SFGate

Sara Bederman Interior Design If you do not have room for a dedicated shower, consider adding the shower to the bath tub area and keep it simple by using frameless glass shower doors to create a nice bath/shower enclosure. The glass is easy to clean and there is no need for a clumsy shower rod and curtain.

Dytecture Just wondering what is happening at where the number "800" is ?

Emily Haslem The 800 is a shower if I have a 900 vanity. Don't want to make the vanity or space to small given its the only bathroom in the house

kmkh It's a 4 bedroom house with one bathroom? Definitely just a standard tub/shower combination and maximize your vanity for storage+counter space!

Standard North american tub/shower is 32" wide = 812mm. That leaves you 1600mm for vanity - either all vanity or 1200 vanity plus 400 linen tower - but I would have all vanity. Obviously adjust for whatever sizes are standard wherever you are.
have fun!

Overland Remodeling & Builders Where is the entry to the bathroom, in-front of the vanity? Is that the master bath? If so, consider having the shower combined with the tub and a double vanity instead of the separate shower

Carolyn Albert-Kincl Design Kathy is right that you should eliminate the separate shower and concentrate on either a tub/shower or just a lovely shower. Then you'll want to enlarge the vanity to maximize storage there. I'd also add some storage opposite the toilet and the vanity if space allows.

Emily Haslem Thanks guys great help, looks like shower over bath for me