Concrete slab cost in Riverside, CA

The best months for concrete slab in Riverside

Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Riverside Fire Stn 3 (in the city). They are 30-year averages, so any one year can run hotter, colder or wetter.

For pouring concrete, the comfortable months in Riverside are October through June: 9 of 12. Outside them, July, August and September have an average daytime high of 90°F or more.

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

Riverside gets about 10 inches of precipitation in a normal year. The wettest months are January, February and March (2.5 inches in February). Inside the workable window, May and June are the driest, at 0.2 and 0.1 inches. The station averages about 110 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.

Cost by quality level and size in Riverside

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

Who does the work: Riverside 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 Riverside the blend is 1.15.

Cement masons and concrete finishers (47-2051), 50% of the weighting: a median of $28.63 an hour, 4% above the US median of $27.41. The middle half of them earn between $23.24 and $40.30 an hour. About 4,740 work in the metro. That is 27.6 per 10,000 jobs, compared with 13.3 nationally, which suggests plenty of local crews to bid.

For construction laborers (47-2061, weighted 30%) the local median is $28.61 an hour, which is 26% above the national $22.66. The middle half of them earn between $22.57 and $37.37 an hour. BLS counts 12,120 of them working in the area, 70.6 for every 10,000 jobs (US: 70.5), so the local bench is about average.

Operating engineers and other construction equipment operators (47-2073), 10% of the weighting: a median of $37.85 an hour, 32% above the US median of $28.78. The middle half of them earn between $29.90 and $57.29 an hour. About 4,740 work in the metro. That is 27.6 per 10,000 jobs, compared with 30.7 nationally, so the supply of crews looks typical.

Carpenters (47-2031), 10% of the weighting: a median of $34.08 an hour, 17% above the US median of $29.12. The middle half of them earn between $26.27 and $43.08 an hour. About 12,970 work in the metro. That is 75.5 per 10,000 jobs, compared with 43.1 nationally, which suggests plenty of 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 $340 to the midpoint estimate; the 25th percentile takes off about $160. That is a swing of roughly 3.8% to 8.3% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.

Riverside-San Bernardino-Ontario has 1,716,760 jobs in total (BLS, May 2025), ranking 16th by size among the 300 metros on this site.

What nearby projects cost in Riverside

Jobs that often go together with concrete slab are priced below at their usual sizes, using the same Riverside wage and price inputs. Compared with national midpoints, asphalt driveway comes out highest (+30%) and stamped concrete lowest (+8%); the gap comes from the trades each job uses.

Extras that change the Riverside total

Add-ons start from national price ranges and are scaled by 1.08 for Riverside, which is the average of the area's wage index (1.15) and goods price index (1.01). The estimator above can add them to your total.

Concrete slab: what moves the price in Riverside

• 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.

Is Riverside cheap or dear? The local comparison

Same job, same size (400 sq ft), priced for the nearest metros. San Diego is the priciest of the group at $4,350. Las Vegas is the cheapest at $3,850.

Out of the 300 metros we cover, Riverside ranks #45 for the cost of this job (#1 is the most expensive). Statewide, Riverside is 4% below the California figure.

Elsewhere in California

Metros of a similar size

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