Septic Tank Installation Specialists

High-quality installations across the South

Need a new septic tank installed? Count on our skilled team to install a brand-new, high-quality septic system on your property, handling the process with both precision and speed.

Trust the South’s First Choice for Septic Tank Installations

If your property isn't able to connect to the standard sewer system, a septic tank could be just what you need. These tanks handle your household wastewater by treating it internally before releasing the treated waste through an outlet pipe – no main sewage connection necessary!

Modern septic tanks are much more advanced than the tanks and cesspits of old. They're built to resist corrosion and environmental stress, giving them a much longer lifespan, and often contain features like aerobic treatment units or media filters to make them more eco-friendly. This makes septic tanks a smart and budget-friendly alternative to the regular mains connection.

Whether you're working on a project in a rural area or upgrading your own system, the accredited team at Greenstar are here to help. Our experts are well-equipped to design and install a reliable septic tank system for your property, no matter its size or layout, and we take pride in offering first-rate service and workmanship.

You can trust us to handle the entire process, from design and supply to installation and system checks. You'll get the smooth and hassle-free installation you're hoping for, all at some of the most competitive prices in the area.

Expert advice and installation team available 24/7, request a callback

Septic Tank System Design, Supply, and Installation

You can put your worries aside when it comes to dealing with multiple contractors. Our all-inclusive service has got you covered from start to finish, making the installation process a breeze.

To begin with, our team will assess your property and any existing septic systems. We'll then work with you to create a septic tank setup that perfectly suits your needs or the needs of future occupants.
Once the design is locked in, we'll handle the installation with skill and care. This involves tasks like digging, setting up the foundation, placing the tank, and connecting all the pipes – all done with precision and attention to detail.
Finally, we'll put the system through thorough testing to make sure everything runs smoothly, giving you total peace of mind.

Accredited Team with Three Decades of Experience

For more than three decades, the Greenstar team have been installing state-of-the-art septic tanks across properties in Dorset, Hampshire, and Wiltshire.

As Which? Trusted Traders, we take pride in our commitment to five-star workmanship, transparent pricing, and quality customer service. We work hard to provide you with the best possible service throughout your installation, so you never have to worry about chasing up responses or slow progress.

No matter how intricate the system or how large the property, you can rely on our team to carry out your installation to the highest possible standard.

Over 780 positive Checkatrade reviews
Competitive quotations
Full qualifications and accreditations
OAP discounts

Ready to take the next step? Get a quote online or give us a ring on 01202 355 344 today. We're happy to answer any questions you might have and provide you with a detailed walkthrough of our installation process. Don't hesitate to reach out – we're here to help!

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Septic Tank FAQs

A septic tank is an underground, watertight container designed to treat and dispose of wastewater from a building's plumbing system. It’s a common method of wastewater treatment for properties that can’t be connected to a centralised sewer system.

Septic tanks are usually installed on homes and buildings that aren’t connected to a centralised sewer system. Their main purpose is to treat, store, and dispose of wastewater in a relatively simple and effective way, without having to be connected to the main sewage system.

A septic tank is typically located underground on a property, often in the back garden. Its exact placement can vary based on local regulations, soil conditions, and the layout of the property.

In general, a tank will be situated at a distance from the house, usually downhill and away from any water sources such as wells, rivers, or lakes, to minimise the risk of contamination.

Although each system is slightly different, all septic tanks follow a similar process. Here’s an overview of how they work:

Wastewater from the building's toilets, showers, and sinks flows into the septic tank via pipes.
Inside the tank, solid waste sinks to the bottom and forms a layer called sludge, while lighter materials like oil and grease float to the top, forming a layer called scum. The remaining liquid wastewater, known as effluent, is situated between the layers of sludge and scum.
Bacteria in the tank break down the solid waste in an oxygen-deprived environment. This natural process, known as anaerobic digestion, decomposes the organic matter in the sludge, converting it into gases, liquid, and a smaller amount of residual sludge.
The liquid effluent, which is relatively clarified and treated by the anaerobic digestion process, exits the septic tank and enters the drain field (also called a leach field or absorption field). The drain field consists of a network of perforated pipes or chambers buried in the soil. The effluent gradually seeps into the soil, where further biological and chemical processes help filter and purify the water before it returns to the groundwater.

Absolutely! Septic tanks are completely legal to install in the UK, so long as you follow the relevant regulations regarding their use and maintenance.

In most cases, you’ll need to get planning permission when installing a new septic tank on your property. If you're looking to replace an existing septic tank, however, planning permission is typically not required.

Before diving into any big projects on your property, it's always best to check in with your local authority. This will make sure you’re not breaking any regulations and spare you from costly fines down the road.

The exact cost of installing a septic tank depends on its size and location. Generally speaking, you can expect to pay anywhere from £2,000 to £4,000 (including materials, labour, and VAT).