Accessory Building

Accessory Building


A permit is required for the construction of any building larger than 100 square feet. The requirements adopted by the City can be found in the City of Mont Belvieu Ordinance Chapter 42 Section 226., and International Residential Code, 2018 International Building Code, 2018 International Plumbing Code, 2018 International Mechanical Code, 2020 NEC- National Electrical Code and TDI- Texas Department of Insurance Windstorm.


Please apply through My Government Online.


  • Construction drawings 
  • Foundation plan, if on a foundation (must be engineer stamped)
  • Site plan/survey (must include the following):
    • Location of the new accessory structure
    • Distance from the primary structure and the property line 
    • Any and all utility easements on the property.
  • Approval letter from the Homeowners Association (HOA), if appliable. 
  • Engineered Windstorm stamp (for the wind speed of 140mph for a 3-second gust) 

MEP (Optional - required if the structure will have any mechanical, electrical, and/or plumbing.)

  • Please upload the MEP plans and licenses with the above documents.


An inspection request must be scheduled through My Government Online and performed by the City of Mont Belvieu for each task listed below:

  • Foundation Pre-Pour Inspection (If the building is on a foundation)
    • All rebar is in and lifted off the ground with no vegetation and the location is as shown in the approved site plan.
  • Frame Rough 
    • Matches the submitted plans and is compliant with the code(s) listed above.
  • Final Construction 
    • The site has been cleared of all waste and debris.  

MEP (optional)

  • Mechanical Rough 
    • Checking all installed components before the walls are closed. 
  • Electrical Rough 
    • The wiring for all outlets and light switches is complete before closing the walls.
  • Plumbing Rough 
    • Seeing the completion of the project and testing for leaks prior to closing the walls.

Schedule an Inspection

Use My Government Online to request all inspections. If for any reason you cannot log into your account, please:

  • Call the Customer Service line at (866) 957-3764
  • then press 5 for a new inspection.

All Inspection requests placed before 8:00 a.m. Monday through Friday will have a same-day inspection.