Harris County will need a completed residential application and an accurate and detailed site plan. Residential permits apply to any development that occurs on private property and not for commercial use.Harris's plan for the housing crisis is to build more of it. One stated goal is to build three million affordable rental units and homes. Learn how to apply for and obtain a building permit in Harris County. Here's your complete guide to Harris County, TX permitting. The plan relies heavily on increasing the supply of multifamily and single family housing, calling for the construction of 3 million new housing units. You can get copies of building floor plans for properties located in the City through the Department of Buildings (DOB). Floor plans may be viewed at no charge. The SAVE plan is an incomedriven repayment (IDR) plan that calculates payments based on a borrower's income and family size not their loan balance.