The owner of an 11.8-acre parcel at 8 Five Rod Highway in Wainscott received final approval to build two houses on it from the East Hampton Town Zoning Board of Appeals at June 3 meeting at Town Hall. Two houses on a single lot are prohibited under the zoning code, but an exception was made in this case because the lot was itself created in the subdivision of a 19-acre parcel approved by the town planning board in 1983.