Pigeon lofts come under none perminant structures , however you can only build to a certain size , my council states that all pigeon houses are to be 1 meter away from all boundarys ( i believe this is for fire control ) , the distance from the house i believe has to be 15 foot ( not 100% sure on this distance ) , however i had to submit a detailed plan of the proposed development , which included the whole back garden grided out in size with all structures present and the proposed site for the loft on the garden , all of which i have kept to cover myself for future reference , it was passed as didnt want to build to be told permision wasent granted and would have to be removed if someone complained , even if one is considering converting an existing building such as a garage or shed a change of use application has to be made , i know there be plenty of lofts around with no permision , but better to get things right then you have a better legal footing without getting supprised and upset with a removal order