I found that after some user testing you could jump on to the banister rail and get past the wardrobe to get to the secound floor of the house that will not be done at this section of the house. So to fix this I used a blocking volume so the player can't do this.
I have now imported the models and textures into UDK and created collision the them and placed them as realistically as I could on the stairs.
I have now modelled the wardrobe again split into components e.g. main unit, door, draw so that it would be easier to texture and create collision for.
After having my progress presentation I was aware that to complete the secound floor of the house of my level would be impossible to achieve by the hand in date. I needed to come up with a way of first blocking the back stairs of so the player could not get to the secound floor of the house which will not be built.
After a conversation with lecturers I decided to block the stairs with a wardrobe that has been pushed done the stairs.