Planning permission is not normally needed for a loft conversion as they are covered by permitted development rights. A conversion company will tell you if you do and help you with this. For more information, see our article about planning permission.
Machynlleth
Machynlleth, often described informally as Mach, is a market town, neighborhood and electoral ward in Powys, Wales and within the historic borders of Montgomeryshire (Welsh: Sir Drefaldwyn). It is in the Dyfi Valley at the crossway of the A487 as well as the A489 roads. At the 2001 Census it had a population of 2,147, rising to 2,235 in 2011. Machynlleth was the seat of Owain Glyndwr's Welsh Parliament in 1404, and because of this claims to be the "ancient capital of Wales". Nevertheless, it has never ever held any kind of main acknowledgment as a capital. It got city condition in 2000 and also 2002, but was not successful. It is twinned with Belleville, Michigan. Machynlleth held the National Eisteddfod in 1937 and 1981.