What does cartilage mean - ie the "cartilage" of a building?

According to the dictionary, the only meaning I can find for cartilage is cartilage in the human body ie cartilage in your knee.

But it's also used in building planning applications, specifically when talking about listed buildings, "within the cartilage of the proerty" "the cartilage of a building" "the residential cartilage".

I can't find a definition...does anyone know?

Thanks

What does cartilage mean - ie the "cartilage" of a building?replacement windows

the materials its is constructed from!!! (so they are pointing out that any works carried out on a listed building must be as for like)

What does cartilage mean - ie the "cartilage" of a building?windows mail internet explorer

top of a building
top of building
I think you mean "curtilege" which is the exterior dimension of a building