Construction activity has begun on a large new industrial project in the West Valley as Willmeng Construction officially broke ground on GO|99 North, a 1.1 million-square-foot Class A warehouse and distribution center in Tolleson. The building is being developed as a speculative, or "spec," project intended to provide space for logistics, distribution and industrial users at a scale that local market sources say is in short supply across the Phoenix metro area.
The scale of the facility places it among the largest industrial projects in the region. At 1.1 million square feet, the building footprint is designed to accommodate the kinds of operations that require continuous floorspace for racking, sorting and staging freight, as well as the vehicular movement and loading activity associated with distribution functions. The developer has positioned the project as a response to what has been identified as a critical shortage of large-format logistics space in the market.
Speculative construction means the structure is being erected without an announced, pre-existing tenant signed to occupy the space at completion. Developers and builders pursue spec projects when there is perceived demand from occupiers who will lease or purchase space once it becomes available. Class A designation is commonly used in the industrial sector to indicate a building built to high quality standards, though specific tenant improvements, equipment and finishes are typically configured once a user is identified.
Large-format distribution buildings play a specific role in regional supply chains. They serve as hubs where freight is received, stored and prepared for onward shipping; they can support cross-docking, short-term storage and order fulfillment operations. The presence of additional megawarehouse capacity can alter the dynamics of where companies choose to stage inventory, move goods through the market and locate operations that rely on large contiguous floorplates.
Willmeng Construction's groundbreaking marks the start of onsite work that generally includes initial grading, utility coordination, foundation installation and the erection of primary structural elements. Subsequent phases commonly move through the building shell, roof systems, interior slab work and installation of dock infrastructure. The developer and construction manager will then typically proceed to complete exterior sitework and any tenant-specific outfitting once leases are secured or projects move into the next contractual phase.
The site in Tolleson sits within the West Valley submarket of the greater Phoenix metropolitan area. Market observers have for some time pointed to the importance of adding large-scale logistics space in growing metro regions, noting that the availability of contiguous blocks of industrial square footage is a limiting factor for some kinds of distribution and fulfillment operations. This project, billed as a megawarehouse, is part of that broader pattern of developers delivering substantial single-building footprints to meet occupier needs at scale.
An interior image associated with the project shows a wide column grid and a finished concrete floor inside the expanse that is part of the GO|99 North initiative, offering a sense of the open, continuous space that characterizes large distribution facilities. Interior view of the vast, 1.1 million-square-foot warehouse in Tolleson, showing the column grid and finished concrete floor — part of the GO|99 North megawarehouse project Willmeng Construction recently broke ground on to help address Phoenix's shortage of large-scale logistics space.
Officials and market participants have described the project as intended to help ease the shortage of large-scale logistics space in the Phoenix metro area, though timelines for completion, future tenancy and additional development details have not been disclosed publicly in connection with the groundbreaking announcement. As construction advances, observers will watch for updates on leasing activity and the extent to which this and other large-format projects change availability and options for occupiers seeking megasized industrial footprints in the region.
The project is being developed by GO Industrial, marking the firm's largest single-building effort and its second major project along 99th Avenue after GO|99 South—a 1.28 million-square-foot industrial park built by Willmeng that sold for $165 million in 2023. GO Industrial President Robert Guerena noted it addresses a shortage of million-square-foot-plus buildings in a key corridor, while Willmeng CEO James Murphy voiced excitement about partnering again; it was designed by DLR Group.
The site covers roughly 75 acres in Tolleson’s Estrella Park neighborhood and is being marketed for its location with direct, roughly three‑minute access to Interstate 10 and less than five miles to the Loop 202, according to local reporting. (AZ Big Media, Hoodline.)
Project specifications reported by trade outlets show the building will be built to 40‑foot clear heights and include 190 dock‑high doors, four grade‑level doors, all‑concrete 245‑foot truck courts, about 1,200 car parking spaces and 113 truck/trailer stalls. (REBusinessOnline, AZ Big Media.)
Additional construction and infrastructure details published with the announcement indicate a TPO 60‑mil roofing membrane with R‑38 insulation, clerestory windows for natural light, an air‑conditioning‑ready shell with 3,600 amps of expandable power, and a secured perimeter with seven rolling gates. (AZ Big Media.)