Costco Port St. Lucie: What We Know About Location, Timing, and Local Buzz

The proposed retail Costco site is in Southern Grove, the fast-growing district west of Interstate 95. The city says the store would sit east of SW Village Parkway and south of the newly constructed SW Marshall Parkway.

That places it in the broader Tradition and Southern Grove growth corridor rather than on an isolated parcel. In practical terms, this is exactly the part of Port St. Lucie where large-format retail, logistics, and new infrastructure are already being pushed forward together.

The geography matters because Southern Grove is not just spare land waiting for a tenant. The city describes it as a 3,605-acre employment and mixed-use district built around logistics, research, industry, retail, and housing, with direct I-95 access and long-range job growth built into the area plan.

The strongest signal that this is more than a speculative proposal is Costco's existing industrial footprint nearby. Before the retail-store announcement, the company had already committed to a major Port St. Lucie distribution operation in the same district.

City materials describe that depot project as roughly 1.87 million square feet of cold and dry storage, with first-phase activity expected in March 2026 and more than 500 jobs tied to the broader operation. That means Costco is not approaching Port St. Lucie as a brand-testing retail experiment. It is already building major infrastructure in the same part of the city.

For readers trying to separate hype from substance, that nearby depot is probably the single best reason the retail-store story deserves to be treated as real.

The clearest read on timing right now is that the land deal is approved, but the project is still in the pre-construction phase from a public-information standpoint. The city's March 9 announcement says start and completion dates are still forthcoming.

Local coverage adds one useful practical clue: a key roadway serving the site was expected to be finished by the end of March 2026, and Costco's typical development timeline is said to be about 130 days once vertical construction begins. That is a milestone to watch, but it is not the same thing as an announced opening commitment.

There is also a useful negative signal from Costco's own channels. As of March 13, 2026, Port St. Lucie does not appear on Costco's official New Locations page. That does not rule out a 2026 opening, but it does suggest the store is not yet in Costco's publicly advertised short-term launch window.

That last point is an inference from Costco's public site and process, not a city-announced schedule. It is still the cleanest way to describe where the project stands today.

This project has obvious emotional pull because it answers a request locals have been making for years. The city itself described Costco as one of residents' most-requested retailers, and local reporting says the March 9 agenda item spread quickly across social media once it became public.

There is also a simple shopping-geography reason the story is hot. Many Treasure Coast shoppers already use Costco's Stuart warehouse as the nearest current option. A Port St. Lucie location would not just add another major retailer. It would shorten the trip for a large group of residents who currently leave the city for the brand.

Several important details remain unannounced. The city has not published a formal construction start date, completion date, or grand-opening date, and its public description of the project is still mostly limited to the site, land deal, warehouse size, and gas station component.

That means readers should separate confirmation from countdown. The project is clearly real, the location is pinned down, and infrastructure work around the site is advancing. But the opening timeline is still missing from the public record.

Port St. Lucie is no longer wondering whether Costco is interested. The city-approved land deal shows the project is real, the site is known, and Southern Grove is the exact kind of district where this scale of warehouse retail makes strategic sense.

But the smartest headline is still a careful one: Costco is coming to Port St. Lucie, yet the opening date is still the missing piece. For now, the project is official, not scheduled.