The Bexar County Fire Marshal Office determines when building permits are required for structures are not for a "single-family dwelling." We have designed our website so that you may easily find the forms and applications you will need depending upon whether you are a homeowner or contractor.Learn more about what is required for new development in the City. View details about the Master Development Plan and the Planned Unit Development plan. A Site Plan with dimensions showing the location of all existing and proposed structures, rights-of-ways and access points. Have questions about building a new home with Tilson? We're here to guide you all along the way. More than deck contractors, Archadeck designs and builds patios, patio covers, porches, outdoor fireplaces and more in Bexar County.