What kind of room or setting does a residential, indoor spa or hot tub belong?

Wherever you put it, be sure there’s plenty of ventilation and that the room can handle the humidity or you’re going to have a layer of black mold growing over everything in your room. If possible put it somewhere with a skylight—or even better in a secluded area outside (like a private balcony). Being able to enjoy the stars while soaking/relaxing/contemplating in a hot tub at night is among the most sublime of life’s small pleasures.

We would normally have the spa outside @Yellowdog. Some people put them outside in the open, others are situated under the patio or pergola. This is a great site for ideas. Here are some pictures of indoor spas. And here are some pictures of outdoor spas.

I’m sure you’ll find some ideas for your house.

If the spa has a cover it should help control some of the humidity, but you would want a room that can handle a lot of wet and humidity. I’d also want flooring that can handle a leak, and if you can have a drain in the floor all the better. Think if utvas a big shower room if it’s possible. If you are on the ground floor and it’s slab and cement walls less worry for possible damage.

There must be information on indoor pools and spas indoors.

If you have the money you could consider doing an unattached sunroom if you have the land, and do the spa there.

You might want a really fancy two person tub instead. It really depends on how frequently you will use it, and how platonic it needs to be. A tub is drained and filled every time. A classic spa you will need to maintain the chemical levels just like a pool. If the spa is in a tight space it will smell like an indoor pool. Being able to ventilate will help with that. You don’t have to put it in a master bathroom, it can be in a secondary bathroom that has glass doors out to the outside. In the warm months you can have the doors open (French or sliding) maybe to an outdoor screened patio.

Outside is the way to go. I can’t even begin to add ip the cost & logistics of doing this inside except perhaps in a walkout basement or single level on a slab.

Can you do it in a covered patio four seasons room type setting? That might be a great compromise. During the summer you can leave the glass open all the time and use it like a screened room. In the winter you can keep it shut most of the time.

I love the idea of an indoor pool or covered patio pool. I’ve thought about getting an endless pool and doing just that.

If you go on Houzz.com and search indoor pool photos you might get some ideas. I think endless pools has photos also on their website.