We have just discovered this pregnancy is twins, and we will need an extra room (expected dc2 was going to go in the box room, two babies just won't fit beyond the first few months). Speaking to friends, it seems a loft conversion will be quickest/cheapest. But we know nothing and need to get this done by September, and, ideally, sooner (can't imaging building work and newborns). So we need to learn quickly.
Can you please share what worked and what didn't with your loft conversion? We will move upstairs, the kids will be downstairs. We are in a (small) 1930s semi, and hope to get something with a flat roof at the back so there is some headroom, and a shower/toilet (which will need a window). Beyond that, we're not really sure what's important, how long it will take etc. Thanks