Every home gets condensation at some time - usually when lots of moisture and steam are being produced such as bath times, when cooking meals or washing clothes. Fish tanks and indoor plants can also put large quantities of moisture into the air.

In any house experienced builders like CD Hood who specialise in Cambridge loft conversion would considerate it quite normal to find a bedroom windows misted up in the morning after a cold night, this is to be expected and is not indicative of a serious condensation problem.
But if your home never seems to be free from condensation, or you have black mould growth as well, as condensation you might want to take steps to try and reduce it.

What can you do for yourself is produce less moisture-Dry your washing outside whenever you can, if you hang it in the bathroom, keep the door closed and the window wide open.
Never use portable gas bottles or paraffin (flueless) heaters...always cover pans and don't leave kettles boiling.

The other thing you can do is ventilate well, when a room is in use, keep a small window and/or a trickle vent open, ventilate bathrooms and kitchens. Keep bathroom and kitchen doors closed even if they have extractor fans. Finally it is important to insulate and heat your home. Keeping your home warm with insulation, draught proofing and heating: this reduces the risk of condensation. A constant, low-level form of heating provides the most economical form of heat and reduces the likelihood of condensation.