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

You've done your research, you think your project is straightforward, and then the refusal letter arrives. It happens more than most homeowners in Stevenage expect — and often for reasons that had nothing to do with the size or design of the project itself. Understanding why applications get refused is one thing; knowing whether those reasons apply to your property is something else entirely. WhatCanIBuild can show you what's actually been approved and refused near you, and what that means for your chances.

"It looked fine to me" — why character and appearance catch people out

One of the most common reasons applications are refused in Stevenage isn't that the project was too big — it's that it was considered out of keeping with the character of the area. That's a judgment call, and it's one that varies street by street. What was approved two roads over might be refused on yours. Most homeowners don't realise how much weight Stevenage Borough Council places on local character when assessing applications, or how differently that plays out depending on exactly where you live.

Conservation areas and listed buildings — the rules most people don't check

Stevenage has 7 conservation areas. If your property sits within one — or even near one — the rules around what you can do without permission, and what's likely to be approved, shift considerably. The borough also has 130 listed buildings on record, and listing affects not just the building itself but sometimes the land and structures around it.

Most homeowners don't find out they're in a conservation area until they're already mid-application. And knowing you're in one is only the start — what it actually means for your specific project is a different question altogether. WhatCanIBuild is the best way to understand how your property's particular combination of constraints affects your real-world approval odds, not just whether a constraint exists.

Overlooking, privacy, and impact on neighbours

Among the most frequently cited reasons for refusal across the country — and Stevenage is no exception — are concerns about the impact on neighbouring properties. Overlooking, loss of light, and overbearing appearance are all grounds for refusal, and they're assessed case by case. The same rear extension that sailed through next door might be refused on yours because of how the gardens are oriented, or where a neighbouring window sits.

The precedent problem

Planning decisions don't exist in isolation. What's been approved or refused on your street — and why — creates a local precedent that weighs on future decisions. This is something most applicants never think to check, and it's genuinely hard to investigate without the right data.

That's exactly what WhatCanIBuild surfaces: real decisions on similar projects near your address, and what they reveal about your own chances. Not just the rules in the abstract — but what's actually happening on the ground in Stevenage right now.