Site Constraint Checker
Use this when the project is not the real problem and you need to isolate the live planning constraint instead. It identifies the blocker, shows what usually tightens it, and points you to the next page worth opening.
Check The Live Constraint
Work through the prompts, then let the tool show which planning constraint is most active and where to go next.
What This Tool Is Good For
What it answers well
It helps when the project is already known but the real blocker is height, depth, boundary position, roof change, frontage sensitivity or local control.
What it improves
Instead of sending you into a generic guide, it narrows the rule family that deserves the next check.
Best next move
Use the result to open the first rule page that matches the blocker, then use the wider route tools if the answer is still mixed.
Questions People Usually Ask After The Result
Keep this block for the interpretation and trust questions that usually appear once the tool has narrowed the answer.
Is site constraint checker a final answer?
No. Site Constraint Checker is built to narrow the planning question quickly, not to replace the project guide, local authority layer or formal verification where certainty matters.
What details most often change the result?
The exact measurement point, the tightest edge of the site and any local control layered on top of the blocker are the details most likely to change the result.
When should I verify formally?
Check measured drawings before relying on the output if one blocker is doing almost all the work.
What page should I open next?
Open the matching rule page next, then move into the local project or council page if the blocker still depends on site context.
Why does local context still matter after the tool?
Because conservation areas, listed buildings, Article 4, planning history and council-specific judgement can still make a familiar-looking result less reliable on a real site.
Questions This Tool Is Best At Narrowing
- What is the real planning blocker here?
- Is height, depth or boundary position the main issue?
- Which rule should I check next?
How This Tool Fits Into The Wider Planning Process
Site Constraint Checker is intended as a fast planning triage step based on common UK planning considerations and permitted development limits.
Use it to narrow the question, then move into project guides, local authority pages or formal confirmation if the scheme is close to a limit. The tool should help you spend money in the right order, not tempt you to stop checking too early.
Need A More Tailored Steer Than The Tool Result?
If site constraint checker has narrowed the question but the answer still depends on your exact site, local authority area or project details, use the structured guidance form instead of relying on another broad rule of thumb.
Best for
Borderline, awkward or site-specific cases where broad guidance has helped, but the answer still turns on facts that are unique to your property or proposal.
What the reply aims to do
The reply aims to narrow the likely route, flag the tripwires that matter most, and tell you which verification step is safest before more money is spent.
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.
FAQ Pages Worth Opening After The Tool
How To Measure Height For Planning Permission
Useful when height is the controlling issue and the measurement method matters as much as the design.
Read answerHow To Measure Distance From Boundary
Helpful when siting and neighbour relationship are the practical issues that keep changing the answer.
Read answerDetailed Guidance Worth Opening Next
Depth Limits
Useful when projection or site spread is the first blocker.
Open guideHeight Limits
Open this when vertical scale is the main constraint.
Open guideBoundary Rules
Helpful when neighbour relationship or siting is the live issue.
Open guideRoof Alterations
Use this when visible roof change is the blocker.
Open guidePlanning Decision Engine
Helpful when the overall route still feels unresolved.
Open guidePlanning Route Planner
Use this next when the blocker is known but the approval path is still fuzzy.
Open guideUse These Tools Properly
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 reduce uncertainty quickly, point you to the next page that matters, and show when a broad tool result is still too weak to rely on for a live project decision.
What it does not replace
These tools do not replace formal confirmation for borderline schemes, local authority checking where special controls apply, or paid specialist input for genuinely complex cases.
How the guidance is built
Tool results are based on common planning and permitted development baselines, then framed to push you toward the project, local authority and rule pages most likely to settle the remaining doubt.
When to stop relying on broad guidance
Escalate when the route only works inside a tight threshold, when local controls may be doing most of the work, or when you need written certainty before drawings, applications or contractor spend.
Safest formal next step
Use the tool result as triage, then move into the matching guide. If certainty still matters, step up to a lawful development certificate, pre-application advice or professional help rather than rerunning broad checks.
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.