A developer will soon file detailed plans to replace a warehouse and Boston EMS ambulance garage at 287 Western Ave., behind Jessie and Katey's Art House, in Allston with a 90,000-square-foot lab building aimed at smaller start-up firms in life sciences.
In a letter of intent filed with the BPDA, King Street Properties, which specializes in building research buildings, says part of the project will include finding replacement space for Boston EMS.
The building would be surrounded by other buildings in the company's Allston Labworks life-sciences and residential complex along Western Avenue.
The company, says it expects to file a "project notification form" with more specifics within two months.
287 Western Ave. filings and meeting schedule.