Not all furniture will fit in a UK house. Most second or third bedrooms here are "box" rooms, so 6'' something by 6''. And I don't even think a US sofa would fit through my front door.
Yeah - for the last 2 years, my wardrobe was in my living room because we could not get it up the stairs

. We just about managed to get a single bed frame up the stairs (slatted base with legs taken off), but there was not enough room for my 4-foot bed to go up (it wasn't even a double-sized bed) - we had to take it all apart, unscrew every slat, and carry them up all individually, before putting the bed back together again in the bedroom.
I had two bedrooms in the house, but the second room was so small that there was only just enough room for a single bed, but no other furniture - there was about a foot of space between the bed and the opposite wall, so no room for a bedside table, and only about 1.5 feet of space at the end of the bed, so no room for a wardrobe or anything else.