Please Help design my upstairs - with diagram

[Notanarchitect]

Have been backwards and forwards with architect to redesign our upstairs and do away with the ancient single 'room' upstairs, we live in what is primarily a bungalow so the idea is to build up higher, with a new roof, to give a complete full-size upstairs.
I'm not quite sure we know what we want, and I don't think the architect understands what we want as he is sticking in too many en suites. Does everyone have all bedrooms bar one with en suite? We've a downstairs room that could be a bedroom, and a bathroom below, so ideally don't want each bedroom to have en suite, CBA to do all that cleaning!
I've attached a diagram as I know you all love diagrams.. sorry it's not very good.
I've been on here for years but have name changed because I'm sure next door could identify who I am, and don't want to let on we're going to extend just yet because they object to every planning application in the area

Key points are:
a)House faces approx north west. The windows can more or less go anywhere other than the left hand wall. Windows will be dormers and can go front or back, the roof will slope down to the new height walls at the front and back, so I've drawn in the 6ft height line. Could put windows on right hand wall which faces approx north east as this side doesn't overlook anything due to a bend in the road. Can also use skylights in the slope of the roof to add light.

b)The stairwell, which goes down towards the front of the house (nearest), ideally needs to have a landing to the left of it and the whole to be well lit (otherwise downstairs hallway will be very dark). Big window there perhaps?
c)The main family bathroom has to ideally go above the plumbing/drainage below.
d)The airing cupboard, Aga flue and chimney breast are non moveable items (although airing cupboard door could open in any direction)
e)We do need some storage cupboards.

Four or five bedrooms, or four beds and a study? Study area on the landing?
Family bathroom and 1 or 2 ensuite?

Please help as I'm really stuck on this!

The space is 13m by 9.6m then roughly if I have understood correctly? And you want to get 4 or 5 rooms plus bathroom(s) in there? I don't see how you can or have I misunderstood something?

What's the space either side of the staircase where that would come up into the loft? You need to think where beds will go in rooms and what size beds. My reason for saying I don't think you can get 5 rooms + at least one bathroom is because of the things you have to work around and configuring the space. DP says it's a huge space and layout will depend on what the eaves are like.

Just a thought - has anyone else done similar in the area with a bungalow of the same design? Could be worth looking at past planning applications or sales particulars in the sold prices section on Rightmove.

It might be easier if you post what the architect has drawn and what you don’t like and we could come up with suggestions?

How the architect has drawn it is a central corridor with a room in each corner, with the bathroom and a small study at the central back of the house )opposite stairs), but he's stuck en suites on 2 of the rooms. Each room has one or two dormer windows (to the front or to the back) so you get the headroom.
Didn't want to post the actual drawings in case architect (female with kids) is a mumsnetter.

Good plan to look at other bungalow extensions, unfortunately there are not many former bungalows left (usually they sell the plot and build 1 or 2 big detacheds, there are a couple extended but both have flat roof extensions upstairs, we are building up then putting the pitched roof on.

There's nothing that cannot be moved either side of the staircase, at present it just comes up into the room, stud wall either side, small 'landing' with a door into the room, a large (wide) room with a small flat roof dormer with 2 windows to the back, sloping walls other than to the side, with big eaves cupboards. Not masses of headroom though.

Downstairs are 5 rooms and a bathroom, and the hall/stairs so I can't see why you can't fit the same upstairs.
Will double check the measurements but think it could be 14m x 9.6m

Notanarchitect,

To get same footprint as downstairs you would need to build walls all around and put roof on top. If only converting loft, you would loose a lot of space in eves before you reach a usable height.

Okay, so with a bathroom downstairs, I would look at putting an ensuite for the master bedroom backing onto the upstairs family bathroom. What about making the existing ground floor bathroom just a downstairs loo, possibly with a shower - would that give enough space to carve a study out of there? Do you need all the bedrooms for family members living in the house or will one or more be for guests? If so then depending on how frequently you have guests staying you might want to add an ensuite shower room to another bedroom, but I agree that an ensuite per bedroom is excessive. I'd rather have a sizeable built in wardrobe in some of the bedrooms than an ensuite.

Yes we are going to build the walls up to create a proper first floor the same square footage as below.
We could have a study downstairs.
We do need 4 bedrooms as a relative will be living with us & we have regular visitors (tcurrently stay at a crappy Premier Inn-type place just down the road but it's not nice). So 1 family bathroom, 1 master bedroom en suite, 1 guest shower ensuite. Downstairs bathroom has a bath, shower, toilet, we're trying not to touch downstairs this time around to keep the cost down but in the long term this will become a wheelchair friendly wet room/dog shower room..we can do the conversion ourselves. (Architect seems to think we have a bottomless pit and wants to change layout downstairs despite us saying no changes)

So if you are building the walls up, why are you having dormers and velux windows? That suggests the plans are for converting the current loft space rather than raising the roof. I'm confused.

Personally I would have a large central landing with a desk space in, keep the bedroom downstairs and have 3 fab bedrooms and family bathroom upstairs...master could be double aspect and divide the other end up into 2 large doubles, family bathroom in the middle where the pipes are?

We apparently have to have dormers because we cannot go for normal full height roof due to the fact our house is on a slight hill and sits a few feet above the house next to it one side, so we cannot go too high to the ridge even though the house next door is actually 40ft away and is a massive mansion, 5 x the size of ours.
So the new loft above the first floor won't be as high as the old attic room.

@Bracken101 good idea about landing with desk space, that'll keep the hallway light, but I think a masterbedroom double aspect would be too big, that's going to be over 28ft long. Too much carpet to hoover, even if taking an ensuite out of it