Planning Predictor
Get an instant, indicative read on how likely your London project is to gain planning permission — before you commit time or money.
What is the Planning Predictor?
The Planning Predictor is a free, interactive tool that gives you a quick, indicative estimate of how likely a project — such as a rear extension, loft conversion or new build — is to be granted planning permission, based on the details you enter. It's designed as a helpful starting point for homeowners and developers weighing up a project across London and Greater London. For a definitive view, our RIBA Chartered architects and planning consultants review your specific site, its planning history and local policy.
Three simple steps
Tell us about your project
Enter a few details about your property and what you'd like to build — an extension, loft conversion, new build or change of use.
Get an instant prediction
The tool returns an indicative likelihood of planning approval in seconds, based on the details you provide.
Speak to our architects
Use the result as a starting point, then book a free consultation for a proper assessment of your specific site.
Try the Planning Predictor
Enter your project details below to see an indicative planning approval prediction.
The Planning Predictor gives an indicative estimate only — it is not a formal planning assessment or a guarantee of approval. Every site, local plan and planning history is different. For a definitive view on your project, book a free consultation with our team.
Ready for a definitive answer?
Our RIBA Chartered architects will assess your project properly and give you clear, honest advice on the best route to approval.