Me and DH at loggerheads a little with this.
At the moment we live in a 3 bedroom house.
There is me, DH, our child together and then DHs two from previous relationship.
All 3 bedrooms are fairly large. Me and DH have one, DSC share one and our DC has the other.
All the children are the same sex however our child is a toddler (3) and DSC are pre teens (11 & 13).
It's always been a bit of a sore point as I spent a lot of time doing up our DCs room nicely. It's themed and I'm pretty impressed with how it turned out. DSCs room isn't themed as they are too old for that and is a bit more bland but they have a lot more equipment in it, TV, games consoles, computer etc... So imo yes I spent a lot of time and made a lot of effort with our DCs room but theirs is kitted out too.
Onto the main issue...!
DSC13 has been moaning a lot recently about sharing with their sibling. It's "all he wants in life" apparently to have his own room and so on (typical teen dramatics 😂).
DH has suggested we swap them around so our DS shares with DSC11 and then DSC13 can have his own room.
My response is absolutely fucking not basically.
My reasoning:
Firstly, the age gap. Ds goes to sleep a lot earlier than DSC. He needs his own room for that reason alone. It would likely just mean DSC having to share during the evening anyway when they want to play their games as we can't banish DSC11 from his room so DS can sleep whilst DSC13 has his own room to himself all evening.
Secondly, their room is a fucking pigsty. It's disgusting. Always a mess, they never tidy it and I've given up trying now as it's back in the same state every time they come. Appreciate it's teen behaviour but I'm not having DS have to have a tip of a bedroom just so two rooms can now be used as a dumpsite in the house. His room is clean and tidy and whilst I appreciate that's probably due to his age and it'll be a different story when he's a teen, that's the way it is now. It's not fair on him to go from that to sharing with DSC who can't respect his space and I'm not being roped into keeping it tidy because I'd feel I had to with it also being DS's room iyswim.
Thirdly (and I guess this is probably where I'm a bit unreasonable but it's how I feel), I pay for just as much of this house as my husband does. I want my son to have a nice bedroom. He is my priority at the end of the day. If DH is so desperate for DSC13 to have his own room he can figure out a way of getting a 4 bedroomed house. I don't see why I should pay 50% toward a house that my own child can't have his own space in. I don't have 3 children, I have 1.
This has never been an issue until DSC13 has started mentioning it. There's no way I'm budging.