AutoCAD Scale Adjustments for House

I have a complete set of DWG drawings for a modest three-bed semi-detached house in the UK. A fresh measured survey shows the overall footprint is fractionally off, so the proposed plans now need a uniform scale adjustment.

You will receive:
– The correct existing floor plans and elevations in DWG
– Proposed DWG files that actually need the tweak

Your task is to put the proposal into the new existing drawings and to update the elevations to reflect the couple of windows that changed from existing to proposed.

Turnaround as soon as practical would be appreciated; feel free to ask if anything is unclear.