Residential New Duplex Permit

A duplex is a multi-family home that has two units in the same building. These two units always share a common wall, but the floor plan can vary. All new duplex residential construction regardless of size, require an approved permit by the Building Inspections Division.

New residential construction must comply with codes: 2021 IBC, 2021 IPC, 2021 IMC, 2021 IF&G, 2021 IEC, 2021 IRC, 2023 NEC. With the recommended amendments of the North Texas Council of Governments (NTCOG).

Apply Online

Step 1.Review Requirements

The following is required prior to issuance of a New Duplex Residential Permit:

  • Address and legal description of project
  • Owner, Contractor and/or Architect information
  • Square footage and area involved
  • Architecture Plans
  • Electrical, Mechanical, Plumbing Plans
  • REScheck – Reference:
  • Engineer’s Foundation Letter and Plans (Signed and Sealed)
  • Erosion Control Plans (View Erosion Control Standard Details(PDF, 4MB))
  • Indicate location of brick ledge
  • Door & window sizes noted and schedules with location, U values and S.H.G.C.
  • Elevation plans with type of exterior wall treatment and brick calculations
  • Brick Selection including Company and Color
  • Hue or Shade of Shingles
  • Wall section of interior partitions.
  • Slab Location Letter (Slab Verification Form provided by Building Inspections(PDF, 68KB))
  • Engineer’s shear wall design (signed and sealed) or as prescribed by I.R.C. chapter 6.
  • Site Plan or Survey drawn to scale showing:
    1. Property lines with lot dimensions (width & length)
    2. All utility, maintenance and / or drainage easements.
    3. Building lines; front, rear and/or side
    4. Building dimensions
    5. Location of any proposed street curb construction.
    6. Location of 100 year Floodplain if applicable with minimum finished floor elevation.
    7. Location and size of existing or proposed sidewalks, driveway and approach.
    8. Location of all abutting street and/or alleys, with type of surface.
    9. Location of sidewalks and inlets

Step 2.Apply Online

You can apply online for a building permit through the City of Grand Prairie's Customer Self-Service portal. First time users will need a valid email address to set up an account. It takes about 5 minutes to create a new account.

Apply Online

What next?

After completing the online application, permits are processed in approximately 5-10 business days. Depending on updates needed from the applicant, as this can result in longer approval times.

Phone / In Person

You are welcome to call or visit in person for help submitting your online application.

Phone: 972-237-8230


City Hall - Building Inspections Division
300 W. Main Street
Grand Prairie, Texas 75050

Business Hours:
8:00 a.m.- 5:00 p.m. Monday - Friday