I bloody well hope so! It's been going on since May but not yet insulated or weatherproof. Still, the builder promises it will be done before my baby - which meant he was terrified when we told him yesterday that Squirmy was engaged, right way round, and ready to go! A full crew is on site as I type!
We're having one large bedroom with a balcony, a small room, and a decent bathroom with walk-in shower as well as a bath, so we're really looking forward to the space. The stairs will simply continue above the existing ones, and we'll still have about 1/3 the floor space under the eaves for storage. The architect was great and suggested lots of things we hadn't thought of, like the balcony, and how to fit an extra room in rather than just a large landing.
It's costing a lot (but actually we have a very good deal, so as long as work progresses we're sticking with the current builders), but includes necessary re-roofing of the whole house (original tiles, last around 80 years. House built in 1905...), and insulating it to modern standards, which will save some cash on gas bills (bill halved previously when we got a new boiler that wasn't outside...)
I find I can sleep on the sofa even when they're banging away. The main annoyance is that the TV aerial keeps getting knocked, but luckily MrNC is happy to go up there and phone me as he tweaks it to get it back in position!