Katy sits west of Houston and spans Harris, Fort Bend, and Waller counties, making it one of the most geographically spread suburban markets in the Houston metro. The city's housing stock ranges from older homes in the historic Katy core near I-10 to large master-planned communities like Cinco Ranch, Tamarron, Cross Creek West, Sunterra, and Cane Island that are still actively building new homes. Katy's position on the same expansive clay Vertisol soil formation that runs throughout the greater Houston area means underground sewer and water lines face the same seasonal swelling and shrinking that stresses pipe joints across the region. The city's commercial growth along I-10 and the Grand Parkway has produced a dense mix of retail, restaurant, and industrial properties that generate steady commercial plumbing installation demand.