Septic Tank Installation in Sussex, Surrey & Kent
Looking for reliable septic tank installation in Sussex, Surrey, or Kent? CJ Groundworks is your trusted local specialist with over 35 years of experience in drainage and off-mains wastewater systems. Whether you’re replacing an old tank, upgrading to meet regulations, or installing a new system for a rural property, our expert team will guide you through every stage — from site assessment to completion.
Our family-run business handles all aspects of installation, including excavation, drainage field design, soakaway construction, and Building Control approval. We guarantee every septic tank installation is fully compliant with UK environmental standards and Environment Agency (EA) guidelines.
/ Our Services
Our Septic Tank Installation Services
At CJ Groundworks, we deliver comprehensive septic tank solutions tailored to your property, location, and ground conditions.
 
															Septic Tank Installation
- We supply and install high-performance septic tank systems throughout West Sussex, Surrey, and Kent, ensuring a reliable and long-lasting drainage solution for domestic and commercial properties.
- Our installation services include:
- Septic tank and soakaway setups
- Klargester septic tank systems
- Septic tank and pump solutions for poor drainage areas
- We manage permits, surveys, and Building Control sign-off.
 
															Septic Tank Replacement
- If your current tank is damaged, non-compliant, or failing to perform, we provide full septic tank replacement services.
- Common reasons for replacement include:
- Signs of pollution or overflow
- System failure or damage
- Changes in usage (e.g. home extensions)
- We’ll assess your existing setup and recommend whether a septic tank or sewage treatment plant is the most suitable and compliant solution for your land.
 
															Septic Tank Emptying & Servicing
- While CJ Groundworks doesn’t carry out tank emptying directly, we can recommend licensed local contractors across Sussex, Surrey, and Kent.
- Routine servicing and inspections
- Compliance checks
- Maintenance advice for optimal system performance
- Our regular servicing helps you prevent issues such as odours, blockages, or environmental leaks, extending the lifespan of your tank.
 
															/Planning
When is a Septic Tank the Right Solution?
Septic tank installation is best suited for properties that:
- Aren’t connected to the main sewage network
- Have sufficient ground for a soakaway system
- Require a low-maintenance, gravity-fed drainage solution
They’re often used in rural homes, holiday properties, farms, and buildings where electricity supply is limited or inconsistent, making them a simpler alternative to sewage treatment plants.
We’ve installed septic tanks for:
- New builds and home renovations
- Barn conversions and countryside retreats
- Equestrian and agricultural sites
- Holiday lets and guest accommodations
If you’re unsure whether your property is better suited to a septic tank or sewage treatment plant, our experts will carry out a detailed ground assessment and provide honest, practical advice.
/ Our Mission
Why Choose CJ Groundworks for Septic Tank Installation?

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 for Septic Tank Installation
 
															Our team helps you determine if a septic tank is compliant and practical for your land.
- Cranleigh
- Horsham
- Midhurst
- Petworth
- Pulborough
- All surrounding areas in Sussex, Surrey, and Kent
Whether you’re searching for septic tank installation West Sussex or a professional replacement in Surrey or Kent, our experienced team can help.
Get a Free Septic
 System Assessment
				/ FAQs
Septic Tank Installation FAQs
A septic tank is an underground chamber that collects and partially treats wastewater from your home. Solids settle at the bottom while liquid effluent drains safely into a soakaway or drainage field. It’s a passive, energy-free system that requires only periodic emptying.
Typically every 12–18 months, depending on usage and tank capacity. Neglecting to empty your tank can cause blockages, odours, and system failures. We can recommend trusted septic tank emptying providers in your local area.
Since 2020, all septic tanks must comply with the Environment Agency’s General Binding Rules. Discharges directly to surface water are no longer permitted. CJ Groundworks ensures every septic tank installation is fully compliant and properly certified.
Most installations only require Building Control notification rather than full planning permission. If discharging to a watercourse or installing in complex ground conditions, we’ll handle any necessary permits and approvals.
Signs include foul odours, standing water near the tank, backflow issues, or regular overflows. Our specialists can assess your system and advise if a new septic tank installation is needed.
 
															/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
What clients say about us
I contracted CJ Groundworks to install a sewage treatment plant, it was a very pleasant experience dealing with Chris and his ever smiling team. The job was done professionally in time at a reasonable price. The plant is working satisfactorily for 3 months.
After calling round dozens of other contractors and hearing nothing I came across CJ groundwork's and I'm glad I did. They built a big shed base and carried out landscaping work in the garden. They fitted us in at short notice and everything was done to a brilliant standard at a fair......
