Ideas for splitting the main bedroom so two daughters have space

[Mummybassist]

Have two dd 4 and 9 sharing the largest bedroom in our house. Dd9 needs her own space due to fast approaching puberty. Ds2 is in the box room and needs his own room due to interesting sleeping habits. Me and dh in second bedroom. Need ideas on how I could split the master bedroom, maybe divider or curtain? Not practical to move or for us to sleep downstairs due to money and open plan living room/ kitchen. Any ideas welcome!

We had this issue, living in a 2 bedroom terraced house with two large double bedrooms. One got a cabin bed, and put curtains around the bottom, so they had privacy in the day and as it was high there was a bit of separation at night. Looked also at room divider curtains at Ikea, but kids didn't want it.
We then looked at dividing the slightly larger room, as it comes off the landing, and it would have been cheap to put in a stud wall and extra doorway, but would have only fitted a bed and small bit of furniture (though cabin beds could then have given more room).
We finished by converting the living room downstairs into a bedroom for me and DP, and turning the dining room into the living room. Now we have three double bedrooms, kids have loads of space, and the small shared reception space is fine as we now spend quality time there together while the kids spend what time they want in their rooms. They now enjoy spending chosen time together.
Other options we looked at were putting an extension on the back at around £30-£35k, and moving to a four bedroom house (since most 3 beds had one small box room as the third) but that would be about an extra £100k. We've only spent money on paint and a few new pieces of furniture to flesh out the rooms.

I had to share a room with my sister many years ago and my parents fashioned a room divider with bookcases at the bottom and garden trellis at the top. That gave a bit of privacy but still allowed light in to the side of the room that didn’t get the window. We lived in RAF housing so weren’t allowed to make any permanent changes but with a five year age gap we needed our own spaces.

What about one of those stepped kallax units…they won’t block any light and are handy storage?

https://www.laura-james.co.uk/products/10-cube-storage-shelf-unit-white

We have four bedrooms upstairs for each of the 4DC. DH and I also have our old living room as our bedroom now and dining room is our living room (snug really, as it's smaller). Kitchen is large to fit a table to seat 6. Perfect.

Good luck OP you'll find a way to make it work. We all adapt to our changing circumstances.

Not ideal but could you and ds2 have the main bedroom and two girls have a room each.