Fontana clears construction docs for a 398,514 SF warehouse as IE vacancy climbs
A 398,514-square-foot warehouse cleared into building plan check in northern Fontana this spring, the step where an approved project becomes construction-ready drawings. The developer is Seefried Industrial Properties, a national industrial builder. Fontana approved the project — the Sierra Distribution Facility — on June 3, 2025, following a full environmental review, so the plan-check filing marks roughly a year of movement from entitlement toward a shovel.
The building would rise on 18.3 acres at Sierra Avenue and Clubhouse Drive, with about 10,000 square feet of office and 54 dock-high doors. It consolidates six parcels into one and vacates a stretch of Windflower Avenue into the site. Four small industrial users now occupy the ground — a pallet yard, a carnival-ride repair shop, and two trailer-storage and storage operations — all of which the project would replace with a single large box.
The timing is what makes it worth an operator's attention. IE industrial vacancy has been climbing: CBRE put the IE Core at 7.8% in the first quarter of 2026, up 70 basis points in three months as several tenants gave back space in the 500,000-square-foot range. Other brokerages tracking the region read vacancy higher still. All of them sit well above the roughly 4% the IE averaged over the past decade.
Against that backdrop, new construction has mostly frozen. CBRE's 2026 outlook expects speculative development to stay minimal this year, caught between an oversupply of empty first-generation space and hard-to-get construction financing. The exception it names is build-to-suit — buildings put up for a committed tenant with specialized needs, which still pencil when spec does not.
Which raises the open question on Sierra Distribution Facility: whether Seefried is building it on spec, betting a new Class A box leases in a soft market, or building it to suit for a tenant already signed. The public record doesn't say, and Seefried builds both ways. That answer determines whether this is one developer's wager against the vacancy trend or a sign that committed demand is still pulling specific product out of the ground while the broader pipeline waits. For brokers and owners watching absorption in West Fontana, it's the number to chase.