range is split into basic, standard and premium bands, then scaled to Washington. 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).

Optional extras in Washington

Add-ons start from national price ranges and are scaled by 1.03 for Washington, which is the average of the area's wage index (1.02) and goods price index (1.05). The estimator above can add them to your total.

Washington against nearby metros and the rest of the District of Columbia

Of the five closest metros, all are cheaper than Washington. Winchester is the lowest at about $3,500 (midpoint, 400 sq ft), 60 miles away.

Out of the 300 metros we cover, Washington ranks #70 for the cost of this job (#1 is the most expensive). Statewide, Washington is 4% below the District of Columbia figure.

Washington is the only District of Columbia metro we cover, so the statewide page is the only in-state comparison. It uses statewide wages, which include rural areas.

Metros of a similar size

Big cities and small ones price differently, so here is Washington against the 4 metros with the closest total employment.

The best months for concrete slab in Washington

Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Washington Reagan Ap (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 Washington are April through June and August through November: 7 of 12. Outside them, January, February, March and December have an average overnight low of 40°F or below, and July has an average daytime high of 90°F or more.

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.

Heat matters for concrete as well. With average highs of 90°F or more in July, crews often start early, wet the base and plan for faster set times.

Washington gets about 42 inches of precipitation in a normal year, including roughly 14 inches of snow. The wettest months are May, June and July (4.3 inches in July). Inside the workable window, April and November are the driest, at 3.2 and 2.9 inches. The station averages about 40 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.

Who does the work: Washington trade wages

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 Washington the blend is 1.02.

Cement masons and concrete finishers (47-2051), 50% of the weighting: a median of $28.05 an hour, in line with the US median of $27.41. The middle half of them earn between $23.42 and $30.30 an hour. About 2,810 work in the metro. That is 9.0 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 $22.80 an hour, which is in line with the national $22.66. The middle half of them earn between $20.07 and $27.05 an hour. BLS counts 17,710 of them working in the area, 56.5 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 $29.64 an hour, in line with the US median of $28.78. The middle half of them earn between $26.33 and $35.07 an hour. About 6,450 work in the metro. That is 20.6 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 $29.23 an hour, in line with the US median of $29.12. The middle half of them earn between $26.62 and $35.56 an hour. About 13,280 work in the metro. That is 42.3 per 10,000 jobs, compared with 43.1 nationally, so the supply of crews looks typical.

A quick sensitivity check: moving the lead trade (cement masons and concrete finishers) from the median to the 75th percentile wage adds about $65 to the midpoint estimate; the 25th percentile takes off about $140. That is a swing of roughly 3.4% to 1.7% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.

Washington-Arlington-Alexandria has 3,136,190 jobs in total (BLS, May 2025), ranking 6th by size among the 300 metros on this site.

Concrete slab: what moves the price in Washington

• Finish

  A broom finish is the baseline. Stamped, stained, or exposed-aggregate finishes are priced as add-ons on top of the slab.

• Thickness and mix

  A 4-inch slab uses about 1.23 cubic yards of concrete per 100 sq ft; a 6-inch slab uses about 1.85. Stepping up from a 3,000 PSI to a 4,000-4,500 PSI mix adds $10-$40 per cubic yard (Estimators.us).

• 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.