Price ranges for conservatories are difficult to get really accurate, especially if you are looking for some sort of idea early on in the process and that’s why something like an online guide for conservatory prices will come in handy.
However, once you get looking, you should have an idea of what type of conservatory you want to get prices for as there are quite a few:
Plus variations on those designs that would be classed as “bespoke” and not forgetting Orangeries, which are grander versions of a conservatory.
If you want a compact room that is value for money, you could look at Lean-to designs. Square or rectangular medium sized rooms would be Edwardian, Georgian, Gable & pavilion.
Bespoke conservatories would be P,T or L-shaped rooms. Victorian conservatory styles are more of a roundish shape. You can see useful articles on each style here: www.localconservatoryprices.co.uk