What is a Soakaway?

A soakaway is a hidden underground drainage solution designed to manage excess surface water. Essentially, it’s a pit filled with gravel, rubble, or specially designed soakaway crates, strategically placed to collect and gradually disperse runoff water back into the ground. This system mitigates flood risks, especially in areas prone to heavy rainfall, by providing a controlled outlet for excess water.

With heavy rains being a regular occurrence in the UK, soakaways have become an essential component of both residential and commercial drainage systems. They’re particularly useful for sites where standard stormwater drainage systems aren’t available or feasible, such as rural areas and sports fields.

Why Soakaways Are Important

Waterlogged soil, flooded properties, and even structural damage can all be results of unmanaged surface water. A soakaway provides an environmentally friendly and efficient solution to this problem. Not only does it prevent flooding, but it also supports natural groundwater replenishment, enhancing local ecology.

Soakaways are incredibly cost-effective as well. Compared to other drainage systems, they require minimal maintenance and, once installed, are entirely out of sight. This makes them ideal for residential gardens, public parks, and even high-maintenance areas like sports pitches.

When and Where Soakaways Are Needed

Soakaways are versatile and can be adapted to a variety of locations, making them an invaluable asset in:

  • Rural Areas: In places without storm drainage systems, soakaways offer an effective way to prevent waterlogging and flooding.
  • Suburban Gardens: Homes with boggy lawns or inadequate drainage benefit significantly from soakaways, which ensure water doesn’t pool in undesirable areas.
  • Sports Fields and Pitches: Due to their large, open nature and vulnerability to heavy rainfall, sports fields, like football pitches, often utilize multiple soakaways to maintain optimal playing conditions.
  • Commercial Properties: Soakaways help businesses maintain accessible, flood-free landscapes, which is critical for public safety and building integrity.

For anyone planning a soakaway installation, certain regulations must be considered, such as maintaining a safe distance from structures (usually 5 meters or more) and avoiding areas where groundwater contamination is possible.

Benefits of Installing a Soakaway

  1. Flood Prevention: Soakaways reduce the risk of localised flooding by directing runoff away from vulnerable areas.
  2. Groundwater Replenishment: Soakaways help support the natural water cycle by allowing rainwater to gradually re-enter the groundwater system.
  3. Environmental Sustainability: This drainage solution is not only low-maintenance but also contributes positively to surrounding ecosystems.
  4. Cost-Effectiveness: Installation and maintenance costs for soakaways are typically lower than for alternative drainage systems, offering significant long-term savings.
Soakaway design and testing
BRE Digest 365 Soakaway Test (Trial Pit)

How GeoEnviro Solutions Can Help with Soakaway Design and Installation

At GeoEnviro Solutions, we specialize in not only soakaway design and testing services but also the complete installation process, including the necessary borehole drilling. By collaborating with our sister company, Borehole Solutions, we offer a comprehensive service that covers every stage of the project. This partnership ensures that your soakaway system is installed by experts using the latest drilling techniques, tailored precisely to your site’s needs.

Our experienced geotechnical and environmental engineers work closely with architects, builders, and property developers to design soakaways that align with the project’s drainage needs and comply with all regulatory standards.

Based in West Yorkshire, we provide ground investigation and geotechnical services nationwide. Our dedication to quality information, collaboration, and sustainability underpins every project we undertake, ensuring that you get reliable and effective drainage solutions.

We also conduct soakaway percolation tests to determine soil permeability, which is a critical step in designing an effective soakaway system. Our testing methods are thorough, giving you peace of mind that the system will handle runoff effectively and comply with local regulations.


For more details on how a soakaway could benefit your property, contact us today. Our team is here to guide you through each stage of your soakaway project, from initial testing to final installation.


Explore our Soakaway Testing and Design Services to see how GeoEnviro Solutions can help you manage water effectively.

Learn more about sustainable drainage systems at UK Government’s Planning Practice Guidance.