It lies close to junction 28 of the M4 motorway connecting London and West Wales.

It formerly formed part of the original 16th century estate of the Morgan family, first substantially redeveloped by William Morgan (of Machen and Tredegar) in the 17th century and owned for generations by the Lords Tredegar.

[5] The present day community (parish) of Tredegar Park is a much smaller area consisting of the Duffryn estate and immediate surroundings.

Parkrun (a UK-wide running series) takes place in the grounds of the park each Saturday at 9am.

[8] As a condition of their management, the grounds and gardens of the house are to remain free for the public to access, with the House entry at £10.10 for adults as part of the Trust's costs to manage their estates.