If you go on your local authority website under planning they will have link to planning portal this will take you to what they call interactive house the picture shows house outbuildings fences etc click on the he'd and it will give you all the current regulations ie height distance from other buildings fences etc If I can find the link I will try and post if https://www.planningportal.co.uk/ hope this works if it does scroll to bottom and you will see interactive section