In reality, there is no 'best' design for a new conservatory. It entirely depends on what you want, what type of house you have and what space you have available. For the maximum amount of useable space there are three main designs, the leant - to, Edwardian and gable fronted. With straight walls these designs enable you to best furnish the conservatory whilst retaining the maximum living space as well. Also with the gable fronted and Edwardian styles, the extra height inside makes for a light and airy space.
We supply lean - to conservatories in various styles. The most popular is the low pitch roof variety. This with its' 2.5 degree roof pitch is ideal when butting up to a bungalow or other property with height restrictions. Again, plenty of useable space inside. We also do other versions with roof pitches from 10 degrees or more. This gives a more airy feel than the low pitch and is just the job where there are no height issues.
The Victorian with its' angled walls and roof look great but because of the angles involved, obviously there is less space inside than a rectangular design. However on the larger ones this is not so much of an issue. Again with the 25 degree roof pitch, these have a light and spacious feel due to the ceiling height.
If space is no object, why not go for a P or T shaped. These combine the lean - to and Edwardian / Victorian in one hit and are ideal for larger detatched properties. These can be very large. It just depends how big you want to go!