It can be very difficult to acurately date old buildings, not least because they've often been altered significantly over the years.
You often find bits of clay pipes whilst working on them, shoved into the walls where the builders broke them and discarded them, this can sometimes be a help.
In my house we found some coins secreted in the corners of the floor which gave us a date of about 1750 but this was still about 70 years later than we think the house was first built based on some of the pipes.
There are of course certain features that point to certain periods. Jettys like this are characteristically Tudor
http://www.windowsonwarwickshire.org.uk/spotli ghts/rich_or_poor/assets/images/jetty.jpg
If the house is really old it may predate the fireplace. At first fires were in open halls and the smoke was allowed up through the roof, then came a brief period of smoke bay houses where the house had a partition for the fire to be burnt in. Then finally you got proper fireplaces. Many houses were adapted to incorporate fireplaces and bread ovens may have been built in then.
You can do dendrochronology (at a price) if you have original beams anywhere.
If you live anywhere in the south I'd strongly recommend a trip here:
http://www.wealddown.co.uk/
They have a large number of traditional buildings from various eras. Take some photographs of your house and compare and contrast various features - you may even get an expert opinion