Fitting and design
Bathroom design mistakes that show up later
The mistakes that cause regret are rarely aesthetic. They are about access, ventilation and choosing fittings that cannot be serviced.
How this is actually built
Burying isolation valves and cistern access behind sealed tile is a decision that only hurts years later, when it hurts a lot.
Under-lighting the mirror and over-lighting the ceiling makes a well-built room feel unfinished.
Common questions
What is the single most common regret?
Not enough storage, followed closely by a shower that underperforms on the available flow.
Can mistakes be fixed later?
Surface issues yes; buried services and floor falls usually mean going back to the substrate.

Connected pages on this site
Working out what is realistic in your space?
Room dimensions, the position of the window and where the waste leaves the building decide most of it. Send those and we can be specific.