If you're starting a building project in the UK, whether it's an extension, a loft conversion, or a new build, you’ll come across two essential requirements: planning permission and building regulations.
They sound similar, but each serves a different purpose, and they follow separate processes. Understanding both is key to keeping your project legal, safe, and on track.
What Is Planning Permission?
Planning permission looks at how your proposed development affects the area around it. It’s granted by your Local Planning Authority and focuses on the impact and appearance of the project rather than how it’s built.
It considers:
In simple terms, planning permission asks: “Can I build this, here, in this way?”
You may need planning permission for:
What Are Building Regulations?
Building Regulations ensure your project is built safely, correctly, and to national standards. They look at how the building is constructed and whether it is safe, energy-efficient, healthy, and accessible.
They cover areas such as:
In short, building regulations ask: “Is this building safe and fit for use?”
Approval is obtained through Building Control via your local authority or an approved independent inspector. You’ll usually need technical drawings and detailed specifications to get sign-off.
Key Differences: Planning Permission vs Building Regulations
Feature
Planning Permission
Building Regulations
Purpose
Controls what and where you build
Ensures how you build is safe and compliant
Authority
Local Planning Authority
Building Control
Focus
Appearance, size, use, location
Safety, structure, performance
Timing
Usually comes first
Required before and during construction
Required For
Major changes to appearance or use
Almost all building work, even internal
Do You Need Both?
For most projects, yes. You will usually need:
Some smaller projects may fall under the permitted development rights, meaning planning permission isn’t required. However, building regulations almost always still apply.
There may also be other approvals to consider, such as listed building consent or environmental requirements.
A Common Mistake
Many homeowners believe that once planning permission is granted, construction can begin immediately. This is rarely the case. Even after approval, you’ll still need Building Control sign-off at key stages of the build.
Skipping approvals can result in:
Final Thoughts
Planning permission decides whether you’re allowed to build. Building regulations determine how it must be built.
Understanding both is essential for a smooth, compliant project.
Working with a qualified surveyor, architect, or technologist can save time, protect your investment, and prevent costly mistakes from the outset.
Need guidance on your project?
Whether you need planning permission for an extension, support navigating building regulations, or full project management, our team is here to help.
