The ground
Winter Hill Gravel · London Clay · Lambeth Group
Tilehurst’s centre is mapped on London Clay capped by Winter Hill Gravel, which the British Geological Survey describes as variably clayey and sandy gravel. Within half a kilometre, bare London Clay is mapped to the south and south-east, and Lambeth Group clays and sands to the west and north.
Where the gravel is thin or absent, expect heavy clay: it drains slowly, is easily compacted when wet and bakes hard in summer. Ground can vary from one garden to the next, so the garden next door may behave quite differently.
Planning
Reading Borough · West Berkshire
Tilehurst’s centre is in Reading’s Tilehurst ward, so Reading Borough Council handles planning there; the western edge of Tilehurst is a civil parish under West Berkshire Council. The national permitted-development rules for householders apply in both.
No conservation area or National Landscape covers the centre (the Routh Lane conservation area is about 0.8 km away), so keep a new fence, wall or gate to two metres (one metre where it’s next to a road) and planning permission usually isn’t needed. In a front garden, new paving covering more than five square metres has to be permeable — or drain to a lawn or border — to stay within permitted development.