Harrington Park House and Orielton Homestead are two of the most historic houses in NSW, respectively located at the heart of Harrington Park and Harrington Grove. As part of the planning and rezoning of Harrington Grove, Harrington Estates undertook plans to restore both houses.

The full restoration of Harrington Park House has been undertaken and has now been completed.

Meanwhile, restoration of Orielton Homestead is well underway and is expected to take another 12 months. The work is intricate and painstaking, and there have been many special measures implemented in order to protect the delicate materials and fixtures. For example, an on-site joinery shop has been established to recreate the architecture of the past without the unnecessary wear and tear caused by travel. Orielton Homestead is prominent in the Harrington Park locality, being highly visible from The Northern Road.