Trinity Falls, the master-planned community in McKinney's extraterritorial jurisdiction, would grow by about 106 acres and gain room for 379 more homes under a package of agreements on the City Council's Nov. 3 agenda. The same resolution would start the city's annexation of a separate 144.7-acre area tied to the Collin County Outer Loop.
City staff recommend approval of the resolution, which amends the agreements that created McKinney Municipal Utility Districts No. 1 and No. 2, the 2022 development agreement with Trinity Falls Holdings and a related park agreement.
A new planning unit
According to the staff summary, an adjacent property owner, Shaddock & Shaddock and Master Developers Heritage Farms, asked in early 2024 to bring a 106.516-acre parcel into Trinity Falls under the development agreement. Staff say they have since worked with the owner and the Trinity Falls developer on the land-use and development controls for the tract, which would be called Planning Unit 10.
The new lots would fall under Trinity Falls' deed restrictions and homeowners association covenants, and future homeowners would pay MUD taxes, the summary says. The developer of Planning Unit 10 would build some of the adjacent roadway infrastructure for Hardin Road.
The draft amendment raises the cap on single-family lots across the two districts and any annexed land from 5,304 to 5,683. It keeps a limit of no more than 2,000 lots narrower than 50 feet.
The amendment takes effect only once the Shaddock tract has been annexed into MUD No. 1; if that does not happen, the agreement is void and the current one stays in place. It would also run the development agreement to Oct. 17, 2034, with automatic five-year extensions if obligations remain unfinished.
Annexing the former MUD 2A
The existing agreement says a district called MUD 2A, which staff describe as formed but never activated, is to be dissolved once about 80 acres on and beside a stretch of the Outer Loop are conveyed to the city, and that McKinney may then annex that land.
Approving the resolution would start annexation of the 144.727 acres, according to the summary, which says the affected landowners have signed annexation petitions and the city will join as a landowner. A land swap between MUD 1 and MUD 2 would correct what staff call a prior error in their boundaries.
