I’ve been quoted about £1100 for a ‘Warm Protection’ compact roller door with a Somfy operator. That’s supplied and fitted. A Hormann up and over was around £850 from the same fitter.
Unfortunately I can’t seem to find a supply only price for either the Warm Protection or Securoglide doors (both have compact versions where the box is 205mm high) I’d like to have a crack at it myself as it looks fairly simple.
I did see a door costing around £600 but it looked like a proper budget job, no sensors so you have to stand there like a lemon holding the down button until it closes, and it wasn’t a compact version.
I wanted a sectional door but again the limited headroom was an issue, plus the roller has the huge advantage of not having three meters of tracks running into the garage 4 inches above my head, and the door not blocking access to the top shelving or lights when open.