A Single Queen mattress is 60" x 80". The actual dimensions in your case will depend on the headboard/frame/footboard dimensions that you have because no vacation home should ever be a mattress without a frame/headboard.

For two queens in a single room, you're going to want 4 feet absolute minimum between the beds, then since it's a vacation home you need to plan space for people to put their bags, potentially a dresser and TV. If you don't want it to feel tiny, I would suggest 16' x 12' for the minimum room size, but that'll depend on a lot of stuff (door opening location for closet and entrance, windows, furniture, etc.).

Why 2 queen beds in one room? Are 4 adults going to share the room?

no

for vacation house with room for four - two adults or three children.

I've got the same situation, guest bedroom with two queen size beds in a 16x21 foot room. Closet, entrance, window, etc doesn't impede the beds, just need advice on rug or rugs placement.

I’m looking at 2 queen beds for a room. I was going to do bunk beds when we designed the house. But changing sheets on bunks is a pain. And seems like 2 queens might give more options. My room is 14x14. So it’s a tight fit. It may be possible to change to framing to widen one wall. We are at the studs phase. But not sure about the load.

Iam sympathic but Iam in a delema ! I have a vaca home and need fam room in bedrooms. The bedroom is only 13x13 I want to use two queens. I have a son daughter inlaw n 2 little boys who would be using this space. Can you offer any sugestions? I was told the minimum was a 12x14 room for 2 queens.

For my cottage i decided last minute to squeeze in two beds. I ended up with a full and a queen. i put the full closer to the door. I did matching headboards and the room looks nice . . . and it's not as cramped.

How big is your room?

Just do one Queen and one double. When I was a kid, we mostly brought sleeping bags and slept on the floor.

This are the rooms - both fit a queen and full - headboards on interior facing wall. Full closet to the door. I even fit a small table between the two beds.