Oil tank replacement cost in 2026

Detail that affects your quote for an oil tank replacement

• Standard bunded plastic tank (1,200 to 1,400 litres) typically costs £1,200 to £1,800 fitted
• Larger tanks, steel tanks or difficult access can push cost to £2,000 to £2,800 or more
• Bunded tanks (tank within a tank) are required for most domestic installations under current rules
• A new concrete base is sometimes needed and adds to the overall cost
• Removal and safe disposal of the old tank and residual oil is normally included

What we check first with an oil tank replacement

In 2026, a standard single-skin or bunded plastic tank around 1,200 to 1,400 litres typically costs £1,200 to £1,800 fully installed, including removal and safe disposal of the old tank and its residual oil. Larger tanks, steel tanks, or tanks needing a new concrete base or a more difficult access route for delivery can push the cost to £2,000 to £2,800 or more. Current regulations generally require a bunded tank, meaning a tank within a tank to contain any leak, for most domestic installations, particularly where the tank is near a watercourse or within a set distance of a building, which is checked and confirmed before the replacement is specified.

Where we deal with this

• Gurney Slade (BA3) · 6 mi
• Walton (BA16) · 14 mi
• High Littleton (BS39) · 3 mi

Questions we get asked

How do I know if my oil tank needs replacing?

Visible cracking, corrosion on an older steel tank, a failed bund, or an OFTEC inspection flagging deterioration are the usual triggers for replacement.

Do I need planning permission for a new oil tank?

Most domestic replacements don't need planning permission, but siting rules around distance from boundaries and buildings still apply and are checked beforehand.

Can the new tank go in the same spot as the old one?

Often yes, provided it still meets current siting and clearance rules, though this is confirmed on site rather than assumed.

Is a bunded tank compulsory?

For most domestic situations, yes, and it's generally the sensible choice regardless, since it contains a leak rather than letting it reach the ground.