The valley here is a sand-filled corridor running between two coastlines, and that fill is the reason boreholes and wellpoints work at all. Properties on the valley floor and properties on the mountain sides are entirely different propositions.
The valley's shape is also the reason salinity deserves attention: there is sea at both ends.
What Is Under Fish Hoek
| Formation | Where it sits | What it means for drilling |
|---|---|---|
| Valley sand deposits | The flat valley floor between Fish Hoek and Noordhoek | Unconsolidated sand of appreciable depth with a shallow water table. Wellpoints work here, and boreholes need screening and a gravel pack rather than open hole in rock. |
| Cape Granite Suite | The Peninsula batholith on the valley sides and rising ground | Weathered mantle and jointing. Properties on the slopes reach rock quickly and revert to fracture-dependent yields. |
| Table Mountain Group sandstone | The higher mountain ground on both sides | Hard fractured rock, and the recharge source for the valley below. |
Send your street and what the water is for, and get an itemised quote for Fish Hoek.
Get a Fish Hoek Borehole QuoteWhat That Means for Your Borehole
- Valley-floor properties have real options, including a wellpoint for garden use at a fraction of borehole cost.
- Hillside properties do not. Granite close to surface means a drilled borehole and fracture-dependent yield.
- Salinity belongs in every analysis here, with False Bay at one end of the valley and the Atlantic at the other.
- Boreholes in the sand need proper screening and a gravel pack, or you will be pumping sand and replacing impellers.
Where We Work Around Fish Hoek
- Fish Hoek valley floor and the central residential areas
- Clovelly and the Silvermine river side
- Sun Valley and Capri
- Noordhoek approaches and the valley's western end
- Kommetjie side smallholdings
- Glencairn and the slopes toward Simon's Town
- Hillside properties on both valley walls
What to Watch For Here
Two coastlines, one valley. Salinity is a realistic possibility across the valley fill, and heavy abstraction can worsen it. Measure electrical conductivity, chloride and sodium before committing to any use beyond garden irrigation.
Sand management is not optional. A borehole into unconsolidated sand needs screening matched to the formation and a properly placed gravel pack. Skimping there produces a borehole that pumps sand indefinitely, wears out pumps and gradually fills itself in.
What the Water Is Used For
- Garden and lawn irrigation on valley properties
- Pool top-up, subject to iron and salinity testing
- Toilet flushing and laundry on separated plumbing
- Smallholding irrigation toward Noordhoek and Kommetjie
- Communal landscaping on complexes and estates
- Standby supply during municipal interruptions
Wellpoint or Borehole?
Genuinely viable on the valley floor, where sand depth and a shallow water table suit a driven or jetted point. This is the cheap option and for garden irrigation it is often sufficient. On the valley sides and hillside properties it is not an option at all, because granite sits close to surface. Neighbours' experience is a reasonable guide on the valley floor, since the sand aquifer is relatively continuous, but it tells you nothing if you are on the slope.
Registration and Abstraction
Boreholes and wellpoints here must be registered with the City of Cape Town. Separately, the National Water Act governs how much you may abstract: reasonable domestic use and small-scale garden watering generally fall under Schedule 1, while larger abstraction may require registration or a water use authorisation from the Department of Water and Sanitation. Requirements change, so confirm your position before drilling.
Related Services
For the drilling process itself, the geology across the wider metro and how a quote is put together, see Borehole Drilling Cape Town.
Borehole Prices in This Area
Drilling is charged per metre, so depth drives the total. The ranges below are framed for local ground conditions and access.
| Item | Indicative range | What moves it locally |
|---|---|---|
| Drilling, per metre | R400 - R950 /m | Valley sand drills quickly; hillside granite does not. Which you are on changes the rate. |
| uPVC casing, installed, per metre | R400 - R700 /m | Diameter and class. Weathered-zone thickness is not known until drilling starts. |
| Mobilisation and site establishment | R2,500 - R9,000 | Valley access is easy. Screening and gravel pack are essential in the sand and should be itemised. |
| Water survey | R5,000 - R12,000 | Targets structure rather than depth. Worth most where yield is fracture-dependent. |
| Yield testing | R3,500 - R15,000 | Establishes the sustainable rate that pump selection depends on. |
| Pump, supplied and installed | R15,000 - R45,000 | Greater depth means more head, which means a larger pump and heavier cable. |
| Storage and booster | R12,000 - R35,000 | Needed wherever peak demand exceeds the borehole's sustainable rate. |
| Wellpoint alternative | R6,500 - R10,000 | Where sand depth and a shallow water table allow it, this covers garden irrigation for a fraction of the cost. |
| Typical complete project | R55,000 - R160,000+ | Everything above, excluding treatment, which depends entirely on the water analysis. |
These are indicative ranges, not a quotation. They are compiled from published South African supplier and contractor pricing to give you a starting point for budgeting. They are not our rate card, and no figure here is a commitment.
Treat them as a broad guide only. Published borehole pricing in South Africa varies enormously - different 2026 guides quote per-metre drilling rates for the same province that differ by a factor of three - because depth, geology, access, specification, distance and fuel costs all move the number. Depth in particular is not known until the hole is finished. Figures generally exclude VAT unless noted, and change over time. Only an itemised written quote against your actual site means anything.
Fish Hoek Borehole FAQs
Can I put in a wellpoint in Fish Hoek?
On the valley floor, usually yes. The sand fill and shallow water table are what wellpoints are designed for, and for garden irrigation a point is often all that is needed at a small fraction of borehole cost.
On the valley sides and hillside properties it is not viable, because granite sits close to surface with nothing for a point to penetrate.
Is the water salty in the valley?
It can be, and the valley's geography is the reason - there is sea at both ends of it. Raised chloride, sodium and electrical conductivity are realistic across the fill.
Measure before committing to anything beyond garden irrigation, and operate within a tested sustainable rate rather than pumping hard, since heavy abstraction can worsen it.
Why is my borehole pumping sand?
In unconsolidated valley sand this almost always traces to construction: screening not matched to the formation, an inadequate or missing gravel pack, or a borehole that was never properly developed.
Filtration protects the pump but does not fix the cause, and the borehole will keep filling itself in. See rehabilitation.
Does my neighbour's borehole tell me what mine will do?
On the valley floor, reasonably well. A sand aquifer is relatively continuous, so a neighbour's depth, yield and water quality are a fair guide.
On the hillsides it tells you very little, because granite yields depend on intersecting specific fractures that do not extend uniformly across property boundaries.
Do I need to register the borehole?
Yes. Fish Hoek falls within the City of Cape Town, so boreholes and wellpoints must be registered with the City.
Abstraction beyond reasonable domestic use may additionally require registration or authorisation from DWS under the National Water Act.
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