Concrete contractors in New Castle County, Delaware

What these Delaware records tell you

These selected Delaware registrations showed Active status and NAICS 238110, Poured Concrete Foundation and Structure Contractors. The activity code is not a concrete trade certification or a workmanship rating. Included records permit private work, either alone or together with public work; public-only registrations are excluded. Read the work category on each profile, confirm the current registration and check any other license or local permission your project needs.

Check each business with Delaware Department of Labor's official registration search. A listing is not a workmanship rating, a verified customer review or confirmation that the business participates in our referral service. We do not independently verify insurance; request current documentation directly.

Where the listed businesses are based

Business locations represented on this page: Wilmington, New Castle, Newark, Bear, Townsend, Hockessin, Claymont, Newport, Middletown. County, parish, borough, census-area, planning-region and independent-city assignments use the largest Census land overlap for each business ZIP. ZIP centers are approximate; they are not exact business addresses or driving distances.

Census geography

Concrete conditions in New Castle County

Averages from the nearest NOAA climate normals station, Wilmington New Castle Co AP, DE (7.1 miles away, 79 ft), over 1991–2020.^[1] Conditions can change over short distances, especially with elevation, so treat these as a planning guide, not a forecast.

Nights at 32°F or below

92

Days at 90°F or above

22

Precipitation a year

45 in

Snowfall a year

20 in

Cold and freeze-thaw

Freeze-thaw is the main risk for outdoor concrete in New Castle County. Concrete that is wet when it freezes, especially where deicers are used, can scale. NRMCA recommends air-entrained concrete, about 6 percent total air with ¾- to 1-inch aggregate, and a specified strength of 4,000 psi for exterior slabs exposed to freezing and deicers. Ask every bidder to write the specified strength and air content into the quote. Freezing lows are not only a midwinter issue here: about 27 of them fall in March–May and September–November, so spring and fall pours need a plan for cold nights too. ACI calls for cold-weather precautions when air temperatures are expected to fall below 40°F during the protection period.^{[2, 3]}

Heat and drying

Summer brings about 22 days at 90°F or hotter. High temperatures speed up setting and drying, which raises the risk of plastic shrinkage cracks. For a summer pour, ask the contractor to schedule outside the hottest part of the day and to explain how the slab will be protected from drying too fast.^[4]

With 45 inches of precipitation a year, ask how fresh concrete will be covered if rain arrives during or soon after the pour, and how the finished slab will shed water away from the house. About 20 inches of snow a year means plowing and deicers on driveways. NRMCA notes that deicing chemicals make scaling worse, especially on new concrete.^[2]

Homes in New Castle County

New Castle County has about 236,079 homes. The median home was built in 1975; 67% were built before 1980 and 9% since 2010. 69% are owner-occupied and 53% are single-family detached houses. With so many older homes, a driveway or patio job often starts with an existing slab. Ask whether the quote includes removal, haul-away and repair of the base underneath.^[5] This directory lists 58 businesses based in the county, about 2.5 per 10,000 homes.

Planning guides: pouring in cold weather · curing times · driveway thickness

1. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020 (annual and seasonal, by station) (archive c20230404; imported October 30, 2026), station USW00013781.
2. National Ready Mixed Concrete Association, CIP 2: Scaling Concrete Surfaces (checked October 30, 2026).
3. American Concrete Institute, ACI 306R-16: Guide to Cold Weather Concreting (preview) (2016 edition; checked October 6, 2026).
4. National Ready Mixed Concrete Association, CIP 12: Hot Weather Concreting (checked October 30, 2026).
5. U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25003, B25024, B25034, B25035) (imported October 30, 2026).

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