Extension idea + rough cost?? pics inside!

[eviled]

Hi just wondered if this looks possible and roughly how much I would be looking at?
I have absolutely no idea!

the red beams are RSJs roughly 3.5, 2.5 and 4.5m in lenght (back to front)
bi-fold doors 4metres long
glass single pitch roof
new double glazed window
I want to open my dark kitchen up into the overly large utility and light and garden view in
as it stands now

and how I want to to look


feel free to give me any design pointers too!

thanks in advance

Ed

 

[freddiemercurystwin]

£15-£25K