ePrivacy and GPDR Cookie Consent by Cookie Consent Full planning, lawful development & prior approval: A guide

Explained: full planning, lawful development, and prior approval

5 min read
Oct '25 • by Heather

Quick summary

In the UK, a full planning application typically costs around £190 to £206 and takes about eight weeks, but it varies by location. It’s needed for projects outside permitted development rights, such as large extensions or overdevelopment. If your project is straightforward, permitted development rights and prior approval may apply, often costing less and taking less time, but some restrictions and property types are excluded.

Whether you’re extending or converting, there’s one word that hangs heavy over any residential project: planning.

If you’ve never navigated UK planning policies before, the prospect can be daunting. What approval do you need? What can you accomplish without it? If these questions have you scratching your head (especially in light of the 2020 planning changes), don’t worry!

With our own team of planning agents and experts, we’ve put together this handy guide…

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