Níall Hedderman · ARB-registered architect · RIBA Chartered Member I've run my own architecture practice in Edinburgh since 2009, specialising in altering, extending and renovating homes. Since 2022 I've given over 340 online consultations to homeowners and buyers across the UK. So you want to build a house extension in the UK, you’ve never done this before but you've heard somewhere that contractors can do projects for a fixed price. Ive run my own architecture practice