I am working on this site as a architectural student, proposing a scheme. However the site has a grade 2 listed building on it. I want to know wether i can make alterrations to it. e.g. alterrations to the facade, extend, connect another building to it, or even add contemporary structure to it? any advice or help will be much appreicated.
Contact the local authorities having jurisdiction and ask them.
Visit the local building department and / or planning department and ask them.
Consider working with a local licensed architect familiar with technical issues.