I guess regardless of whether it is a single 1800 (4 door) or 2 x 900mm (2 door) the issue of the doors banging is an issue. but the 2 sinks are at one end so i can't ever imagine doors banging will be an issue really. my main concern is whether 600mm is too big for a single door (and the need to step back out of the way when opening the door)

Kate Recess cabinet, t 90mm frame +6.5 mm villaboard +10mm tile + 2mm adhesive =about 105 mm Leaving about 40mm over the vanity Against 130/140 mm over vanity, and over basin? around 1/4 of basin Centered basin Always work from your finished bathroom back to design implications. Basin dia about 400.?..Vanity 900 . leaving 250 mm clear either side + basin curve on either side and If you are still unsure, draw out a Full Size, mock-up on a piece of thin/scrap plywood or paper, Leave overnight/day or so, discuss Shelves/cabinets over Toilet I personal dislike shelves/cabinets over the toilet, under any circumstances, stuff will be bumped and fall Have you considered an inwall cistern?

I think you can definitely go with same width and semi-recessed since you would like to have as much cabinet space as possible. We've had lots of customers getting same length vanities and mirror cabinets before for design or storage purposes, and their results look great. I've attached below photos from their projects for your reference ;). Same length can look great especially for rectangular mirror cabinets.

Hi Sharon, Although it will look great and is a good solution for adults, it might be difficult for children to use the mirrors if they are installed higher as per the comments. Flipping the cabinet may be an option that will not cost any more money or time, great problem solving! Before installing, ensure that the cabinet shelves will work upside-down, and that the doors can easily be opened from the underside. Could you share some photos when its complete for the community? It might help someone else who stumbles on this discussion. Some other alternatives for anyone else who encounters a similar issue: -Return and exchange for a mirror cabinet that doesn’t have the open shelf. -Return and exchange the tap for the shortest option that can still work with the basin so that the cabinet can be lowered. -Return and exchange the vanity so that it has an undermounted basin so that a lower tap could be used. -Recess the cabinet into the wall and lower the cabinet so that the open shelf may overlap behind the tap, still allowing the doors to still freely open over the tap. -Get a quote for a cabinet maker to install new doors with mirrors so that the open shelf will be hidden but the mirrors are lower. -Use a step stool for children that can tuck away underneath the wall hung vanity.