Approved Building lots in a subdivision where you can use your own builder are few. Don't miss out to build in Northwestern Lehigh School District. this lot has much to offer. Neighborhood with $500k-$900k homes. Must build within 6 mo after purchase of lot. Minimum Sqft for 2 story is 3500 sqft, and 2500 for a ranch home. Members of Gateway Ridge are Realtors.