New group set fitting should be budgeted to cost between *£150-200.00 in labour charges, although this is the price range for a standard mechanical groupset, with all external cabling and non-hydraulic brakes, assuming no major complications.
This cost will cover the removal of your old group set and control cables and the careful preparation and **cleaning of your bicycle frame and handlebars - to be ready to receive and fit your new component parts, torqued to the manufacturer's specifications.
*If your group set has hydraulic brakes, Di2 wiring or complex internal control cable routing, then an additional contingency budget must be allowed for, which will be capped at £100.00 per bike.
** Cleaning can range from a detailed frame clean to partial restoration of the frame colour coating, using Simoniz 'T-Cut original' - it depends on the decals / finish and the frame materials used to build your original frame set.