Planning Library

Technical Glossary

The glossary is intended as a technical aid when reading through material hosted on the OPR’s online Planning Library. It aims to serve as an introductory guide to planning terminology and related issues. The definitions included within this glossary should not be considered as legal statements, statutory definitions or interpretations of planning and environmental law. 

The glossary is currently divided into four key themes: Planning and Governance, Environment and Climate, Architecture and Built Heritage and Engineering and Specialised Terminology. This glossary is not exhaustive and the OPR would welcome suggestions in relation to relevant material which could be included within the collection. Please forward any suggestions to

Planning and Governance
Environment and Climate
Architecture and Built Heritage
Engineering and Specialised Terminology
Disclaimer: While every care has been taken in the preparation of this glossary the Office of the Planning Regulator assumes no responsibility for and gives no guarantees concerning the accuracy, completeness or up to date nature of the information provided and accepts no liability arising from any errors or omissions. Please notify any errors, omissions and comments by email to