conservatory improvements

[seasidechina2013]

Hi all
this may sound a ridiculous question - my conservatory needs an overhaul. The roof is leaking and needs a replacement of some kind. I'm trying to weigh up the options - ie replace with extension or have a new roof etc.
Who is the best person to approach please - architect, builder or double glazing company?

thanks all

All of the above !! Then make a decision based on not only costs - what what the change will mean to how you can use the space !!