In these examples, the owner has opted for a new rectangular space where the stairs and shower room are at the back so that there is a large, regularly shaped master bedroom. The front of the house is unchanged except for the Velux roof lights.

If you have an L-shaped property, as in the drawing below, you could take things further and perhaps move the bathroom back over the extension allowing for two substantial bedrooms - or maybe even a terrace.

As you will see if you click on the button we have been able to provide more than just an extra room, also a shower room ensuite, velux roof windows to the front and a large attractive rear dormer conversion providing much extra space.