Just 44 miles from central London, there is a private island retreat. 400 acres of idyllic surroundings, lush green fields and beautiful wild beaches. A registered bird sanctuary, it is the only place in the UK that has 5 different species of owl living together. A designated place of natural beauty, a recognised place of scientific interest…..
Welcome to The Causeway Retreat on Osea Island.
A private mental health and addiction rehabilitation facility. And this is just building on the legacy of Osea Island. It has a history of helping people, it was also the site of the world’s first treatment centre from 1903 – 1917 when it was owned by Frederick Charrington of the Brewery family.
Comprising of 22 properties, accommodation is provided in the Manor House, in Cottages or at the Village.
The luxurious New England style Manor House and Manor Beach Houses provide clients with a private and tranquil haven complimented by a style and ambience often aspired to but rarely found. Our bespoke programs are geared toward individuals whose professional and working needs are a priority.
The Cottages are an extension of the bespoke services offered at the Manor House and provide complete privacy for individuals or couples who require discreet accommodation. It is in one of these that people will stay if they want to bring their pets with them. At The Causeway Retreat we are happy to accept pets, they are often an integral part of someone’s recovery.
The Village accommodation is a combination of individual bedrooms or apartments in a picturesque setting some of which date back to the 16th century. Every client has his own bedroom – no sharing as with other treatment facilities – and all beds are big and comfortable, king or double.

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