Some of the old warehouses lining a stretch of Sawyer Street across Interstate 10 from the Heights are being primed for new development, as this First Ward area continues to morph from industrial hub to an upscale artsy neighborhood. Houston-based Lovett Commercial is transforming a 1950s warehouse at Sawyer and Edwards into Sawyer Yards, which will have about 40,000 square feet of space for restaurants, retail or offices. The company is looking to fill another 5-acre parcel