Egham · TW20 · Surrey
Ponds & Water Features in Egham.
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- Egham, from our Ascot base
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Ponds & Water Features
Egham, TW20
Small wildlife pond
£1,500–£3,000
Up to 5m², liner, planting and shelving
Egham
Ponds & Water Features in Egham, Surrey
What changes here.
A pond in an Egham garden is working with ground that already wants to hold water, which changes the engineering more than the ambition. Where a plot sits close to the Thames, the water table can be high enough for months of the year that a conventional excavation risks groundwater pushing against the liner from below rather than the more familiar problem of a liner losing support in free-draining ground.
Ponds & Water Features ground conditions in Egham
We design the excavation sequence and outfall around Egham's water table rather than treating the pond as an isolated hole in the ground, because groundwater close to the Thames can lift or distort a liner from underneath if that risk is not managed from the start. Further from the river, on the town's higher ground, conditions behave more predictably, and we confirm which situation applies to your specific plot at survey before the pond's depth and position are fixed. Pump and filtration sizing follows the same logic, calculated to the finished volume once the excavation is confirmed rather than estimated in advance from a standard plan, since an undersized filter is the single most common reason a new pond clouds within its first summer on this kind of ground.
Planning and permissions in Egham
A garden pond is ordinary permitted development for most Egham properties under Runnymede Borough Council's rules. The check worth doing early, beyond the usual tree preservation order question on established plots, is how the pond's depth interacts with the local water table — not a planning matter as such, but one that changes the build significantly enough that we confirm it before any design commits to a specific excavation depth.
Pricing guide
Ponds & Water Features costs in Egham.
Ranges, not quotes. Access, levels, drainage and ground conditions move these numbers in both directions, and only the survey settles it. We publish them so you can sanity-check anyone else's figure before you agree to it.
| Material / option | Typical cost | Notes |
|---|---|---|
| Small wildlife pond | £1,500–£3,000 | Up to 5m², liner, planting and shelving |
| Ornamental / koi pond | £4,000–£12,000 | Depth-built, biological filtration and UV |
| Waterfall or cascade feature | £800–£2,500 | Depends on head height and run length |
| Typical pond project (10m²) | £3,000–£6,000 | Full build, pump and filtration included |
Scope of works
Ponds & Water Features — what's included
- Wildlife ponds with shelving and beach margins
- Ornamental and koi ponds with biological filtration
- Pre-formed and flexible liner installations
- Waterfalls, cascades and bubbling urns
- Pumps, filtration and UV clarification sized to volume
- Pond lighting and low-voltage electrics
- Planting schemes for marginal and aquatic plants
- Netting, covers and safety grilles where needed
Ponds & Water Features in Egham FAQs
In Egham, specifically.
Yes, and it is often more straightforward here than in a town where the ground fights against holding water at all — the design task is managing the water table rather than creating drainage from nothing. We build in a positive outfall and plan the excavation sequence around the groundwater level found at survey, rather than treating the pond as an isolated dig.
It changes what the liner needs protecting against. On plots closer to the Thames, groundwater pressure from below is the main risk to manage, which is the reverse of the more common concern on free-draining ground where a liner simply loses support at the edges. We assess which applies to your specific plot at survey and design the bedding and outfall accordingly.
Regularly, and Egham's naturally wetter ground suits a wildlife pond well once the excavation is managed properly. Shelving and a shallow beach edge let birds and hedgehogs use it safely, and we size the build to the water table found at survey rather than a standard specification that assumes drier ground.
By accounting for the water table in the excavation and outfall design from the outset, rather than filling the pond and hoping the liner holds. Where groundwater sits close to the surface for months of the year, an unmanaged dig lets water push up under the liner and distort it — we plan the sequence specifically to prevent that on any Egham plot where the survey finds a high water table.
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Berkshire & Surrey
Ascot, Windsor, Virginia Water, Sunningdale, Wentworth, Egham, Staines & surrounding areas
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Egham · Free survey
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