Concrete and Site Work for Homebuilders and Multifamily Developers

Bar Nunn grew about 35 percent in ten years, from 2,213 residents in 2010 to 2,981 in 2020. Mills went from 3,461 to 4,034, and Evansville from 2,544 to 2,746. For a homebuilder or a multifamily developer, those numbers mean lots, streets, water, sewer and storm drainage have to arrive before the framers do. We build the ground side of residential development: the grading, utility mains, curb, sidewalks and the footings and slabs that hold the houses and apartment buildings up.

Housing developers work on thin margins and long carrying costs, so a late foundation hurts more than a high unit price. We write bids around the three things that cause delay in this metro: frost, soft ground and inspection timing. We tell you what they cost, plan the sequence around them and keep the foundation crew ready to start the day the lot is released. This is production work, not custom, and we treat it that way.

Where Casper area growth is landing

The three towns around Casper have all added residents, and each handles growth differently. Mills lists a Building and Inspections office, a Planning and Zoning office and a Public Works department that includes a water treatment facility, so a subdivision there deals with the town directly. Evansville, at 5,125 feet elevation, is part of the Casper metropolitan statistical area and sits along the highway to the east.

Bar Nunn has a particular history. It was built around the runways of Wardwell Field, Casper's original airport, and the old runways now form the town's street pattern. When a street grid started life as an airfield, we ask what is under it before we trench: old pavement, thick base, buried conduit. The answer changes the excavation method and the haul-off.

Residential design criteria and the permit counter

The City of Casper's engineering and climatic criteria for one and two family dwellings list climate zone 6B, a 115 mph three-second gust wind speed at exposure C, seismic design category B, a three foot frost line to the top of the footing, a 3,000 air freezing index and severe weathering. Snow load is read from the 2024 International Building Code table and the ASCE Hazard Tool instead of a fixed number. We build footings and stem walls to those criteria and to the engineer's drawings.

Wyoming leaves building codes to local adoption, so a lot in Casper, one in Mills and one in Bar Nunn can have different review paths. Ask the local building office for the current adopted editions before you sign off a plan set. The construction trade partners keep copies of the footing and foundation inspection requirements on site so a hold at the inspector's visit does not cost a day.

Streets, mains and foundations

Subdivision work starts with clearing, mass grading and a street subgrade that can carry construction traffic. Then comes water main and sewer main, storm drains, curb and gutter and sidewalks. See land development infrastructure for the full sequence we follow, and mass grading for the earthwork that comes first.

Buildings come second. For houses, that is a footing, a stem wall or foundation wall, and a slab or crawlspace; for apartments, deeper footings, grade beams and larger slabs. We pour footings and stem walls below the frost line and keep trenches dry and free of loose soil before placing concrete. For multifamily projects, the multifamily and mixed-use page covers podium slabs and ground-floor retail.

What moves residential site cost

The per-lot cost is made up of the street and utility share, the lot grading and the foundation. Street and utility cost per lot depends on frontage: wide lots cost more. Foundations depend on depth and soil, and when soil is weak the answer is over-excavation and replacement with compacted structural fill, which adds both dirt and time.

Winter is the other large factor. A foundation crew can run in cold weather with blankets and heated water, but at a cost per yard that a production builder notices. We list winter methods as a separate line so you can decide whether to start in January or wait for April. Apartment developers who have tax credits or fixed draws often choose to pay for protection.

Where we build for residential owners

We work in Casper and in the neighboring towns of Mills, Evansville and Bar Nunn, plus the Glenrock and Douglas corridor to the east along I-25. Each town has different utility connection rules, inspection timing and fees. Read more about local conditions at Bar Nunn and Mills.

Most of our residential work sits near other development, which lets us share mobilization. If a school or public improvement is planned in the same area, the road and utility work often overlaps. Our school and healthcare page discusses how we coordinate with those owners.

Public streets and private lots

A developer's subdivision plat turns into streets the town accepts. Public acceptance depends on utility testing, compaction results and street sections that meet the town's standards, which is why municipal and public works owners matter to residential developers. We keep the same testing and documentation habits on private work so acceptance goes smoothly.

When a project includes a clubhouse, leasing office or retail pad, the commercial side shows up. We coordinate those pieces with the street and utility work, and use the same crew to avoid duplicate mobilizations.

Send the plat and the lot schedule

Give us the plat, the geotechnical report and the order in which lots will be released. We will return a street and foundation sequence with winter costs listed separately.

Questions Owners Ask

How deep do footings go in the Casper area?

Casper's criteria call for a three foot frost line to the top of the footing for one and two family dwellings. Other towns set their own depth, and the engineer's drawing governs. We never set a footing shallower than the drawing and we check depth before the inspector arrives.

Can you pour foundations in January?

Yes, with protection. That means heated enclosures or insulated blankets, warm mix water, accelerated cure and temperature monitoring until the concrete reaches strength. It costs more than a July pour, and we price it as a separate line so you can decide.

What do you need from us for a subdivision bid?

The plat, the grading and utility plans, the geotechnical report, the street sections and the town's standards. We also want your schedule for lot releases, because phasing affects how we group trenching, paving and foundation work.

How should we phase a multifamily site against the pour season?

Start with the utility mains and building pads in summer and early fall, and get the footings and ground-level slabs in before sustained freezing. Upper floors and framing can proceed through winter while the foundations are protected. We map the phases against your draw schedule so concrete cost and financing line up.

How do you handle weak soil under lots?

We follow the geotechnical engineer's recommendations. That may mean over-excavating and recompacting, placing engineered fill or adjusting footing width. We test density in lifts and keep records for the building inspector.

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