One of the biggest worries homeowners face when planning an extension is: “Do I need planning permission?” The good news is that not every project requires it. Thanks to permitted development rights, you may be able to extend your home without going through a full planning application.
At Reltic Extend, we help families across London and Surrey navigate permitted development rules every day. In this guide, we’ll break down what permitted development is, when it applies, and how it can make your extension journey simpler and faster.
What Is Permitted Development?
Permitted development (often called PD rights) is a set of rules that allows homeowners to make certain changes to their property without applying for full planning permission.
This can include:
Single-storey rear extensions within specific size limits,
Side extensions that don’t exceed set heights and widths,
Loft conversions or outbuildings in some cases,
Changes that don’t significantly alter the look of the property.
💡 Want to see if your idea could qualify? Explore our Planning page for more details.
Why Permitted Development Matters
Using PD rights can save you:
Time – no waiting months for approval,
Money – no planning application fees,
Stress – fewer objections from neighbours if your project meets the rules,
Delays – faster start on construction.
However, it’s important to check the details carefully, as not every property qualifies.
Extensions That Often Fall Under Permitted Development
Rear Extensions
A Rear Extension is one of the most common projects under PD rights, provided it doesn’t extend too far into the garden or exceed height limits.
Side Extensions
In terraced or semi-detached homes, Side Extensions can usually be built without full permission if they stay within set width restrictions.
Wraparound Extensions
A Wraparound Extension often needs full permission because it combines both side and rear elements – but smaller versions may still qualify.
Double Storey Extensions
Most Double Storey Extensions require full permission, but PD rules sometimes apply for smaller two-storey additions.
When You Can’t Rely on Permitted Development
Permitted development doesn’t apply everywhere. You may need full planning permission if:
Your home is listed,
You live in a conservation area,
You’ve already extended beyond PD limits,
The design significantly alters the roofline or character of the property.
Our How We Work process ensures you know exactly which path applies before starting.
Mistakes Homeowners Make With PD
Each council interprets rules slightly differently, so your location matters:
North London – period homes often face tighter restrictions.
South London – wraparounds often need permission, even if parts qualify for PD.
East London – compact side extensions are more likely to qualify.
West London – double storey projects almost always need full permission.
Surrey – larger plots give more freedom, but PD rules still apply.
Why Work With a Design & Build Partner
Permitted development may sound simple, but professional guidance ensures you don’t run into problems. With Reltic Extend, you benefit from:
Expert design that maximises space while staying compliant,
Clear advice on when planning is needed,
Full support with applications if required,
Peace of mind knowing your project is legally secure.
See more about our approach on the Who We Are page.
Final Thoughts
Permitted development is one of the simplest ways to extend your home. But rules can be tricky – and making the wrong assumption could cost you time and money. With the right guidance, you can enjoy a smoother journey to your dream extension.
Why choose Reltic Extend?
By offering a complete service, we give you:
peace of mind – everything handled by one trusted team,
control – clear budgets and timelines,
value – a home extension designed to increase your property’s worth,
support – guidance at every step, from planning to handover.
Meet the people who make it happen on our Who We Are page.
Ready for a complete extension service?
Want to know if your project qualifies for permitted development?
👉 Visit our Planning page for expert guidance, or try our Cost Calculator to start budgeting today.
At Reltic Extend, we’ll help you extend your home the simple way.
