A 1-acre South Boston industrial property approved for 250,000 square feet of office and lab space has been sold to Tishman Speyer for a potential speculative development.

Banker & Tradesman in June first reported the pending $80 million transaction at 105 West First St., which was marketed under the “Parkside on A” name by broker CBRE/New England. It contains a 15,300-square-foot warehouse and surface parking.

The Boston Planning and Development Agency approved the 250,000-square-foot office and lab development in June 2017, but a zoning board of appeals permitting process and appeal had held up the final approvals until this month.

CV Properties and Ares Management bought the property in April 2018 for $25 million.

Developers including Alexandria Real Estate Equities, Related Beal and WS Development are exploring opportunities to build office and lab space in the Seaport District and South Boston, with the citywide vacancy for lab space recently pegged at 1.1 percent by commercial real estate industry research.

According to a JLL Boston research report, the new owners are planning to build Parkside on A on speculation.