Lancaster is a city in Dallas County, Texas, United States. The population was 25,894 at the 2000 census.
Lancaster is a suburb of Dallas, Texas and is part of the Best Southwest area, which includes Lancaster, Cedar Hill, DeSoto, and Duncanville. Most of the city is in Dallas County. But a extremely small southern section spills over into Ellis County. All of the Ellis County section of Lancaster is plain land with only a few houses and roads in the southern section of the city.~Wikipedia
Here is some possibly helpful information from the city of Lancaster regarding foundation repair projects.