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

Getting refused planning permission in Merton isn't rare — and the reasons are rarely the ones homeowners anticipated. Most people assume their project is straightforward until it isn't, and by then they've already paid the £548 application fee and waited weeks for a decision.

Character and appearance — and why it's not as simple as it sounds

One of the most frequent grounds for refusal in Merton is that a proposal would harm the character or appearance of the area. That sounds vague — and that's exactly the problem. What harms character in Wimbledon Village is completely different from what might be acceptable in a Victorian terrace in Mitcham or Colliers Wood.

The borough's Edwardian housing stock around Wimbledon is particularly sensitive. Extensions that sail through in one postcode get refused in another because the design language, materials, or scale don't match what planners have come to expect for that street. Most homeowners don't realise just how hyperlocal these judgements are.

Conservation areas, Article 4 Directions, and listed buildings

Merton has multiple conservation areas — Wimbledon Village, Wimbledon Common, Mitcham Cricket Green, Cannizaro Park, and others — and each one has its own character appraisal that shapes how applications are assessed. Being inside one of these areas changes almost everything about what's likely to be approved.

Article 4 Directions in parts of Wimbledon Village remove permitted development rights that homeowners elsewhere take for granted. That means works you might assume don't need permission actually do — and if you don't realise that before you start, you could be building without consent.

Near Wimbledon Common, listed buildings add another layer of complexity entirely. Even works to a property near a listed building — not just the building itself — can attract scrutiny. The best way to know whether any of this applies to your specific address is to check what constraints are actually layered onto your property.

Neighbour impact — the refusal reason people underestimate

Loss of light, overlooking, and overbearing impact are consistently cited in refusals across the borough. These aren't just tick-box concerns — planners in Merton weigh them seriously, particularly in denser areas where properties are close together.

The tricky part is that these assessments aren't purely technical. They involve judgement calls about what's acceptable given the specific relationship between your property and your neighbours'. Two identical extensions can produce different outcomes depending on the orientation of the plot, the height of existing boundary treatment, and what's already been approved nearby.

What actually gets approved on your street?

Refusal reasons are almost always property-specific. Knowing you're in a conservation area doesn't tell you what that means for your proposed rear extension. Knowing your house is Edwardian doesn't tell you what materials planners will accept.

The hard questions — what's been approved and refused on your street, what your specific combination of constraints means for your odds, whether the precedent exists nearby to support your application — are the ones most homeowners can't answer without real data. With WhatCanIBuild, you can see the approval record near your address and what it means for your project — free, no signup needed.