Building Permits

In the areas of Bexar County that are outside of a municipality's limits, the Bexar County Fire Marshal Office (210-335-0300) determines when building permits are required for structures are not for a "single-family dwelling." A single-family dwelling is defined as a structure consisting of 3 or less residential dwelling units. The building permit covers all of the following: constructing, renovating or changing occupancy of a building.

Building Permit Authorization

When a Building Permit is required by the Fire Marshal Office, a Building Permit Authorization is required to be completed by Public Works before submitting a building permit application for review to the Fire Marshal Office. The Building Permit Authorization is the first page of the Building Permit form and is used to confirm that all the required County Public Works permits as well as subdivision platting (if required) have been obtained/completed.

For a short summary of the process, read the general permitting process (PDF). For more detailed information, read the permit authorization review process (PDF).


  1. Create a Site Plan showing the location of the building(s) associated to a building permit
  2. Obtain permits (Tree, Irrigation, Signage, etc.) from the City within whose Extra Territorial Jurisdiction (ETJ) (PDF) your property lies
  3. Within the City of San Antonio ETJ, you will also need get a stamp on the Bexar County Building Permit Application and the Site Plan from the Storm Water Review Staff located on the second floor of the Cliff Morton Development and Business Services Center located at 1901 South Alamo Street
  4. It is recommended for you to obtain a Site Development Permit (Storm Water Permit) and/or Floodplain Development Permit at least 2 weeks before submitting the Building Permit Authorization form to Bexar County Public Works Development Services Department located on the 4th floor of the Vista Verde located at 233 North Pecos La Trinidad. Building for verification of permits and signature by staff. Any permits required can be obtained before submitting the Building Permit Authorization and fees are associated with permits listed on this page. There is no fee associated with the review and processing of the Building Permit Authorization.
  5. Submit the original signed Building Permit Authorization to the Bexar County Fire Marshal with the required plans, fees, etc.