Updated September 29, 2026. Costco's planned Port St. Lucie warehouse has a site in Southern Grove, west of I-95. The city announced a land-sale agreement in March, and the City Council approved a zoning amendment for large membership warehouses on July 27. Costco has not announced an opening date.
One detail has changed in the paperwork: the city's March announcement described a roughly 170,000-square-foot store and gas station, while July council materials refer to a submitted site plan for a proposed 158,000-square-foot warehouse. Treat both as planning figures until an approved site plan settles the design.
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Quick list
What is confirmed
- The proposed store is east of SW Village Parkway near SW Marshall Parkway
- The city agreed to sell Costco roughly 22.8 acres for $6 million in March 2026
- City Council passed a zoning amendment allowing large membership warehouses in the district on July 27
- The city cited a submitted site plan in July; an opening date has not been announced
Where the store is planned
The retail parcel is in Southern Grove, near Costco's separate distribution depot. The city's March announcement places it east of SW Village Parkway and south of SW Marshall Parkway. The depot and retail warehouse are different projects, so progress on one does not establish an opening date for the other.
What happened after the land announcement
On July 27, City Council passed Ordinance 26-67, amending the Legacy Park North zoning rules to allow a membership wholesale store of at least 100,000 square feet in the mixed commercial area. Council materials also say a site plan application had been submitted for a proposed 158,000-square-foot Costco. A submitted plan is a step in review, not an announced construction or opening schedule.
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When will it open?
Neither the city's project announcement nor its July ordinance gives a construction start or grand-opening date. Costco's new-locations page is the best place to watch for a company announcement. If you see a specific opening month elsewhere, check whether it comes from Costco or the city before planning around it.
The next useful update
Watch the city project record for site-plan action and Costco's own location announcements. Those are more useful milestones than a speculative countdown. Residents can use the existing Stuart warehouse in the meantime.
FAQ
Common questions
Is the Port St. Lucie Costco approved?
The city announced a land-sale agreement and passed a zoning amendment for a large membership warehouse. The July council record says a site plan had been submitted; check the city record for the plan's final status.
Where is the proposed Costco?
In Southern Grove, east of SW Village Parkway near SW Marshall Parkway, west of I-95.
Does it have an opening date?
Costco and the city have not announced a grand-opening date as of September 29, 2026.
Sources
Reference links
Written by
Derek Brumby
We publish Treasure Coast guides for residents, newcomers, and weekend planners. Our goal is to combine local context, linked source material, and ongoing page updates so a reader can act on the guide instead of just skim it.
Derek Brumby is the sole author and editor. On The Treasure Coast is owned and published by Brumby LLC.
Research and updates
Last verified September 29, 2026
This guide was written and edited by Derek Brumby using linked local and official sources, then reviewed for Treasure Coast planning context.