The short answer
There is no single right fix — it depends on why your garden holds water. A french drain (gravel trench with perforated pipe) intercepts water moving across or through the ground and is typically £25–£60 per metre. A wider land-drain network suits flat, wet plots and runs roughly £20–£50 per metre. A soakaway gives that collected water somewhere to disperse and typically costs £600–£3,000. A channel drain handles surface water off paths and patios cheaply, while aerating or regrading a compacted, boggy lawn can be enough on its own at £300–£1,500. The right answer balances the cause, your soil, the levels and where the water can go.
The fix that works depends on why the garden floods — surface water, a high water table, compacted clay or poor levels each call for a different answer. Here is how the main options compare.
At a glance
- French drainintercepts moving water, ~£25–£60/m
- Land-drain networkflat wet plots, ~£20–£50/m
- Soakawaydisperses water, £600–£3,000
- Channel drainsurface water off paving
- Aerate / regradecompacted lawns, £300–£1,500
How the solutions compare
A french drain is the go-to where water moves across or through the ground and needs intercepting. A land-drain network — several perforated runs across a plot — suits flat, persistently wet gardens where water sits everywhere rather than running to one spot. A soakaway rarely works alone; it is usually the destination a french or land drain feeds, dispersing water into deeper, free-draining ground. A channel drain deals cheaply with surface water shedding off a patio or driveway. And where the real problem is a compacted, poorly graded lawn, aeration and regrading can solve it without major excavation.
| Solution | Best for | Typical cost |
|---|---|---|
| French drain | water moving across/through ground | £25–£60 / m |
| Land-drain network | flat, persistently wet plots | £20–£50 / m |
| Soakaway | destination for collected water | £600–£3,000 |
| Channel drain | surface water off paving | from ~£50 / m fitted |
| Aerate / regrade | compacted or poorly levelled lawns | £300–£1,500 |
General comparison for guidance. Costs depend on ground and access. Sources: trade cost guides.
How to choose for your garden
- Water running onto the lawn from a slope? a french drain to intercept it is usually the fix.
- Whole flat plot sits underwater on clay? a land-drain network feeding a soakaway is more likely.
- Puddles only off the patio or path? a channel drain may be all you need.
- Lawn squelchy but levels look fine? aeration and top-dressing can relieve compaction before you dig anything.
Want help choosing the right fix?
We'll match you with a vetted land drainage specialist who diagnoses why your garden floods and quotes the right solution — french drain, land drains, soakaway or regrading — on a clear specification.
Frequently asked questions
What is the best way to drain a waterlogged garden?
It depends on the cause. A french drain suits water moving across the ground, a land-drain network suits flat clay plots, a soakaway disperses the collected water, and aeration or regrading can fix a compacted lawn. A specialist should diagnose why it floods before choosing.
Do I always need a soakaway?
Not always. A soakaway is the destination collected water is sent to when there's no watercourse or surface-water drain to use. If a suitable outfall already exists, a drain may connect to that instead.
Can aerating my lawn fix waterlogging?
Sometimes. Where the problem is compacted soil or poor levels rather than a high water table, aeration and top-dressing (£300–£1,500) can relieve it without excavation. Where water sits because the ground itself won't drain, you'll usually need drainage.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific garden and ground. They are guidance, not a quotation.