What is roughly the average time spent by a design team on riba stages A and B?
john kellett
Impossible to quantify. That's why an hourly charge is recommended! If everything goes swimmingly Stages A+B for a small extension could be an hour but if there are town-planning issues to resolve or difficult brief then time could easily be in excess of Stages C+D. Likewise for a large project the minimum would be only a few days. In terms of setting a lump sum fee (if demanded by client) I usually make a guess based on there being no 'issues' and place lots of caveats with all additional work being charged for at an hourly rate.
