Cardiff’s inner suburbs of Roath, Cathays, Canton and Grangetown are long Victorian terraces with modest roofs. Rhiwbina and Llandaff North have more 1930s housing, and Plasdŵr in the north-west is a large new-build area. The valley towns, from the Rhondda to Merthyr Tydfil and Ebbw Vale, are terraces built along the hillsides. Roof direction and shading from the valley side vary street by street. Swansea mixes Victorian terraces in the Uplands and Sandfields with larger houses towards Sketty and Mumbles. Newport has terraces near the centre and new homes at Glan Llyn.
Wales has its own permitted development rules, set by the Welsh Government, so the planning checks differ slightly from England. Planning goes through your county or county borough council, such as Cardiff, Newport, Swansea or the Vale of Glamorgan. Bannau Brycheiniog National Park and the Gower and Wye Valley Areas of Outstanding Natural Beauty need extra care. The network operator is National Grid Electricity Distribution. South Wales is more than 90 minutes from Ferndown, so the first survey is usually a video call, then a site visit. Pembrokeshire is at the far edge of the area, so call first.