HU10, East Riding of Yorkshire

Recorded street-level crime within the search radius, weighted by offence type (violence and robbery x2, ASB x0.5), per km² per month, placed on a log scale from 1 (scores 100) to 300 (scores 0).

• Counts recorded crime by location, not risk to any individual; busy city centres score lower because of footfall.
• Locations are anonymised to nearby map points by the police.

Confidence: high. Source: data.police.uk. How we score this

Starts from the Environment Agency flood zone (Zone 1: 95, Zone 2: 60, Zone 3: 25), minus 10 if a flood warning area lies within 1 km (5 if only an alert area), minus 15 per active flood warning and 5 per active alert; a severe warning caps the score at 10.

• Flood zones show the chance of river or sea flooding ignoring defences; they do not cover surface water or groundwater.
• This is not a flood search. Use a professional search before buying.

Confidence: high. Source: Environment Agency. How we score this

The SAP energy efficiency rating from the EPC (1-100, the number behind bands A-G): the property's own certificate when we can match the address, otherwise the median of the latest certificate for each property in the postcode.

• Certificates last ten years and may predate later improvements.

Confidence: medium. Source: EPC register. How we score this

50 + 2.5 x the percentage change in median sale price between the last 12 months and the 12 months before (so +20% scores 100 and -20% scores 0).

• Measures recent price momentum, not value for money or affordability, and is not a forecast.
• Medians move with the mix of homes sold as well as with prices.

Confidence: high. Source: HM Land Registry. How we score this

A weighted count of premises on the Food Standards Agency register within the radius (supermarkets x3, schools x2, cafés, restaurants, pubs and care settings x1, takeaways and other shops x0.5), scored as 100 x (1 - e^(-count / 80)).

• The FSA register lists businesses that handle food, so it is a proxy for local amenities: parks, GP surgeries and gyms are not included.

Confidence: medium. Source: Food Standards Agency. How we score this

0.55 x a rapid-transit component (the better of: rail station 100 within 500 m falling to 0 at 4 km; metro/tram stop 100 within 500 m falling to 0 at 2 km) plus 0.45 x a bus component (12.5 points per stop within 400 m, up to 100).

• NaPTAN lists stops, not how often services run.

Confidence: medium. Source: NaPTAN. How we score this