SynerMark Properties has quietly pulled off a big office play in north-central San Antonio, scooping up the Union Square I and II campus not far from San Antonio International Airport. The partnership bought the two-building complex at 10001–10101 Reunion Place, which totals about 323,949 square feet. The seller was a joint venture led by local owner Worth & Associates, and the price is staying off the record for now.
According to CoStar, the acquisition was announced Monday and shows JLL brokers Patrick McCord, Drew Fuller and Chuck King as contacts on the deal. CoStar identifies the buyer as a SynerMark Properties partnership and confirms the sale closed for an undisclosed amount, marking another institutional move in San Antonio’s Uptown office market.
Campus details and amenities
Union Square is a high-end office campus made up of a 10-story tower and a six-story companion building, with on-site parking wrapped around a courtyard-style layout. The property offers an outdoor courtyard, conference facilities, a tenant market and a fitness center. Marketing materials from Worth & Associates list the 10101 Reunion Place building at roughly 194,399 square feet and peg the total campus at about 325,000 square feet, essentially matching the transaction size reported in public filings.
How the sale moved forward
A listing on LoopNet shows the campus was actively marketed in April 2026, with available suites advertised at asking rents around $37 per square foot. The listing breaks the project into a 131,186-square-foot building and a 192,763-square-foot building, which together line up with the 323,949-square-foot total cited for the campus. LoopNet also names several tenants that were already in place at the time of marketing, including Amegy Bank and MassMutual South Texas.
What this means for San Antonio
SynerMark’s Union Square purchase slots into a pattern of outside investors steadily building their office footprint in San Antonio. Transwestern reported that a SynerMark partnership acquired Fountainhead Tower in January 2025 and that the firm has overseen upgrades and leasing there. Transwestern noted that earlier deal featured a high occupancy rate and capital improvements, a playbook SynerMark could potentially mirror at Union Square. For tenants, the near term typically looks pretty familiar, with most changes on the administrative side, followed by refreshed leasing outreach and amenity work once the new owner settles in.
Representatives and next steps
CoStar lists JLL’s Patrick McCord, Drew Fuller and Chuck King as transaction contacts, while marketing materials from Worth & Associates name Rob Gish and Lukin King as leasing agents for the campus. Those public records outline the transfer, and as of the sale announcement neither the buyer nor the seller had released detailed plans on management changes or any repositioning strategy. Over the coming months, local leasing activity and any capital improvement plans should give tenants and brokers a clearer read on how SynerMark intends to shape Union Square’s next chapter.
