We are planning a double storey extension and some internal changes to a house that we are due to move into over the next couple of months. The majority of quotes we have received from architects have been 10-12% of predicted construction costs, which I believe is a standard set by RIBA. So on our budget of 120,000 for the building work, architects fees would be a minimum of 12,000 + VAT. This seems a huge amount to spend on plans, and the fact that this fee could rise if the actual build cost increases, is quite alarming. Architectural designers have quoted £3-5,000 by contrast. They obviously don't have the full RIBA recognised qualifications but some seem to have more specialised planning knowledge which could be useful. Does anyone have any experience of using architects/planners and any advice to offer? Should we just accept that this is what a good architect costs? Or any positive experience of using an architectural designer? Also any recommendations of either in South London would be gratefully received! Many thanks.