Borehole Drilling
Randburg

Randburg lies on the granite dome, with small remnants of older greenstone recorded toward Linden. Most holes pass through weathered rock first and then look for water in fractures in the harder granite below.

Randburg is a patchwork of older established suburbs, including Ferndale, Blairgowrie, Bordeaux, Robindale and Windsor, around the Randburg CBD. Mid-sized stands, mature trees and older houses with extensions are typical, and many owners want a supply that keeps the garden alive through water restrictions.

What Is Under Randburg

Formation	Where it sits	What it means for drilling
Granite-gneiss basement	Beneath the weathered layer across the suburb and the wider northern suburbs	Close to watertight where it is unbroken. Yield comes from open fractures and joints, and two positions a stand apart can behave very differently.
Weathered granite mantle	Between the topsoil and fresh rock, thickest on the gentler ground	Soft, collapsing material that is always cased through. The transition at its base is often where the first water is struck.
Dolerite and diabase intrusions	Thin sheets and dykes crossing the dome	The intrusion itself yields little, but the broken contact zone alongside it is often the most productive ground on the property.

What That Means for Your Borehole

• Siting targets fractures and dyke contacts because unbroken granite carries almost no water.
• The upper section drills fast and the fresh rock slowly so the total time depends on where one becomes the other.
• Granite water is usually soft and of good quality though nearby septic tanks and soakaways are worth keeping well clear of.

Where We Work Around Randburg

• Ferndale and Blairgowrie
• Bordeaux
• Linden
• Robindale
• Windsor East and West
• Fontainebleau
• Randburg CBD

What to Watch For Here

Older homes may have forgotten septic systems or wells. Some older Randburg houses once relied on septic tanks or private wells before sewer connections were laid. These can affect both water quality and where a new hole should go, so asking about the property's history and looking for old manholes or covers is a sensible first step.

Greenstone pockets can change conditions near Linden. The granite on Randburg's western side contains small remnants of older greenstone around Linden. These darker schist rocks can behave differently under the bit and in how they hold water, so expectations about drilling speed and yield should stay flexible on stands in that direction.

What the Water Is Used For

• Watering mid-sized gardens in older Randburg suburbs
• Standby supply when Randburg reservoirs run low
• Filling pools and fishponds through the dry season
• Irrigating vegetable gardens, fruit trees and herb beds
• Washing cars, caravans and long driveways

Wellpoint or Borehole?

Seldom viable. A wellpoint needs loose, permeable sand with water within about seven metres of surface, and weathered granite offers neither on most stands. A borehole is the dependable option.

Approval and Abstraction

Randburg falls under the City of Johannesburg. Both main metros require approval before drilling. The City of Johannesburg requires an application to its Environment and Infrastructure Services Department, and an approved application comes with a drilling certificate that has to be kept on site while the rig works; drilling without one risks a fine and impoundment of equipment. The City of Ekurhuleni requires authorisation, with applications reviewed by its Dolomite Section and by Water Demand Management. Elsewhere, including Mogale City, confirm the municipality's current requirements. Separately, the National Water Act governs how much you may abstract: reasonable domestic use generally falls under Schedule 1, and in 2026 the Department of Water and Sanitation confirmed that households using borehole water for reasonable domestic purposes do not need to register nationally. Commercial, agricultural and larger abstraction may need registration or a water use authorisation. Rules change, so confirm the current position before drilling.

Related Services

For the drilling process itself, the geology across the wider area and how a quote is put together, see Borehole Drilling Johannesburg.

Nearby Areas

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	R450 - R1,100 /m	Decomposed granite drills quickly; fresh granite is slow and wears bits. The split between the two on your stand sets where the cost lands.
uPVC casing, installed, per metre	R400 - R700 /m	The depth of decomposed granite decides how much casing is needed, and it changes across short distances.
Mobilisation and site establishment	R2,500 - R9,000	Access and site conditions move this; a site visit settles it before quoting.
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.
Typical complete project	R60,000 - R180,000+	Everything above, excluding treatment, which depends entirely on the water analysis.

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