Southwark is one of London's most complex boroughs to navigate for planning permission. Conservation areas, private estate controls, Article 4 Directions, listed buildings, and flood zones all overlap in ways that make borough-wide approval rates almost meaningless — until you find out what your specific address is up against, free in about a minute.
The short version
- Southwark has multiple conservation areas, Article 4 Directions, and a unique private scheme in Dulwich — all affecting what you can do without permission
- Your neighbour getting approval doesn't mean you will — constraints can differ street by street
- The £548 householder application fee is non-refundable whether you're approved or refused
Your postcode is just the start of the puzzle
SE22 and SE15 feel like similar south London streets, but they can sit in completely different planning environments. Dulwich Village doesn't just have conservation area rules — it has the Dulwich Estate Scheme of Management layering private controls on top of standard planning requirements. Most homeowners only discover this after they've already made plans.
Across Southwark's Victorian terraces, Article 4 Directions remove permitted development rights that homeowners in other boroughs take for granted. This means projects that wouldn't need permission elsewhere in England require a full application here — and come with a genuine risk of refusal.
What your neighbour's extension tells you — and doesn't
It's tempting to look at a similar house on your street and assume your project has the same chance. But even within the same road, constraints can differ. One side of the street might be inside a conservation area boundary while the other isn't. One property might be a listed building. A flood zone can run through part of a road but not all of it.
More importantly, what got approved five years ago on your street reflects the planning officer, the application design, and the policy context at that time — not necessarily what will get approved for your project today. The best way to understand whether a nearby precedent actually works in your favour is to check how similar applications near your property were decided.
Worth knowing
Southwark's listed buildings are concentrated along the Thames frontage and around Southwark Cathedral, but listed status can extend to structures and curtilage features you might not expect. If your property is anywhere near a listed building, it's worth checking before assuming standard rules apply.
The combinations that catch people out
It's rarely one constraint that causes a refusal — it's the combination. A property in a conservation area is one thing. A property in a conservation area, on a road covered by an Article 4 Direction, within a flood zone, next to a listed building, is a very different proposition. Southwark has areas where several of these stack on top of each other, and most homeowners don't realise they're sitting in one of them.
The £548 application fee is non-refundable. A refusal also goes on the planning record for your property. Neither outcome is the end of the world, but both are worth avoiding if the constraints were always going to make your project a difficult sell.
What actually determines your odds
Borough-wide statistics don't tell you whether your specific project type — a rear extension, a loft conversion, a new outbuilding — has a good track record on your street. What does tell you is the actual decision history for comparable applications near your address, and how your property's constraint mix has affected outcomes for your neighbours.
WhatCanIBuild pulls that decision history together so you can see your approval odds for your project type and what nearby decisions mean for your application — no signup needed.
Want a detailed planning report?
Get a personalised report covering constraints, precedents, and approval odds for your project.
See a sample report