How to Check Planning Applications Near a Flat Before You Buy

Nobody warns you about this one. You fall in love with a flat, the light is gorgeous, the view over the car park is actually quite pleasant, and you put in an offer. Then six months after you move in, a crane appears next door and you realise a fourteen storey block was approved before you even viewed the place.

This happens more than you'd think. Planning applications are public record, they're sitting there on the council's website waiting to be found, and most buyers never look. Solicitors won't always flag them either, unless you ask the right questions. So you need to do this yourself, and the good news is it's genuinely straightforward once you know where to look.

Every local planning authority in England runs its own portal. There's no single national database that shows you everything in one place, though the Planning Portal website at planningportal.co.uk does let you search by postcode and will redirect you to the right local authority.

Type the postcode of the flat into the Planning Portal search, click through to the local council's planning search, and you're in the right place. In London you also have the Greater London Authority's planning database for larger schemes, which is worth checking separately if you're buying anywhere in the capital.

Once you're on the local authority's planning search, look for a map view if one is available. Most councils offer one. It lets you draw a circle around the address and see every application in that area, which is far more useful than searching by street name alone.

Go back at least five years. That sounds like a lot, but here's why it matters. Planning permission in England typically lasts three years from the date of approval. A permission granted four years ago might still be live if the developer has started work, even just token groundworks, to keep it valid. You want to know what's been approved, not just what's currently pending.

Search within roughly two hundred metres of the flat. Anything closer than that is genuinely capable of affecting your light or your outlook. Beyond two hundred metres the impact on a specific flat becomes much harder to predict.

Filter your results to look for applications described as residential development, mixed use, or change of use. Also look for anything mentioning storeys, floors, or height. A planning application for a new build of five or more storeys within a hundred metres of your flat deserves serious attention.

Don't ignore refused applications either. A refusal today can become an approval on appeal or on a revised submission tomorrow. If a developer has already tried once to build something large next door, they may well try again.

Light is the big one. In England there's a legal concept called the right to light, which protects windows that have received daylight for at least twenty years. But this right belongs to the building, not to you personally, and it's complicated to enforce. Don't assume it protects you automatically.

What you can do is look at the planning application documents themselves. Every application for a significant development should include a daylight and sunlight assessment. These are technical reports that model how much light neighbouring properties will lose. They're public documents, they're attached to the planning application, and you can download and read them. Look for your specific flat's floor level in the report. A ground floor or first floor flat facing a new tall building is far more vulnerable than a top floor flat.

On value, the honest answer is that it depends. A new building that blocks your direct sunlight and turns your outlook into a brick wall is going to hurt resale appeal, full stop. How much is impossible to predict without knowing the specifics, but buyers notice light immediately when they view a property. If yours becomes noticeably darker, your pool of future buyers shrinks.

There's also a construction phase to think about. If a large development is approved next door, you could be living with noise, dust, and lorries for two or three years. That's not a reason to walk away necessarily, but it should factor into your negotiation on price.

When you click on an application, you'll see a list of documents. It looks overwhelming but you only need a few of them.

Start with the application form itself. It'll tell you what's being proposed, how many storeys, how many units, and the intended use. Then look for the design and access statement, which explains the scheme in plain English and usually includes drawings showing the height in context.

If there's a daylight and sunlight report, download it. Search the document for the address of the flat you're buying, or for the name of the street. Look for any table showing vertical sky component or average daylight factor results. These are the standard measurements used in these reports. The British Standard guidance suggests that if a room loses more than twenty percent of its existing daylight, that's considered a noticeable impact. The report will show whether neighbouring properties are predicted to breach that threshold.

Finally check the status of the application. Is it pending a decision, approved, refused, or withdrawn? If it's approved, check whether any conditions were attached that might affect the scheme's size or height.

Your solicitor will raise standard enquiries with the seller, but you should specifically ask them to confirm whether any planning applications within two hundred metres have been identified, and whether the seller is aware of any proposed developments nearby. Sellers have a duty not to mislead you, but they don't have to volunteer information you haven't asked for.

Also ask your solicitor to check whether the flat itself has any planning history. Sometimes a flat has been extended or altered without permission, which can cause problems when you come to sell.

If you find a significant pending application yourself, tell your solicitor and ask them to flag it formally in the transaction. You want it on the record that you knew about it and factored it into your decision, especially if you're negotiating a reduction in price as a result.

And if the application is for something really substantial, like a tall residential tower or a large commercial development, it may be worth paying a planning consultant for an hour of their time to give you an honest opinion on the likelihood of approval and the likely impact. That could cost you a few hundred pounds but it's cheap compared to buying a flat that loses half its light.

Run through these steps before you exchange contracts on any flat.

1. 1Go to planningportal.co.uk and find the local authority planning portal for the address.
2. 2Search by map within roughly two hundred metres of the flat.
3. 3Look at all applications from the last five years, not just current ones.
4. 4Filter for residential, mixed use, or tall building proposals.
5. 5Download and read any daylight and sunlight assessment attached to nearby applications.
6. 6Check the status of any significant application, pending, approved, or refused.
7. 7Ask your solicitor to formally raise nearby planning applications in their enquiries.
8. 8If anything looks serious, get a short opinion from a planning consultant before you commit.