Small domestic fuel tanks can normally be installed without planning permission. However, permission will be required in certain circumstances.
The permitted development regime includes liquid petroleum gas tanks as well as oil storage tanks.
If you live in a listed building, you should check with your local planning authority.
The installation of a fuel tank should meet the necessary building regulations requirements.
If the installation is above ground the requirements will be applied to achieve adequate shielding of the tank from any surrounding fire and containment of any leakage.