Loft conversion - stairs already in place

[MrsGannicus]

Our loft already has stairs in place up to it and we are considering a loft extension. I'm hoping that it should be a lot cheaper if the stairs don't need to be built. Has anyone had a loft conversion done when they stairs were already in place and how much did it cost?

we had one done but just use the existing loft ladder so not technically a room.
It's a large space.
it cost £10,000 all in

Can't comment on price but if the stairs are already done it can be done with minimum disruption

We did. Total cost, inc architect fees and building regs sign off fees, was £8.5k. That including a steel joist, insulation and flooring, and one velux window. We converted only half of a huge attic, as would have been unnecessarily big otherwise, and that cost also included an ‘escape window’ in the attic portion and an insulated wall and door between the converted and non-converted sections.
We didn’t use a company, instead we just used a local joiner and builder who co-ordinated between themselves.

It depends if you want a 'loft room' which doesn't comply with building regs and doesn't therefore count as an extra bedroom, or a proper loft bedroom. Also depends on whether you want a dormer built, bathroom etc.

Our loft conversion came to about £32k inc all the bathroom fittings etc. The actual stairs cost was about £700 of that in terms of manufacturing them. You might find that the stairs are the wrong size or depth or in the wrong place to rationalise the space upstairs.

The builders would have to put scaffold up to do the roof work and fit the steels anyway. Ours worked from the top down so it wasn't that disruptive, and then bust the hole in the ceiling and fitted the stairs fairly late in the process.