01403 733214 or 07881 757877 chris@cjgroundworks.com

CJ Sewage Treatment

CJ Sewage Treatment is a dedicated environmental team specialising in the installation of sewage treatment plants as well as the associated drainage required.

What We Do

Sewage Treatment Plant iCon

Sewage Treatment Plants

Latest Environment Agency Compliant installations.

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Septic Tanks

Only the finest quality Septic Tank brands are installed by CJ Sewage Treatment.

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Comprehensive Sewage and Groundworks

CJ Sewage Treatment was established by Christian John, after working in the industry for over 35 years and installs septic tanks and sewage treatment plants in Kent, Surrey, and Sussex in the South East of United Kingdom.

We are specialists in the Off-Mains Drainage sector and provide comprehensive sewage and groundworks installation service for a range of clients such as Developers, Local Builders & all Environmental Services.

Our team have a wealth of experience in this sector offering advice and design solutions for the installation of both commercial and private drainage including sewage treatment systems from all the leading manufactures including Klargester, Marsh and Falcon. Most of our installations are for 1-2 house units in a domestic capacity, but we also install units for larger commercial set ups.

Although most domestic applications will not require consent to discharge, we work in conjunction with the relevant local authority and the environment agency to ensure all the necessary approvals are in place if required.

Most domestic installations involve considerable upheaval within often carefully, manicured gardens. Every effort would be made to keep disruption to a minimum along with careful reinstating.

  • Over 30 Years of References
  • Exacting Standards
  • FREE Quote
  • Safety Approved Contractor
  • Latest Environment Agency Regulations
  • Fully Guaranteed Work
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CJ Client logos Kingspan colour
CJ Client logos Graf colour
CJ Client logos Falcon colour
CJ Client logos Apex colour

Sewage Treatment Plants

We provide complete Sewage Treatment Plant Solutions, offering solutions for all scenarios, including sewage and waste water treatment tanks for all sizes of domestic dwelling, septic tank replacement or conversion and upgrade of existing systems, as well as full packaged sewage treatment plants for new builds.

We at have installed and commissioned many thousands of these in small residential rural dwellings to hospitals.

To see some of the rules regarding the discharge of waste water to surface water please see the details provided by the Environment Agency here : General Binding Rules For Small Sewage Discharge. 

CJ Sewage can provide full design packages including a free site assessment as part of a site visit to ensure that your home, plant, commercial building are fully compliant with the new Environment Agency regulations.

Call us today for a no obligation chat about your issue.

Sewage Treatment Plant

Septic Tanks

Septic Tanks are watertight triple-walled heavy duty plastic tanks that are used for the storage, and processing of wastewater and sewage. They are used where there is no possibility to be connected to the mains sewage pipes. CJ Sewage Treatment has installed many of these over the years we have been in business. From large commercial tanks to smaller residential tanks and we are approved installers of Klargester Systems including:

CJ Sewage Treatment – the one name to call for all your Septic Tank inquiries. 

Septic Tank Being Installed In Garden
Septic tank being installed


Cesspits are underground tanks that capture sewage and wastewater. They are completely sealed and watertight, apart from a single manhole cover for access.

Cesspits are measured in litres but sizes are available based on the number of people in a residence or commercial property. Cesspits will need to be emptied regularly, and the regularity of the cesspit emptying will depend on the capacity and frequency of use of toilets in the property. Cesspits are usually installed where the ground is unsuitable for soak away treatment due to the property being sited close to a watercourse or drinking water supplies.

Cesspit installed under chippings
Sewage treatment plant

Tank: 12 person biotech 2 deep invert sewage treatment plant

Client: Private

Location: Kent

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Tank: 200 person pumped outlet Klagseter sewage treatment plant

Client: Bright Horizons Spingfield Lodge 

Location: Dartford

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Tank: 50 person low profile Klagseter sewage treatment plant

Client: Tarmac building material company

Location: Battle, East Sussex

Contact Us

CJ Groundworks Christian John, Lower Batchelors, Emms Lane, Barns Green, West Sussex, RH13 0QH

01403 733214 or 07881 757877