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H.D. Services Ltd

H.D. Services Ltd Contact Details

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01494 791927
Frank Harris
Thorne Barton Farm, Chesham Rd
Ashley Green

About H.D. Services Ltd

Specialists in:

Sewage Treatment Systems
Ground Source Heat Pumps

Since 1984 H.D. Services has been developing sewage treatment systems culminating with the introduction of their HD-SM in 1994. Over the years we have installed hundreds of HD-SM sewage treatment systems throughout southeast England serving thousands of people.

Our unique modus operandi covers design, supply, installation, commissioning, and servicing. We do not employ agents to sell or install our systems and can take full responsibility for ensuring the discharge complies with the consent issued by the Environment Agency.

H.D. Drilling Ltd
We aim to provide the highest quality, percussion-drilled water supply borehole service available. Our clients depend on our advice and flexibility to suit their individual requirements and we in turn associate ourselves with only those suppliers that have a similar ethos. We are committed to completing contracts on time, using only directly employed labour and our own modern plant.

H.D. Geothermal is part of H.D. Services Ltd, a fully MCS accredited company. We aim to provide the highest quality Open-Loop Ground Source Heat Pump service available in South East England. Our customers can rely on our advice and flexibility to suit their individual requirements and we associate ourselves with suppliers who adopt a similar ethos. H.D. Services Ltd is committed to completing contracts on time and use only directly employed labour.

Our sister company, H.D. Drilling Ltd, carry out all drilling works associated with the installation of our Open-Loop Ground Source Heat Pump systems.  H.D. Drilling Ltd has been constructing water supply and soakaway boreholes in the South East of England since 1984. They have been members of the Well Drillers Association (WDA) since 1988 and have a vast knowledge of the hydro-geology.  This means that they can generally confirm the feasibility of a proposed installation upon the receipt of a site postcode.

Both H.D. Services Ltd and H.D. Drilling Ltd are BS EN ISO 9001 and BS EN ISO 14001 registered companies.

An initial telephone call to our offices will result in the receipt of a budget proposal with prices for consideration at your leisure.

Our engineers can visit the site, free of charge and without obligation, to assess and measure the site.

Products and Services
  • Sewage Consultants Services Effluent Treatment, Sewage, Sewer Connections, Sewage Treatment

  • Sewage Consultants' Equipment & Supplies Cesspools, Grease Traps, Pump Stations, Soakaways, Waste Interceptors

  • Tank Work & Tank Cleaning Replacement Tanks, Sediment Tanks, Tank Inspection, Tank Installations, Tank Removal, Tank Replacement, Underground Tanks

  • Wellborers & Sinkers' Services – for further information please visit our sister company at :

  • Ground Source Heat Pumps – for further information please visit our geothermal website at:

The Environment Agency (EA) introduced new rules regarding the discharge of treated sewage by systems installed and in use on or after 1 January 2015.

If you have a septic tank you need to identify whether it discharges to a river or stream (surface water discharge) or whether it discharges to a drainage field, as after 1 st January 2020 discharges to surface water
from both old and new septic tanks will no longer be permitted by the EA.

If you have a septic tank that discharges directly to surface water you will need to replace or upgrade your treatment system by 1 January 2020.

If your system requires replacing or upgrading due to its discharge location, you have three possible options:
  • connect to mains sewer
  • install a drainage field so the septic tank can discharge to ground instead
  • replace your septic tank with a small sewage treatment plant

Only small sewage treatment plants can be permitted to discharge to a surface water such as a river or stream. A small sewage treatment plant (also known as a package treatment plant) treats the liquid so it’s
clean enough to go into a river or stream.

Discharging to ground:
Discharge from septic tanks and sewage treatment system can be made to ground via drainage fields.

Discharge to a soakaway borehole can only be made from a sewage treatment system and must be permitted by the EA. Permits must be applied for in the following circumstances:

if you discharge:
  • to a well, borehole or other deep structure
  • more than 2 cubic metres (2,000 litres) per day

H.D. Services Ltd ImageH.D. Services Ltd ImageH.D. Services Ltd Image

Reviews & Testimonials for H.D. Services Ltd

5 star review
October 20, 2014
“H.D. Services Ltd has been very professional and supportive in their approach to our renewable
heating project. They ensured that our installation was RHI ready, and have assisted us during the
application process. They are well versed in the domestic RHI and if we have been able to assist
us with any queries we have had regarding the scheme. They have provided us with good
customer service and I would recommend their services to others who were thinking of installing an
Open-Loop ground source heat pump. Since the installation, their aftercare has been excellent and
they have dealt with any issues promptly and professionally.”
Testimonial by
Mr K Clark
H.D. Services Ltd. 5 out of 5 based on 1 ratings.



H.D Services remain award winning RHI Installers

H.D. Services Ltd have again won regional awards for RHI Installer of the year at the Energy Efficiency and Retrofit Awards.

Following successful regionals last year, H.D. again enetered the Energy Efficiency and Retrofit Awards and scooped 1st place for the East of England, 2nd place for the South East and 3rd place for Greater London.

The recognition of our continued hard work in the area of Open-Loop GSHP Installation means a great deal to this small family run company. We strive to provide the best for our clients and keep them at the centre of all we do. This is reflected in our achievements this year and we continue to aim high.
H.D. Services Ltd. at the Homebuilding and Rennovating Show - ExCeL

H.D. Services Ltd. are again attending the Homebuilding and Rennovating Show at Londons ExCeL.

We will be providing information on all our services and have experts available to discuss all your needs for your self-build project whether that be renewable hating, sewage treatment or water supply.

The show has been a success for us in the past and we intend on attending again in 2017.
Products & Services

Water Supply Boreholes Croydon

Water Supply Boreholes Swindon

Sewage Treatment Systems

Sewage Treatment System Maintenance

Ground Source Heat Pumps

Water Supply Boreholes

Soakaway Boreholes

Borehole maintenance and well development


Name Role Email Telephone
Frank Harris Director 01494 792000
Paul Harris Contracts Manager 01494 792000
Rebecca Taylor GSHP Business Development Manager 01494 792000

H.D. Services Ltd Serves The Following Areas

H.D. Services Ltd General Description

ground source heat pump supplier bucks open loop ground source heat pump installer bucks renewable energy hertford water source heat pumps bucks ground source feasibility studies hertford Renewable Heat Premium Payment (RHPP) Renewable Heat Incentive (RHI) bucks sewage treatment
H.D. Services Ltd Branches
H.D. Services Ltd 1
Thorne Barton Farm, Chesham Rd, Ashley Green, Chesham, HP5 3PQ
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H.D. Services Ltd 10
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H.D. Services Ltd 3
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H.D. Services Ltd 4
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H.D. Services Ltd 5
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H.D. Services Ltd 6
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H.D. Services Ltd 7
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H.D. Services Ltd 8
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H.D. Services Ltd 9
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H.D. Services Ltd2
Ashley Green
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