Have lived in places with a tiled window -- tile the sides and top as well as the ledge, so that you go right up to the caulk/frame/glass. Works to let out some steam and store shampoo too!

Maybe look beyond the footprint of existing bathroom. We renovated a bathroom where we were able to have a seperate large shower and keep the bath by incorporating a built in cupboard in a bedroom room adjacent to the bathroom. New Free standing storage in that room has resolved any issue with the loss of the built in.

Will need to see layout to give opinion. Doesn't look like a free standing tub is a good option for you but if you show us the layout we can give you an accurate advice.

Live in NZ near Christchurch. Am trying to find an alternative to tile as a wall covering on the walls OUTSIDE of the shower areas. These are already acrylic as did not want to clean grout lines. Has anyone used any of the panel products on the market for covering the whole room? Has anyone found any to replicate LARGE tiles. James Hardie has hardiglaze but the tiles are small . I really like T&G panelling, again seen A Hardie product but would like a narrower width tongue. Also I think up to ceiling will be a bit much........pHowever what height to end it? Are there less ornate dado rails available? The house is a new build and the fittings are contemporary. TIA for helping.