Is a second shower downstairs a big no, even if you really cannot find a place to put one upstairs?

[Pernickety]

I live in a 4 bed semi - 1930s build. It was built as four bedrooms. It's a lovely house. It has one not very large bathroom. There is a toilet downstairs, still sort of out the back, but joined to the house. When we extand the downstairs, we'll make sure we incorporate a better downstairs loo. I'm keen to make the room big enough for a second shower, as we have fairly frequent visitors and two DDs heading towards double figures.

My research leads me to believe that downstairs shower rooms are undesirable and put buyers off.

I've looked at every potential place to fit a shower in upstairs but it's not possible. If we did not have a chimney breast in our bedroom, it would be possible to squeeze a very narrow ensuite in, but the chimney breast can't go anywhere, as we have a fireplace in the living room below. Where do people manage to eek out a space for an ensuite or shower room upstairs? Am I missing something? And if we can't have a 2nd shower upstairs, is it better to not have one at all?

I have recently bought a house with a (very) small upstairs bathroom, with shower over bath, and a downstairs wet room at the back of the house, past the kitchen.

I love it. I always use the downstairs one. I get up much earlier than DP and it means I can switch the light on and be as noisy as I like without disturbing him.

Ours also doubles as a utility room, with a wall of glass bricks between the washing machine and the shower.

It's seriously by far the best thing about going from my one bed flat to my 3/4 bed terrace.

Hello OP, did you install a downstairs shower room after all? What do you think of it now? Having the same dilemma with a house we are looking to buy! They have an outside loo downstairs with no wash basin (🤨) there’s some space at the entrance we could make a small loo/shower room.
Thanks.