Two of the nation’s biggest life science real estate developers -- Slough Estates and Alexandria Real Estate Equities -- are squaring off in the Bay Area over biotech fledglings that may not even yet exist. The competing firms are each constructing speculative buildings geared to serve biotech startups -- incubator space that will be available in the next year or so. U.K.-based Slough is transforming a 70,000-square-foot warehouse in South San Francisco to incubator space now, with 5,000- and 10,000-square-foot suites to be available as early as this spring. Pasadena-based Alexandria expects to break ground on a 165,000-square-foot building at Mission Bay this spring, with one floor of 33,000 square feet tagged for perhaps a dozen early-stage companies.
