Tenants who cannot find flex space when they need it end up expanding in place, and in Westminster that usually means a tenant improvement or a building addition done while the business keeps operating. Westminster's 2024 economic profile reports 3,582,581 rentable square feet of industrial and flex space at a 2.4 percent vacancy rate (CoStar, September 2023). A figure that tight tells us that owners here are better served by reconfiguring and extending what they hold than by waiting for the right vacancy to appear, so much of our work in the city is built around industrial tenant improvements and phased additions.
The same profile counts 30 business parks and more than 18.7 million square feet of commercial space, which means most projects here are inside a park with covenants, shared drives and neighbors. We handle that by reading the park rules before design, planning construction access around the other tenants and agreeing on the working hours with the property manager.
The employer base includes Ball Corporation (headquarters and manufacturing), Maxar and Trimble, so the technical demands we see are electrical capacity, clean and quiet space, and controlled environments inside ordinary shell buildings.
Who we build for inside the business parks
The city's largest primary employers are Ball Corporation with 1,335 employees, St. Anthony's North Hospital with 1,153, Maxar with 954 and Trimble with 850, according to the 2024 profile. Smaller companies in the supply chain of such employers, along with distribution and service firms, fill the business parks. We support advanced manufacturing tenants who need heavier power, compressed air, floor loading and ventilation, and ecommerce fulfillment tenants who need racking-ready floors, dock doors and fast build-out.
Each of those groups has a different definition of done. For the first it is the commissioning report on the equipment; for the second it is the first truck backed to a door. We write the definition into the schedule and the closeout so both are measured.
Building out space while the neighbors keep working
In a multi-tenant park, schedule risk comes from shared systems and shared access more than from the construction itself. We coordinate fire-line shutdowns, utility tie-ins and dock access with the property manager, give neighbors written notice of loud or disruptive work, and schedule deliveries so trailers do not block other tenants' doors. Where an addition is attached to an occupied building, we separate the work area with temporary partitions and dust control, and we phase demolition to limit the time the tenant is exposed.
Long-lead items such as rooftop units, switchgear and overhead doors are ordered at approval, not at construction start. Our long-lead procurement management tracks each item from submittal to delivery on a single log, so a late gear order is seen weeks before it affects a milestone. Haul planning uses the roads the city actually has: I-25, U.S. 36, U.S. 287 and State Highways 95, 121 and 128 serve Westminster, and the Flatiron Flyer runs in the U.S. 36 express lanes, so we avoid scheduling oversize deliveries into the peak commute windows.
Scopes we build in flex and light industrial space
Typical scopes include new or reconfigured office, dock-door additions, slab saw-cutting for floor drains and equipment pits, mezzanines, upgraded electrical service and demising walls for a multi-tenant split. We also build flex light industrial buildings on available pads, with front-office and rear-warehouse layouts sized to the tenant market.
Before any cutting or core drilling, we locate post-tension cables, utilities and existing reinforcing with scanning, and we verify structural capacity for new rack, equipment and mezzanine loads. Most of the risk in a tenant improvement is in what is hidden in the existing building, so we sort those unknowns in preconstruction and carry a defined allowance for what cannot be known until demolition.
The 2021 IBC and what it means for permits
Section 11-9-1(b)(1) of the Westminster municipal code adopts the International Building Code, 2021 Edition, Chapters 2 through 35, as the city's building code. We confirm the current amendments and any later adoption with the building division before submitting, but the 2021 edition gives us the working basis for occupancy classification, egress, fire separation and structural design on a Westminster set.
State energy law under HB22-1362 also applies when a city updates its codes, so we keep the energy and electrical design current with what the building division is reviewing. For a change of use, such as converting storage space to light assembly, we check the occupancy classification and sprinkler design early because those items change the fire-protection scope and the cost.
Where cost sits in a tight flex market
When vacancy is low, the cost of waiting often outweighs the cost of construction. We therefore show owners the price of speed explicitly: the cost of early procurement, extra shifts, and prefabricated elements, compared with the cost of a standard sequence. The line items that most often drive cost are electrical service upgrades, fire sprinkler modifications, slab work for drains and equipment, and the structural reinforcement required for mezzanine or rack loads.
Sites in Broomfield or Thornton may be considered alongside Westminster, and the same cost categories apply there; what changes is the building stock, the park rules and the permit path. Our estimates are structured so those variables can be compared line by line.
Send the lease and the floor plan
Send the lease, the existing floor plan and your required occupancy date. We will return a scope, an allowance schedule and a procurement plan that shows what can be ordered before permit approval.
Common Questions
How tight is the industrial and flex market in Westminster?
The city's 2024 economic profile reports 3,582,581 rentable square feet of industrial and flex space at a 2.4 percent vacancy rate, citing CoStar data from September 2023. That is a dated figure, so we treat it as an indicator and not a forecast. In practice, it means expansions and reconfigurations are often the realistic path.
Which building code does Westminster use?
The municipal code adopts the International Building Code, 2021 Edition, Chapters 2 through 35. We still confirm any later adoption and local amendments with the building division before submitting a permit set.
Can you build out space in an occupied business park?
Yes. We coordinate with the property manager on utility shutdowns, dock access and working hours, set temporary partitions and dust control, and notify neighbors before any disruptive work. Deliveries are scheduled so trailers do not block other tenants.
What hidden conditions affect tenant improvements the most?
Post-tension cables, concealed utilities, unrecorded slab penetrations and limited electrical capacity. We scan before cutting, verify structural capacity for new loads and carry a defined allowance for unknowns revealed during demolition.
How do you handle a tenant that needs more electrical capacity than the building has?
We start with a load letter and the serving utility's requirements, then size the new service, gear and conduit routes against the existing panel room and yard. Utility lead times are often the longest item on the schedule, so we submit the service request as soon as the load is known and order switchgear on approval. The turnover package includes one-line diagrams, test reports and the labeling schedule.