Philip Leggatt
Hi rachelle With the new wiring regulations you must have to fit a non combustible enclosed consumer unit. Depending on the number of circuits intended on your house would effect the cost . The electrician may also need to upgrade any mains earthing and supply tails to also meet current wiring regs. Pricing based on your description I would say between £500-£600 but make sure you get the electrician to provide you with a certificate and registered with a recognised scheme ie NAPIT, niceic , eca etc The sockets you described that need earthing and additional skt I’d expect the electrician to include in the top end price above but may charge a little more . Hope this helps