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"Katy" on an envelope covers a lot of ground that is not in the City of Katy, is not in Harris County, and is not in anyone's city limits at all. On the Fort Bend side it mostly means 1990s and 2000s master-planned housing that is arriving at replacement now.
The Fort Bend portion of greater Katy is dominated by master-planned development that began in the mid-1980s and built out heavily through the 1990s and 2000s — Cinco Ranch, Grand Lakes, Seven Meadows, Falcon Ranch, Kelliwood and the communities filling in along the Grand Parkway. In roofing terms that is a coherent story, and a different one from either the county's older east side or Fulshear's brand-new west:
The City of Katy's limits straddle Harris, Fort Bend and Waller counties; the city's own finance department confirms it is appraised by all three appraisal districts. Beyond the city limits, the Katy mailing area reaches much further into Fort Bend County than the city itself does.
No published source splits Katy's population by county. The Census Bureau computes place-part geographies that would answer it, the Texas Almanac lists Katy under all three counties with a single figure, and the City of Katy publishes no breakdown. This page is not going to invent one. What matters practically is not the ratio anyway — it is which side of a line a specific house sits on, because that decides the appraisal district, the taxing entities and whether any city has jurisdiction at all.
For most Fort Bend-side Katy addresses the answer to the last one is: none. Cinco Ranch, Grand Lakes and their neighbors are unincorporated, in the City of Houston's extraterritorial jurisdiction, and a city cannot enforce building codes in its ETJ. So there is no permit and no inspection on a re-roof — see roofing permits across Fort Bend County, and the Cinco Ranch page for the largest single case of it.
The Katy area holds two of the larger Fort Bend hail reports in the modern record: 2.50-inch stones twice on 9 May 2019, logged by NOAA under Katy, with the underlying spotter reports naming Cinco Ranch. That is tennis-ball size, which does real damage to composition shingle rather than merely denting metal. Any roof in this area installed before May 2019 was standing when that happened.
Worth noting alongside it: the county recorded no hail events at all in 2025. Both facts are true and they point the same direction — hail here is rare, violent and unschedulable, which is exactly why it is a poor basis for a roofing plan. The full record is here.
Give us the community and the build year. We will connect you with an independent Fort Bend County roofing contractor — and confirm which jurisdiction the property is actually in while we are at it.
Call (832) 219-9405 Request a Roof Quote