It is common place for covenants to be part of Title Deeds/Land Registry documents.
Some covenants are included within Title Deeds to restrict development and the impact on neighbouring properties. It is important that you check these documents for any such restrictions. If in doubt, you should liaise with your Solicitor.
Ownership of access roads serving your proposal should also be checked, along with any other restrictions which may affect your right of way. Similarly, rights of way may be present within your development site and thus restrict building.