Septic Tanks & Septic Tank Kits for UK Homes & Businesses
UK-compliant septic systems for homes, businesses & self-build projects. Save thousands with our DIY septic tank kits.
Why Choose SepticTank.co.uk?
Whether you’re a homeowner or an installer, our septic tank solutions make setting up a home septic system in the UK simple and affordable. Here’s why customers trust us:
- UK Regulation Compliant: Every septic tank and soakaway kit we supply adheres to Environment Agency General Binding Rules and meets UK Building Regulations for septic tanks, keeping your installation legal and environmentally safe.
- Affordable Complete Kits: Our all-in-one septic tank kits start at just £1,999. You save thousands of pounds compared to traditional installation costs (often £10,000+), making off-grid drainage budget-friendly.
- Easy DIY Installation: Install your septic system in as little as one day. Our shallow-dig, low-profile tanks require no heavy equipment or concrete backfill, making DIY septic systems easy to install for self-builders and professional installers alike.
- Free Expert Support & Tools: Not sure what you need? We provide free advice and online tools to guide you. Use our septic tank size calculator to find the right size, and read our UK Septic Tank Regulations Guide to understand the legal requirements. Our team is always here to help with any questions.
- Fast UK Delivery: We offer free, speedy delivery across the UK (often within 5–7 working days). All kits are in stock, so you can get your system quickly and keep your project on schedule.
Septic Tank Kits for Every Need
We offer a range of septic tank & soakaway kits to suit any property size or project. Whether you need a compact system for a 1-2 bedroom cottage or a high-capacity setup for a large family home or campsite, we have you covered. Each kit includes a durable septic tank, drainage field crates (soakaway), inlet & outlet pipes, and all necessary fittings – everything required for a successful DIY installation.
One of our popular options:
1-2 Bedroom Septic Tank Kit
A complete septic system kit suitable for properties with up to 2 bedrooms. It includes a 1,200 L polyethylene septic tank, 6 drainage crates for the soakaway, 30m of drainage pipe, connectors, and geotextile membrane. This DIY kit is easy to install and fully UK-compliant.
Price:
£1,999
Septic Tank Installation Video Guide
Watch how easy it is to install a septic tank system with our DIY kit. This short video walks you through the septic tank installation process step-by-step, demonstrating how to set up a home septic system in compliance with UK regulations.
Frequently Asked Questions
What is a septic tank and how does it work?
A septic tank is an underground chamber that collects and treats wastewater from a building not connected to mains sewage. It works by separating solids from liquids: solid waste settles into sludge at the bottom of the tank while oils and lighter materials float as scum on the top. Natural anaerobic bacteria in the tank help break down the waste. The remaining liquid effluent flows out to a drainage field (soakaway), where it safely percolates into the soil for further natural treatment.
Do I need planning permission or a permit for a septic tank in the UK?
In most cases, you do not need full planning permission or a specific permit to install a septic tank for your property. Under the Environment Agency’s General Binding Rules, if your septic tank discharges into a proper drainage field (and not directly to a stream or ditch) and your property isn’t near a protected sensitive area, you can install a septic tank without a permit. You should still notify your local Building Control and ensure the system meets UK Building Regulations for septic tanks.
How much does a septic tank cost in the UK?
The cost of a septic tank system in the UK can vary widely. Hiring a professional company to install a septic tank and drainage field can cost anywhere from £10,000 to £15,000 (or more), depending on the site. By contrast, our DIY septic tank kits start from around £1,999, meaning you can save a tremendous amount by installing it yourself. The exact cost will depend on the tank size you need and your site conditions.
What size septic tank do I need for my home?
The size of the septic tank you need depends on the number of bedrooms (or people) in your household. For example, a typical 3-4 bedroom home (around 5 people) would require a tank of roughly 2,700–3,000 litres capacity. A smaller 1-2 bedroom cottage might need around 1,200–1,500 litres. To get the right size recommendation, use our septic tank size calculator, which will help you determine the perfect system for your home.
How often should I empty or maintain my septic tank?
Generally, a septic tank should be emptied (pumped out) every 1 to 3 years, depending on its size and usage. Routine maintenance is also important: avoid flushing non-biodegradable items or harsh chemicals, conserve water to prevent overloading the system, and have the tank inspected periodically. Regular emptying and proper use will prevent sludge overflow and ensure your septic system continues working efficiently for many years.
Have more questions? Visit our Septic Tank FAQ page for a full list of common questions and expert answers.
Ready to Get Started?
If you’re ready to install a septic tank or need more information, we’re here to help. Contact us for a free consultation and quote. Whether you have questions about UK regulations, sizing your system, or the installation process, our experts are happy to assist. Get in touch today and let us help you find the perfect septic tank solution for your needs.