How PlanWise Works
We combine comprehensive UK planning policy data with intelligent AI to give you clear, actionable advice in seconds rather than weeks.
You Describe Your Plans
Use plain English to tell us what you want to do. Whether it's a rear extension, loft conversion, new outbuilding, or change of use, simply describe your project and your property.
- No technical language required
- Optionally provide your address or postcode for location-specific guidance
- Indicate any known designations (Conservation Area, Listed Building, Green Belt)
We Analyse Against Policy
Your query is analysed against the full body of current UK planning legislation and guidance, including the NPPF, GPDO, Use Classes Order, and relevant case law principles.
- National Planning Policy Framework (NPPF)
- Town and Country Planning (General Permitted Development) Order 2015 (as amended)
- The Use Classes Order
- National design guidance and best practice
AI Generates Your Advice
Our AI processes your specific query in the context of the relevant regulations and produces a structured, easy-to-understand response covering permitted development rights, key considerations, and recommended next steps.
- Structured responses with clear sections
- Permitted development assessment
- Key considerations and limitations
- Actionable next steps
You Plan With Confidence
Armed with reliable preliminary guidance, you can make informed decisions about your project. You'll know whether you likely need to apply for planning permission or can proceed under permitted development.
- Understand your position before paying for professional advice
- Know which questions to ask a consultant
- Decide whether a formal application is needed
- Move forward with clarity
Built on authoritative sources
PlanWise draws from the same legislation and guidance that professional planners use.
National Planning Policy Framework
The government's planning policies for England and how they should be applied.
General Permitted Development Order
Defines permitted development rights for householders and other types of development.
Planning Practice Guidance
Government guidance on how to apply planning policy in practice across all development types.
Use Classes Order
Categorises land and buildings into different use classes relevant to change-of-use applications.
Important Limitations
PlanWise is designed to give you a strong starting point, but please keep the following in mind:
- PlanWise provides general guidance and does not constitute formal legal or professional planning advice.
- Local authorities may have Article 4 Directions or local policies that restrict permitted development rights beyond national legislation.
- The advice given is based on the information you provide — incomplete or inaccurate details may lead to incomplete advice.
- For definitive answers, always consult your Local Planning Authority or a qualified planning consultant.
- Building Regulations approval may still be required even where planning permission is not.
Ready to get answers?
Try PlanWise now and get instant guidance on your UK planning permission questions.
Launch the Advisor