Thanks both. Turns out the architect had recieved a letter from the council stating that a notice is needed when the volume is over 64m3 (which is different from the 50m3 on their website)
We've just started our works which includes the demolition of a small side extension & attached garage.
We have just come across the potential requirement for a demolition notice for this, though this wasn't mentioned by the architects, building control company or contractor.
I'm not sure if...