The building regs man couldn't care less as to the size of the extension or even if you have planning permission for it... they are only interested if it's built to a safe standard...
I hope you / your builder put in an amendment to your planning permission for the increased size of the extension!!!
As for the cost of the work it seems a little high, but not by a massive amount! it would depend on where you live!
I would say that with any building project any extras/additions should be agreed in writing (inc costs) before work on those additions is started
I hope you / your builder put in an amendment to your planning permission for the increased size of the extension!!!
As for the cost of the work it seems a little high, but not by a massive amount! it would depend on where you live!
I would say that with any building project any extras/additions should be agreed in writing (inc costs) before work on those additions is started