Common View Letchworth, North Hertfordshire
190 addresses across 10 postcodes (SG6), about 870 m (0.5 miles) long, classed as a local road. USRN 27904308.
- Sales: 142 recorded sales since 1995; in 2026 the median was £470,000 across 1 sale.
- Energy: 104 homes have an energy certificate (B: 2, C: 18, D: 63, E: 19, F: 2).
- Flood: 35 addresses on its postcodes are in areas 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 C; Band D in North Hertfordshire costs £2,449 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Letchworth Garden City, about 1.1 km (0.7 miles) away in a straight line.
- Green space: There is a small park or garden about 280 m away, and Norton Common (29 hectares) is about 370 m away.
- Air: Background air pollution in 2024 was 8.6 µg/m³ of nitrogen dioxide and 7.2 of PM2.5, within UK legal limits.
- Height: Its addresses are 76 to 84 m above sea level.
- Noise: 2 of its 190 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is The Birchwood And Sollershott Surgeries, about 700 m (0.4 miles) away, with 3 practices within 1.6 km (1 mile).
- People: About 960 people lived in the census areas around it in 2021; 57% of households owned their home and 36% of adults held a degree or other higher qualification.
- Crime: 95 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2026 | 1 | £470,000 | £470,000 | £470,000 |
| 2025 | 4 | £360,000 | £323,500 | £400,000 |
| 2024 | 5 | £295,000 | £250,150 | £540,000 |
| 2023 | 5 | £420,000 | £242,500 | £519,000 |
| 2022 | 5 | £363,000 | £280,000 | £482,000 |
| 2021 | 2 | £460,000 | £335,000 | £585,000 |
| 2020 | 1 | £286,000 | £286,000 | £286,000 |
| 2018 | 1 | £325,000 | £325,000 | £325,000 |
| 2017 | 7 | £285,000 | £200,000 | £370,000 |
| 2016 | 5 | £293,000 | £160,000 | £330,000 |
| 2015 | 9 | £235,000 | £144,000 | £334,315 |
| 2014 | 4 | £210,000 | £199,000 | £212,700 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 26 Jun 2026 | 24 SG6 1DA | Semi-detached | £470,000 | |
| 28 Apr 2026 | 1, DAISY COURT SG6 1BZ | Terraced | £230,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 12 Dec 2025 | 84 SG6 1DD | Terraced | £400,000 | |
| 2 Jun 2025 | 120 SG6 1DQ | Terraced | £380,000 | Leasehold. |
| 17 Feb 2025 | 163 SG6 1DG | Terraced | £340,000 | |
| 30 Jan 2025 | 148 SG6 1DQ | Terraced | £323,500 | |
| 13 Dec 2024 | 15 SG6 1BZ | Terraced | £295,000 | |
| 24 Jul 2024 | 33 SG6 1BZ | Semi-detached | £270,000 | |
| 29 May 2024 | 68 SG6 1DA | Other | £540,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 9 May 2024 | 3, DAISY COURT SG6 1BZ | Terraced | £250,150 | |
| 12 Mar 2024 | 53 SG6 1BZ | Terraced | £430,000 | |
| 7 Mar 2024 | 35 SG6 1BZ | Detached | £540,000 | |
| 1 Dec 2023 | 57 SG6 1BZ | Terraced | £420,000 | |
| 23 Nov 2023 | 62 SG6 1DA | Terraced | £300,000 | |
| 27 Jul 2023 | 4, DAISY COURT SG6 1BZ | Terraced | £242,500 | |
| 3 May 2023 | 8 SG6 1DA | Semi-detached | £519,000 | |
| 6 Jan 2023 | 59 SG6 1BZ | Terraced | £425,000 | |
| 16 Dec 2022 | 25 SG6 1BZ | Terraced | £482,000 | |
| 7 Dec 2022 | 151 SG6 1DG | Terraced | £363,000 | |
| 27 May 2022 | 9 SG6 1BZ | Terraced | £280,000 | |
| 11 May 2022 | 33A SG6 1BZ | Semi-detached | £315,000 | |
| 11 Apr 2022 | 34 SG6 1DA | Terraced | £248,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 11 Feb 2022 | 10 SG6 1DA | Semi-detached | £415,000 | |
| 17 Dec 2021 | 120 SG6 1DQ | Terraced | £335,000 | Leasehold. |
| 14 Apr 2021 | 43 SG6 1BZ | Semi-detached | £585,000 | |
| 7 Sep 2020 | 140 SG6 1DQ | Terraced | £286,000 | |
| 24 Sep 2018 | 103 SG6 1DE | Terraced | £325,000 | |
| 15 Nov 2017 | 100A SG6 1DQ | Other | £30,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 15 Nov 2017 | 100A SG6 1DQ | Other | £20,400 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 13 Nov 2017 | 85 SG6 1DD | Terraced | £285,000 | Leasehold. |
| 13 Nov 2017 | 85 SG6 1DD | Other | £285,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 12 Oct 2017 | 42 SG6 1DA | Terraced | £301,125 | |
| 29 Sep 2017 | 89 SG6 1DD | Terraced | £282,500 | Leasehold. |
| 8 Aug 2017 | 21 SG6 1BZ | Terraced | £325,000 | |
| 3 Aug 2017 | 22 SG6 1DA | Semi-detached | £370,000 | |
| 25 May 2017 | 140 SG6 1DQ | Terraced | £268,800 | |
| 16 Jan 2017 | 2, DAISY COURT SG6 1BZ | Terraced | £200,000 | |
| 9 Dec 2016 | 59 SG6 1BZ | Terraced | £300,000 | |
| 23 Nov 2016 | 53 SG6 1BZ | Terraced | £330,000 | Leasehold. |
| 28 Sep 2016 | 120 SG6 1DQ | Terraced | £293,000 | Leasehold. |
| 28 Sep 2016 | 120 SG6 1DQ | Other | £293,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 28 Sep 2016 | 120 SG6 1DQ | Other | £293,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 27 Jul 2016 | 84 SG6 1DD | Other | £4,697 | Not a standard sale (repossession, buy-to-let or transfer). |
| 11 Mar 2016 | 97 SG6 1DD | Terraced | £215,000 | |
| 4 Mar 2016 | 1, DAISY COURT SG6 1BZ | Terraced | £160,000 | |
| 6 Nov 2015 | 42 SG6 1DA | Terraced | £235,000 | |
| 29 Oct 2015 | 163 SG6 1DG | Terraced | £278,995 | |
| 9 Oct 2015 | 120 SG6 1DQ | Terraced | £260,000 | Leasehold. |
| 26 Jun 2015 | 151 SG6 1DG | Terraced | £222,000 | Leasehold. |
| 30 Apr 2015 | 21 SG6 1BZ | Terraced | £230,000 |
Energy performance certificates
104 homes with a current certificate; median floor area 74 m². Most common: House, mid-terrace (46); House, end-terrace (33); House, semi-detached (10). Built: 1900-1929 (77); 1930-1949 (15); 1996-2002 (5). Tenure at assessment: owner-occupied (52); rented (social) (18); rented (private) (12).
Council tax
What each band costs in North Hertfordshire in 2026-27: Band D £2,449 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,632 | £1,904 | £2,176 | £2,449 | £2,993 | £3,537 | £4,081 | £4,897 |
Homes by band in the neighbourhoods around this street: most are in band C (38% of about 1,420 homes).
Planning and heritage
- Conservation area: yes, Letchworth (council page). Extensions, demolition, some windows and doors, and work on trees need consent.
- Listed buildings on or by this street: 2.
- 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.
Listed buildings
- Church of St George with garden walls, steps and three concrete benches, grade II
- ELMWOOD COTTAGES, grade II
Brownfield land registered for housing within 1 km (0.6 miles)
- Foundation House, Icknield Way, Letchworth: up to 57 homes, permissioned (250 m)
- Glebe Road industrial estate, Letchworth: up to 10 homes, not permissioned (260 m)
- Former Depot, Icknield Way, Letchworth: up to 57 homes, not permissioned (570 m (0.4 miles))
- Land at Birds Hill, Letchworth: up to 86 homes, not permissioned (580 m (0.4 miles))
- Pixmore Centre, Pixmore Avenue, Letchworth: up to 31 homes, not permissioned (660 m (0.4 miles))
- Site at Birds Hill, Letchworth: up to 48 homes, not permissioned (660 m (0.4 miles))
- 20-22 Station Road, Letchworth Garden City: up to 25 homes, permissioned (930 m (0.6 miles))
Roadworks
Planned, as of 30 September 2026
- 5 October 2026 to 7 October 2026: AFFINITY WATER - C, Utility repair and maintenance works, some carriageway incursion, on the footway (minor works)
Finished in the last three months
- 17 September 2026 to 18 September 2026: AFFINITY WATER - C, Utility repair and maintenance works, some carriageway incursion, on the footway (minor works)
- 11 September 2026: AFFINITY WATER - C, Utility repair and maintenance works, some carriageway incursion, on the footway (minor works)
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 26 addresses are in areas at high risk, 9 at medium risk and 25 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.
| Postcode | Planning zone | Addresses at high / medium / low risk | Groundwater |
|---|---|---|---|
| SG6 1BZ | not in 2 or 3 | 1 / 0 / 3 | unlikely |
| SG6 1DA | not in 2 or 3 | 6 / 1 / 5 | unlikely |
| SG6 1DQ | not in 2 or 3 | 9 / 1 / 1 | unlikely |
| SG6 1DD | not in 2 or 3 | 6 / 2 / 3 | unlikely |
| SG6 1DG | not in 2 or 3 | 0 / 0 / 4 | unlikely |
| SG6 1DF | not in 2 or 3 | 0 / 2 / 0 | unlikely |
| SG6 1DE | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| SG6 1BY | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| SG6 1BX | not in 2 or 3 | 1 / 1 / 1 | unlikely |
| SG6 1DJ | not in 2 or 3 | 3 / 2 / 8 | unlikely |
Height above sea level
The street's 190 addresses are between 76 m and 84 m above sea level (81 m on average); the ground rises about 9 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| SG6 1BX | 100% | 100% | 100% | 0% |
| SG6 1BY | 100% | 100% | 100% | 0% |
| SG6 1BZ | 100% | 100% | 100% | 0% |
| SG6 1DA | 100% | 100% | 100% | 0% |
| SG6 1DD | 100% | 100% | 100% | 0% |
| SG6 1DE | 100% | 100% | 100% | 0% |
| SG6 1DF | 100% | 100% | 100% | 0% |
| SG6 1DG | 100% | 100% | 100% | 0% |
| SG6 1DJ | 100% | 100% | 100% | 0% |
| SG6 1DQ | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Letchworth Garden City 1.8 million journeys in 2024–25 | 1.1 km (0.7 miles) |
| Baldock 569,000 journeys in 2024–25 | 2.2 km (1.4 miles) | |
| Hitchin 2.9 million journeys in 2024–25 | 4.9 km (3 miles) | |
| Bus stops | 13 stops within 400 m (0.2 miles), 38 within 800 m (0.5 miles); nearest Cashio Lane Letchworth | 200 m |
| Bus or coach station | Bus Station Stevenage | 9.6 km (6 miles) |
| Car parks | Letchworth Town Hall Car Park | 1.3 km (0.8 miles) |
| EV charging points | 5 within 1.6 km (1 mile); nearest ElectrAssure Ltd. | 900 m (0.6 miles) |
| Airport with scheduled flights | London Luton Airport LTN | 16.2 km (10 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 3 practices within 1.6 km (1 mile); nearest The Birchwood And Sollershott Surgeries | 700 m (0.4 miles) |
| Pharmacies | 7 pharmacies within 1.6 km (1 mile); nearest Birch Pharmacy | 620 m (0.4 miles) |
| NHS dentists | 4 practices within 1.6 km (1 mile); nearest Norton Way South (Dental Surgery) | 940 m (0.6 miles) |
| Hospital | The Lister Hospital | 7.1 km (4.4 miles) |
| Police station | Letchworth Police Station | 1.1 km (0.7 miles) |
| Cash machines | 1 machines within 800 m (0.5 miles); nearest Nisa Local - Grange Convenience Store, South Fields Cashzone | 670 m (0.4 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 4 within 800 m (0.5 miles); nearest Unnamed 3.5 ha | 280 m |
| Largest park within 800 m (0.5 miles) | Norton Common 29 ha | 370 m |
| Play area | 6 within 800 m (0.5 miles); nearest Unnamed 320 m² | 510 m (0.3 miles) |
| Playing field | 2 within 800 m (0.5 miles); nearest Unnamed 1.7 ha | 260 m |
| Allotments | Unnamed 960 m² | 860 m (0.5 miles) |
Within 800 m (0.5 miles): 4 parks and gardens, 33 hectares in all.
Landmarks
The nearest historic landmark is 158, Wilbury Road, a listed building (Grade II*), 530 m (0.3 miles) west. 36 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| 158, Wilbury Road | Listed building, Grade II* | 530 m (0.3 miles) west |
| Howard Park and Gardens, Letchworth | Registered park or garden, Grade II | 1.1 km (0.7 miles) south |
| Broadway, Letchworth | Registered park or garden, Grade II | 1.7 km (1 mile) south-west |
| Barrow, south of Radwell | Scheduled monument | 1.9 km (1.2 miles) north-east |
| Settlement site S of Blackhorse Farm | Scheduled monument | 2 km (1.2 miles) north-east |
| Name | What it is | From the middle of the street |
|---|---|---|
| Norton Common | Wood | 650 m (0.4 miles) south-west |
| Norton Pond | Lake or reservoir | 720 m (0.4 miles) north-east |
| Western Lake | Lake or reservoir | 1 km (0.6 miles) south-east |
| Jackman's Plantation | Wood | 1.6 km (1 mile) south-east |
| Wilbury Hill | Hill | 2.5 km (1.5 miles) south-west |
| Blue Lagoon | Lake or reservoir | 2.8 km (1.7 miles) west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 8.6 | 40 | 10 |
| Fine particles (PM2.5) | 7.2 | 20 | 5 |
| Particles (PM10) | 11.6 | 40 | 15 |
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
| Level | Road traffic | Railways |
|---|---|---|
| 60 to 64 | 2 | 0 |
| Under 55 | 188 | 190 |
2 of the street's 190 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 North Hertfordshire: see them on the North Hertfordshire page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Northfields Infants and Nursery School | Primary | 3–7 | 870 m (0.5 miles) | Requires improvement (Apr 2024, overall grade under the previous framework) |
| The Grange Academy | Primary | 7–11 | 940 m (0.6 miles) | Report card (Jun 2026): Curriculum and teaching: Needs attention; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Needs attention; Leadership and governance: Expected standard; Safeguarding standards: Met |
| Hillshott Infant School and Nursery | Primary | 3–7 | 1 km (0.6 miles) | No overall grade (Jan 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Norton St Nicholas CofE (VA) Primary School Church of England | Primary | 3–11 | 1 km (0.6 miles) | No published inspection |
| Stonehill School | Primary | 3–11 | 1.4 km (0.9 miles) | No published inspection |
| Pixmore Junior School | Primary | 7–11 | 1.5 km (0.9 miles) | No overall grade (Mar 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Wilbury Junior School | Primary | 7–11 | 1.6 km (1 mile) | Good (Jun 2024, overall grade under the previous framework) |
| Garden City Academy | Primary | 2–11 | 1.8 km (1.1 miles) | No published inspection |
| Icknield Infant and Nursery School | Primary | 3–7 | 1.8 km (1.1 miles) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Requires improvement; Behaviour and attitudes: Requires improvement; Personal development: Good; Leadership and management: Requires improvement |
| St Mary's Infants' School Church of England | Primary | 4–7 | 1.9 km (1.2 miles) | Good (Jun 2023, overall grade under the previous framework) |
| St Mary's Junior Mixed School Church of England | Primary | 7–11 | 1.9 km (1.2 miles) | Good (Jul 2022, overall grade under the previous framework) |
| The Knights Templar School | Secondary | 11–18 | 1.9 km (1.2 miles) | No published inspection |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| St Georges Church SG6 1DA | Restaurant/Cafe/Canteen | 50 m | 5 Very good | 25 Sep 2024 |
| Lek's Thai & Asain Food SG6 1DT | Retailers - other | 310 m | Exempt | |
| Asda Express PFS Icknield Way SG6 1BS | Retailers - other | 390 m | 5 Very good | 24 Jun 2026 |
| Sri Guru Singh Sabha Sikh Temple SG6 1EF | Restaurant/Cafe/Canteen | 400 m (0.2 miles) | 5 Very good | 3 Mar 2025 |
| Kings Cod Kebab and Burger SG6 4NB | Takeaway/sandwich shop | 430 m (0.3 miles) | 4 Good | 25 Aug 2026 |
| Triangle Stores SG6 1DQ | Retailers - other | 480 m (0.3 miles) | 5 Very good | 29 Jun 2026 |
| Kings Diner SG6 4NB | Restaurant/Cafe/Canteen | 490 m (0.3 miles) | 5 Very good | 13 Aug 2026 |
| Letchworth Lido EA Cafe SG6 4UF | Restaurant/Cafe/Canteen | 500 m (0.3 miles) | 4 Good | 4 Jun 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 50 |
| Anti-social behaviour | 17 |
| Criminal damage and arson | 10 |
| Other theft | 5 |
| Drugs | 5 |
| Public order | 3 |
| Possession of weapons | 2 |
| Burglary | 1 |
| Theft from the person | 1 |
| Other crime | 1 |
Most of these are attached to: On or near Daisy Court (40); On or near Glebe Road (24); On or near Principal Court (10); On or near Common View (9); On or near Cromwell Green (7).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 41 | 40 |
| Children under 15 | 21% | 17% |
| Aged 65 and over | 16% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 57% | 61% |
| Owned outright | 30% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 36% | 17% |
| Private rented | 8% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 59% | 57% |
| Unemployment (of those working or looking for work) | 6% | 6% |
| Retired (of adults) | 20% | 22% |
| Long-term sick or disabled (of adults) | 5% | 4% |
| Work mainly from home (of those in work) | 36% | 32% |
| Travel to work by car or van | 46% | 48% |
| By train, Underground, metro or tram | 6% | 4% |
| By any public transport, including bus | 6% | 8% |
| On foot or by bicycle | 10% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 62% | 65% |
| Work 30 km (19 miles) or more away | 15% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 36% | 34% |
| No qualifications | 14% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 97% | 91% |
| Cannot speak English well or at all | under 1% | 2% |
Deprivation
The 2 neighbourhoods around this street are in deciles 5 to 6 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.
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.
Postcodes on this street
- SG6 1BZ: 50 addresses of 52 in the postcode
- SG6 1DA: 38 addresses of 40 in the postcode
- SG6 1DQ: 34 addresses of 35 in the postcode
- SG6 1DD: 26 addresses of 27 in the postcode
- SG6 1DG: 18 addresses
- SG6 1DF: 11 addresses
- SG6 1DE: 9 addresses
- SG6 1BY: 2 addresses of 22 in the postcode
- SG6 1BX: 1 address of 24 in the postcode
- SG6 1DJ: 1 address of 35 in the postcode
Nearby streets
Daisy Court · Cromwell Green · Principal Court · Glebe Road · Eastholm Green · Gary Grindal Court · Cromwell Road · Haysman Close · Norton Way North · Eastern Way · Furmston Court · Iceni Court
All the streets in SG6 and across North Hertfordshire.
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.