Currently live in 3 bed house but extending to 4 bed in 18 months. At present we have mine and dh room with double in, spare room has double in for the rare occasion friends stay; and toddler has cot bed in her room which we only took 1 side off so havent fully converted to bed. In about 6 weeks we will have a newborn too and we are thinking rebuild the cot in the spare room (or babys room as it should now be known!) and buy dd a single bed. This would mean getting rid of the double and spending money on a single as we havent the room to store it. Also we would want a double for the 4th room when we do extend so seems pointless to get rid. I suddenly thought last night could we give the 2 year old a double? What are peoples thoughts on this?