Know Your HomeWe analyse the largest and most complex public datasets that describe homes in England and Wales, from flooding and subsidence to heat, energy and what you might be able to build.
The house sits above a lower part of the road where surface water can collect during very heavy rain.
Shrinkable clay and a mature tree nearby could be relevant if you’re seeing cracks or movement.
The main roof has a useful south-west facing area with relatively little surrounding shade.
The neighbour added a rear dormer under permitted development, with no planning application.
A conservation area boundary runs between the two houses, so the same dormer here would need full planning permission.
The Article 4 direction only covers roof slopes facing the street, and the conservation area appraisal treats rear roofs as less sensitive. A rear dormer set back from the eaves, in matching slate, is the version most likely to be approved.
A rear extension was approved on a neighbouring plot in this example.
Look at the layout, height and distance from the boundary alongside your own plot.
The approved drawings and conditions can help shape your proposal. Permission here would still need its own assessment.
We measure distances, trace the shape of the land and check specialist datasets for the individual property.
Choose the modules you want, or ask us a specific question about the house.
We find the exact property and surrounding ones. If our data is not available for your address, we will give you a full refund.
With you within 24 hours: what we found, what it means and anything worth checking next.
We combine years of experience in weather data modelling, architecture and consultancy with our own data platform, which processes large volumes of public data into useful, actionable insights for your address.
Yes, it is all ultimately public data. However, most of it needs complex software to open, interpret and use, and the consultancy and recommendations are ours. Every source is listed below.
No. We won’t visit you. A survey covers the building’s condition. This covers the ground and weather data around it.
We won’t predict what your house will be worth, or tell you it will flood. Nobody can. We also won’t take money from anyone we recommend.
Full refund. Coverage across England and Wales is strong, but if we can’t locate your exact building, you get your money back.
We use information from government, scientific and property datasets, then bring it together for the individual home.
We’ll also tell you when the data isn’t enough to answer the question. This isn’t a survey or a substitute for professional advice.
50+ sources analysed
Enter an address and see what’s worth knowing about the property.