Commercial/Multi-Family Addition

Floodplain Management Office - HPWFMO1015
Contact
Houston Public Works
Floodplain Management Office

1002 Washington Ave., 3rd Floor
Houston, TX 77002

832.394.8854
8 am to 3 pm
Plan Review
Required
Inspection
Required
Renewal
Not Required
Admin fee
$29.18
Plan review fee
Varies (see Conditions & Exceptions)
Valid Period
5 years
Processing Time
1-3 business days

About

Commercial/multi-family addition include the square footage addition to an existing commercial building. This includes the footprint addition to an existing structure.

After Approval

Applicant must pay for permit prior to construction. Permit must be kept on premises in public view, facing the right of way. Pre-construction, pre-fill (if introducing additional fill on site), 2nd elevation certificate, 3rd elevation certificate and final inspections are conducted.

Conditions & Exceptions
  1. Floodplain development permit is not complete until signed
  2. Violations of the permit will be subject to citations as provided per Chapter 19 of the Code of Ordinances.

Fees

Development permit fees vary depending on acreage size and if the parcel is located in a conveyance zone or the floodway. See the City Fee Schedule and search for "flood plain" for more details. 

Statutory Authority
What You Need
  • Project Cost Estimate, signed, notarized OR sealed by licensed Engineer or Architect
  • HCAD summary or private appraisal
  • Mitigation Plan
  • Elevation Certificate showing that the proposed addition will be 24 inches above the 500 year elevation (if project cost estimate is equal to or greater than 50% of value of existing building OR if the footprint of the addition exceeds 1/3 of the total footprint, entire structure must be 24 inches above the 500 year elevation)
  • Elevation plan sheet
  • Conveyance Analysis (if property lies in conveyance zone)
  • Topographic survey
Submit Plans Online

Applicant can use Project Dox to submit online

  1. Upload all required documents and drawings
  2. Mark complete the assigned task.
Submit Plans in Person

Two copies of plans/documentation can be submitted at the permit counter.

What You Need
  • Pre-Construction Inspection: A copy of the approved plans and permit onsite.
  • Pre-Fill Inspection:
    • A copy of the approved plans onsite
    • A completed Pre-Fill Mitigation Certificate.
    • May require: a pre-fill topographical survey and/or evidence of spoils removal and placement outside of the floodplain.
  • 2nd Elevation Certificate Inspection:
    • A copy of the approved plans onsite.
    • A correct, completed original Elevation Certificate marked “Building Under Construction” in section C1 of the certificate.
  • 3rd Elevation Certificate Inspection:
    • A copy of the approved plans onsite.
    • A correct, completed original Elevation Certificate marked “Finished Construction” in section C1 of the certificate.
  • Site work Final Inspection:
    • A copy of the approved plans onsite
    • May require: As-Built Survey, As-Built Mitigation Plan/Calculations, evidence of spoils removal and placement outside of the floodplain.
  • Final Floodplain Inspection:
    • A copy of the approved plans onsite.
      • May require: Flood Proofing Certificate.
Schedule Online

Enter the appropriate project number and click the Submit button.

Schedule by Phone

In Person: 832.394.8854

Automated: 713.222.9922