Hi Cazza
There are lots of avenues for you to pursue. Maps as suggested are an excellent resource. Which maps will depend on your property. There are Ordnance Survey maps, enclosure maps and tithe maps & apportionments. You may also find out what the land was used for prior to any house being built on the land. As mentioned the local records office for that area or local studies library is the place to head for.
The farmhouse you are thinking of may have been part of a manor or Estate therefore you could look out for Manorial or Estate Records. There are land tax records, hearth tax and window tax records. Rate books, electoral registers, parish records and probate records. Old photographs, newspapers and trade directories. (However, not all will be relevant to the house you are researching).
I have done my house history and I found reading about the local area and contacting our local history society was a great help. Finding out the property was previously part of an Estate opened up many avenues to chase up.
A very useful book is called Tracing the History of your House by Dr Nick Barratt
Have fun!
Good luck