Driveway & Garden DrainageSoakaways, Channels & French DrainsAcross Bucks & Surrey
ACO channel drains, soakaway crates and French drain systems designed and installed alongside driveways, patios and gardens, SuDS-compliant, correctly sized, and guaranteed for 12 months.
About Our Drainage Service
What it is
Drainage is the system of channels, gullies, pipes and soakaways that moves surface water off paved and planted areas to somewhere it can safely dissipate. Done properly, water is captured at the low point, piped to a correctly sized soakaway, and gone. Done badly, it pools against your house.
Who it's for
Anyone installing a new driveway or patio (SuDS regs almost always apply), homeowners with a boggy lawn or a garden that floods after rain, and property owners across Bucks and Surrey dealing with water tracking into garages, sheds or the house itself.
When you need it
You need drainage when water pools on your driveway or patio, when your lawn is squelchy for days after rain, when a garage or outbuilding takes water at the base, or when planning rules require a soakaway as part of a new driveway install.
Why professional installation matters
Drainage is invisible until it fails, and then it's catastrophic. Undersized soakaways fill and back up within a season. ACO channels laid without fall don't move water. Land drains without stone surround silt up in a year. We size, fall and install every element to Building Regs / SuDS spec, first time.
What Happens If You Leave It
Small problems don't stay small. Here's what we see when homeowners delay, and the corner-cutting mistakes that make it worse.
Water pooling against the house
Poor drainage sends surface water toward foundations, DPCs and cellar walls. Once it gets in, damp treatment and repair costs are into the thousands.
Soakaway backflow and blowout
An undersized soakaway floods after every heavy shower, then backs up through the ACO channels and floods the driveway from the drain end.
Bog-lawn and rotting fence posts
Poor sub-soil drainage keeps the lawn saturated for days, rots fence post bases, kills grass and turns everything into mud.
Our Drainage Process
A clear, in-person system from first visit to final handover, no surprises, no scope creep.
- 1
In-person site survey
We identify low points, existing drainage runs, soakaway locations and highway/foul connections. Test soil percolation where a soakaway is planned.
- 2
Fixed written quote, same day
Itemised for excavation, pipework, crates/rubble, channels, gullies, membrane and connections. No mystery figures.
- 3
Excavation & pipework
Trenches dug to correct fall (minimum 1:80 on surface water), 110mm SDR-11 pipework laid on a granular bed, jointed and pressure-checked.
- 4
Soakaway or connection
Modular soakaway crates installed at correct depth, wrapped in geotextile, backfilled with drainage stone. Or connections made cleanly to existing surface water systems.
- 5
Reinstatement & handover
Ground reinstated, ACO channels bedded flush and gullies levelled. Test with hose to confirm flow. 12-month workmanship guarantee starts.
Why Homeowners Choose Hi Design
Dry driveways and patios
Surface water goes where it should, into the ground safely, not against your house or across your paving.
SuDS compliant, planning safe
Correctly sized soakaways keep new driveways inside Permitted Development rules, no planning application required.
Solved, not seasonal
A properly designed soakaway lasts 30+ years without attention. Blocked gullies and bog-lawns become a one-time fix, not an annual problem.
Drainage: The Detail
Channel drains, gullies and linear systems
ACO HexDrain, Multiline and Q-Max channels installed across driveways at low points, garage entries and threshold drops. Channels bedded on a concrete haunch with 1:80 fall to the outlet, connected via 110mm SDR-11 pipe to the soakaway. Cast-iron or galvanised gratings for domestic loads; ductile iron D400 for commercial and vehicle-crossed points.
Soakaway sizing and construction
Soakaway volume is sized against roof/paved catchment area and local percolation rate, typically 1m³ of storage per 20m² of impermeable area on average Bucks soil. Standard build is modular crates (Aquacell, Rainstore3) wrapped in a geotextile membrane, backfilled with 20–40mm clean stone. Located minimum 5m from any building and downhill of foundations. BRE Digest 365 compliant.
French drains and land drainage
For waterlogged lawns and gardens we install French drain runs: 300–450mm wide trenches with a perforated 100mm land drain pipe bedded in 20mm shingle, wrapped in a geotextile membrane and backfilled with more shingle to within 100mm of the surface, topped with topsoil. Runs typically at 3–5m spacing on heavy clay, all falling to a discharge point or soakaway.
Permeable driveway construction
The alternative to a soakaway is a fully permeable driveway construction, Priora block paving or resin bound over an open-graded Type 3 sub-base. Water drains vertically through the surface into the sub-base, which acts as an attenuation layer. Ideal for SuDS compliance on new driveways without space for a separate soakaway.
Residential vs commercial
Residential: 110mm SDR-11 pipework, modular crate soakaways, HexDrain-grade channels. Commercial: heavier-grade SDR-9 pipework, larger attenuation tanks, D400 grating throughout, silt traps and interceptors. We install both, and coordinate with drainage engineers on larger schemes.
Drainage, Common Questions
Related services & areas
Solve The Water Problem, Properly
Free in-person survey with percolation check. Fixed written quote same day. 12-month guarantee.
Free site visit · Fixed written quote same day · 0% deposit · £10m insured