Modern L-shaped loft conversion by Holland and Green. CLICK http://www.hollandgreen.co.uk/loft_conversions#.U_L8qvldU7k to find out if you could do something similar to your house!
Shed Dormer | ... sealing at base of 2nd story dormer (behind roof apron) - DIYbanter
Villa Lima by Johan Sundberg
Modern timber clad dormer