The direct answer
Start with the complete system, not one product or headline rate.
A practical guide to front-garden paving, permeable construction, highway runoff, thresholds and surface-water routes for Surrey driveways. A dependable plan connects the site evidence, approvals, access, installation sequence and finished reinstatement.
Planning and drainage are connected
For front gardens, the planning position can depend on whether water drains to a permeable area within the property or the surface is constructed to be permeable. The actual solution must also protect the home and highway.
Measure the complete catchment
The driveway may receive water from paths, roofs, neighbouring levels or an uphill section. Survey the entire contributing area instead of sizing drainage from the new paving alone.
Thresholds set the critical levels
Garage and entrance thresholds, damp-proof courses and pavement edges define the available fall. Channels only work when their outlet, capacity and maintenance access are resolved.
Permeable paving needs a compatible build-up
A permeable surface is not created by leaving wider joints over an impermeable base. The sub-base, bedding, restraints and underlying ground must work as a designed system.
Do not assume a soakaway will work
Safe siting, infiltration, groundwater and available space need checking. Where infiltration is unsuitable, a competent drainage design may need attenuation or another approved route.
Keep runoff within the property
The finished levels should prevent uncontrolled water reaching the pavement, carriageway or neighbouring land. Confirm the route during design and again before the final surface is laid.
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