How the figures are worked out

Every page is built from public data, without estimates or scores of our own. This page says how each figure is put together, so you can judge what it means and what it does not. The sources themselves, their dates and licences are listed on About the data.

What a street is

A street is a USRN: the unique street reference number every road in Great Britain has in the national street gazetteer. Its addresses are the UPRNs (unique property reference numbers) that Ordnance Survey's Open Linked Identifiers place on it, and its postcodes are those addresses' postcodes in the ONS UPRN Directory.

• Name. From OS Open Roads, through the road links that make up the street. Where Open Roads has no name, the street name used in the Land Registry's sales on its postcodes, when they agree on one and no neighbouring street already has it. Otherwise the page says "Unnamed street".
• Town. The place OS Open Names gives for a named road of the same name over the street; failing that, the nearest settlement within 3 km.
• The middle of the street. The centre of its geometry in OS Open USRN, or, without one, the average position of its postcodes weighted by how many of its addresses each holds. Distances below are straight lines from this point.

A long road is often several streets, one per stretch or per council, so its page may cover only part of it.

Sales

Sales come from HM Land Registry Price Paid Data. A sale is counted on a street when its postcode is one of the street's postcodes and the street name in the sale record is the street's name. A sale recorded with a different spelling, or on a postcode the street does not share, is missed.

• The list shows the most recent 200 sales.
• The yearly figures (number of sales, median, lowest and highest) use standard sales only: sales at full market value to a private buyer. "Additional" sales (repossessions and other transfers under a power of sale, buy-to-let purchases the Land Registry can identify by their mortgage, and sales to companies and other non-private buyers) are listed but left out of the medians.
• The median is the middle price of the year's sales: half sold for less, half for more. With few sales a single house moves it a lot.
• Sales reach the register two weeks to two months after completion, so the last two months are always incomplete.

Energy ratings

From the Energy Performance of Buildings Register. For each address on the street, only its most recent certificate counts. The band mix, property types, construction ages, tenure and the median floor area are counted over those certificates. Certificates without a UPRN cannot be placed on a street and are left out. Homes that have never needed a certificate do not appear at all, and a certificate describes the home on the day it was assessed, which for the latest certificate of some homes was more than ten years ago.

Flood risk

For England the Environment Agency publishes, for every postcode, how many of its addresses are in areas at high, medium or low risk of flooding, worked out from its National Flood Risk Assessment and its own address list. We add these up over the street's postcodes:

• Rivers, the sea or surface water: each address counted once, at the higher of its rivers-and-sea and surface-water risk. High is a 3.3% (1 in 30) or greater chance of flooding a year, medium 1% to 3.3%, low 0.1% to 1%; addresses at very low risk are not counted.
• Rivers and the sea alone: homes (not other buildings) in each band, very low included, out of the homes the Environment Agency counts in those postcodes. These figures allow for flood defences.
• Groundwater: "possible" when any address in the postcode is in a groundwater flood alert area.

A postcode can include addresses on other streets, so the totals can include homes that are not on this street.

Separately, each postcode's centre point is checked against the flood zones used for planning: flood zone 3 (a 1% or greater chance of river flooding each year, or 0.5% from the sea), flood zone 2 (down to 0.1%), or neither. These ignore defences, and a postcode's centre can be outside a zone that part of it is in. English postcodes are checked against the Environment Agency's Flood Map for Planning, Welsh ones against Natural Resources Wales's, whose zones include an allowance for climate change. For Wales we do not yet show likelihood bands: Natural Resources Wales publishes them as a map (Flood Risk Assessment Wales), not per postcode. None of these cover flooding from sewers or drains.

Council tax

There is no open list of every home's council tax band: the government's band checker answers one address at a time, and each page links to it. What we show instead:

• Homes by band in the neighbourhoods the street's postcodes are in: the Valuation Office Agency's count of homes in each band for every census area of about 700 homes (a lower layer super output area), as at 31 March each year. A street usually spans one to three of them, so the mix describes the area around the street, not the street itself. The counts are rounded to the nearest 10, and small ones are withheld.
• What each band costs: the council's average Band D bill for the year, including the police, fire and any county and parish charges in England, or the police and community council charges in Wales (MHCLG and Welsh Government figures), with every other band worked out from it as the law sets them: A is 6/9 of Band D, B 7/9, C 8/9, E 11/9, F 13/9, G 15/9, H 18/9 and, in Wales only, I 21/9. Parish charges differ within a council, so a real bill can be a little higher or lower, before any discount.

Broadband

Ofcom's Connected Nations figures per postcode: the share of premises that can get superfast (30 Mbit/s), ultrafast (300 Mbit/s) and gigabit broadband, and the share that cannot get 10 Mbit/s. The street shows the range across its postcodes.

Schools

Open schools from Get Information About Schools whose phase is nursery, primary, middle, secondary, all-through or 16 plus (most independent schools have no phase there and are not listed), within 2.0 km of the middle of the street in a straight line, nearest first (up to 12). The inspection outcome is the latest in Ofsted's monthly management information. Since November 2025 Ofsted reports a grade for each area of a school instead of one overall grade; a school last inspected before then shows its older overall grade, and the two cannot be compared. Distance says nothing about admission: catchment areas and oversubscription rules are set by each school or council. Welsh schools are inspected by Estyn and are not yet included.

Food hygiene ratings

Food businesses within 500 m of the middle of the street (up to 15, nearest first), with the rating and the date it was given, from the Food Standards Agency's daily extract. Businesses without a location in the extract cannot be placed and are left out.

Crime

Crimes from data.police.uk recorded within 250 m of the middle of the street over the twelve months loaded, by category and by month. The police move every crime to the nearest of about 760,000 anonymous map points before publishing, so a crime counted here may have happened a little way off, and one nearby may be counted elsewhere. Counts are of recorded crimes, not of all crime, and are not adjusted for how many people live in or pass through the area. Greater Manchester Police has published no street-level data since 2019.

What has changed

Each time a source publishes an update, we compare it with what we held before and record what is new, dated by the day we found it:

• Sales: sales added in the Land Registry's monthly update, placed on a street by the same postcode and street-name match as the sales list. Corrections and deletions of older sales are applied but not listed.
• Energy certificates: certificates lodged since the latest one in the previous monthly register, placed on a street through their UPRN, shown with the band and type of home but not the address.
• Food hygiene ratings: businesses newly listed, re-inspected (with the same or a new rating) or no longer listed in the daily extract, shown on streets within 500 m.
• School inspections: open schools with a new inspection date in Ofsted's monthly file, shown on streets within 2.0 km.
• Flood risk: postcodes whose numbers of addresses at high, medium or low risk changed when the Environment Agency updated its figures.

The first update of each source after the feed began only sets the starting point, so nothing older is listed. Changes are kept for 25 months.

Areas and districts

Each local authority and postcode district has a page listing its named streets. A street is listed in every postcode district it has addresses in, so a district's streets may also belong to a neighbouring authority. The median sale on these pages is over standard sales in the twelve months to the latest sale loaded, by the postcode district of each sale.

Pages search engines are asked to skip

Streets with fewer than 5 addresses, and roads without a name in the open data, have pages here but are marked not to be indexed by search engines and are left out of the sitemaps: there is too little on them to be useful as a search result.

Corrections

We do not edit the published figures. If something here looks wrong, it is most likely wrong in the source, or in how we have matched it; tell us at hello@streetdossier.com and we will check the match and, where the source is at fault, tell you who publishes it.