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.Construction documents must match the proposed construction. Cross Section Detail. For new construction, a Certificate of Occupancy is issued upon completion of all the required inspections. Below you will see FAQs that address the most common questions we receive. To the right you will see a navigation bar with FAQ's related to particular topics. Proposed expansion of FM 3351 between I-10 and SH 46, in Fair Oaks Ranch and San Antonio, which covers portions of Kendall, Bexar, and Comal counties. Blue Bexar is a small and growing residential construction company in San Antonio, Texas, with three full-time employees.