Rainwater Harvesting System Installation

If you don’t want the hassle of installing a rainwater harvesting system, then look no further. We can provide you with a complete package - where we design, supply and install a complete solution for you.


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Rainwater harvesting installation specialists

Trading for 30 years, we’re specialists in the design, supply and installation of rainwater harvesting systems. We offer a range of customisable solutions to meet your specific needs, from small residential systems to large-scale commercial installations.

Our team of specialists are here to help. We are highly trained in the design and installation of rainwater harvesting solutions. Through our expertise we have helped many homes and businesses save money and improve their water efficiency usage.


Types of rainwater harvesting solutions

We will design a rainwater harvesting solution to suit you. We will take into consideration a number of factors, such as the amount of rainfall in your area, the roof space available to capture rainwater, what the water will be used for etc.

There are a number of options available when it comes to selecting a rainwater harvesting solution. For example, do you prefer an above or below ground tank? In general most domestic applications, where space and aesthetics are a concern, below ground storage offers a neat solution. However, most domestic rainwater harvesting systems are not commercially viable, they are installed either because it is a planning condition or the owner likes the green credentials of doing so.

In an industrial or agricultural situation, the harvested volumes are much much greater and space is not such an issue. To store large volumes of water underground is very expensive and detracts from what you are trying to achieve. In these cases, we will aim to store the main volume of harvested roof water above ground. We can also offer premium systems that actually combine both underground and above ground in a ratio of around 1:300.

Below are some examples of solutions we can provide:


Single building


  • Simplicity
  • No electricity required
  • Instant rainwater harvesting
  • No need to separate surface water of drains


Multiple buildings on low roof situations


  • Ultimate flexibilty
  • Storage tank can be sited high for gravity feed
  • Takes full advantage of the lightest showers


Combination of single & multiple buildings


  • Ultimate flexibilty
  • Storage tank can be sited high for gravity feed
  • Takes full advantage of the lightest showers


If you answer yes to the below questions, then the likelihood is that a rainwater harvesting solution would offer you a cost effective solution:

  • Do you pay for your water through a meter?
  • Do you have a large roof area such as a farm or industrial building?
  • Is the majority of your water usage for non potable applications, such as crop spraying, vehicle washing, livestock watering, irrigation etc?

Our team of experts will be able to provide you with further advice based upon your needs and roof space.

Normally, planning permission is not necessary. There is no hard or fast rule across the UK, it is down to the discretion of the local authority. Planners favour building applications that include rainwater harvesting. Official pressure is on to reduce mains water consumption and alleviate flood threats. Rainwater harvesting helps with both these issues. Often now rainwater harvesting is a planning condition on new approvals.

No, there is no licencing requirement for rainwater harvesting, in fact if you pay existing abstraction costs for bole hole or river water you may be able to reduce these.

Reduces water bills

Instead of using water from your tap, which can be expensive, you can use the water you’ve collected for activities such as watering your lawn, washing your car, or flushing your toilet.

Improved water quality

Rainwater is high quality water source, typically free of contaminents such as mineral, salts and pollutants. It can be used for irrigating, washing and cleaning.

Protects against water shortage

By harvesting rainwater, you can reduce your dependence on water supplies, which can help to reduce strain on these systems during times of drought or water scarcity.

Lowered flood risk

Rainwater harvesting reduces the risk of flooding by slowing down the flow of stormwater run-off by allowing it to soak into the ground.

Meet environmental initiatives

By collecting rainwater, you are reducing the amount of water that runs off into storm drains and ultimately ends up in streams and rivers. This can help to reduce erosion and pollution, and it can also help to replenish groundwater supplies.

Prefered drinking source for livestock

Due to rainwater being naturally soft, it is a preferred water source for both crops and livestock.

The cost of a rainwater harvesting system can vary between a few hundred pounds for a basic system collecting and storing rainwater from a small roof, to a few thousand pounds for a larger system that supplies water for a household or farm. In order to calculate your return on investment you need to compare the cost of the system to how much it will benefit you, for example, the amount of money it will save you with reduced water bills.

Servicing rainwater harvesting systems

To ensure the smooth running of your rainwater harvesting solution and prevent any unexpected breakdowns, we recommend any commercial system to be professionally inspected and serviced at least once a year. If this is something you are interested in, then please ask us about it.

Our team of professional maintenance specialists are trained to ensure your rainwater harvesting system continues to perform optimally so that you get the maximum savings.*

*Provision of our maintenance service depends upon your location


Fill in the form below and a friendly member of our team will be in touch with you shortly, alternitively you can use out live chat service or call us now on 0121 351 3230.

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We’re not your typical merchant. Core to everything we do is our customers. After all, without you, we wouldn’t be here. At Cotterill Civils, we offer something a little different and we show this in the values we adhere to every day! Why not get in touch today to see how we can help you!

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