There is no single correct bathroom mirror height. The finished position depends on the basin, the tap, the people using the room, the light source and the space available above the vanity. A mirror that looks correctly centred on an empty elevation can feel too low once the basin and spout are installed.
Start with the finished basin and tap
The top of the basin, the rim of a vessel basin and the outlet of a wall-mounted tap all affect the usable space below the mirror. A mirror cannot simply be pushed down until it looks balanced if the spout projects into the reflection or creates a constant splash zone.
This is especially important with wall-mounted mixers. Their height and projection must be set in relation to the basin before the wall is closed and tiled. The mirror position then needs to respect both the finished tap and the user’s face.
Vessel basins change the elevation
A vessel basin raises the working surface above a countertop basin. If the mirror is positioned using the same assumptions as an inset basin, the usable reflection may begin too low or the top of the mirror may be forced uncomfortably high.
The elevation should show the finished floor, vanity, countertop, basin, spout, mirror and light together. This avoids solving one item in isolation and creating a conflict with the next.
Leave room for cleaning and maintenance
The lower edge of the mirror should not sit in a position where water repeatedly collects behind it or where cleaning the wall and basin becomes awkward. Where a demister pad, cable or driver is included, the mounting detail needs to allow for the product’s actual construction rather than treating the mirror as a thin decorative sheet.
Consider the whole household
A luxury bathroom should work for the people who use it, not just for a photograph. Check the visible reflection for the main users, children if relevant and anyone who may need to use the basin seated or with reduced mobility. A second mirror, a larger vertical format or a tilted arrangement may be better than forcing one standard height.
Resolve it before tiling
The mirror size, fixing method, electrical feed and tap position should be confirmed before final tiling. Small changes to finished wall thickness, grout lines or stone can change the visual gaps enough to be noticeable.
Read about coordinating wall-mounted basin taps, or see how bathroom lighting affects the face in the mirror.