Speculative Industrial Shell Buildings in Texas

Build it before the tenant shows up, and every decision becomes a bet. How deep is the slab, how many dock positions, how much power, how tall is the clear height, and what happens when the first lease asks for something you did not plan? A speculative industrial shell is tilt-up construction at its most disciplined, because the whole point is a box that suits as many users as possible at the lowest cost per square foot.

We pour the slab, cast panels on it, lift them in a day or two of good weather, and roof the shell. Then we stop. Tenant finish, racking, mezzanines and process equipment come later and belong to whoever signs. That clean stopping point is what makes the building fast. It also means the owner has to commit early to the choices that cannot be changed later: column spacing, dock count, truck court depth and the utility stubs.

Texas has the land and the freight to support this model, and the developers who work it want a builder who treats the shell as a product. We do.

Look at the way projects are laid out. In Katy, a Grand Parkway and Clay Road project began with a 433,300-square-foot building and was planned for five buildings ranging from 165,100 to 433,200 square feet across roughly 78 acres. On Highway 99, a 97,000-square-foot warehouse was designed so it could be divided into spaces as small as 9,500 square feet. One is a big box. The other is a building that tenants of any size can use.

West of San Antonio, the 164-acre Seguin Exchange Commerce Park is planned for more than 2 million square feet of industrial space in buildings from 30,000 SF to 1.3 million SF. In Eagle Pass, a 136,000-square-foot speculative warehouse was expected within months at a 1,761-acre park. In the Rio Grande Valley, one economic development corporation is working with developers on more than 600,000 square feet of speculative space. Those are the places we expect to be asked to bid. For site-specific notes, see Katy and Seguin.

Our approach starts with the dimensions the broker will quote: clear height, bay spacing, dock ratio, truck court depth, trailer parking, power and fire protection. We hold those fixed and work the cost out of everything else. Panel thickness is tuned to the height and the roof load. Embed plates are standardized so the same casting details carry across buildings in a park. Joists and deck are ordered once for the whole phase when the owner is building several buildings in a row.

A spec shell also has to survive the tenant. We leave knockouts where a future dock door or overhead door is likely, we size the slab for racking even when no racking has been drawn, and we run the underground utilities with space for a different layout. The building is a platform for someone else's operation. The service detail is on our spec shell tilt wall buildings page, and the park-scale version of this is on the page for multi-building business parks.

The permit for a spec shell is written for a shell. The city or county reviews the structure, the site, the fire access and the sprinkler design for a generic occupancy, and the owner returns later for the tenant finish permit. The statewide commercial building code in Texas is the International Building Code, subject to local amendments adopted by ordinance, so we confirm early which amendments the city has added. Energy compliance follows the State Energy Conservation Office's adopted edition of the IECC.

When the project is registered with the Texas Department of Licensing and Regulation, it is because the cost reaches $50,000 or more and the building has to meet the Texas Accessibility Standards. That includes the shell's parking, routes and public restrooms. Do not leave accessibility for the tenant to solve. The cost of an accessible route in the shell is far smaller than the cost of cutting one in later.

The cost of a spec shell is mostly the site. Clay that needs conditioning, detention that eats an acre, and a utility extension from a main that sits half a mile away can add more to the price than the building itself. The second driver is the roof and deck package, which moves with steel and insulation. The third is the timing: when a developer is building several buildings, the cost per building falls with repeat casting and repeat lifting.

We give owners a price per square foot with a short list of allowances for the site-specific unknowns, and we update it as the geotechnical report and the civil drawings land. If you are weighing a smaller building that can be divided, take a look at the flex office warehouse page, and if the end user is likely to be a plant, see manufacturing plant.

A shell schedule depends on a handful of trades that work in a fixed order. The grading crew leaves a pad within tolerance. The slab crew pours and cures. We cast and lift. The deck and roofing crews follow within a few weeks. If any one trade slips, everybody behind it waits, and the owner pays interest on a building that earns nothing.

That is why we manage site work, panel lifting and setting and the roof schedule under one contract where we can. It is also why we keep a close eye on long-lead procurement, because switchgear, dock equipment and fire pumps do not care how fast the walls went up. Developers who plan a series of buildings also ask us to help with industrial developer and REIT programs where pricing and design carry from one phase to the next.

Send the site, the building size and the delivery date. We will price the shell, flag the ground and utility risks, and show you how the schedule runs from pad to dried-in.

What should be fixed before we start a spec building?

Clear height, column grid, dock ratio, truck court depth and electrical service. Those drive the panels, slab and site, and they are the hardest to change. We recommend talking to a broker or two about what tenants in your submarket ask for before the drawings are final.

Can the shell be divided for several tenants?

Yes. Plan demising walls, separate utility rooms, separate dock positions and separate restrooms or at least stubs for them. It costs more than a single-tenant box, but the flexibility often leases the space faster.

How fast can a spec shell be built?

After permits, a typical shell takes several months from site mobilization to dried-in, depending on size, ground conditions and weather. Lifting is quick. Site work, curing and long-lead items are what set the finish date.

What do we leave out so tenants can customize?

Interior partitions, office build-out, racking, mezzanines, process utilities and most mechanical beyond a basic warehouse heating arrangement. We provide the structure, slab, roof, dock shell, fire protection and utility stubs.