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UK National Overview

Cost of Water Storage Tanks
across the UK

National price data for Water Storage Tanks based on estimated ranges across the UK. Compare regions, find local providers, and understand what affects the price.

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Accreditation & credentials
Trade bodies & what they mean for Water Storage Tanks

# Water Storage Tank Accreditation Guide

Water storage tank installation and maintenance in the UK is governed by several key regulatory bodies and standards. The most relevant is the Water Regulations Advisory Scheme (WRAS), which ensures that products and services meet the requirements of the Water Supply (Water Quality) Regulations 2016. Additionally, many installers hold accreditation from OFTEC (the Oil Firing Technical Association) if they work with oil storage tanks specifically, or from the Chartered Institute of Plumbing and Heating Engineering (CIPHE) for general plumbing work. The Building Regulations also apply to tank installations, and some providers may be certified under BS 8515 (the British Standard for rainwater harvesting systems). Understanding these credentials is important because they demonstrate that a company has been independently assessed for technical competence, safety standards, and compliance with water quality legislation.

To verify a provider's accreditation, you should ask for their certification documents directly and cross-reference them with the relevant body's website—WRAS maintains a public register of approved installers, as does OFTEC. Check whether the accreditation covers the specific service you need, as some certificates are product-specific or limited to certain installation types. A legitimate provider will be transparent about their qualifications and happy to provide proof; if they cannot or are evasive, that is a red flag. Verification matters because water storage systems directly affect your water quality and health, and accredited installers carry professional indemnity insurance, meaning you have recourse if something goes wrong.

Accredited water tank providers typically charge between 10 and 25 percent more than unaccredited alternatives, reflecting their compliance costs, insurance, ongoing training, and regulatory oversight. However, this premium is usually justified because you gain legal protection—your installation will meet Building Regulations, reducing the risk of future problems when selling your

Common questions
Water Storage Tanks — frequently asked questions
How much does a water storage tank cost in the UK?
Water storage tanks typically cost between £500 and £5,000 depending on capacity and material. Plastic tanks range from £500–£2,000, whilst steel and fibreglass options cost £2,000–£5,000+. Installation fees add £300–£1,500. Bespoke systems and larger commercial tanks exceed these ranges significantly.
What affects the price of water storage tanks?
Tank capacity (litres), material type (plastic, steel, fibreglass), installation location complexity, delivery distance, and whether bespoke engineering is required all impact pricing. Additional costs arise from foundation preparation, pipework integration, and regulatory compliance testing. Site accessibility and existing infrastructure also influence final quotes.
What does water storage tank installation include?
Installation includes site survey and preparation, tank delivery, foundation construction, connection to mains or borehole supply, overflow and outlet pipework installation, pressure testing, and commissioning. Many providers offer ongoing maintenance contracts covering inspection, cleaning, and compliance certification required for potable water systems.
What is the difference between above-ground and underground water storage tanks?
Above-ground tanks offer easier maintenance and installation but require more space and weather protection. Underground tanks maximise space and temperature stability but demand extensive groundworks and specialist equipment for servicing. Underground options typically cost 40–60% more but provide superior insulation for year-round use.
What should I check before hiring a water storage tank company?
Verify OFTEC certification, Water Regulations Approved Installer status, and insurance credentials. Request references from recent installations and check memberships with HVCA or similar trade bodies. Confirm compliance with BS 6700 standards and ask for written guarantees. Always obtain multiple quotes and timescales before committing.
How long does water storage tank installation take?
Standard installations typically take 3–7 working days from site preparation through commissioning. Complex projects involving underground excavation or bespoke engineering extend to 2–4 weeks. Post-installation, water quality testing and regulatory approval add 5–10 business days before the system becomes operational.
Do I need a certified professional for water storage tank installation?
Yes, potable water storage tanks must be installed by Water Regulations Approved Installers in the UK. Gas-fired systems require OFTEC certification. Non-potable systems have fewer restrictions, but local building regulations still apply. Always hire certified professionals to ensure compliance and maintain insurance validity.

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National price data sourced from business and consumer submissions across the UK. Regional averages are indicative. Methodology · Submit a price · List your business