Houston does not use conventional zoning to prohibit an ADU citywide, but a new accessory dwelling or conversion still requires the applicable residential building permit and site review.
Floodplain, building lines, plat and lot conditions, drainage, utilities, fire and building code, deed restrictions, easements, and existing unpermitted work can still block a project.
What this tells youComputed rule answer
How precise this isComputed rule answer
Official data checkedHouston Residential Plan Review
Next stepCheck parcel rules and project scope before design, purchase, or contractor conversations.
City answerNo conventional zoning ban on ADUs
Before constructionResidential building permit and applicable site/trade review required
Still verifyFloodplain, building lines, plat, drainage, utilities, code, easements, deed restrictions, and existing work