To Uyenvy Le...hope I got hat right...as they say "Great Minds..." I've never forgoten my early "nuddie days on Nauru Island" just after WWII...a whole tribe of little chocolate and vanilla kids with the whole Island as our playground...the older ones with a littley to watch over. Now, I was about to log off when I read an article by a fellow who says that its unhealthy to wash too much or have long baths...that in his opinion equate to "stewing in your own juice". He advocates a short shower without soap about tice a week otherwise a 'sink wash'....and expounds his theories based on the healthy, supple, smoothe skin of jungle natives who do not bathe or use soap....all their natural oils preserved....lalalaaa.. Started me thinking about an pleasurable alternative to "stewing" (his opinion)...I like to have a shower after a long bath both to close the pores and rinse off any.."juice". Oh YUK, why did he have to spoil my heaven! I spent years in Italy in a community where people did not bathe at all or use soap but showered briefly on Saturdays so to go to church on Sundays...it was the worst, so I'm not going to go without my ablutions ever again. But...what if there were such water restrictions that we were all limited to a measured amount of water per person? What of our showers and tubs? That started me thinking on how to remain sweet smelling and really clean. My solution was...SAUNA! I go up to the local Gym for a swim a sauna and a massage just to keep as much mobility as possible and I love the Sauna! You mentioned the Spa..but that requires copious water...then there's communal bathing...which is not something I've done as an adult...that also requires water plus...so SAUNA!... I am having increasing problems getting out of my tub. I'd researched the disability 'walk in tubs' that are filled after one gets in and closes the door on the side and in which one sits on a seat submerged in the water, the Molly Bather which is a belt that lowers one into and out of the tub...but being a permanent fixture it spoils the look of the bathroom...and I like pretty bathrooms as well as functional ones...So many options to getting into and out of a tub....some sort of pretty others not. Not because that fellow has worried me but just that I want to enjoy a really thorough, healthy invigorating cleanse that is easy to access, that is relaxing without making a bathoom that resembles sports locker room showers, the ablution wing of an institution or the disbility facilities in a hospital. Maybe remove my lovely tub and replace it with a state of the art practical sauna room could be the go. Any comments Houzzers?

we think you mean 1800 mm wide (left to right) and 460 mm deep (ie front to back?) why not make a newspaper paper cut out for the sizes you're considering and then add different size and shaped basins to see how it feels ...one important point to consider is not only would a deeper basin have more counter space which is usually good, it will also use up floor space which can make a HUGE difference for opening doors and architraves around doorways and for shower entry and standing and walking room so check the size and shape of the room first and then see how everything fits together although i'm hoping that if you are aiming for an 1800mm wide vanity that the room will be quite generous...btw if you like curves you may like to consider having a vanity cabinet made with curved edges as well as adding a curved sink

if you are likely to have teenage children or other adults sharing a bathroom two handbasins can be a great help on busy mornings but the vanity needs to be at least 1500 wide with small inset basins otherwise there'll be no counter space left to stand a glass or hairbrush etc...so depends on space available in each room

if you think about the time taken to do the water damage with the existing layout you could simply repair, and retain the existing layout and have many more years of use....think about how much better the patching and waterproofing products are now (builders' bog and modern waterproofing can do wonders for holes in timber window sills etc) the bathroom is already quite special with dual access and the garden outlook.. dramatic changes would remove the best of what you already have and new owners may prefer other options... i suggest you repair and replace everything to restore the fresh look of the original bathroom and maybe add a curved rod with generous white shower curtains, plantation shutters and new coat of paint to revive the bathroom without making any dramatic changes or spending too much