What is this type of conversion called (picture)?

[CharlotteWeb]

Hi all,
My house has very ugly dormers built into the roof on the 3rd (top) floor (formely the attic). I'd like to replace them with something like this photo to increase the internal floor space as well as looking nicer.

Does anyone know what this type of conversion is called (is it a wall dormer?). It doesn't seem to come up as an option on loft conversion sites, but I've seen quite a few similar things around various cities.

Has anyone ever done something like this?

Any ideas on what the cost might be? I'd be looking to have one of these on each side of the house.

Thanks for any input!

Another example…
My house is in a 'historic' neighbourhood, hence the style of buildings in the photos. I woudn't want some modern glass monstrosity plonked onto the roof (as an architecht suggsted!).

It’s called a mansard, I think

Yes it is a mansard

expensive

I thought those were part of the original building. Not added in later.

I thought a mansard was like another storey but looks like a roof with a window poking out? Like this

A mansard is something different. These are mansards.

SwedishEdith X-post! Yes you are absolutely right.

@Mamette

I thought those were part of the original building. Not added in later.

I think it appears that way if they are done very well.

Dutch barn, I think.

Gable or Dutch gable if its the shaped one in first picture

I was nearly right!

I don't think that's a mansard. Isn't it more of a gable end!

Meant to put a question mark not exclamation mark, sorry

Gable dormer. We've got them - much nicer than bog standard flat roof dormers, and not much more expensive.

@NewYearNewTwatName

expensive

Why though? Surely it's just a matter of building up the external wall on the lower level and then adding a bit of roofing (and a floor internally). Obviously I know nothing about building, but why would that be more expensive than any other extension?

There are lots of types of dormer- take a look at segmental dormers

"Dutch gable" is yielding some interesting ideas, and a related expression: "parapet gable".

titchy I think the crucial difference is that they type of dormers I want are flush with the exterior wall on the levels below rather than being set back.

@LynetteScavo

There are lots of types of dormer- take a look at segmental dormers

It seems like this phrase is interchangeable with "wall dormer".

We have a dormer with a pitched roof, it looks much better than the flat roofed types. We have quite a large overhang so that it looks sort of swiss cottage like.

@Serin

We have a dormer with a pitched roof, it looks much better than the flat roofed types. We have quite a large overhang so that it looks sort of swiss cottage like.

That sounds interesting. Was it hard to get planning permission?