TOtally agree with the PPs,

also I had a 900mm oven as opposed to a standard, but that only matters if cooking's your thing.
I had a walk in linen room and LOVED it.
Check what structure is in any built-ins - wardrobe fittings are expensive if not included.
Make sure the space allows fits the fridge you want to put in there
If there is no covered area out the back and this is important to you, enquire how much it will cost to extend the slab and the roofline. Often this is less than laying concrete later and having a pergola/awning built and it is already included in the council planning as opposed to after market.