We've just has this extension built. We were plannning to block up the door that's marked as a black square on the plan. That'll mean that when you come in the back door or the back sliding doors to get through to the main bit of the house you'll have to walk through the new kitchen and the family room to get to the hall.
Would this put you off?
I can't make putting a downstairs loo in and keep a way through the utility straight to the hall.