What planning rules in Wandsworth catch homeowners out?

Wandsworth looks straightforward on a map. But its planning rules are anything but. With 46 conservation areas, widespread Article 4 directions, and constraints that vary street by street — sometimes property by property — what's fine for your neighbour might need full planning permission for you. WhatCanIBuild exists precisely because these layers are almost impossible to untangle without checking your specific address.

Conservation areas don't work the way most people think

Most homeowners know that conservation areas come with extra rules. What they don't realise is how far those rules reach. In Wandsworth, Article 4 directions in many conservation areas specifically cover things like windows, doors, roofing, chimneys, and boundary treatments — the exact things people tend to assume are straightforward.

That means work you'd normally carry out without a second thought — swapping out a front door, replacing windows, changing your roof tiles — could require a full planning application. And the rules aren't uniform across all 46 conservation areas. What applies in Battersea isn't necessarily what applies in Balham or Putney.

Most homeowners in affected streets have no idea this applies to them until they've already started work.

Permitted development rights aren't guaranteed

Permitted development rights — the rights that allow you to build certain extensions, loft conversions, or outbuildings without applying for planning permission — sound reassuring. In practice, they come with conditions and limitations that vary based on your property's specific situation.

Flats and maisonettes don't get the same rights as houses. Properties created through previous permitted development changes often can't use householder permitted development for further work. And if an Article 4 direction has been applied to your street, rights you assumed were yours may have been quietly removed.

The question isn't just whether permitted development rights exist in theory. It's whether they apply to your property, on your street, with your property's history. That's a different question entirely — and it's the one most homeowners skip.

The gap between knowing your constraints and knowing your chances

Even homeowners who know they're in a conservation area, or who've discovered an Article 4 direction applies, are usually still in the dark about what that actually means for their specific project. Being in a conservation area tells you the rules are stricter. It doesn't tell you whether your rear extension, loft conversion, or outbuilding is likely to be approved or refused — and why.

That's where most people get stuck. The difference between a £258 householder application that sails through in 8 weeks and one that gets refused — and costs you far more in time, redesign fees, and delays — often comes down to details you can't see from a council map.

The best way to understand what's actually been approved and refused on your street, and what your specific combination of constraints means for your project, is to use WhatCanIBuild. It surfaces the things this article deliberately can't tell you — because they depend entirely on your address.

Enter your address to see what applies to your property in Wandsworth. WhatCanIBuild shows you the approval picture for projects like yours, not just the rules in the abstract.