I am lucky, I have access to the original deeds going back some 200 years for my family home which is fantastic. I spent a lovely Sunday afternoon a few weeks ago poring through them on the music room floor!
However, not everyone is so lucky! I have found that the local record office is a fantastic source of information with old maps, deeds, plans, wills and general information. I suggest that be your starting point.
The other thing you could do is take a pic and post it - the different forms of architecture through the years will be apparent to anyone who knows anything about it.