We have put together a list of helpful links to aid you in your work: 

City of Houston Home Page

Commercial Permitting & Enforcement

Certificate of Occupancy

Residential Permitting

Commercial Building Permits

City of Houston Code Enforcement Forms and Publications

COH Planning and Development

Fire Marshall Permits and Inspection

Harris County Home Page

Harris County Clerk (DBA's)

Harris County Appraisal District

Harris County Engineer's Office

Harris County Tax Office

Harris County Fire Marshall

Harris County Flood Control District

Texas Online - State Information

Texas Residential Construction Commission

Texas State Comptroller Tax Website

Sales Tax Permit Application

Texas Workforce Commission