Prosper commission approves preliminary site plan for 32-acre Hub 380 project after debate over parking and open space

The Prosper Planning and Zoning Commission approved a preliminary site plan and conveyance plat for the Hub 380 Edition — a 32-acre mixed‑use development on the northwest corner of Prosper Commons Boulevard and University Drive — by a 4‑to‑3 vote on the commission's consent agenda. The approval covers a conveyance plat and a preliminary site plan showing 17 buildings across eight lots.

The plan matters because it lays out parcel boundaries and general building placement for a large commercial tract and establishes the baseline for later final site plans, which will return to town staff and the commission for more detailed review. Commissioners focused their questions on how the plan accounts for required open space, utility and pipeline easements, stormwater detention, and an illustrated parking layout that exceeds the town's minimum standards.

Town staff told the commission the preliminary submittal shows eight lots totaling roughly 197,690 square feet of building area across the tract and noted that portions of the site are constrained by an overhead electric easement and a pipeline easement that run adjacent to Lot 1. Staff said detention will be handled on each lot and described one area of Lot 1 as a wet pond used for detention. Staff also confirmed every lot meets or exceeds the town's 7 percent open‑space minimum; Lot 6 was the closest to the threshold and therefore the most detailed on the plan. Staff clarified the town's definition of open space excludes required landscaping buffers and sidewalks, and that detention ponds must be evaluated case by case to determine whether they qualify as amenity open space.

Commissioners repeatedly questioned the large amount of parking shown on the preliminary plan. The plan demonstrates roughly 1,562 parking spaces on the tract compared with the town's identified minimum of about 901 spaces for the proposed uses on the submitted layout. A representative for the applicant acknowledged the parking counts on the preliminary plan are placeholders in some areas and said the developer "will not build more parking than what's required" and that excess paved area would be converted to green space or pedestrian amenity on final plans.

Commission discussion also addressed whether the commission could set a cap on parking as a condition of preliminary site plan approval. Town staff and legal counsel advised that imposing a maximum parking cap at the preliminary stage is not generally appropriate because the final site plan process and the specific use of each lot determine required parking; if the developer agrees to a lower figure, that must be reflected on the approved site plan itself. Counsel explained that approval of a preliminary site plan gives certain development rights that may limit the town's ability to later deny a final plan that conforms to the approved preliminary layout, so conditions must be specific and enforceable.

Several commissioners pressed the applicant for a more detailed final design that would soften expanses of parking and detention areas with landscaping and pedestrian amenities. The applicant said lots 6, 7 and 8 have end users identified and are likely to be built first; other lots may change in configuration as final users are found.

On a motion to approve items 3e and 3f on the consent agenda, moved by Commissioner Harris and seconded by Commissioner Blansett, the commission voted 4 in favor (Commissioners Harris, Carson, Daniel and Blansett) and 3 opposed (Commissioners Hamilton, Jackson and Furey). The motion carried and the preliminary site plan and conveyance plat were approved subject to town staff recommendations.

The consent‑agenda approval advances the project to the next level in the town's development process; final site plans for individual lots will return with greater detail on landscaping, building elevations, parking counts and stormwater design.