Planning permission in Stevenage feels like it should be straightforward — you submit, they decide, job done. But whether your application gets approved depends on a web of overlapping factors that vary not just by borough, but by street, and sometimes by individual property. Most homeowners don't realise how much is working for or against them before they've even drafted a single form. WhatCanIBuild can show you what's actually been approved and refused near your address — and what that means for your project.
The short version
- Stevenage has 7 conservation areas, 130 listed buildings, and Green Belt land — each one changes the rules for your property
- Approval odds aren't borough-wide averages — they're shaped by your specific address and project type
- What happened on your street matters more than general guidance
Your postcode isn't enough information
SG1 and SG2 cover a huge mix of property types, planning histories, and local designations. Being in Stevenage tells you almost nothing about whether your extension, outbuilding, or conversion will sail through or get refused. The borough has 7 conservation areas, and if your property sits within one — or even near one — the rules shift in ways that aren't obvious from the outside. Add in Green Belt designations that cover parts of the borough, and suddenly a project that looked simple becomes one that needs careful handling.
And that's before you factor in Article 4 directions, which can remove permitted development rights from certain streets or property types without any obvious signposting. Most homeowners only find out they're affected after they've already started planning.
Listed buildings change everything
Stevenage has 130 listed buildings on record. If your property is listed — or if it's been subdivided from one, or sits in the curtilage of one — the constraints go well beyond standard planning rules. Even internal works can require listed building consent. The question isn't just whether you're in a conservation area; it's whether your specific property carries designations that fundamentally alter what's permissible.
Don't assume
Being told your area is "generally fine for extensions" means nothing if your individual property has constraints that override the general position. It depends on your property — not your neighbour's, not your street's reputation.
What actually predicts approval
The best predictor of whether your application will be approved isn't the national guidance — it's what Stevenage Borough Council has approved and refused for similar projects on similar properties nearby. A rear extension on one road might have a strong track record. The same project two streets away, in a conservation area or affected by a local design requirement, might have a history of refusals. That pattern exists in the data. The question is whether you can see it before you commit £548 to an application fee and eight weeks of waiting.
The best way to understand your real approval odds is to look at what's actually happened near your address — not just what the rules theoretically allow. WhatCanIBuild pulls together that local decision history so you can see how projects like yours have fared in your part of Stevenage, and what constraints are working in the background on your specific property.
Before you apply
The £548 application fee is non-refundable. The eight-week decision window is eight weeks of uncertainty. And a refusal on your planning history can complicate future applications. Going in without understanding your property's specific position — its designations, its neighbours' precedents, its local approval pattern — is a risk most homeowners underestimate.
WhatCanIBuild gives you the picture your address actually reveals: the constraints, the nearby decisions, and the approval odds for your type of project. Not a generic answer — a property-specific one.
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