Hi i have already built the walls of my outbuilding, but planning told me to lower the height, which we have done. Now it is permmited D. But my floor area is over 30sq metres, a building control inspector has come out and seen it and told us to do a regularisation. i would like to know do i have to do this or can i just carry on, or can they come and say no we will knock it down if you do not apply.what are the rules. I heard that i do not have to comply with building regs and the only problem would be if i wanted to sell my property some people like to see BR certificate. Also if i did apply and they ckeck it out and are not happy can they stop me from carrying on or tell me to make it smaller. Thanks.