depends what make and model it is,I charge £120 and up to about £160 to supply and fit,If you are doing it yourself just google "multi-point upvc lock" and pleny of sites will come up to supply 1 to you,just look on lock for make and wether it has roller or mushroom cams or dead bolt or hooks and the backset pnd pz but most sites explain how to take these mesurments,hope this helps
shaun www.sdwupvcrepair.co.uk, January 2009
