Unincorporated Harris County does not require building permits for residential decks or patios, as the county lacks a comprehensive building code. Within the City of Houston, decks not more than 30 inches above grade are generally exempt from permits. Flood zone elevation requirements apply countywide.
In unincorporated Harris County, there is no county building permit requirement for residential decks and patios. However, several considerations apply: structures in FEMA floodplains must comply with Harris County Flood Control District regulations regarding elevation above base flood level, utility connections require appropriate permits, and HOA deed restrictions may regulate deck and patio size, location, and materials. Within the City of Houston, decks not more than 30 inches above adjacent grade and not over a basement are generally exempt from building permits. Higher decks require permits with structural plans, guardrails (at least 36 inches for decks 30+ inches high), and inspections. Covered patios attached to the house are considered additions and require permits in Houston. At-grade patios (concrete slabs, pavers) generally do not require permits in either jurisdiction unless they affect drainage.
No county building code violations for decks in unincorporated areas. Flood regulation violations carry penalties. Within Houston, unpermitted elevated decks can result in fines and required permits.
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See how Pasadena's deck & patio permits rules stack up against other locations.
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