A loft conversion is a very common project that allows homeowners to obtain increased habitable space within their premises. In order to obtain more space within a loft, dormers are often used. Rear dormers are more common practise as these are what councils prefer but in some cases front dormers will be allowed. There are two routes which can be followed in order to gain permission, these are Householder Planning Permission or a Lawful Development Certificate (Permitted Development).Permitted Development is a set of rules that outline what you are permitted to do with your property, considering that the house has not had its permitted development rights removed.