In England a Certificate of Immunity from Listing, generally known as a Certificate of Immunity (COI), is a document which guarantees that a building will not be statutorily listed (added to the National Heritage List for England (NHLE)) or be served with a Building Preservation Notice (BPN) by the local planning authority for the succeeding five years.
Such a certificate may be sought by developers of a building or site in order to establish certainty that the project is viable.
The certificate is defined by Section 6 of the Planning (Listed Buildings and Conservation Areas) Act 1990.
Certificates do not prevent the creation or extension of a conservation area to include the building.
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