Do I Need Planning Permission or Just Building Regulations Approval? – A Complete Guide for UK Homeowners
Homeowners across the UK often find themselves confused about the difference between planning permission and building regulations approval. While the two are closely linked, they serve very different purposes. Understanding when you need one, the other, or both can save you time, money, and the stress of unexpected enforcement action.
What’s the Difference Between Planning Permission and Building Regulations?
Planning permission is about whether you’re allowed to carry out the development in the first place, considering its impact on your neighbours, the street, and the wider environment. Building regulations approval is about how you build — ensuring your project is safe, energy-efficient, and structurally sound.
When Planning Permission Is Required
Planning permission is normally needed when you want to make significant changes to the use, size, or appearance of a property. Examples include:
• Large extensions beyond permitted development limits
• Loft conversions with dormers facing the road
• Building a new house or flat conversion
• Outbuildings in front gardens
• Developments in conservation areas or green belt land
Even if a project looks small, local planning rules may restrict what you can do.
When Building Regulations Apply
Most building work in the UK must comply with the Building Regulations 2010. Approval ensures that structural safety, insulation, drainage, fire safety, ventilation, and electrics all meet national standards. Building regulations will almost always apply to:
• Extensions and structural alterations
• Loft and garage conversions
• New heating, drainage, or electrical systems
• Roof replacements and insulation upgrades
• Internal wall removals involving structural supports
Projects That May Need Both
Some projects require both planning permission and building regulations approval, such as:
• Garage conversions
• Double-storey extensions
• New houses or annexes
• Barn conversions
• Basement extensions
Failing to get either consent can cause issues when selling your property and may lead to enforcement action.
Common Homeowner Mistakes
Many homeowners assume that if their project falls under permitted development rights, they don’t need building regulations approval — this is a common misconception. Others confuse a lawful development certificate (which proves planning permission isn’t required) with building regulations sign-off.
How an Architectural Designer Helps
A professional architectural designer can:
• Advise whether planning permission is required
• Prepare and submit planning applications or lawful development certificates
• Produce detailed building regulations drawings for building control
• Coordinate with engineers and contractors to ensure compliance
• Save you time and money by avoiding delays or refusals
Conclusion – Get Expert Help from Draw & Plan
If you’re planning a home extension, loft conversion, garage conversion, or new build, it’s vital to know whether you need planning permission, building regulations approval, or both. At Draw & Plan, we provide expert advice, planning drawings, and building regulations drawings, guiding you from start to finish.
Disclaimer: This article is for general informational purposes only and does not constitute legal or professional advice. Always consult relevant professionals and local authorities before undertaking any development or change of use.