Chipstead Road Banstead

50 addresses across 4 postcodes (SM7), about 510 m (0.3 miles) long, classed as a local road. USRN 31200299.

  • Sales: 49 recorded sales since 1995; in 2023 the median was £735,000 across 1 sale.
  • Energy: 29 homes have an energy certificate (B: 1, C: 19, D: 7, E: 2).
  • Flood: No address on its postcodes is in an area at high or medium risk of flooding from rivers, the sea or surface water.
  • Council tax: Most homes around it are in council tax band D; Band D in Reigate and Banstead costs £2,567 a year in 2026-27.
  • Broadband: Gigabit broadband is available to 100% of premises.
  • Transport: The nearest railway station is Banstead, about 1.7 km (1.1 miles) away in a straight line.
  • Green space: The nearest park or garden, Nork Park, is about 830 m (0.5 miles) away.
  • Air: Background air pollution in 2024 was 9.4 µg/m³ of nitrogen dioxide and 7.4 of PM2.5, within UK legal limits.
  • Height: Its addresses are 153 to 167 m above sea level.
  • Noise: 7 of its 50 addresses are modelled at 55 dB or more from road traffic.
  • Doctors: The nearest GP surgery is Nork Clinic, about 1.4 km (0.9 miles) away.
  • People: About 680 people lived in the census areas around it in 2021; 64% of households owned their home and 36% of adults held a degree or other higher qualification.
  • Crime: 24 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.

Sales on this street

Source: HM Land Registry Price Paid Data, sales registered up to 28 August 2026, loaded 28 October 2026. Sales reach the register two weeks to two months after completion, so the last two months are incomplete. Matched by postcode and street name.

Sales by year (standard sales only; repossessions and buy-to-let transfers excluded)
YearSalesMedian priceLowestHighest
20231£735,000£735,000£735,000
20222£497,500£310,000£685,000
20211£297,500£297,500£297,500
20201£250,000£250,000£250,000
20191£280,000£280,000£280,000
20181£280,000£280,000£280,000
20171£315,000£315,000£315,000
20161£645,000£645,000£645,000
20142£210,000£203,000£217,000
20132£193,750£190,000£197,500
20121£391,000£391,000£391,000
20111£310,000£310,000£310,000
Most recent sales (49)
DateAddressTypePriceNotes
15 Jun 202322 SM7 2HHSemi-detached£735,000
20 Oct 202214 SM7 2HHSemi-detached£685,000
29 Jul 2022FLAT 5, PRIORY COURT SM7 2HJFlat or maisonette£301,000Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
25 May 2022FLAT 27, PRIORY COURT SM7 2HJFlat or maisonette£310,000Leasehold.
29 Jun 20217 SM7 2HJFlat or maisonette£295,000Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
29 Mar 2021FLAT 25, PRIORY COURT SM7 2HJFlat or maisonette£297,500Leasehold.
12 Mar 202122A SM7 2HHDetached£750,000Not a standard sale (repossession, buy-to-let or transfer).
22 Jan 2020FLAT 23, PRIORY COURT SM7 2HJFlat or maisonette£250,000Leasehold.
25 Jan 2019FLAT 25, PRIORY COURT SM7 2HJFlat or maisonette£280,000Leasehold.
4 Jul 2018FLAT 19, PRIORY COURT SM7 2HJFlat or maisonette£280,000Leasehold.
13 Nov 2017FLAT 9, PRIORY COURT SM7 2HJFlat or maisonette£315,000Leasehold.
26 May 201610 SM7 2HHSemi-detached£645,000
31 Mar 2014FLAT 9, PRIORY COURT SM7 2HJFlat or maisonette£203,000Leasehold.
10 Jan 2014FLAT 19, PRIORY COURT SM7 2HJFlat or maisonette£217,000Leasehold.
20 Sep 2013FLAT 7, PRIORY COURT SM7 2HJFlat or maisonette£190,000Leasehold.
12 Sep 2013FLAT 17, PRIORY COURT SM7 2HJFlat or maisonette£197,500Leasehold.
4 Sep 201224 SM7 2HHSemi-detached£391,000
15 Jun 201129 SM7 2HJDetached£310,000
7 Dec 200916 SM7 2HHTerraced£399,950
26 Aug 200918 SM7 2HHSemi-detached£385,000
29 Aug 200819 SM7 2HJFlat or maisonette£167,500Leasehold.
12 Oct 200721 SM7 2HJFlat or maisonette£200,000Leasehold.
17 Aug 200725 SM7 2HJFlat or maisonette£224,000Leasehold.
12 Jul 200727 SM7 2HJFlat or maisonette£194,000Leasehold.
31 Mar 200615 SM7 2HJFlat or maisonette£175,000Leasehold.
29 Apr 20042 SM7 2HHSemi-detached£245,000
5 Mar 200416 SM7 2HHTerraced£80,000
23 Dec 200310A SM7 2HHSemi-detached£349,950
24 Oct 200310 SM7 2HHSemi-detached£344,000
3 Sep 200327 SM7 2HJFlat or maisonette£145,000Leasehold.
16 May 20032 SM7 2HHSemi-detached£200,000
28 Oct 200218 SM7 2HHSemi-detached£269,950
28 Jun 20026 SM7 2HHDetached£249,999
22 Nov 200125 SM7 2HJFlat or maisonette£118,000Leasehold.
9 Nov 20015 SM7 2HJFlat or maisonette£116,000Leasehold.
7 Jun 200017 SM7 2HJFlat or maisonette£101,000Leasehold.
17 Dec 199924 SM7 2HHSemi-detached£215,000
15 Sep 19995 SM7 2HJFlat or maisonette£85,000Leasehold.
12 Jul 199928 SM7 2HHSemi-detached£161,000
28 May 199927 SM7 2HJFlat or maisonette£83,000Leasehold.
29 May 199824 SM7 2HHSemi-detached£162,000
6 Aug 199727 SM7 2HJFlat or maisonette£67,000Leasehold.
6 Mar 199726 SM7 2HHSemi-detached£142,500
28 Feb 19975 SM7 2HJFlat or maisonette£57,000Leasehold.
30 Sep 19963 SM7 2HJFlat or maisonette£55,000Leasehold.
17 Jun 199612 SM7 2HHSemi-detached£170,000
13 Nov 199517 SM7 2HJFlat or maisonette£58,000Leasehold.
10 Aug 199510A SM7 2HHSemi-detached£137,850New build.
31 Mar 199510 SM7 2HHSemi-detached£139,950New build.

Energy performance certificates

Source: Energy Performance of Buildings Register (MHCLG), register as at 1 November 2026. Latest certificate per address; certificates last ten years, so the oldest here dates from April 2009 and some homes have none. Address data © Ordnance Survey and Royal Mail, shown for understanding the energy efficiency of buildings only.

29 homes with a current certificate; median floor area 65 m². Most common: Flat (10); House, semi-detached (7); Maisonette, semi-detached (7). Built: 1967-1975 (7); 2007-2011 (6); 1900-1929 (3). Tenure at assessment: owner-occupied (13); rented (private) (7); rented (social) (1).

Council tax

What each band costs in Reigate and Banstead in 2026-27: Band D £2,567 a year on average, including the police, fire and any county and parish charges.

ABCDEFGH
£1,711£1,996£2,281£2,567£3,137£3,707£4,278£5,133

Homes by band in the neighbourhood around this street: most are in band D (42% of about 590 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10), for the neighbourhood (census area of about 700 homes) around it, not just this street; Ministry of Housing, Communities and Local Government, council tax levels 2026-27. Bands are charged as fixed shares of Band D; the actual bill depends on the parish and on discounts such as the single-person discount. Check a home's own band with the official council tax band checker.

Planning and heritage

  • Conservation area: no postcode centre in this street's postcodes is in one.
  • Listed buildings on or by this street: none.
  • Article 4 direction (removing permitted development rights): none recorded, though not every council has published theirs.
  • Tree preservation orders: none recorded, though not every council has published theirs.
  • Green belt: no.

Brownfield land registered for housing within 1 km (0.6 miles)

Source: planning.data.gov.uk (Ministry of Housing, Communities and Local Government), compiled from councils and, for listed buildings, Historic England's National Heritage List. Conservation areas, Article 4 directions, tree preservation areas and the green belt are checked at each postcode's centre. Listed buildings and protected trees are counted on or by this street. Councils publish Article 4 directions, tree preservation orders and brownfield registers to different standards, and some not yet. Planning applications are not here: there is no national open record of them yet.

Roadworks

Planned, as of 30 September 2026

  • 2 November 2026 to 20 November 2026: ESP ELECTRICITY, Utility asset works, multi-way signals, on the footway, carriageway, verge (major works, permit applied for)
  • 9 November 2026 to 13 November 2026: SES WATER (Formerly SUTTON & EAST SURREY WATER COMPANY), New service connection, road closure, on the carriageway, verge (major (paa) works)
  • 9 November 2026 to 13 November 2026: SES WATER (Formerly SUTTON & EAST SURREY WATER COMPANY), New service connection, road closure, on the carriageway, verge (major works)

Source: Department for Transport, Street Manager open data, permits and works up to 30 September 2026. It is published once a month, so works arranged or started since then are not shown, and dates are the ones planned unless the works have started or finished. Emergency works are often permitted after they begin.

Flood risk

Rivers, the sea or surface water: in this street's postcodes, 0 addresses are in areas at high risk, 0 at medium risk and 2 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.

Rivers and the sea alone: no home is in an area at risk.

High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. Very low: under 0.1%. The rivers and sea figures allow for flood defences. Counts cover whole postcodes, which can include other streets.

Flood zone for planning: no postcode centre on this street is in flood zone 2 or 3.

PostcodePlanning zoneAddresses at high / medium / low riskGroundwater
SM7 2HHnot in 2 or 3 0 / 0 / 2 unlikely
SM7 2HJnot in 2 or 3 0 / 0 / 0 unlikely
SM7 2HNnot in 2 or 3 0 / 0 / 0 unlikely
SM7 2HAnot in 2 or 3 0 / 0 / 0 unlikely

Sources: Environment Agency Flood risk: postcode search tool data (loaded 29 October 2026), Risk of Flooding from Rivers and Sea: postcodes in areas at risk (loaded 29 October 2026) and Flood Map for Planning (loaded 28 October 2026). Flood zones are checked at each postcode's centre point. These are models of areas, which their publishers say are not suitable for showing whether an individual property is at risk, and they do not cover flooding from sewers or drains. Check an address on the official long-term flood risk service.

© Environment Agency copyright and/or database right 2026. All rights reserved. Some features are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH); the postcode data is produced in part from PAF® and Multiple Residence Data, © Royal Mail Group Limited.

Height above sea level

The street's 50 addresses are between 153 m and 167 m above sea level (163 m on average); the ground rises about 14 m from the lowest to the highest.

Source: Ordnance Survey, OS Terrain 50, July 2026: the height of the ground on a 50 m grid, read at each address, in metres above Ordnance Datum (mean sea level at Newlyn). It is the lie of the land, not floor or threshold levels, and is accurate to a few metres. Being low-lying is not in itself a flood risk; the flood section above says what the flood maps show.

Broadband

Source: Ofcom Connected Nations, data as at January 2026. Percentages are of premises in each postcode that can get the service, not take-up or speed achieved.

Availability by postcode (% of premises)
PostcodeSuperfast (30 Mbit/s+)Ultrafast (300 Mbit/s+)GigabitBelow 10 Mbit/s
SM7 2HA100%100%100%0%
SM7 2HH100%100%100%0%
SM7 2HJ100%100%100%0%
SM7 2HN100%100%100%0%

Getting around

Sources: Department for Transport, NaPTAN (every public transport stop), as at 31 October 2026; Office of Rail and Road, Estimates of station usage 2024–25 (which stations are on the National Rail network, and their journeys: entries and exits in the year to March); OurAirports (public domain, kept by volunteers); car parks and charging points from Overture Maps Foundation, release 2026-10-21.0, which gathers business listings from Meta, Microsoft, Foursquare and others: not an official register, so some will be missing, private or out of date. Distances are straight lines from the middle of the street, not routes, and say nothing about how often anything runs. Stations opened since the end of ORR's year appear when ORR publishes the next one, each December; heritage railways are left out.

NearestDistance
Railway stationsBanstead 149,000 journeys in 2024–251.7 km (1.1 miles)
Kingswood 150,000 journeys in 2024–252.2 km (1.4 miles)
Epsom Downs 126,000 journeys in 2024–252.4 km (1.5 miles)
Bus stops8 stops within 400 m (0.2 miles), 15 within 800 m (0.5 miles); nearest Stirling Close Banstead70 m
Bus or coach stationBanstead - Fir Tree Road1.5 km (0.9 miles)
Ferry terminalDitton Island Ferry Landing Thames Ditton12.3 km (7.6 miles)
Car parksBanstead High Street Car Park930 m (0.6 miles)
EV charging points14 within 1.6 km (1 mile); nearest 31 Thornfield Road190 m
Airport with scheduled flightsLondon Gatwick Airport LGW18.5 km (11 miles)

Local services

Sources: NHS Organisation Data Service, as at 31 October 2026: GP practices, community pharmacies and dental practices with an NHS contract, open now, each placed at the centre of its postcode; hospitals are NHS trust and Welsh health board sites named as hospitals, and may not have an emergency department. Police stations and cash machines from Overture Maps Foundation, release 2026-10-21.0, which gathers business listings: not an official register, so some will be missing or out of date. Distances are straight lines from the middle of the street. Nothing here says whether a practice is taking new patients or a dentist new NHS patients.

NearestDistance
GP surgeries1 practices within 1.6 km (1 mile); nearest Nork Clinic1.4 km (0.9 miles)
Pharmacies5 pharmacies within 1.6 km (1 mile); nearest Pearl Chemist910 m (0.6 miles)
NHS dentists5 practices within 1.6 km (1 mile); nearest Dental Surgery360 m
HospitalThe Royal Marsden Hospital3.4 km (2.1 miles)
Police stationEpsom Police Station4.5 km (2.8 miles)
Cash machinesHalifax ATM930 m (0.6 miles)

Parks and green space

Source: Ordnance Survey, OS Open Greenspace, April 2026: public parks and gardens, play spaces, playing fields and allotments, with their entrances. Distances are straight lines from the middle of the street to a site's nearest entrance (or its edge where none is recorded), not walking routes; sizes are the area OS maps for each site. Some sites, such as school playing fields, may not be open to the public.

NearestDistance
Park or gardenNork Park 42 ha830 m (0.5 miles)
Play areaUnnamed 580 m²900 m (0.6 miles)
Playing field2 within 800 m (0.5 miles); nearest Gartons Recreation Ground 2.6 ha490 m (0.3 miles)
Allotments1 within 800 m (0.5 miles); nearest Unnamed 1.5 ha600 m (0.4 miles)

Landmarks

The nearest historic landmark is Bowl barrow and later beacon at Tumble Beacon, a scheduled monument, 730 m (0.5 miles) west. 6 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.

Historic places
NameWhat it isFrom the middle of the street
Bowl barrow and later beacon at Tumble BeaconScheduled monument730 m (0.5 miles) west
Church of All SaintsListed building, Grade II*1 km (0.6 miles) north-east
Two Saxon burial mounds on Gally Hills, west of Brighton RoadScheduled monument2 km (1.2 miles) north
Natural landmarks within 5 km (3.1 miles)
NameWhat it isFrom the middle of the street
Lambert's ShawWood640 m (0.4 miles) south
Ruffett WoodWood660 m (0.4 miles) south-east
Canons WoodWood720 m (0.4 miles) south-west
Rose HillHill1.1 km (0.7 miles) north-east
Lonesome PondsLake or reservoir1.5 km (0.9 miles) south-west
Chipstead BottomValley2.3 km (1.4 miles) south-east

Sources: Historic England's registers through planning.data.gov.uk (MHCLG), and Cadw through DataMapWales (Welsh Government): World Heritage Sites within 10 km (6.2 miles), battlefields within 5 km (3.1 miles), registered parks and gardens within 3 km (1.9 miles), scheduled monuments within 2 km (1.2 miles), and Grade I and II* listed buildings within 1 km (0.6 miles). Ordnance Survey, OS Open Names, October 2026: named hills, valleys, lakes, woods, wetlands and coast (it has no rivers). Distances are in a straight line to the middle of each site, and being on a register does not mean there is public access.

Air quality

Source: Defra, modelled background air pollution, annual means for 2024, for the 1 km square that holds the middle of the street. These are background levels, away from the kerb: beside a busy road nitrogen dioxide in particular can be several times higher. UK limits are the legal annual limits for England and Wales; the World Health Organization's 2021 guidelines are much stricter, and most towns and cities are above them.

Annual means in µg/m³ (micrograms per cubic metre of air)
PollutantHereUK limitWHO guideline
Nitrogen dioxide (NO2)9.44010
Fine particles (PM2.5)7.4205
Particles (PM10)11.84015

All three are within the UK legal limits; PM2.5 is above the WHO guideline, as in most towns and cities.

Road and rail noise

Source: Defra, strategic noise mapping Round 4 (England), modelled for 2021 and published in December 2023, and its airport maps of the same round for the fifteen largest English airports, published in April 2026: Lden, the average sound level over a whole day with extra weight for the evening and night, on a 10 m grid, read at each address. These are models of traffic, not measurements; they leave out smaller airports and airfields, industry and neighbours, and a room at the back of a house is often much quieter than the front. The World Health Organization's guidelines are 53 dB for road traffic, 54 dB for railways and 45 dB for aircraft (below the lowest level shown here).

Addresses by modelled noise level (Lden, dB)
LevelRoad trafficRailways
70 to 7410
60 to 6410
55 to 5950
Under 554350

7 of the street's 50 addresses are modelled at 55 dB or more from road traffic, above the WHO guidelines.

Climate, daylight and earthquakes

Monthly temperatures and rainfall, sunrise and sunset through the year, and earthquakes recorded nearby since 1970 are much the same across the area, so they are worked out once for Reigate and Banstead: see them on the Reigate and Banstead page.

Nearest schools

Source: Get Information About Schools (Department for Education), 1 November 2026; Ofsted monthly management information as at September 2026. Distances are straight lines from the middle of the street to the school; catchments and admissions are not shown. Since November 2025 Ofsted gives report-card grades by area, not one overall grade; older grades stand until a school is re-inspected.

SchoolPhaseAgesDistanceInspection
The Beacon SchoolSecondary11–16530 m (0.3 miles) Report card (Jun 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Needs attention; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Safeguarding standards: Met
St Anne's Catholic Primary School Roman CatholicPrimary4–11720 m (0.4 miles) No published inspection
Banstead Infant School and NurseryPrimary2–7850 m (0.5 miles) No published inspection
Banstead Community Junior SchoolPrimary7–11860 m (0.5 miles) Good (Jun 2023, overall grade under the previous framework)
Warren Mead Infant SchoolPrimary2–71.7 km (1.1 miles) No published inspection
Shawley Community Primary Academy & NurseryPrimary0–111.8 km (1.1 miles) Good (Jul 2024, overall grade under the previous framework)
Warren Mead Junior SchoolPrimary7–111.8 km (1.1 miles) No published inspection

Food hygiene ratings nearby

Source: Food Standards Agency, Food Hygiene Rating Scheme, extract of 1 November 2026. Each rating is shown with the date it was given; a business may have been re-inspected since the extract. Within 500 m (0.3 miles) of the middle of the street.

BusinessTypeDistanceRatingRated
Highfield SF Connect (M And S Franchise) SM7 1AZRetailers - other400 m (0.2 miles)5 Very good1 Jul 2025
Burgh Wood Montessori Nursery School SM7 1BTHospitals/Childcare/Caring Premises440 m (0.3 miles)5 Very good5 Sep 2025
Bright Horizons Banstead Day Nursery And Preschool SM7 1DFHospitals/Childcare/Caring Premises480 m (0.3 miles)5 Very good18 Mar 2026

Crime within 250 m

Source: data.police.uk street-level crime, September 2025 to August 2026. Police forces move every crime to the nearest of about 760,000 anonymised map points before publishing, so these are crimes near this street, not on it, and a busy point can collect crimes from a wider area. Counts are of records, not convictions.

24 recorded crimes by category
CategoryCrimes
Violence and sexual offences7
Other crime4
Vehicle crime3
Burglary3
Public order2
Criminal damage and arson2
Other theft1
Robbery1
Anti-social behaviour1

Most of these are attached to: On or near Horsecroft (7); On or near Pound Road (5); On or near Gale Crescent (4); On or near The Fieldings (3); On or near Wellesford Close (2).

People and work

Source: ONS Census 2021, taken on 21 March 2021, for the 2 Output Areas (small census areas of about 125 households each) that this street's postcodes are in: 684 residents in 306 households. The census was taken during a lockdown, so working from home is high and travel to work low compared with now. ONS swaps a few records between neighbouring areas and adds small amounts of noise to counts to protect privacy, so small differences mean little. Industry is not published for areas this small.

Who lives here

Around this streetEngland
Median age4040
Children under 1520%17%
Aged 65 and over15%18%

Homes

Around this streetEngland
Owned (outright or with a mortgage)64%61%
Owned outright28%33%
Shared ownership1%1%
Social rented20%17%
Private rented15%21%

Work and commuting

Around this streetEngland
Adults (16 and over) in work64%57%
Unemployment (of those working or looking for work)4%6%
Retired (of adults)20%22%
Long-term sick or disabled (of adults)3%4%
Work mainly from home (of those in work)33%32%
Travel to work by car or van54%48%
By train, Underground, metro or tram2%4%
By any public transport, including bus4%8%
On foot or by bicycle6%10%
Work within 10 km (6 miles) of home (of those who travel to work)69%65%
Work 30 km (19 miles) or more away3%8%

Education and languages

Around this streetEngland
Degree or other higher qualification, Level 4+ (of adults)36%34%
No qualifications14%18%
Apprenticeship as highest qualification5%5%
Main language English (aged 3 and over)96%91%
Cannot speak English well or at allunder 1%2%

Deprivation

The neighbourhood around this street is in decile 7 of 10 on the English Indices of Deprivation 2025, where 1 is the most deprived tenth of England's 33,755 neighbourhoods and 10 the least.

Source: English Indices of Deprivation 2025 (Ministry of Housing, Communities and Local Government), by LSOA (about 1,500 people), through the ONS Postcode Directory. The index combines income, employment, health, education, crime, housing and living environment; it ranks areas against each other and does not describe any one household. Ranks in England and Wales are worked out separately and cannot be compared.

What has changed

Nothing new since the change feed started on 30 October 2026. New sales and energy certificates, and hygiene ratings, school inspections and flood figures nearby, will be listed here as the sources update.

Everything that has changed on and near this street

Postcodes on this street

Source: ONS Postcode Directory August 2026, ONS UPRN Directory September 2026, OS Open Linked Identifiers September 2026. A postcode can cover more than one street; the share shows how many of its addresses are on this one.

  • SM7 2HH: 20 addresses of 22 in the postcode
  • SM7 2HJ: 17 addresses
  • SM7 2HN: 9 addresses of 10 in the postcode
  • SM7 2HA: 4 addresses of 13 in the postcode

Nearby streets

Stirling Close · Pound Road · The Laurels · Wellesford Close · Gale Crescent · Horsecroft · Pound Road · Shrubland Road · The Fieldings · Lyme Regis Road · Chipstead Road · Chalk Pit Road

All the streets in SM7 and across Reigate and Banstead.

What this page cannot tell you

  • Whether a particular house is at risk of flooding, subsiding or anything else: the flood map is a model of areas and there is no property-level data here.
  • What a home is worth now: sales are historic prices for the homes that happened to sell.
  • How safe the street is: crime points are moved to anonymised locations and many crimes are never reported.
  • Whether you would get a place at a school: distances are straight lines, not catchments.
  • Who lives on the street now: census figures describe the small areas around it in March 2021, during a lockdown.
  • How long a journey takes or how often anything runs: transport distances are straight lines to the nearest stops.
  • Whether a GP practice is taking new patients, or a dentist new NHS patients.
  • How loud a home is inside, or noise from industry, neighbours or smaller airfields: noise figures are models of road, rail and air traffic outside.

How each figure on this page is matched to the street and worked out: methodology.