Tips for moving baby into shared room with three year old

[2ndonthewayhelpme]

I'm pregnant with my second child and we have a 3 bedroom house but the 3rd bedroom is used for storage and office and is downstairs. Once the new baby is 8 months I would like to move them into the bedroom with son, he will have just turned 3 at this point and he's a good sleeper (at the moment!). Does anyone have any tips on this? Its making me anxious so looking for some helpful advice/success stories.

Here’s a tip: don’t do it. It’ll be totally disruptive for your poor 3 year old. Sort out the third bedroom.

It’s way too early to even think about this. It depends on the character of both DC and how easily they get to sleep and how soundly they sleep.

Don’t! My daughter was the same age when my now 1.5 year old was born. No way I’d have trusted her in the room alone with the baby.
the baby will also wake your DS during the night. I would avoid at all costs and have baby in with you until old enough to share with your son 2+

Why can't you use the second bedroom. Presumably that is upstairs?
You can't seriously think having an 8 month old and a 3 year old in a bedroom on another floor is sensible.

Have you seen this thread? https://www.mumsnet.com/talk/parenting/5560422-19-month-old-5-year-old-room-sharing

Sorry but this is a really bad idea. You might have a unicorn baby that sleeps through, but mine still woke very frequently at this age, plus a three-months period where he woke every 45 minutes throughout the night. He’s now 22 months and we still have a good amount of nights that are a total write-off. My husband and I are so sleep deprived that we hardly function, no way something adults can hardly cope with should be inflicted on a 3-year-old.

We actually kept DD2 in our room until she was 2y (we were cosleeping anyway although we had a next2me forever for the odd times we needed her out of our bed), and she's just going in with her elder sister now (DD1 is 5y).

DD1 is a really deep sleeper so isnt disturbed by the night wakes, and DD2 is more consistently sleeping through now. If you have two good sleepers, you might be able to move earlier, but our second was quite a bad sleeper for a long time. Its nice to do bedtime routine all together in one room.

Our house layout is master in the loft and two doubles on the middle floor. I personally do not think it's safe to have either us or one of them on a separate floor when they are so small. DDs will continue to share until one of them is old enough to be on a separate floor and then we'll rearrange.

Don’t! Why would you do that. Move house or make the 3 rd room into a bed room

Theres also so much privilege showing on this thread. Thousands of siblings share bedrooms - they adapt and get used to a new routine. In your scenario OP, I'd much rather the DC share than have either you or one of them on an entirely different floor. Every second counts in the event of needing to evacuate in a fire.

Vast majority of families who struggle for space keep the baby in the room with them. A baby and a toddler, both being disturbed, while mum and dad are in the bedroom alone? Terrible idea.

Not privilege at all, we currently don’t have space either so our almost 2-year old sleeps in our bedroom. I would never pass on the burden of the sleepless nights to a child, it’s my and my husband’s job to deal with that.

As I said in my own post further up, we kept our DD2 in with us until she was 2yo and then moved her in with DD1 (5y) when she was sleeping consistently through the night. I'm talking about the posts that are saying move or sort out another bedroom. That's not always an option. If OP's third bedroom is on another floor of the house (like our own), then two DC sharing when small (although not as young as 8m) is a perfectly reasonable option. I'd also say that my DD1 slept through from 10months. She'd have been fine to share a room from that point. Every child is different and its no use everyone piling on and telling OP it's a terrible idea when noone knows yet whether she'll have a good sleeper or a poor sleeper.