Planning rules & permissions

Planning rules can feel confusing at first - especially when terms like permitted development, Lawful Development Certificates, conservation areas and Green Belt start appearing. This section explains how the planning system affects home extensions, when formal permission is required, and where additional restrictions may apply. The aim is simple: help you understand the rules early, so you can move forward with clarity and fewer surprises.

A guide to Lawful Development Certificates

A straightforward guide to Lawful Development Certificates, covering costs, timescales, and when one can give peace of mind before you build.

Permitted development vs planning permission: what’s the difference?

Understand the difference between permitted development and planning permission, when each applies, and how to choose the right route for your home project.

Why flood risk matters more than ever when planning an extension

Flood risk can affect whether your extension is approved, how it must be designed, and whether additional assessments are required.

What you need to know about building an extension on green belt land

The rules for development on Green Belt land are much stricter than in other areas so you'll need to tread carefully.

What you need to know about building an extension in a conservation area

Thinking of extending your home? If your property is in a conservation area, there are a few extra hurdles you’ll need to consider.

Everything you need to know about building an extension in an Area of Outstanding Natural Beauty

If your property lies within an Area of Outstanding Natural Beauty, you’ll need to take extra care when planning any kind of building work.