Why Are Bunded Oil Tanks So Expensive? Understanding the True Cost & Value

If you’re researching oil storage solutions, you’ve probably noticed that bunded oil tanks are more expensive than single-skin alternatives. This often leads homeowners and businesses to ask the same question: are bunded oil tanks really worth the extra cost?

The short answer is yes—but not just because of regulations. Bunded oil tanks offer significantly higher levels of safety, environmental protection, and long-term value. In this guide, we explain why bunded oil tanks cost more, what you’re paying for, and how they can actually save money over time. We’ll also help you choose the right tank for your needs without overspending.

What Is a Bunded Oil Tank?

A bunded oil tank (also known as a double-skinned oil tank) is designed with two layers of protection:

• An inner tank that stores the heating oil
• An outer tank (bund) that acts as secondary containment

If the inner tank leaks or fails, the outer bund safely contains the oil, preventing it from escaping into the surrounding environment. This design dramatically reduces the risk of pollution, property damage, and costly clean-up operations.

For a clear explanation of how oil storage tanks are constructed and classified, this guide provides useful background information: https://www.jdpipes.co.uk/knowledge/storage-tanks/basic-guide-to-oil-storage-tanks.html

Why Bunded Oil Tanks Cost More

The higher price of bunded oil tanks reflects the additional materials, engineering, and safety features required to meet modern standards.

1. Double-Walled Construction

Bunded tanks use significantly more material than single-skin tanks. The outer bund must be strong enough to hold at least 110% of the tank’s capacity, which increases manufacturing complexity and cost.

2. Advanced Safety Features

Many bunded oil tanks include built-in safety systems such as:

• Overfill prevention valves
• Oil level gauges
• Leak detection indicators
• Secure lockable lids

These features reduce delivery risks and improve day-to-day safety—but they also contribute to a higher upfront price.

3. Regulatory Compliance

UK oil storage regulations are becoming increasingly strict, particularly for tanks located near drains, boundaries, or watercourses. Bunded oil tanks are often required by law in these situations.

This article answers common questions about when bunded oil tanks are compulsory: https://www.tuffa.co.uk/a-few-questions-you-might-have-about-bunded-oil-tanks-answered/

Meeting these regulatory standards adds to manufacturing and testing costs, but it also ensures long-term compliance.

Entry-Level vs Premium Bunded Oil Tanks

Not all bunded oil tanks are priced the same. Costs vary depending on size, material, and features.

Entry-Level Bunded Tanks

• Suitable for standard domestic use
• Fewer add-on features
• Reliable protection at a lower price point

Premium Bunded Tanks

• Enhanced security and tamper resistance
• Higher-quality materials for longer lifespan
• Extended warranties and certifications
• Optional monitoring or alarm systems

Choosing the right model depends on your usage, location, and budget—not just the initial price.

Long-Term Savings of Bunded Oil Tanks

While bunded oil tanks cost more upfront, they often deliver better long-term value.

How They Save You Money

• Reduced risk of oil spills, avoiding expensive clean-up and remediation costs
• Lower insurance risk, with many insurers preferring or requiring bunded tanks
• Fewer replacement costs thanks to longer service life
• Avoidance of fines or enforcement action for non-compliant installations

In many cases, the extra upfront cost is offset over the lifetime of the tank.

How to Choose the Right Bunded Oil Tank Without Overspending

To get the best value for money, consider the following:

• Capacity: Choose a size that matches your oil usage without unnecessary excess
• Location: Certain locations may legally require a bunded tank
• Material: Plastic tanks are lightweight and corrosion-resistant, while steel tanks may suit some commercial sites
• Features: Avoid paying for features you don’t need, but don’t compromise on safety

At Oil Tank Supermarket, we offer a wide range of options to suit different requirements and budgets.

Explore our full range of bunded oil tanks here: https://www.oiltanksupermarket.co.uk/product-category/bunded-oil-tanks/

Conclusion

Bunded oil tanks are more expensive than single-skin tanks for good reason. Their double-skinned design, enhanced safety features, and regulatory compliance make them a smarter, safer investment for most properties.

While the upfront cost may be higher, bunded oil tanks often deliver better long-term value through reduced risk, lower insurance issues, and peace of mind.

If you’re considering a new oil tank or replacing an existing one, Oil Tank Supermarket can help you find the right solution at the right price.

Visit Oil Tank Supermarket to explore your options and get expert advice: https://www.oiltanksupermarket.co.uk/