What are the most common reasons planning applications get refused in Wandsworth?

Getting refused isn't just bad luck. In Wandsworth, planning decisions are shaped by a dense web of local policies, conservation area rules, and street-level precedents that catch homeowners off guard every year. Most people don't realise how much rides on the specific details of their property — not just the general rules. If you want to cut through the noise early, WhatCanIBuild can show you what's actually been approved and refused near your address.

Conservation areas are not all the same

Wandsworth has 46 conservation areas covering postcodes from SW11 to SW18. Most homeowners know their street is in one — but that's where their knowledge stops. What they don't know is which specific restrictions apply to their property within that conservation area, and how officers are currently interpreting them.

A rear extension that sailed through on the next street might hit resistance on yours. The same design, the same size, a different outcome. That's not inconsistency — that's how character-based assessments work. The question isn't whether you're in a conservation area. It's what that actually means for your project.

Article 4 directions catch people by surprise

In many of Wandsworth's conservation areas, Article 4 directions remove permitted development rights that homeowners elsewhere take for granted. Windows, doors, roofing materials, chimneys, boundary treatments — these can all require full planning permission on affected streets, even for changes that seem minor.

Most homeowners don't realise their property is affected until they've already started work or submitted an application. At that point, the damage is done. Whether your address falls within an Article 4 direction — and which specific elements it covers — isn't something you can assume. It depends on your property.

The development plan cuts both ways

Planning applications in Wandsworth have to be decided in line with the council's development plan. That means planning officers and councillors are weighing your proposal against a framework of policies — and those policies cover everything from the number and size of buildings to their appearance, the impact on neighbouring amenities, and the character of the surrounding area.

Where applications fail, it's often not one big problem — it's a combination of smaller issues that together tip the balance. An overlooking concern here, a design detail there, a precedent from a nearby refusal that an officer quietly factors in. These aren't things you can easily identify in advance without knowing what's happened on your street.

What your neighbours' applications can tell you

One of the most useful things to understand before you apply is what's actually been approved and refused nearby — and why. Not in theory. On your road, for your project type, in recent years. That pattern of decisions is often more revealing than any policy document.

WhatCanIBuild surfaces exactly this: what's been approved and refused near your address, your likely approval odds for your specific project type, and how your property's combination of constraints shapes your chances. It's the best way to understand what you're actually walking into before you commit to an application fee or an architect.

Most homeowners find that what looks simple on the surface is more complicated once you look at the specifics. The best way to know where you stand is to check your address before anything else.