Most Purbrook properties sit on sloping chalk ground on the northern face of Portsdown Hill, so Permeable & SuDS Driveways here comes down to a permeable resin, open-jointed block, or gravel-and-grid build-up that lets rainwater drain through rather than run off. Purbrook’s own driveways are shaped by sloping plots on the hill, where falls and drainage genuinely need solving before the surface choice. It is best suited to front gardens over 5m² and sites with limited natural fall for surface water, though since October 2008 in England, over 5m² of impermeable surfacing draining to the highway generally needs planning permission — a permeable surface generally does not, though this is general guidance, not a guarantee for any specific property.
About Permeable & SuDS Driveways
Permeable and SuDS (Sustainable Drainage Systems) driveways use a surface and sub-base combination that lets rainwater soak through into the ground or a storage layer beneath, rather than sheeting off the surface toward the highway or a neighbouring property. In practice that means a permeable resin-bound system, block paving laid with open, permeable joints, or a properly built gravel-and-grid system, each sitting over a sub-base designed to hold and disperse water rather than just support weight. This is directly relevant to a genuinely useful planning rule: since October 2008 in England, laying more than 5m² of impermeable hard surfacing in a front garden that drains to the highway requires planning permission, whereas a permeable surface, or one draining to a soakaway or border, generally does not. That is a factual, general planning position — it is not a guarantee that any specific property qualifies, and it does not cover handling or submitting a planning application.
Best suited to: front gardens over 5m², low-lying or flood-plain sites, and anywhere surface water has limited natural fall away from the property
Less suited to: sites where a fully sealed, zero-drainage surface is specifically required for another reason
Ground & property in Purbrook
Purbrook sits on the sloping chalk of Portsdown Hill’s northern face, with an older core lower down giving way to 20th-century estate development climbing the hill. Sloping plots here mean the falls and drainage genuinely need solving before the surface choice, much like the estate streets further down the slope in Waterlooville.