Understanding the borehole drilling process removes uncertainty and helps you hold contractors accountable. This guide breaks the entire process into 7 clear steps, from the initial geophysical survey through to final commissioning and handover. Whether you're drilling in Sandton's granite or Benoni's shale, the fundamental process is the same.
Process Overview: Survey to Water in 2–6 Weeks
A residential borehole project typically takes 2–6 weeks from the initial survey to flowing water. The timeline depends primarily on permit requirements, contractor availability, and geological complexity. Here's the full picture:
| Step | Activity | Duration | Cost Range |
|---|---|---|---|
| 1 | Geophysical Survey & Site Assessment | 1 day | R5,000–R10,000 |
| 2 | Permits & Registration | 1–2 weeks | R0–R2,000 |
| 3 | Rig Mobilisation & Site Preparation | 1 day | R2,000–R5,000 (transport) |
| 4 | Drilling | 1–3 days | R500–R1,500 per meter |
| 5 | Yield Testing & Water Quality Analysis | 24–48 hours | R3,000–R8,000 |
| 6 | Equipment Installation | 1–2 days | R25,000–R60,000 |
| 7 | Connection, Handover & Commissioning | 1 day | R5,000–R15,000 |
| Total Project | 2–6 weeks | R75,000–R200,000 | |
For detailed costs by suburb and geology, see our Gauteng suburb pricing guide or the national cost guide.
Step 1: Geophysical Survey & Site Assessment
A hydrogeologist uses electromagnetic or resistivity equipment to map underground water-bearing fractures. This is the most critical step — it determines where to drill and gives you an expected depth and yield estimate. A good survey dramatically improves the chances of a successful borehole (85–95% success rate vs. 50–60% without).
💡 Tips
- Always insist on a geophysical survey before drilling — never let a contractor drill "by feel"
- Ask the surveyor for a written report with recommended drill point, expected depth, and anticipated yield
- Surveys identify multiple potential drill sites, so you have a backup if the primary site underperforms
Step 2: Permits & Registration
If your borehole use exceeds Schedule 1 limits (domestic household only), you need registration with the Department of Water and Sanitation (DWS). Some municipalities also require local permits. Your contractor should handle this paperwork, but it can add 1–2 weeks to the timeline.
💡 Tips
- Ask your contractor if they handle permits — reputable companies include this in their service
- Keep the registration certificate safe — you'll need it if you ever sell your property
- For residential use under 10,000 litres/day, registration is recommended but not strictly enforced
Step 3: Rig Mobilisation & Site Preparation
The drilling rig (a large truck-mounted unit) is transported to your property and positioned at the survey-recommended drill point. Access roads need to accommodate a heavy vehicle, and the area around the drill point must be cleared. This typically happens the morning of drilling day.
💡 Tips
- Ensure there's vehicle access for a large truck — gates of at least 3m wide and firm ground
- Clear a 5m radius around the drill point of any obstacles, plants, or garden furniture
- Inform your neighbours — drilling rigs are loud and the work runs all day
Step 4: Drilling
The core of the operation. Three main drilling methods are used: percussion (hammer) drilling for hard rock like granite, rotary drilling for softer formations, and Odex drilling for unstable or dolomitic ground. The rig drills through earth and rock until it reaches the water-bearing fracture zone identified by the survey.
💡 Tips
- Expect significant noise, dust, and water discharge during drilling — this is normal
- The driller will note water strikes (depth where water enters the borehole) as they go
- Hard granite areas typically take longer (and cost more per meter) than softer shale or sandstone
- Ask for a drilling log — this records all geological layers encountered and water strike depths
Step 5: Yield Testing & Water Quality Analysis
After drilling, a pump test is conducted to determine the borehole's sustainable yield (how much water it can produce consistently). This involves pumping water out at increasing rates and monitoring recovery. A water sample is also sent to a laboratory for chemical and microbiological analysis to ensure safety for the intended use.
💡 Tips
- Insist on a minimum 24-hour pump test — shorter tests may overestimate sustainable yield
- Request a full SANS 241 water quality test if you plan to drink the water
- Yield is measured in litres per second (l/s) — 0.5 l/s is sufficient for most residential homes
- Keep the test results — you'll need them to specify the right pump size
Step 6: Equipment Installation
Based on yield test results and your water requirements, the contractor installs the casing (steel or PVC pipes that line the borehole), submersible pump, rising main (pipe to surface), electrical connections, pressure tank, and any filtration equipment. A concrete collar is placed around the borehole head for sanitary protection.
💡 Tips
- Pump size must match yield — an oversized pump can damage the borehole aquifer over time
- Ask for stainless steel casing below the water table for longevity (adds R50–R100/m)
- Ensure the borehole cap is lockable and sealed against contamination
- Request a schematic showing all installed components and their depths
Step 7: Connection, Handover & Commissioning
The borehole is connected to your garden irrigation system, storage tank, or household plumbing (or a combination). The contractor should commission the system, test all connections, and walk you through operation and basic maintenance. You receive a complete handover pack including the drilling log, yield test results, water quality report, and equipment warranties.
💡 Tips
- Get the handover pack in writing — you'll need these documents for property transfers
- Test every endpoint (taps, sprinklers, tank filling) before signing off
- Schedule a follow-up maintenance visit for 6 months after installation
- Ask about warranty terms — reputable companies offer 1–2 years on workmanship and 3–5 years on pumps
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Common Delays & How to Avoid Them
Most borehole projects run smoothly, but certain issues can add days or weeks. Here are the most common delays and how to prevent them:
Hitting harder rock than expected slows drilling and may require switching to percussion. Prevention: Always get a geophysical survey first.
Municipal permits can take 1–3 weeks in some areas. Prevention: Start paperwork before scheduling the drill date.
Low-hanging cables, narrow gates, or soft ground can block rig access. Prevention: Do a site walkthrough with the contractor before drill day.
Heavy rain can make sites inaccessible or unsafe for drilling. Prevention: Schedule during Gauteng's drier months (May–September) if possible.
Pump or casing supply shortages can delay installation by 1–2 weeks. Prevention: Ask your contractor to confirm stock before scheduling.
Hitting buried pipes, cables, or old foundations requires repositioning. Prevention: Check service plans with your municipality before drilling.
Frequently Asked Questions
How long does it take to drill a borehole?
The actual drilling typically takes 1–3 days depending on depth and geology. However, the full process from initial survey to handover takes 2–6 weeks, including permit applications, survey scheduling, and equipment installation.
What happens if no water is found?
A dry borehole is uncommon when a proper geophysical survey is done first (85–95% success rate). If no water is found, most contractors charge only for drilling — you won't pay for pump and equipment. Some offer "no water, no pay" guarantees, though these typically come at higher per-meter rates.
Do I need a permit to drill a borehole?
South African law requires registration with the Department of Water and Sanitation (DWS) for use beyond basic household needs. For residential use under 10,000 litres/day, registration is recommended but not strictly enforced. Your drilling contractor typically handles the paperwork.
Can I drill anywhere on my property?
Not exactly. The borehole must be at least 50m from any septic tank, 10m from boundaries, and clear of underground services. The geophysical survey identifies the optimal location based on subsurface water fractures.
Is drilling noisy?
Yes. Percussion drilling in granite can reach 80–90 decibels (similar to a lawnmower). Drilling runs 8–10 hours per day. Inform your neighbours in advance — most contractors provide a timeline so everyone knows what to expect.
How deep will my borehole be?
Depth depends entirely on your suburb's geology. Shallow areas like Benoni may only need 20–40m, while granite areas like Sandton often require 60–100m. A geophysical survey provides the best depth estimate before drilling.
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