Building or Demolishing a Conservatory in a Conservation Area
Even though this would normally be permitted elsewhere, if you are planning to demolish or build a conservatory in a conservation area, you will probably need to get permission before doing so. It is your responsibility to find out from your Local Authority what conservation area consent you will require and if you go ahead without this, it may result in a fine or imprisonment, or both. Plus the likelihood that the offending structure will have to be demolished.
Conservation Area Consent
As already mentioned, applying for conservation area consent for your conservatory is a separate issue from making a planning application. The Planning or Conservation Officer, liaise with English Heritage about conservation area matters and Listed Buildings. They are usually are happy to discuss plans with you and advise on the steps you should take.
You should also take time to talk to one of Richmond Oak's experienced designers who have had to manage the process before. They will have negotiated with Planning Officers previously and will be able to advise you should you experience problems with someone being pedantic at the Local Authority.
The design will be important; choose a design that complements your home or is characteristic of the local architecture. It is worth taking the time to look at how other conservatories have been built close to you so that you can get some design ideas from them.
Planning Applications for conservatories in conservation areas usually need to be made in detail and not in outline so that the full impact can considered before a decision is made. Amongst several other requirements, this means providing Location Plans, and Plans & Elevations, typically at a scale of 1:50 or 1:100.