The day to day management of St James Park Estate is administered by St James Park (Long Ditton) Estate Company Limited, which is a limited liability company formed to provide services for the grounds and common parts of St James Park. Each owner of a property whether a house or apartment on St James Park is a shareholder in the Estate Company and has an equal share regardless of the size of their property.

The company is run by a Board of Directors. The Directors give their time on a voluntary basis and are not paid for their services. A shareholder may stand as a Director. As far as possible, the company tries to make sure that there is representation from each part of the estate.

Each flat owner is also a member of a second company the St James Park (Long Ditton) Residents Company Limited which provides services to the communal parts of seven blocks of flats and the lines of communication are the same as the Estate Company. St James Park (Long Ditton) Residents Company Limited prepares budgets for the maintenance of the structures of the seven blocks, decorations internally/externally, weekly cleaning of the communal areas, a building insurance cover (not contents) and maintains a reserve fund.