Warehouse Shell Construction in the Denver Metro

Speculative warehouse shells are bought on schedule and square footage, in that order, and the contractor who hands over a dried-in building first often wins the tenant. We build warehouse shells across the Denver metro for developers and owner-users: site work, foundations, slab, wall structure, roof, dock positions, utility stubs and the code-required life safety systems that let a tenant move in and finish the interior.

A shell is a defined scope, but the definition varies. For some owners it ends at a clean slab, an enclosed envelope, a roof, dock doors and a sprinkler main. For others it includes the sprinkler system, lighting, restrooms and an office core. We help owners set the boundary early, because the line between shell and tenant improvement is where most disputes begin.

Our goal is a building that is dry, safe, inspected and flexible enough that a tenant can rack it, light it and cool it without tearing out what we built.

Decisions That Define the Shell

Clear height, column spacing, dock count and truck court depth are what separate a shell the market wants from one that sits empty. Users now expect high clear heights, wide bays, deep truck courts and ample trailer positions, and each of those choices changes the structure, the slab and the site. We price the options in preconstruction so the developer sees the cost of an extra foot of height or a wider column bay before committing.

Expandability matters too. Shells are often built with future demising walls, knock-out panels for added dock doors and electrical rooms sized for tenant loads. A small amount of planning at this stage saves a tenant from cutting into a new wall or slab later. We also check the roof for solar-ready and rooftop-unit loading, since a tenant that adds heavy mechanical equipment in year three should not discover a roof that was framed only for the minimum.

Where Shell Demand Is Moving

The airport corridor keeps pulling warehouse development eastward. Aurora Highlands, a roughly 4,000-acre development southeast of Denver International Airport, gained a full E-470 interchange at Exit 22 for $87 million that opened June 28, 2024. Commerce City is directly adjacent to the airport and, according to the city's own economic development campaign, sits where three major interstates meet.

For developers, that translates into land with truck access, sites with rail where available and a pool of tenants who want proximity to DEN. For us, it means shell projects arrive in waves, with several buildings on one site and a premium on repeating details across buildings so the second and third go faster than the first. Because energy code requirements in Colorado are tied to each jurisdiction's adoption date, we also confirm insulation and lighting-power targets for the envelope on each building, so a later building in the same park is not designed to a different set of rules.

Code Editions Vary by Jurisdiction

Commerce City adopts the 2021 International Building Code as the City of Commerce City Construction Code, with 49 local amendments, and the Home Builders Association of Metro Denver tracker of January 20, 2026 lists the city as having no plans to adopt the 2024 I-codes, with an update expected in the 2027 cycle. A shell permitted a few miles away under a different jurisdiction may be reviewed under a different edition.

We confirm the code edition, local amendments, fire flow requirements and sprinkler design criteria before pricing. Shells with high-piled storage face specific fire protection design questions: the rack storage the tenant plans can change sprinkler density and hose demand, so we review the intended commodity and storage height with the fire protection engineer and the fire department before the shell's system is sized.

Shell Scope, Item by Item

Site preparation, utilities and paving come first, followed by foundations and the slab on grade. The wall structure is tilt-wall, steel and panel, or precast, depending on height, program and budget. The roof system, typically a steel joist and deck frame with insulation and membrane, is installed with penetrations for drains, smoke vents and tenant mechanical units.

We install dock pits and door frames or provide knock-outs, set bollards and dock bumpers, and run utility stubs into the building: water, sewer, power, fire service and data conduits. Truck courts, trailer parking and landscaping follow, with stormwater features built per the approved plan. Final cleaning, punch list and inspections bring the shell to certificate-of-occupancy readiness for the core and shell.

Tenants the Shell Has to Serve

Shell design should reflect the likely tenant. Ecommerce fulfillment users want clear height, large truck courts and mezzanine space, while logistics and distribution tenants prioritize dock counts and cross-dock layouts. We keep dock-door spacing, slab flatness and sprinkler design flexible enough that either can move in.

These shells are covered in more detail under the warehouse buildings and distribution center building types, and the same discipline applies to both.

We build them with tilt-wall industrial buildings methods where the program fits, and the finished core hands off to industrial tenant improvements for racking power, offices and lighting.

As buildings grow, owners come back for distribution center expansions. For sites near the airport, the Commerce City market is where many of these shells appear first, with a mix of single buildings and multi-building parks.

Define the Shell Before the Tenant Does

Tell us the clear height, dock count and site constraints you are targeting. We will price the shell, set the line with tenant improvements and give you a delivery date to market.

Common Questions

How long does it take to build a speculative warehouse shell?

For a large single-story shell, plan on the better part of a year from permit to certificate of occupancy for the core and shell, with more time for multi-building parks, heavy site work or long-lead items such as joists, doors and the fire service. We establish the schedule backward from the tenant delivery date and identify which items drive it.

What should be in the shell and what in tenant improvements?

The split is negotiated. A common approach is for the shell to include structure, envelope, roof, slab, dock doors or knock-outs, base sprinkler main, basic power and restrooms, while racking, additional lighting, offices, conveyor and refrigeration are tenant scopes. Writing the split down at contract stage prevents disputes later.

How do the codes affect a shell design?

Occupancy classification, fire area limits, sprinkler design and egress are all driven by the adopted code, and Colorado does not use one statewide commercial code, so each jurisdiction can differ. We design to the edition and amendments in the permit jurisdiction and coordinate early with the building and fire reviewers.

Can you build multiple shells on one site at the same time?

Yes. Multi-building parks benefit from shared sitework, repeated details and a rolling schedule where one building's slab pour follows another's lift. We stage cranes, concrete and crews so they move smoothly from building to building and the project reaches completion on a drumbeat.

What affects the cost of a shell most?

Clear height, floor loading and flatness, wall system, site conditions and the sprinkler design. Land that needs extensive grading, drainage, or soil improvement adds to the site portion of the cost. We break out these categories in our estimates so owners can see where value engineering will matter.

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