Keller, TX Landscaping Rules: Rainwater Harvesting (2026)

Rainwater harvesting is strongly supported under Texas state law, and Keller residents benefit from the protections in Texas Property Code Sec. 202.007, which prevents HOAs from enforcing covenants that prohibit or restrict rain barrels and rainwater harvesting systems outright. HOAs retain authority to regulate the appearance and placement of rain barrels, including requiring them be located on the rear or side of the home, screened from street view, or painted to match the dwelling. The statute applies to most residential subdivisions in Keller. Small barrels up to approximately 50 gallons used for outdoor irrigation generally do not require a city permit, though connections to indoor plumbing for potable use require a licensed plumber, an approved backflow prevention assembly, and a plumbing permit. Larger cistern systems, especially those buried or integrated with the home, require site plan review and building permits. Harvested rainwater used for irrigation is not subject to drought-stage outdoor watering restrictions because it is not drawn from the municipal supply. Texas Tax Code Sec. 151.355 exempts rainwater harvesting equipment from state sales tax. Keller has historically promoted water conservation through rebates tied to Fort Worth water utility programs, and rain barrel workshops are sometimes offered regionally by the Tarrant Regional Water District.