You are clearly going to need to find out what is the average cost of a conservatory for 2020 so that you can compare the quotes you get against the market to see how well your deal “stacks up”
Cheap UPVC Conservatory Quotes Online

You are clearly going to need to find out what is the average cost of a conservatory for 2020 so that you can compare the quotes you get against the market to see how well your deal “stacks up”
A lot of structures incorporate windows the full length, while others have windows from a center spot or some other spot, with wood, brick or metal for the infrastructure.
There are assorted roofing choices to look at as well. See more here: New & Replacement Conservatory Roof Guide.
Many options exist with regards to the lean to conservatory can be found here: Conservatories UK: Local Conservatory Prices – This applies to sizes, colors and finishes. Companies that supply these will guarantee quality.