Sewage Treatment Plant Installation in Sussex, Surrey & Kent
Looking for a reliable team to install your sewage treatment plant? CJ Groundworks has over 35 years of experience delivering off-mains drainage solutions across Sussex, Surrey, and Kent. From domestic to commercial installations, we provide fully compliant systems designed to meet UK environmental standards and Building Control regulations.
Whether you’re replacing an old septic system or need a new sewage treatment plant installation in Surrey or Kent, our expert team ensures every job is carried out safely, efficiently, and to the highest standard.
/Definition
What is a Sewage Treatment Plant?
A sewage treatment plant (STP) is an off-mains wastewater system that treats sewage through natural biological and mechanical processes. It removes harmful contaminants and produces clean, environmentally safe discharge—typically released into a watercourse or soakaway.
Modern sewage treatment plants are efficient, low-maintenance, and built to last. They offer a more sustainable alternative to traditional septic tanks, particularly in areas like Surrey, Kent, and East Sussex, where environmental regulations are stricter.
/ Our Services
Our Sewage Treatment Services
Full Design & Installation
- Our team helps you choose the most suitable system for your property based on usage, ground type, and discharge requirements. We supply and install:
- Domestic sewage treatment plants
- Small and large-scale commercial systems
- Klargester and Clenviro treatment plants
- Solutions for homes, farms, holiday lets, and industrial units
- Whether you require sewage treatment plant installation in Surrey or sewage treatment plant installation in Kent, we guarantee a tailored service that meets both your property’s needs and current UK legislation.
Site Assessment & Regulatory Compliance
- We handle every technical aspect of the installation process, including:
- Percolation tests and ground condition surveys
- Liaison with Building Control and the Environment Agency
- Compliance with BS EN 12566 standards
- Proper soakaway field design and discharge permit requirements
- Our team ensures your sewage treatment plant meets all environmental regulations for peace of mind and long-term performance.
Upgrades & Replacements
If your current system no longer meets compliance or is underperforming, we can upgrade it to a modern, efficient sewage treatment plant.
We frequently assist customers switching from septic tanks to treatment plants to comply with changing environmental laws—particularly in rural areas of Kent, East Sussex, and Surrey.
Repairs & Servicing
CJ Groundworks also provides reliable sewage treatment plant servicing in East Sussex, Surrey, and Kent.
If you’re searching for domestic sewage treatment plant servicing near Surrey, we deliver prompt, professional support to keep your system running efficiently.
/Planning
When to Install a Sewage Treatment Plant
You may need a sewage treatment plant if:
- Your property is not connected to mains drainage
- You are building in a rural or remote location
- Local regulations prohibit septic tank discharge
- You're replacing an old, underperforming system
These systems are ideal for permanent residences, holiday homes, rental properties, and small businesses operating in areas with no mains sewer connection.
We’ve installed sewage treatment plants for:
- Homeowners in new-builds and conversions
- Landlords managing multiple properties
- Holiday lets and glamping sites
- Equestrian and agricultural buildings
/ Our Mission
Why Choose CJ Groundworks?
35+ Years of Experience
A long-standing reputation built on expert workmanship.
In-House
Team
No subcontractors; we keep all trades under one roof.
Fully Insured &
Guaranteed
No subcontractors; we keep all trades under one roof.
Compliant &
Certified
All works carried out to UK building regs and environmental standards.
Local
Expertise
Proudly serving Sussex, Surrey & Kent.
/ Our Area
Locations We Cover
We install sewage treatment plants in:
- Cranleigh
- Horsham
- Midhurst
- Petworth
- Pulborough
- All surrounding areas in Sussex, Surrey, and Kent
Get Expert Help with
Sewage Treatment Today
/ FAQs
Frequently Asked Questions
A septic tank partially treats wastewater, while a sewage treatment plant uses aeration and biological processes to clean the water to a much higher standard—making it safe for discharge into watercourses.
Costs vary based on system size, ground conditions, and installation complexity. A domestic unit may range from £3,000–£5,000 including installation. We provide transparent, fixed quotes with no hidden fees.
You may need to notify Building Control and, in some cases, obtain a discharge permit from the Environment Agency. CJ Groundworks manages all the necessary paperwork and approvals on your behalf.
Most installations take 3–5 days depending on access, weather, and soil conditions. We plan every project carefully to minimise disruption to your property.
We recommend annual servicing to ensure your system remains efficient and compliant. If you’re looking for reliable sewage treatment plant servicing East Sussex or domestic sewage treatment plant servicing near Surrey, CJ Groundworks provides trusted, affordable maintenance solutions.
/Our Contact
Ready to break ground?
Get in touch with CJ Groundworks today to discuss your project and receive a free, no-obligation quotation. Our team is here to answer your questions and provide expert advice tailored to your needs.
Address
CJ Groundworks, Lower Batchelors, Emms Lane, Barns Green, West Sussex, RH13 0QH.
/Our Testimonials