Creating a room with no windows and skylight only

[HairyPorter]

We've seen a really gorgeous flat. It ticks a lot of boxes BUT it has 2 huge bedrooms, when we need 1 big and 2 medium sized ones. One of the bedrooms is fairly long (just over 20' x 12').

One way the flat could work for us is if we partitioned down the middle of this room. But the room on the inside will not have any windows if we do this. That corner of the room already has a skylight anyway so there is some natural light, and that room will serve as a kids bedroom, so not used too much during the day.

Is it a crazy thing to do? I worry that room is going to be dark and dingy, and that the resale value will be very badly affected! Opinions please?

[UpForAir]

Would you have to walk though one room to get to another - or will there be a corridor?

[OddFodd]

My attic bedroom runs the length of the house (about 20ft) and has 2 skylights. It's not dark nor dingy :)

[HairyPorter]

There will be a corridor and at the end of the corridor will be one room (which has patio doors and lots of light) and at the beginning of the corridor we will put in a door that leads to the room with the skylight. The plan is for both kids to sleep in the skylight room at present (they still share) and use the other room as a guest, and in a few years when they're too old to share, they can have a room each.

[HairyPorter]

Hmm condensation may be a issue... The 'skylight room' would also have an ensuite as that's where the current ensuite is... I guess it doesn't matter at present as the room is so large and its easy to open the patio doors, but once its divided up its going to be a lot of moisture in a fairly small room after showers isn't it...

[UpForAir]

Presumably there is already some sort of ventilation in the en suite?

Light wise, I wouldn't worry. We had a loft room built, which is 12 by 12ft, with only one velux window. I was getting worried it wouldn't be light enough, but one Velux window is absolutely fine (I wanted two). No issue with ventilation.

[HairyPorter]

Good point Nancy. I'll go bck and check! Thanks! I hadn't considered building safety regs.

[mabelbabel]

We have a kids bedroom with a velux window, plus one really tiny window in a side wall, which in reality is closed and shuttered 99% of the time. The room gets lots of light - roughly south-facing, and is (will be!) pleasant to be in. The velux can be opened for ventilation at the top.
In terms of resale value the thing that has put me off in some houses we looked at was when there's two bedrooms but one is 'through' the other, ie no corridor. Otherwise, if there's space and you have the budget it sounds fine.