Cosham is characterised by Victorian terraces around the high street with interwar semis further out, close to Queen Alexandra Hospital, which shapes how Permeable & SuDS Driveways gets specified here: a permeable resin, open-jointed block, or gravel-and-grid build-up that lets rainwater drain through rather than run off. The typical job in Cosham itself deals with steady through-traffic and hospital-visitor parking pressure on streets near the QA Hospital. It suits front gardens over 5m² and sites with limited natural fall for surface water, and it is worth knowing that 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 Cosham
Cosham sits at the foot of Portsdown Hill, where the free-draining chalk ground is a genuine practical advantage over the low island ground further south. Victorian terraces line the streets around the high street, giving way to interwar semis further out, and steady through-traffic plus hospital-visitor parking near Queen Alexandra Hospital keeps on-street pressure high on the surrounding roads.