
We work in the London Boroughs of Hillingdon and Hounslow, in East Berkshire with a focus on Slough & Reading and across the Colne Valley Regional Park (and its 9 local authorities1). We also work in Spelthorne, Buckinghamshire, Wokingham and the Royal Borough of Windsor & Maidenhead.
Our support area now includes all the historic countries of Berkshire, Buckinghamshire and Oxfordshire plus Bracknell Forest.
The map below illustrates our charitable operating area.

On a project-by-project basis, we also work in other areas of the South East and London and work with other Groundwork Trusts and partners to deliver regional and national improvement programmes.
Groundwork Thames Valley is highly experienced in the challenges of working across geographical boundaries. Land ownership, the political agenda, government targets and different responsibilities can all present issues.
Follow this link to find out how our cross-regional programmes help to address root causes of deprivation and tackle issues by encouraging sustainable improvements across administrative boundaries.
1Since 1987 we have supported the Colne Valley Partnership and the local authority owned areas of the Park of South Bucks District Council, Bucks County Council, Three Rivers District Council, Chiltern District Council, Spelthorne Borough Council, Slough Borough Council and the Royal Borough of Windsor and Maidenhead.