Hi, I'm having a room built on to the back of my house and am looking
for ways to control the cost. Could anybody give me a guide for how
much I might pay for plastering 4 walls, total area 25sqm, and a
ceiling (including two small rooflights) area 13.5sqm. I'm in North
Yorkshire.

Is there are a standard price per sqm guide to a reasonably priced
plasterer?

Thanks