If the city of McKinney were to annex the approximately 116 square miles within the city’s extraterritorial jurisdiction, or ETJ, which would take years to do as the city cannot annex more than 10 percent of its incorporated area in a calendar year, the city would nearly double in size from its current estimated size of 68 square miles.
The possibility of McKinney annexing all of its ETJ—or land outside the city limits it is legally allowed to incorporate—is becoming less of a reality because of a new law that passed in the Texas Legislature’s special session in July.
Senate Bill 6, which goes into effect Dec. 1, will allow residents living in areas up for possible annexation to decide to be annexed by petition or hold a referendum.
“For all intents and purposes, [this bill] will stop most growth in the city of McKinney outside where we’re already incorporated, so our growth will happen [within current city limits] and where we’ve already annexed,” McKinney Mayor George Fuller said. “But beyond that it’s going to be very difficult.”












