The lot size is a standard one for this community. It is 70 X 110. There is a mandatory annual HOA of $425 which is very reasonable and covers the common areas such as the entry, the pool, the pond (a ten acre fishing pond).
I am a local McKinney Realtor and came across your question. According to the tax rolls, the property is on .1614 acres. I specialize in assisting buyers in Collin County, and would love the opportunity to assist you further if you are not already working with a realtor. You can reach me directly at 214-736-4636, or feel free to check out my website, http://www.sarahenriques.com for some more community information.