Two Storey Extension Across Wales
Use this page to compare the local authority layer for two storey extension across Wales, find the councils worth checking first and open the rule pages that usually change the answer.
Read This Area Project Page In The Order That Saves You Time
What This Area Project Page Is For
What usually applies
Start with the local page for the council area you care about, because the national baseline is only half the answer once local restrictions matter.
What often changes it
Conservation areas, Article 4, listed buildings, local design expectations and the exact dimensions of the scheme can all change the route.
Best next step
Compare the 25 council areas below, then open the local project guide and the rule page that looks most likely to decide the answer for your site.
When This Area Comparison Usually Helps And When You Should Go Straight To A Local Page
Usually enough for a first pass when
- You are still comparing councils and have not narrowed the project to one site-specific route yet.
- The uncertainty is about where two storey extension feels more sensitive rather than whether one exact drawing already works.
- You want to understand the likely local pressure points before paying for more detailed design work.
Go more local when
- One council area, one conservation area or one exact property constraint is already doing most of the work.
- The scheme is close to a height, boundary, roof or visibility limit.
- You need a reliable route decision rather than a comparison-led briefing.
What usually settles it faster
- Open the matching local project guide for the correct council below.
- Pair it with the rule page that looks most likely to block or change the route.
- If the scheme is borderline, move to measured drawings and written confirmation rather than relying on comparison alone.
Two Storey Extension Topics Worth Checking Across Wales
Planning Permission
Useful when planning permission is the question most likely to change the answer for two storey extension in places like Isle of Anglesey.
Open topic hubPermitted Development Rights
Useful when permitted development rights is the question most likely to change the answer for two storey extension in places like Gwynedd.
Open topic hubHeight Limits
Useful when height limits is the question most likely to change the answer for two storey extension in places like Conwy.
Open topic hubBoundary Distance Rules
Useful when boundary distance rules is the question most likely to change the answer for two storey extension in places like Denbighshire.
Open topic hubConservation Area Restrictions
Useful when conservation area restrictions is the question most likely to change the answer for two storey extension in places like Flintshire.
Open topic hubHow The Same Project Can Feel Different Across One Planning Area
Planning rules for two storey extension in Wales still sit on the same national baseline, but the confidence you can place in that baseline changes once local designations, property context and authority interpretation enter the picture.
This area hub is designed to make that local layer easier to compare before you commit to one planning route.
What Usually Deserves A Closer Look In Wales
- Urban and heritage-sensitive authority areas often feel stricter even where the national rule sounds similar.
- Projects close to a boundary, roof limit or visual-impact threshold are more likely to need a careful local check.
- Where the local route still feels uncertain, comparing one or two neighbouring councils often clarifies the real issue.
What To Do If You Still Need A Faster Answer
Explore project types first
Use the explorer if you are still deciding what kind of build is most realistic for this property before you compare councils in detail.
Explore optionsRun the quick planning tool
Use the main planning decision tool when you need a first steer before comparing the local pages in detail.
Open toolAnalyse the likely refusal risks
Use the risk analyzer when the proposal is taking shape and you want to stress-test the main reasons it could be refused.
Open analyzerSee the wider Wales planning hub
Use the area page to switch from this project to broader council and topic navigation.
Open area hubRead the core planning permission answer
Open the FAQ when the uncertainty is still about the overall route rather than the local layer.
Read answerMore Area Comparisons And Related Follow-Ups
Use these only after the local authority route and main next steps above. They are helpful, but they should not compete with the primary answer.
Show more rule comparisons, nearby area hubs and related project alternatives
Rule Pages That Usually Decide The Next Step
Nearby Area Project Hubs
Bedfordshire
Compare two storey extension guidance in Bedfordshire when you want broader local context.
Compare areaBerkshire
Compare two storey extension guidance in Berkshire when you want broader local context.
Compare areaBuckinghamshire
Compare two storey extension guidance in Buckinghamshire when you want broader local context.
Compare areaCambridgeshire
Compare two storey extension guidance in Cambridgeshire when you want broader local context.
Compare areaCornwall
Compare two storey extension guidance in Cornwall when you want broader local context.
Compare areaCounty Durham
Compare two storey extension guidance in County Durham when you want broader local context.
Compare areaCumbria
Compare two storey extension guidance in Cumbria when you want broader local context.
Compare areaDerbyshire
Compare two storey extension guidance in Derbyshire when you want broader local context.
Compare areaHow To Use This Area Project Guide Responsibly
This page is designed to help you compare two storey extension planning permission guidance across Wales without pretending that one area-level summary can replace a site-specific planning check. Use it to find the right authority path faster, then verify the live scheme where the local route still looks borderline.
What it is good for
- Finding the right council area quickly.
- Comparing where the local layer may matter most.
- Finding the next project or rule page worth opening.
Still worth verifying
- Exact dimensions and site history.
- Whether heritage or Article 4 controls apply.
- Whether a borderline scheme needs written confirmation.