HOUSTON — The Shaw Group Inc. has renewed and expanded a lease for 312,564 square feet of office space at 1430 Enclave Pkwy. in Houston. The tenant expanded its lease by more than 106,516 square feet at the six-story, Class A office building, which is located within the Enclave Office Park. Eric Anderson and David Baker of Transwestern represented the landlord, Piedmont Office Realty Trust, in the negotiations. Bill Bosack and Wendi Little of GFM Real Estate represented the tenant.