This is general guidance based on standard permitted development rights in England. Rules differ for listed buildings, conservation areas, and properties with Article 4 directions. Always confirm with your local planning authority before starting work.
Do I Need Planning Permission for an Oil Tank Installation in Hounslow?
Installing a domestic oil storage tank for heating oil. Oil tanks are treated as outbuildings under permitted development and have specific conditions regarding capacity and position.
Planning in Hounslow
68%
of planning applications granted
94%
decided within the statutory or agreed time
57%
of householder applications decided within 8 weeks
In the year to December 2025, Hounslow decided 1,284 planning applications. 760 of these were householder projects such as extensions, loft conversions and outbuildings, of which 72% were granted.
Planning statistics: MHCLG planning application statistics, the year to December 2025. Conservation area and Article 4 data: planning.data.gov.uk, © Historic England / Crown copyright. Open Government Licence v3.0.
Important: Additional Restrictions May Apply in Hounslow
Hounslow has 33 conservation areas. These include Bedfont Green, Bedford Park, Chiswick High Road, Chiswick House, Cranford Village, Feltham Town Centre. If your property is in a conservation area, some or all permitted development rights may be restricted. For example, you may need planning permission for changes that would normally be permitted, including alterations to the roof, cladding, or extensions visible from a public highway.
Check with Hounslow planning department before starting work to confirm whether your property is affected by any special designations.
Permitted Development Rules for an Oil Tank Installation
Generally permitted under Part 1, Class E of the GPDO (as an outbuilding). Oil tanks up to 3,500 litres are PD provided they are not between the dwelling and a highway, comply with outbuilding height limits, and do not cover more than half the curtilage.
Conditions
- 1Maximum capacity: 3,500 litres
- 2Must not be between the dwelling and a highway
- 3Must comply with outbuilding PD height limits
- 4Must not cover more than half the curtilage (combined total)
- 5Must be sited in accordance with OFTEC guidelines for fire safety and environmental protection
Size and Dimension Limits
- Capacity: 3,500 litres maximum
- Height: same as outbuildings (2.5m within 2m of boundary; 4m/3m elsewhere)
When Permitted Development Does Not Apply
- Tanks over 3,500 litres are not PD
- Must not be forward of the principal elevation
- Environmental regulations apply to prevent oil spills (Oil Storage Regulations 2001)
- Secondary containment (bunding) is required for tanks over 200 litres in certain areas
What About Building Regulations?
Building regulations approval is likely required
Building Regulations apply under Part J (combustion appliances and fuel storage). Covers tank construction, bunding and secondary containment, fire separation distances from buildings, ventilation, and oil supply pipework. An OFTEC-registered installer can self-certify the work.
Building regulations are separate from planning permission. Even if your project is permitted development, you may still need building regulations approval. Contact Hounslow building control or use an approved inspector.
How to Apply in Hounslow
If you need planning permission for your oil tank installation, you can apply through Hounslow's planning department or via the national Planning Portal.
If your project is permitted development and you want written confirmation, you can apply for a Lawful Development Certificate (LDC) from Hounslow. This provides proof that your project does not need planning permission, which can be helpful when selling your property.
What Happens If I Build Without Permission?
Low planning enforcement risk for tanks within PD limits. Environmental enforcement is a greater concern: oil spills from poorly installed or maintained tanks can result in prosecution by the Environment Agency and clean-up costs of tens of thousands of pounds.
Frequently Asked Questions
Do I need planning permission for an oil tank installation in Hounslow?
Does an oil tank installation in Hounslow need building regulations?
How do I apply for planning permission in Hounslow?
How long does planning permission take in Hounslow?
What percentage of planning applications does Hounslow approve?
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