(Inside the building) A floor plan shows the layout and dimensions of the rooms in the proposed construction. Development in unincorporated Tarrant County is subject to the Tarrant County Development Regulations Manual and the Engineering Standards Manual.All permits may be applied for online. 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. This bulletin provides requirements for the condition and preparation of construction drawings and other required documents which. Use this site to research ownership and property history prior to 1984 including original building materials, any additional structures on the property.