Which neighborhood specifically? Heather Ridge, Mackenzie Meadows, Firewheel? Are you wanting to stay to the east of North Star/Garland Rd?
Generally the homes were built in the late '90s - early '00s. A few that are newer than that. Average about $100 per square foot. Good Plano schools but as you get closer to Campbell you enter Garland.
If you want to shoot me an email I can send you some more details and some examples of homes for sale in the area. laneallen @ kw.com