Core drilling prices in the UK vary significantly by application, material, access, and whether you are hiring equipment to do the work yourself or engaging a specialist contractor. A domestic boiler flue hole can be completed with hire equipment for under £60 all-in. The same hole drilled by a contractor includes a minimum call-out charge, typically £150–£250 for a domestic visit covering one to three holes. For structural concrete in a commercial building, the day rate for a drilling contractor with the correct rig and scanning equipment runs to £600–£1,000.
The main cost driver is not the drilling itself — it is the equipment specification and the pre-work requirements: whether scanning is needed, whether wet coring equipment must be mobilised, and whether a CDM-notifiable project requires formal documentation and controlled slurry disposal.
Core Drilling Costs at a Glance
- DIY hire: £25–£45/day (machine) + £5–£15 per bit — typically £35–£60 all-in per visit
- Domestic contractor call-out (1–3 holes): £150–£350 depending on location and material
- Per-hole rate (multiple holes, same visit): £50–£120 per hole
- Commercial contractor day rate: £400–£800 (dry coring) — £600–£1,000 (wet / structural)
- GPR scanning (pre-drilling): £200–£400 as a standalone service; often included in commercial rates
- London and South East: typically 20–40% above national rates
How Much Does a Professional Contractor Charge for Core Drilling?
UK diamond core drilling contractors typically price on one of three structures:
Minimum Call-Out (Domestic)
Most contractors set a minimum visit charge that covers mobilisation, set-up, and the first one to three holes in standard brick or block. Domestic minimum call-outs typically run £150–£250 in the Midlands and North, and £200–£350 in London and the South East. This is the realistic cost for a single boiler flue hole, extractor fan penetration, or waste pipe entry through a standard cavity wall.
Per-Hole Rate
Where a contractor is drilling multiple holes on the same visit, pricing often moves to a per-hole rate after the minimum is met. In standard masonry, expect £50–£100 per additional hole at 107mm or below. For 150mm and above in brick, or any diameter in structural concrete, per-hole rates rise to £80–£150 and above.
Day Rate
Commercial and multi-trade jobs are priced on day rate — see commercial core drilling services for what a full commercial programme involves. Rates vary by equipment level:
- Dry core drilling (brick and block, domestic scale): £400–£550 per day
- Wet core drilling (concrete, medium commercial): £550–£750 per day
- Rig-mounted wet coring (structural concrete, large diameter): £700–£1,000+ per day
Day rates generally include the operative, one machine, standard bits to 117mm, and travel within a normal working radius. Specialist bits, extension rods, and additional equipment (GPR scanner, slurry vacuum) may be charged separately.
Core Drilling Cost by Application Type
| Application | Bit Size | DIY Hire Cost | Contractor Cost |
|---|---|---|---|
| Boiler flue (domestic) | 107mm or 117mm | £40–£60 | £150–£280 |
| Extractor fan (domestic) | 107mm or 125mm | £40–£60 | £150–£250 |
| Soil stack penetration | 117mm or 127mm | £45–£65 | £150–£280 |
| Cable entry (EV charger) | 38mm | £35–£50 | £120–£200 |
| Commercial HVAC penetration | 150–200mm | Not practical DIY | £250–£500 per hole |
| Structural concrete (with scanning) | Any | Not appropriate | £600–£1,200+ per day |
Prices are indicative UK averages (2026). Actual quotes depend on location, access, and specific material conditions. Always request a site-specific quote for structural or commercial work.
What Factors Affect Core Drilling Costs?
The following factors drive quotes above or below typical rates:
Material Hardness
Standard brick and aerated block are the fastest and cheapest materials to core drill — a competent operative with the right equipment drills a 107mm hole in under two minutes. Dense concrete and reinforced concrete require wet coring, lower RPM, and rebar-rated bits. Drilling time can be 10× longer, which is reflected in per-hole pricing. See the reinforced concrete drilling guide for what the work involves.
Pre-Work Scanning
Any structural concrete penetration requires GPR or ferroscan survey before drilling — to locate rebar, post-tension cables, and embedded services. GPR scanning as a standalone service costs £200–£400 for a domestic or small commercial visit. Many specialist contractors include scanning in their structural drilling day rate; others charge separately. Never allow drilling into structural concrete without prior scanning — the cost of a severed post-tension cable is many times higher than the scanning fee.
Access and Location
Overhead drilling, restricted-access sites, and multi-storey buildings add to the cost due to extended set-up time, additional equipment, and health and safety requirements. Expect a 15–30% uplift on standard rates for overhead or high-level work. London and the South East typically command 20–40% above Midlands and Northern rates due to travel, parking, and overheads.
Hole Depth and Extensions
Standard diamond core bits drill to 150mm depth. Cavity walls and insulated panels exceeding 150mm require extension rods, adding set-up time and — in harder materials — reduced penetration rate due to increased flex in the cutting assembly.
CDM and Compliance Requirements
On CDM-notifiable commercial sites, contractors must maintain COSHH risk assessments, PPE records, and method statements. Wet coring produces alkaline slurry that cannot be discharged to drainage — slurry vacuum hire and controlled waste disposal adds cost. These regulatory compliance requirements are why commercial drilling rates are significantly higher than domestic. See the safety guide, dust extraction guide, and health and safety in diamond core drilling for what the requirements cover.
Is It Cheaper to DIY or Use a Contractor?
For a single domestic hole in brick or block — a boiler flue, extractor fan, or soil stack entry — hiring the equipment and doing it yourself is almost always cheaper than engaging a contractor. See: residential core drilling guide for the full domestic drilling overview including bit sizes and dust control requirements.
- Hire cost: £35–£60 all-in (machine + bit, one day)
- Contractor minimum: £150–£280
- Saving: £90–£220 per single hole
The calculus changes with volume and complexity. For three or more holes in the same location, or any work in concrete, the contractor's efficiency and equipment advantage reduces the gap. For structural concrete, CDM-notifiable projects, or any work requiring GPR scanning, a specialist contractor is not optional — and attempting it with hire equipment is both dangerous and likely to produce an unusable result.
The diamond core drill hire vs buy guide covers the full break-even analysis for trade professionals who drill regularly.
Does Core Drilling Cost More in London?
Yes — consistently. London and South East contractors carry higher operating costs: congestion charges, parking permits, higher labour costs, and in many cases ULEZ compliance for their vehicles. Expect quotes 20–40% above equivalent Midlands or Northern rates for the same work. This premium applies to both domestic call-outs and commercial day rates.
For multi-hole commercial projects, it is worth obtaining quotes from contractors outside London who travel to site — the travel cost may be offset by the lower base rate, particularly for large-volume structural drilling projects.
