I'm a Bermondsey resident looking to complete a small single storey extension (with demolition of existing back wall and insertion of RSJ) at my house, within permitted development regs. As well as this, there'll be various other internal works, including radiator fitting and a kitchen fit as well. Does anyone know of a good, reliable local firm of builders for such work? And/or a good local structural engineer to assist with drawings and specs? Although I have the money in place I need to keep an eye on budget. Any recommendations would be gratefully received. Many thanks!