The best thing to do is to get a written quote – or 4 – then sit down with it and figure out what else you are going to need to finish the job.
You can make a good start by going here to see an in depth article about What are the most popular conservatories & how much do they cost?
Lean-to conservatories, especially those with UPVC frames and a poly-carbonate roof can easily be considered the best option when it comes to value for money and for the ability to fit into small spaces nicely.
Through careful forethought, planning and soil preparation you can construct an awesome garden room space, a true extension to your home’s internal living area, and add considerable value to your home at the same time.
Go here for more info & price guides: localconservatoryprices.co.uk/how-much-does-a-modern-conservatory-cost