What does a private water system cost?
Because every site is different, there is no meaningful way to estimate cost without a proper assessment. Here is what goes into a complete system and what factors influence the price.
What is a complete water system?
Nicholls delivers complete, turnkey private water systems — not just boreholes. A reliable supply requires every element to be correctly specified, installed and commissioned. These are the components that make up a typical system:
Borehole drilling
Drilled to the depth required to reach a productive aquifer, based on local geology and hydrogeological assessment.
Submersible pump
Sized to meet your peak daily demand, installed within the borehole casing with electrical controls.
Pressure vessel & control system
Maintains consistent water pressure throughout the property and manages pump cycling automatically.
Pipework to property
Routed from the borehole head to your building, trenched and insulated to meet building regulations.
Filtration system
Removes iron, manganese and sediment to deliver clean, clear water. Configured to your specific water chemistry.
UV treatment
Ultraviolet disinfection provides bacteriological safety without chemicals, ensuring the water is safe to drink.
Water quality testing
Full laboratory analysis on commissioning confirms the supply meets drinking water standards.
Ongoing monitoring
Regular water quality checks and system performance monitoring to maintain compliance and reliability.
What factors affect cost?
No two sites are the same, which is why a proper assessment is essential before any estimate can be given. These are the key variables that influence the price of a private water system.
Borehole depth & geology
The geological conditions beneath your site are the single biggest variable. Drilling through chalk is very different to the Wealden Clay — deeper boreholes or more complex formations cost more to drill and case.
Water usage requirements
A domestic property with modest daily use requires a very different system to a farm irrigating crops or a commercial operation running cooling plant. Higher demand means larger pumps, bigger pressure vessels and potentially an abstraction licence.
Water quality
The natural chemistry of the groundwater determines treatment complexity. High iron, manganese or hardness levels require additional filtration stages, each adding to the overall system cost.
Site access & conditions
Our drilling rigs are compact but still need safe access. Narrow lanes, soft ground, live operational sites or properties with restricted working hours can all affect the programme and cost.
Pipework & connection
The route from borehole to building matters — longer runs, hard surfaces to cross, or deeper trenching through existing services add to the civil engineering element of the project.
Abstraction licensing
Any abstraction above 20 cubic metres per day requires a Water Abstraction Licence from the Environment Agency. Our sister division, Nicholls Licensing & Consulting, handles this process end to end.
Learn about our licensing servicesWhy we start with a site assessment
Before we quote, we carry out a desk-based review of your site covering local geology, existing water quality data and your intended usage. This allows us to provide an informed, accurate estimate rather than a guess.
The assessment considers aquifer depth and yield potential, likely treatment requirements and any regulatory factors such as abstraction licensing. It costs nothing and commits you to nothing — it simply gives you the information you need to make a decision.
No obligation. Our initial site assessment and estimate are provided free of charge. We believe in giving you the full picture before you commit.
Is it worth the investment?
A private water system provides independence from mains supply, protection from rising water charges and a tangible addition to your property value. For rural properties without a mains connection, a borehole is often the only viable option.
For properties already connected to mains, the case depends on usage volume. Higher-consumption sites — farms, estates, commercial operations — typically see significant savings within a few years. For domestic properties, the economics improve further when combined with reduced standing charges and the long-term reliability of your own supply.
Ready to find out what your system would cost?
Get in touch for a free, no-obligation site assessment and estimate from our team.