Like a FREE Geothermal Drilling Quote? – Get in Touch Today! info@gsidrilling.co.uk | 07523 208 711

Gretton Site Investigations Ltd
Gretton Site Investigations Ltd
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  • Boreholes for GSHS
    • Domestic GSHS drilling
    • Commercial GSHS drilling
    • About GSHSs and boreholes
  • Water Well Drilling
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  • Contact Us
  • About Us
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  • More
    • Home
    • Boreholes for GSHS
      • Domestic GSHS drilling
      • Commercial GSHS drilling
      • About GSHSs and boreholes
    • Water Well Drilling
    • Soakaways
    • Dewatering
    • Mini Piling Drilling
    • Contact Us
    • About Us
    • Our Drilling Projects
    • Jobs at GSI
  • Home
  • Boreholes for GSHS
  • Water Well Drilling
  • Soakaways
  • Dewatering
  • Mini Piling Drilling
  • Contact Us
  • About Us
  • Our Drilling Projects
  • Jobs at GSI

Geothermal Borehole Drilling Specialists

Geothermal Borehole Drilling SpecialistsGeothermal Borehole Drilling SpecialistsGeothermal Borehole Drilling Specialists

Commercial and Domestic boreholes drilling services 

for geothermal heat systems, water wells and more...

I'd like a free quote

More than 17 years and 56,162 boreholes later...

Who are we?

GSI are specialists in drilling geothermal boreholes for ground source heating systems (GSHS) and water wells across the UK and Channel Islands. either for domestic or commercial projects.       

Domestic and commercial drilling services

From a single borehole in your back garden to some of the largest Ground Source Heating (GSH) projects in the country, each has had its own unique challenges and individual customer needs.  


That's why the Gretton Site Investigations' team will approach your project with a wealth of experience and know-how. 

Relationships that count

We've developed a reputation for reliability, honesty and building customer relationships that last. Trusted by Bowcliffe Hall near York, where we drilled an incredible 72 boreholes, each 140 metres deep.  


And a well known country-wide retirement home developer; where each site averaged 22, 150 metre deep bore holes taking roughly 4 weeks each. We completed both on time and in budget. 


Want see more? Or do you have a project you'd like to talk through? Call 07523 208 711 or email info@gsidrilling.co.uk  

Find out what we do

Commercial geo-drilling

Commercial geo-drilling

Commercial geo-drilling

We know commercial drilling projects have tight deadlines. With 9 drilling rigs and our experienced team, we've drilled some of the largest projects in the UK to date. On time and within budget.  

Domestic geo-drilling

Commercial geo-drilling

Commercial geo-drilling

Borehole drilling machine

We've drilled domestic geothermal projects across the UK and Channel Islands. From country homes in Gurnsey to basements in central London.

Water well drilling

Commercial geo-drilling

Soakaway installation

Rotary water well drilling, well water gushing out

Many people aren't aware it's even possible to draw their own water. Anyone in the UK is allowed to drill a water well on their private land and take 20,000 litres per day without an extraction licence.


Soakaway installation

Dewatering / ground water control services

Soakaway installation

Soakaways offer another way to drain rainwater, especially where the current drainage system is struggling to cope. 

Find out more about soakaways.

What's geothermal energy and drilling?

Dewatering / ground water control services

Dewatering / ground water control services

Drilling a geothermal borehole or water well

The natural warmth from below the earth's surface is an efficient and renewable way to heat, cool and provide hot water for your home or business. Discover more about geothermal drilling and energy here. 

Dewatering / ground water control services

Dewatering / ground water control services

Dewatering / ground water control services

Installing a dewatering system for HS2 site

Keep your construction project on-track. 

We've worked on some of the largest dewatering projects in the UK. Most recently the HS2 site.

Discover more our ground water control services.


Some of our drilling projects

Striking water at the Happy Sturgeon Fish Farm

It's always a great moment when you realise your going to save £££s for your business!

No job too small!

Yes. You can even drill a borehole to feed your fishpond!

Drilling in Chelsea

Did you know London is a notoriously difficult area to drill?

Over the years we've become experts at this kind of project.

Geo loop installation

An eco-friendly way to heat your home. Here we are installing a 210m geo loop at a home in central London.

Don't just take our word for it...

Our news and updates

Get in touch

Ask us a question or arrange a FREE quote.

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Gretton Site Investigations Ltd

4 Main Street, Ashley, Leicestershire LE16 8HG

Call: 07523 208 711 Email: info@gsidrilling.co.uk

  • Domestic GSHS drilling
  • Commercial GSHS drilling
  • Water Well Drilling
  • Soakaways
  • Dewatering
  • Mini Piling Drilling
  • Privacy Policy
  • Our Drilling Projects
  • Jobs at GSI

Gretton Site Investigations Ltd

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