Amended Floodplain Ordinance Effective September 1

Chapter 19 and approved changes to Design Standards (Chapters 9 and 13 of the Infrastructure Design Manual and Building Code) will become effective September 1, 2018. Any administratively complete plans submitted prior September 1, 2018 will be reviewed based on the 2008 Chapter 19 and the 2017 Design Standards. Any plans that are submitted prior to September 1, 2018, that are not administratively complete, or plans submitted on or after September 1, 2018, will be reviewed under the 2018 Chapter 19 and Design Standards.

Only the scope of work included in plans submitted or approved prior to September 1, 2018, may proceed under the provisions of the 2008 Chapter 19 and the 2017 Design Standards. Changes to previously approved plans will be reviewed as outlined above. 

Chapter 19
Grading and site improvements included in administratively complete site work plans submitted or approved before September 1, 2018 will be reviewed, permitted and constructed based on the 2008 Chapter 19. Any plans for buildings submitted on or after September 1, 2018 will be reviewed, permitted and constructed based on the 2018 Chapter 19.
 
In order for buildings to be reviewed under the 2008 Chapter 19, administratively complete building plans must be submitted before September 1, 2018. That is, for a building in the 100-year or 500-year floodplain to be built below the 500 year flood elevation plus 2 feet, full building (not just foundation) plans must be submitted prior to September 1, 2018.

Detention Requirements (Chapter 9 and 13 of IDM)
For administratively complete redevelopment plans submitted prior to September 1, 2018, required detention will be calculated based on the 2017 Chapter 9 and 13 of the Infrastructure Design Manual (IDM). Assuming the changes to Chapter 9 and 13 of the IDM are approved, for plans submitted on or after September 1, 2018, required detention will be calculated based on the 2018 Chapter 9 and 13 of the IDM. Detention requirements may be addressed in site work plans. Any proposed buildings may be shown on site work plans as impervious cover and as part of the detention calculations, but building plans do not have to be submitted.

Drainage Plan for Plat
Drainage plans for plat submitted prior to September 1, 2018, will be reviewed and approved based on the 2008 Chapter 19 and 2017 IDM. However, plans submitted for such a development on or after September 1, 2018 will be reviewed, permitted and constructed based on the 2018 Chapter 19 and Design Standards, regardless of the date of drainage plan for plat submittal.

Administratively Complete Plan Submittal

Residential plan submittals are considered to be administratively complete when the Houston Permitting Center is in receipt of all required drawings, documents, worksheets and forms as outlined on the Residential Pre-requisite Checklist (Form CE-1301).

Commercial plan submittals are considered to be administratively complete when the Houston Permitting Center is in receipt of all required drawings, documents, worksheets and forms as outlined on the Commercial Pre-requisite Checklist (Form CE-1105).

Note: the pre-requisite checklists will be updated on September 1, 2018 to reflect the new requirements.

Additional Resources

For questions, please contact Floodplain Management Office at [email protected] or 832-394-8854.    

Posted Date: 
August 29, 2018

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