jpeg wrote:Doing that will mean your IBI will be increased as you are providing another living space in the property
I thought that was only for fixed glass patio type like you see on upper balconies etc.
The glass curtains not classed as permanent as they fold back and can be easily removed.
If IBI is increased because of glass curtains then there may be a few shocked residents on my community if the council comes round for a revaluation.
And re the OP. Is it the same type of installation? Some companies use plastic sliders and others metal. Some have a fixed entry door whilst others can be slid back. Is the glass the same thickness double glazing?
Loads of other things like the tint on the windows etc can add to the cost.
I don't know of the firms you mention but do you have any neighbours who have used them?
Always good to have a personal recommendation for these things.
(I know that's what you're asking on here but if someone near you has had it done you can physically check the installation).