How best to wire a new ground floor extension | DIYnot Forums Hi All, I am looking for some advice on how best to wire a ground floor extension. Previously there was conservatory which had sockets installed that were spurred off the dining room sockets under the floor. when i removed the conservatory, i removed the sockets and wiring. House-Extension-Plans - KCR Design House extension plans which can be used for: • Planning permission approval • Building control regulations approval • Builders’ quotes (instead of just estimates) • The construction of the extension. Looking after your new investment A house extension is a major investment in one of the most important things you own – your home. New Extension wiring question. | ElectriciansForums My sister has had a new extension built, as well as one light switch point that will house two switches. I wired this back to the existing lighting, Reply to New Extension wiring question. in the Electrical Wiring, Theories and Regulations area at ElectriciansForums. IET Forums - Wiring a house extension I've been asked to price up a rather large house extension that has just begun. It's basically the size a 2 bedroom house on the rear of what is now a 4 bed detached property. Tallying up all the lights/switches/sockets and everything in between means there will be an extra 120 electrical points going in to the property.