E-Commerce Fulfillment Center Construction in Denver

Multi-level fulfillment buildings have already arrived in Adams County. Amazon announced in June 2017 an 855,000 square foot, three-level fulfillment center near I-25 and 144th Avenue in Thornton, about 2.4 million square feet of floor area with 1,500 full-time positions. That project showed the Denver metro that a fulfillment operator can stack inventory, conveyors and people on several floors when land near the labor pool is scarce. We build both the stacked and the single-level versions for retailers, marketplace sellers and logistics providers.

Fulfillment buildings are judged by how fast a unit leaves the dock, and that depends on the building as much as the software. Slab flatness lets narrow-aisle trucks and autonomous vehicles run without recalibrating. Column grid and clear height set the pick module and conveyor layout. Floor loads, mezzanine capacity and sprinkler design determine how many shelves and sortation levels the operator can add. We read your automation vendor's drawings before we finalize structure and slab, not after.

The labor market is also a site factor. North-metro buildings draw workers from Thornton, Northglenn and Westminster, and the RTD N Line commuter rail, which opened September 21, 2020 with three Thornton stations, gives some shifts a transit option. We help owners weigh those labor and commuting questions alongside dock count and truck access when they choose a site.

Designing around the automation vendor

We treat the automation supplier as a design partner from the first meeting. The integrator's layout tells us where conveyors cross the slab, where mezzanine columns land, which areas need extra power and data, and how much floor space the robotics need. Those requirements drive the structural bay layout, the electrical rough-in and the fire protection design, so we resolve them before drawings are priced.

Where an operator has not yet chosen a vendor, we design for flexibility: a slab flat enough for several systems, a column grid that adapts, and utility stubs that can be extended. That approach costs a little more up front and usually saves a great deal when the system selection changes. Our broader logistics and distribution work gives us a baseline for those trade-offs.

Slab, structure, docks and mezzanines

A typical project includes site work and stormwater, tilt-up or steel structure, a super-flat slab, a high-volume fire protection system and a large electrical service, plus the dock equipment and truck court. Fulfillment buildings often carry a second or third level of platforms for pick modules. Our mezzanines, catwalks and platforms work covers the structural design coordination, the fire code implications and the stair and egress layout that those platforms need.

Last-mile operators need different dock arrangements from regional centers: more van bays, shorter turns and sometimes a separate employee entrance. A larger parcel allows both truck and van areas. We design aprons to match, as described in our notes on dock aprons and loading zones, and plan the pavement sections for the loads each lane will actually see.

Hitting a peak-season opening

Fulfillment openings are tied to peak seasons, so the calendar often has a hard date. We back-schedule from the day product arrives: racking and automation install, then inspections, then building completion, and finally site work and structure. Weather, particularly the roughly 49 to 54 inches of snow Denver gets in a year, is built into the plan with winter protection options and float in the foundation phase.

Early procurement of electrical gear, dock levelers and fire pump equipment keeps long-lead items off the critical path. We release the structural package as soon as it is ready and let the slab and structure start while interior and automation design continues. A tight weekly look-ahead with the integrator makes sure space is ready before the equipment crew arrives.

What drives fulfillment center costs

Slab flatness, power and fire protection do most of the damage. A super-flat floor needs laser screeds, controlled pours and careful curing, and it costs more than a standard warehouse floor. Large electrical service and a robust data backbone add to the base building. High-piled storage and mezzanines demand more sprinkler density and sometimes a larger fire pump and water supply.

Site cost is next: grading, detention and utility extensions on a large parcel can be a major line. We help owners compare sites on total installed cost, not land price alone. An E-470 interchange such as the one at Quebec Street in Thornton, which opened November 24, 2014, or the Exit 22 interchange that serves Aurora Highlands, can make a parcel more valuable even when the acquisition price is higher.

Building types and sites that support fulfillment

The core building type is the logistics fulfillment center, but many operators also need cross-dock space, returns processing or a small cold room for grocery and pharmacy orders. Operators serving pharmaceutical and life sciences customers add temperature-controlled areas and security zones to the base design.

Northglenn, which covers 7.44 square miles in Adams and Weld counties and is served by I-25, State Highways 7 and 128 and E-470, is one of several north-metro cities where fulfillment operators look for sites. Our work in Northglenn and neighboring cities includes the permit review, utility coordination and traffic planning that large buildings require.

Share the automation layout

Send your vendor layout, target opening date and candidate sites. We will give you a buildability review and a budget range for a fulfillment center in the Denver metro.

Common Questions

Is a multi-level fulfillment building worth the extra cost?

It depends on land price and labor availability. Stacking floors reduces the footprint and keeps buildings near the workforce, but it requires heavier structure, vertical conveyance and more complex fire and egress design. A single-level building is cheaper to build and simpler to operate. We price both options on your parcel and show cost per unit of throughput, so the decision does not rest on first cost alone.

How flat does the floor need to be for autonomous vehicles?

Requirements come from the equipment manufacturer and are usually stricter than for a conventional warehouse. We take the specified flatness and levelness targets, plan the pour sequence and screed method to achieve them, and test the slab as it is placed. Slabs that miss targets can be ground, but it is far cheaper to place them correctly the first time.

Can you phase a fulfillment center so one part opens early?

Yes. Many operators open one section while another is under construction, which means separating construction traffic and utilities from the operating space. We plan fire separations, temporary power and security so the open section can operate legally and safely, and we set up the schedule so the later phase does not disrupt the first.

How much parking and van staging does a large fulfillment building need?

Shift size drives parking and delivery routes drive van staging, so there is no standard ratio. Local zoning sets minimums, but operators often need more than the code requires. We use your staffing model and delivery plan to size the lot, then confirm it against the planning requirements for the city.

What utilities should we confirm before buying land?

Power, water for fire protection, sanitary sewer and stormwater outlet. The fire flow requirement for high-piled storage can be higher than a nearby main can supply, and electric service for conveyors and charging may require a new line extension. We check each with the provider before closing so surprises do not surface after the purchase.

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