Groundwork Company in Sussex, Surrey & Kent
Welcome to CJ Groundworks, a trusted groundwork company serving domestic, commercial, and industrial clients across Sussex, Surrey, and Kent. With more than 35 years of experience, our family-run business delivers reliable, fully insured groundworks and drainage solutions tailored to your project’s specific requirements.
As one of the leading groundwork contractors in Surrey and Kent, we pride ourselves on exceptional workmanship, honest pricing, and long-lasting results. Whether you need a concrete base for a garden building or a complete sewage treatment plant installation in Kent, our expert team manages every stage — from excavation to completion.
/ Our Services
Our Groundworks & Drainage Services
As a full-service groundwork company, we provide comprehensive site preparation, foundations, and drainage solutions for homeowners, developers, and businesses throughout the South East, including:
Groundworks & Site Preparation
- Site clearance & levelling
- Excavation and earthworks
- Building foundations: strip, raft, trench fill & piled
- Concrete bases for sheds, garages & garden rooms
Drainage Installation
- Foul and surface water drainage systems
- Septic tanks and cesspit installations
- Sewage treatment plants (STPs)
- Soakaways, French drains & stormwater systems
- Drain repair, CCTV surveys & jetting
Off-Mains Drainage Specialists
If you’re not connected to mains drainage, we provide bespoke off-grid systems, including sewage treatment plant servicing in East Sussex and domestic sewage treatment plant servicing near Surrey. All installations are fully compliant with current environmental standards.
Concrete Bases
Whether you’re installing a shed, garden room, or outbuilding, we provide high-quality shed base concrete in Kent and Surrey.
Each base is reinforced with a Type 2 sub-base, damp-proof membrane, and precision levelling for a flawless finish. Our concrete bases are customised to your structure’s load requirements and intended use.
Building Foundations
Our team designs and installs strong, stable building foundations for every type of structure. From house extensions and garages to new builds on challenging terrain, CJ Groundworks provides solutions that last.
We also specialise in industrial groundwork in Surrey, ensuring large-scale commercial and civil engineering projects meet all structural and safety standards.
/ Our Mission
Why Choose CJ Groundworks?
35+ Years of Experience
Proven expertise across all aspects of groundworks and drainage.
In-House
Team
No subcontractors; every project is handled by our qualified, insured operatives.
Fully Insured &
Guaranteed
Public and employer liability cover, plus a 2-year workmanship guarantee.
Compliant &
Certified
Work completed to UK Building Regulations and Environmental Agency standards.
Local
Expertise
Covering Sussex, Surrey, and Kent, including Horsham, Cranleigh, Midhurst, Petworth, and Pulborough.
/ Our Clients
Who We Work With
As an experienced groundwork company, we work with:
- Homeowners developing or improving their property
- Commercial developers and local builders
- Industrial clients needing drainage groundworks in Kent or Surrey
- Rural sites requiring sewage treatment or septic tank installation
Our experienced team can adapt to tight timelines, limited access, and complex site conditions — always delivering safe, efficient, and compliant groundworks.
/ Our Portfolio
Example Projects
Our portfolio includes:
Garden room concrete bases in Horsham
Sewage treatment plant installations in Cranleigh
Full groundworks packages for new builds in Midhurst
Septic tank replacement and drainage upgrades in Petworth
We’re proud to maintain long-term relationships with local contractors and property owners who trust us to deliver results, time and again.
/ Our Locations
Areas We Cover
We’re a Horsham-based groundwork company covering:
- Cranleigh
- Horsham
- Midhurst
- Petworth
- Pulborough
- All surrounding areas in Sussex, Surrey, and Kent
Get a Free Quote
Give us a call on 0788 175 7877 or email chris@cjgroundworks.com to discuss your project. We’re happy to meet you on-site, at your property or at our yard — whatever works best. No obligation, just straight-talking expert advice.
/ FAQs
Frequently Asked Questions
A groundwork company prepares your site for building or installation. This includes excavation, levelling, foundation laying, drainage works, and concrete base construction. Our goal is to ensure your site is safe, stable, and ready for the next phase of construction.
Costs depend on the project’s complexity, soil conditions, and site access. A small concrete shed base may cost a few hundred pounds, while complete foundation and drainage groundworks in Kent will cost more. We always provide detailed, itemised quotes.
Yes — we carry both public and employer liability insurance, and all our operatives are fully qualified. Our installations meet all Building Regulations and Environmental Agency standards.
Absolutely. We specialise in septic tank installation in Kent, cesspit installation, and sewage treatment plant servicing in Surrey. We also handle system upgrades and compliance testing.
We cover Sussex, Surrey, and Kent, focusing on Horsham, Cranleigh, Midhurst, Petworth, and Pulborough. If you’re unsure whether we work in your area, just give us a call — we likely do.
/Our Contact
Ready to break ground?
Get in touch with CJ Groundworks today on 0788 175 7877 for expert advice and a free quotation. Your trusted groundwork company in Sussex, Surrey, and Kent — delivering quality from the ground up.
Address
CJ Groundworks, Lower Batchelors, Emms Lane, Barns Green, West Sussex, RH13 0QH.
/Our Testimonials