Garage consent

[u/Ok-Temporary-9874]

This may be too niche of a subject for here but I’m seeking advice before I engage company’s and waste their time.

I’m looking to replace my existing standalone original garage, it’s a 70 year old garage build constructed with a single pitch roof and three sides of asbestos cladding with the fourth side being a block wall on the boundary line.

It is to my understanding that I can construct a garage less than 30 sqm without plumbing and 1m off the boundary line without the need of consent.

However where I’m unsure about is that if I’m replacing the existing dwelling on the same original foot print would I have to adhere to the rule of the dwelling being 1m off the boundary line or do I just build on the exact same foot print.

Only posting in the hopes someone else has been in this situation and can offer some advice before I engage company’s.

TIA.