How UK Planning Guide Builds Its Guidance
The site keeps three jobs separate: the national planning baseline, the local authority layer and the point where broad guidance stops being enough on its own. That separation is what keeps the content useful without overclaiming certainty.
How The Guidance Is Built And Why The Layers Stay Deliberately Separate
National baseline first
Project guides start with the planning position that commonly applies nationally, including the usual permitted development principles, thresholds and common route questions.
Local layer second
Local project, council and area pages then layer in authority context such as conservation areas, listed building controls, Article 4, local policy pressure and council-specific friction points.
Rule page when needed
Scenario hubs and rule pages isolate the one issue that is actually blocking progress, such as height, boundary position, conservation-area effect or whether permitted development still survives.
Editorial And Source Standards
- Pages should answer a real planning question in plain English.
- Tools should improve the next decision, not just create another click.
- FAQ pages should cover process, restrictions and verification points people genuinely get stuck on.
- Where an answer depends on measurements, planning history or special controls, the page should say so plainly.
What Users Should Still Verify Before They Spend Money
- Exact dimensions, overall site coverage and roof heights.
- Whether previous extensions or outbuildings have already used development allowances.
- Whether the property is listed, in a conservation area or affected by an Article 4 direction.
- Whether a separate consent is needed, such as listed building consent, highway approval or building regulations approval.
If a proposal is close to a limit or there is any doubt about the planning route, a lawful development certificate or pre-application advice is usually more valuable than relying on assumptions.
How The Method Signals Trust Without Pretending To Be Final
Rules vary by location
Planning routes can change by council area, property history, designations and the exact proposal. Use this page as a structured guide to the next check, not as a blanket approval.
What this page is for
To show where the likely baseline comes from, what local factors usually move it, and which page or formal route is safest once the answer stops being routine.
What it does not replace
The method does not replace the local planning authority record, official designation checks, or formal specialist input where site-specific evidence and design judgement are doing most of the work.
How the guidance is built
The site works from the national baseline first, layers in local authority context second, and then adds page-specific tripwires such as height, siting, use intensity, heritage sensitivity and previous additions.
When to stop relying on broad guidance
Escalate once the route depends on a tight measurement, a sensitive designation, an uncertain planning history or an interpretation you would not want to defend after money has been spent.
Safest formal next step
Use a lawful development certificate when certainty matters around an apparently lawful scheme. Use pre-application advice when the council's planning judgement is likely to matter more than the headline rule.
Official-source check
Where this page shows official sources, use those links near the relevant answer to confirm the latest council or national wording before relying on a borderline route.
Want The Method Applied To A Specific Project?
The methodology explains how the site reasons about planning risk. If you want that logic applied to your own facts, the personalised guidance route is the cleanest next step.
Best for
Cases where you understand the broad method already but want it applied to your own drawings, property history or local sensitivity.
What the reply aims to do
The reply aims to turn the site method into a project-specific informational steer, including where the answer still needs a certificate, pre-app advice or other formal confirmation.
What to include
Property type, council area, location, the change you want to make, approximate dimensions, relevant heritage or flat-related details, previous additions and the main concern.
Important: Replies are informational personalised guidance based on the details you provide and publicly available information. They are not formal legal, architectural, surveying or council advice. Site-specific or borderline cases may still need checking with the local authority or a qualified specialist before drawings, applications or contractor spend move ahead.
Your enquiry details are used to respond to your request. Anonymised themes may be used to improve guides, tools, FAQs and site content. Identifiable case details are not published without permission, and sending an enquiry does not sign you up to marketing emails. Privacy notice.
Useful Entry Points
Planning Permission hub
Start with the broad planning route when you need the main rule first.
Open hubPermitted Development hub
Check the usual PD baseline before moving into project detail.
Open hubPersonalised planning guidance
Use the structured request form for a practical case-specific steer on the likely route, local tripwires and what to verify next.
See how it worksPlanning decision tool
Get a fast first-pass answer before you compare detailed guidance.
Open toolDo I need planning permission?
Read the core answer to the most common planning question.
Read answer