Not sure where you are. Assuming you are building in the Southern Hemisphere then the first thing to do is move your garage to the south side of the block and let more rooms of the house enjoy the northerly sun in Winter. Make sure your corridor is wider than standard( imagine two people passing each other comfortably)- maybe an extra 30 cams- you won't regret this. A skylight here that opens to let hot air out in Summer is great. To further save cost, have all wet areas as close together as possible, and if possible,on the south side. A kitchen bench and whatever is on it can suffer enormously with the angles of the sun during the Winter months. Better to put this on the south side and have the family area bask in the warmth when it is cold. Large windows on the north side will ensure plenty of light through to the kitchen. Personally I love the idea of an internal access from the garage directly or as near as possible to the kitchen because I do not want to traipse through other rooms with heavy shopping bags or dirty shoes. Sliding doors to linen cupboards and bedroom wardrobes to save space. Back of house faces West so consider a wider eave to give some relief from the hot Summer sun, which could be shining into your family/dining areas till quite late each day.

Forget how it looks! Put both people who will use the basins in front of the cupboard, and pretend to use the basins and/or other appliances at the same time. Room for someone to shave, while someone else uses a hairdryer or straightener? You are having two basins so two people can use the bench at the same time - so find out what spacing works from a practical point of view. One more thing - if guests will use this bathroom, think about adding a small towel ring near the basins (so, on one of the side walls), so there can be a handtowel for guests to use (one of my pet peeves with modern bathrooms!).

You can buy mirrored shaving cabinets of various widths and heights from many outlets, and even on ebay. The crucial thing is to ensure that the edge of a door isn't centered on the vanity basin otherwise your reflection will always have a "crack" down the middle of your face. You should also consider wall lighting as ceiling lights often put your face's reflection in shadow. In this photo the middle door of three is centred over the vanity basin to avoid the issue. Best of luck Dr Retro of Dr Retro House Calls

Mirror is not just for watching yourself brush your teeth. Also for makeup and hair. One 650 mirror is too small for 1500 vanity