It is surprising how much a door can make or break a layout, and how little they get talked about in house planning.
A room layout can be transformed just by changing the swing direction of a door.
But if you have the scope to move a door slightly along a wall sometimes that can be as good as an extension. This is a good example of a small space that gets a huge upgrade just by moving the door over a few inches.
The flow of people between the entrance hallway and the kitchen will work so much better with the door moved by only a small distance away from the corner. The added bonus of a couple of extra kitchen counter space with cupboards underneath makes that move a really good idea. In small spaces the floor area needs to work hard to make the most of every bit of the room.
Of course moving the doors location will require building works. So it is worth weighing up the added value it will bring. Sometimes a bit of work like this is as good as a small extension.
Imagine if this kitchen did not have room for a washing machine? Now this door moving will literally save trips to the launderette. I once saw a small apartment where the kitchen was so small the owners had their fridge in the living / dining space. If that door move made room to get the fridge back into the kitchen it would transform both room
But what if there is no advantage to moving the door but the door still get in the way?
In many cases the door location does not need to move but the hinges just need to be swapped out to make the door open the other way. The effect of that can really transform a room.
When looking at your plans try the door out in all 4 of your options before you commit. Remember a door can open into the room or out of it and either way it can swing from hinges on left or right side of the door. Make sure to add furniture on both sides each time you look at it so you get a sense for the true space you will have when it is built.
There are some conventions to think about. You normally open a door into a room from a hallway. So when you walk into your house the hall is free of doors. The only exceptions are understairs doors where there is usually not enough room. In a small toilet, or to facilitate a wheelchair you may need to open the door out into the hall.
Remember every house is different, and you are the best judge of what is best for your home.