Average price per square foot is useful only if you buy the average house. Dollars per square foot is only useful when comparing very similar homes. Similar in age, style, upgrades bedroom & bathroom count on similar sized lots with similar views.
A home on a waterfront lot will be worth more per square foot than the same home on a busy street. High end kitchens & baths cost more to build than basic ones, but if there are two homes of the same size on the same street, but one is fully decked out and the other is basic, the nicer home would command more.
I see buyers get hung up on this figure and ignore good counsel from their agents who know and work the local market, please don't make this mistake.
Get an agent who will represent your needs very well, ask them to show you the home you are interested in and a couple others. Then have them do a Comparative Market Analysis before you write any offers. I hope things go well for you.
I would encourage you to contact a local real estate agent and ask them to represent you as a buyer's agent. Part of a buyer's agent services should include providing you with a CMA report so you can judge a home's value prior to you making an offer. I always encourage my buyer clients to look at comps before making offers.