Listing details for 511 Blackson Ave, Austin, TX 78752 : Rare opportunity to acquire two side-by-side lots at 511 Blackson Ave. and 601 Blackson Ave. in Austin, offering a combined 14,867 square feet of land. The contiguous parcels provide valuable economies of scale, creating greater flexibility and efficiency for development than either lot could offer individually. An excellent opportunity for a builder, developer, or investor looking to maximize the potential of a larger combined site in Austin.