Concept image for the planned Southern Grove project; final design and timing may change.
TL;DR: Southern Grove Costco Update
- Opening target: 2027; no exact opening date has been announced.
- Location: Approximately 22.8 acres near SW Village Parkway and SW Marshall Parkway, adjacent to Costco's distribution depot.
- Size: Public plans have been described as roughly 158,000 to 170,000 square feet.
- Planned: A membership warehouse and gas station.
- Zoning allows: A tire center, liquor sales, and outdoor seasonal merchandise.
Bottom line: The project could add a convenient shopping option for Tradition, Southern Grove, and nearby 34987 residents, but the timeline and final design remain subject to change.
Project summary as of October 6, 2026. Plans and timing may change.
Short answer: Costco is planning a new membership warehouse in Southern Grove near ZIP code 34987, but the latest reported target is 2027—not later in 2026. As of October 6, 2026, the project is still moving through approvals and pre-construction steps, so an exact opening date has not been announced.
For homeowners in Tradition and Southern Grove—and buyers considering a move to southwest Port St. Lucie—the proposal adds another major shopping option to an area that continues to grow. Here is what is confirmed, what remains preliminary, and what the location could mean for everyday convenience.
Costco in Southern Grove: Key Facts at a Glance
- Latest opening target: 2027, subject to final approvals, closing, construction, and change.
- Location: Near SW Village Parkway and SW Marshall Parkway in Southern Grove, in the southeast quadrant of that intersection.
- Site: Approximately 22.8 acres.
- Nearby landmark: Adjacent to Costco's distribution depot.
- Warehouse size: Public descriptions have ranged from roughly 158,000 to 170,000 square feet as plans have advanced.
- Included in current plans: A fuel station.
- Allowed under the zoning framework: A tire center, liquor sales, and outdoor temporary or seasonal merchandise displays.
When Is the Port St. Lucie Costco Expected to Open?
The most recent public reporting points to a 2027 opening target. At a July 2026 City Council meeting, a planner representing Costco said the company anticipated opening in 2027 and described a construction cycle of roughly 10 to 12 months after approvals are complete and the property transaction closes.
That is a target, not a guaranteed grand-opening date. Construction had not yet begun at the time of the July update, and the project still required additional steps. Buyers and residents should treat any more specific month or season as tentative unless Costco or the City of Port St. Lucie announces it officially.
Where Will the New Costco Be Located?
The proposed warehouse site is about 22.8 acres in Southern Grove, near SW Village Parkway and SW Marshall Parkway. City materials place it east of Village Parkway and south of Marshall Parkway, next to Costco's distribution depot.
This puts the store in the broader Tradition and Southern Grove growth area of southwest Port St. Lucie, close to ZIP code 34987. For relocation buyers comparing newer communities in and around Tradition, the location is relevant because it would add a major retail destination on the west side of the city rather than requiring every Costco trip to begin with a longer drive.
How Large Is the Planned Warehouse?
Public descriptions have used two figures. The City of Port St. Lucie announced a proposed 170,000-square-foot store and gas station in March 2026. Reporting on the July zoning action described the current proposal as approximately 158,000 square feet.
The most accurate way to read those numbers is that plans are still being refined. The project is best described as a roughly 158,000-to-170,000-square-foot membership warehouse until final plans establish a definitive size.
What Features Are Planned or Allowed?
A gas station has consistently been included in public project descriptions. The zoning amendment approved in July also allows features commonly associated with Costco operations, including:
- a tire sales and service center;
- liquor sales;
- outdoor temporary or seasonal merchandise displays; and
- a fuel facility.
A zoning allowance means a use is permitted; it does not guarantee that every allowed feature will appear in the final build. Final site plans and Costco's own opening announcements will be the best sources for the finished amenity list.
What the Costco Plan Means for 34987 Homeowners and Buyers
Another everyday shopping option
For many households in Tradition, Southern Grove, Riverland, and nearby 34987 communities, the practical benefit is simple: another large-format grocery and household-goods option closer to home. A fuel station could also add convenience for members who already use Costco services.
A useful relocation-planning detail
Relocation buyers often evaluate more than the home itself. They also ask about grocery access, fuel, medical services, dining, commuting routes, and future development. The Costco proposal is one piece of that broader Southern Grove story, and it may help buyers understand where new commercial activity is concentrating.
No automatic promise about home values
A new retailer can influence traffic patterns, shopping habits, and perceptions of convenience, but it does not determine the value of a particular home. Property values depend on many factors, including community, lot, age, condition, upgrades, fees, insurance costs, supply, demand, and comparable sales. Buyers and sellers should evaluate those fundamentals rather than assuming the Costco project will produce a specific price effect.
What Should Residents Watch Next?
The next meaningful milestones are final approvals, completion of the property closing, the start of construction, and an official opening announcement. Roadway access and traffic-management details also matter because the warehouse and fuel station are expected to draw significant vehicle volume.
Until those milestones occur, the safest summary is: the Port St. Lucie Costco is planned for Southern Grove, with a reported 2027 opening target, but no confirmed opening date yet.
Frequently Asked Questions
Is Costco opening in Port St. Lucie in 2026?
No current verified report supports a 2026 opening. As of October 6, 2026, the latest reported target is 2027.
Will the new Costco be in ZIP code 34987?
The proposed site is in Southern Grove near the 34987 area, at approximately SW Village Parkway and SW Marshall Parkway in southwest Port St. Lucie.
How big will the Southern Grove Costco be?
Public figures have ranged from about 158,000 to 170,000 square feet. The difference reflects evolving descriptions of a project that is not yet complete.
Will the Port St. Lucie Costco have a gas station?
Yes. A gas station has been part of the publicly described proposal. The zoning framework also allows a tire center, liquor sales, and outdoor seasonal merchandise.
Is the Costco project next to the distribution center?
Yes. City materials describe the retail site as adjacent to Costco's Southern Grove distribution depot.
Will Costco raise home values in Tradition or 34987?
No specific value increase can be promised. The store may improve convenience for some residents, but home values are shaped by many property-specific and market-wide factors.
Sources and Update Note
This article reflects information available as of October 6, 2026. Plans and timelines may change. Key sources include the City of Port St. Lucie's March 2026 project announcement, the City's approved land-sale record, and WQCS reporting on the July 2026 zoning update and 2027 target.
