An appurtenance is an appendage or attachment to something.

That geegaw is just another unnecessary appurtenance.

An appurtenant is an appendage or attachment to something.

No. A right or restriction which goes with that property is considered an appurtenance such as an access easement.

Most real estate law defines an appurtenance as any item or attachment which is normally installed or attached by a specialist, such as carpeting, electrical wiring or plumbing. If an item is an appurtenance, it is part of the structure. Most real estate law defines an appurtenance as any item or attachment which is normally installed or attached by a specialist, such as carpeting, electrical wiring or plumbing. If an item is an appurtenance, it is part of the structure.