Confirmation of planning rules flat roof garage

I have a detached garage that is 2m from my house. The garage is 2.3m high from the floor of the garage. The house level is 2 feet higher as it's sloping ground with the garage cut into the slope. The garage is around 1 foot from the property boundary.

I am having a new roof put on and wanted it raised at the same time. The roofer suggested 2 foot would be fine. Planning says 3m is OK unless it's 2 metres from the boundary (which it is) in which case it can only be 2.5 metres.

Anyone know for sure what I can do? Part of me wondered whether I can get away with it because it is sloping ground... The wall at the boundary side is starting at the correct ground level but approaching the house is 2 foot lower than house ground level!

Appreciate any thoughts.

Thanks

Graham

The height is always measured from the highest natural ground level wherever it abuts the building.

gbrown100 said:

it can only be 2.5 metres

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That's to the eaves, not the whole roof.

^woody^ said:

That's to the eaves, not the whole roof.

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But it's a flat roof so it has no eaves.

tony1851 said:

The height is always measured from the highest natural ground level wherever it abuts the building.

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Thanks

gbrown100 said:

But it's a flat roof so it has no eaves.

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A flat roof does have eaves for the purposes of the permitted development rules; it's the point where the wall would meet the top surface of the flat roof if projected upwards. There is a clear diagram of this on page 12 of the Technical Guidance.

Thanks for the clarification Tony and apologies for my ignorance on the matter