How likely is my planning application to get approved in Hounslow?

Plenty of homeowners in Hounslow assume that if their neighbour got permission, they probably will too. It's a reasonable assumption. It's also frequently wrong.

Approval odds in Hounslow shift depending on factors most people never think to check — and the difference between a smooth approval and a refusal often comes down to details specific to your street, your plot, or even your side of the road. If you want to cut through the guesswork early, WhatCanIBuild can show you what's actually been approved and refused near your property — and why.

Your postcode is only the starting point

Hounslow covers a wide area — from W4 and TW8 in the east to TW13 and TW14 further west. That geographical spread means planning conditions vary enormously across the borough. A project that sails through in one part of Hounslow can run into serious resistance a few streets away.

Most homeowners don't realise that their property might sit within — or right on the edge of — a designated area that changes what they can and can't do. Conservation areas, flood zones, the buffer zone around Kew Gardens UNESCO World Heritage Site: each one layers on additional scrutiny. Whether your property is affected, and how much, isn't something you can judge from a postcode alone.

Permitted development isn't always available

A lot of homeowners start from the assumption that certain projects — loft conversions, extensions, outbuildings — don't need planning permission because they fall under permitted development. Sometimes that's true. But Article 4 directions, which are in place in parts of Hounslow including Gunnersbury and Bedford Park, can remove those rights entirely.

If your property sits within one of those areas, projects that would normally be permitted development elsewhere in the borough suddenly require a full application. And if you submit without knowing that, you're already behind.

The question isn't just whether Article 4 applies somewhere in Hounslow — it's whether it applies to your property specifically.

What approval rates don't tell you

It's tempting to look for an overall Hounslow approval rate and use that as your benchmark. But borough-wide figures mask the variation underneath. A project type with a high overall approval rate might have a much lower rate in a conservation area, or for properties on a particular street, or for applications that came in without pre-application advice.

What actually predicts your outcome isn't a headline statistic — it's the pattern of decisions on similar projects near your property. What got approved on your road? What got refused, and on what grounds? That's the information that actually matters, and it's not something most homeowners have easy access to.

WhatCanIBuild pulls together exactly that: what's been approved and refused nearby, what constraints apply to your specific property, and what your approval odds look like for your project type in your area. That's a very different picture from anything a general guide can give you.

The honest answer to "how likely is my application to get approved in Hounslow?" is: it depends on your property. The best way to find out is to check.