Lovell Close Hitchin, North Hertfordshire
16 addresses across 3 postcodes (SG4), about 80 m long, classed as a local road. USRN 27910630.
- Sales: 8 recorded sales since 1995; in 2024 the median was £847,500 across 2 sales.
- Prices and rents: A typical home in North Hertfordshire cost £422,835 in August 2026 (+3.1% on a year); private rents averaged £1,445 a month.
- Energy: 6 homes have an energy certificate (C: 1, D: 4, E: 1).
- Flood: 9 addresses on its postcodes are in areas at high or medium risk of flooding from rivers, the sea or surface water.
- Recorded floods: No recorded flood covers the centre of any of its postcodes.
- Landfill: 1 historic landfill site within 500 m (0.3 miles) of its postcodes; the nearest, Eynesford Court, is 300 m away.
- Storm overflows: 1 storm overflow within 1 km (0.6 miles) spilled 0 times (0 hours) in 2025.
- Council tax: Most homes around it are in council tax band B; 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 Hitchin, about 930 m (0.6 miles) away in a straight line.
- Green space: The nearest park or garden, Pinehill Park, is about 390 m away.
- Air: Background air pollution in 2024 was 8.6 µg/m³ of nitrogen dioxide and 7.3 of PM2.5, within UK legal limits.
- Height: It is about 94 m above sea level.
- Noise: 2 of its 16 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is The Portmill Surgery, about 620 m (0.4 miles) away, with 4 practices within 1.6 km (1 mile).
- People: About 650 people lived in the census areas around it in 2021; 80% of households owned their home and 57% of adults held a degree or other higher qualification.
- Crime: 22 crimes were recorded within 250 m between September 2025 and August 2026, most often anti-social behaviour.
- Road safety: 3 collisions in which someone was hurt were reported on and around it in 2021 to 2025; 2 involved a pedestrian.
£9.99 The Street Dossier Full Report for a home on Lovell Close: its own records, questions to ask the seller and everything on this page, in one PDF. Choose the home
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2024 | 2 | £847,500 | £820,000 | £875,000 |
| 2021 | 1 | £676,500 | £676,500 | £676,500 |
| 2020 | 1 | £651,283 | £651,283 | £651,283 |
| 2018 | 1 | £721,000 | £721,000 | £721,000 |
| 2015 | 1 | £601,661 | £601,661 | £601,661 |
| 2003 | 1 | £289,995 | £289,995 | £289,995 |
| 1999 | 1 | £175,000 | £175,000 | £175,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 27 Sep 2024 | 6 SG4 9LB | Detached | £820,000 | |
| 5 Apr 2024 | 12 SG4 9LB | Detached | £875,000 | |
| 5 Mar 2021 | 7 SG4 9LB | Detached | £676,500 | |
| 2 Mar 2020 | 4 SG4 9LB | Detached | £651,283 | |
| 20 Jul 2018 | 12 SG4 9LB | Detached | £721,000 | |
| 2 Dec 2015 | 1 SG4 9LB | Detached | £601,661 | |
| 22 Jul 2003 | 9 SG4 9LB | Detached | £289,995 | |
| 6 Jul 1999 | 13 SG4 9LB | Detached | £175,000 |
House prices and rents in North Hertfordshire
A typical home in North Hertfordshire cost £422,835 in August 2026, 3.1% more than a year before. That is 12% more than five years earlier and 23% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £798,369 |
| Semi-detached | £486,365 |
| Terraced | £383,241 |
| Flat or maisonette | £229,978 |
| Bought by a first-time buyer | £343,025 |
Private renters in North Hertfordshire paid £1,445 a month on average in September 2026, 6.4% more than a year before. That is 38% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £1,031 |
| Two bedrooms | £1,293 |
| Three bedrooms | £1,588 |
| Four or more bedrooms | £2,252 |
Energy performance certificates
6 homes with a current certificate; median floor area 124 m². Most common: House, detached (6). Built: 1967-1975 (6). Tenure at assessment: owner-occupied (6).
Each home's certificates and sales (6 addresses)
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 neighbourhood around this street: most are in band B (30% of about 800 homes).
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)
- The Exchange, Queen Street, Hitchin: up to 10 homes, pending decision (540 m (0.3 miles))
- 2 - 8 Bucklersbury Hitchin Hertfordshire SG5 1BB: up to 7 homes, permissioned (810 m (0.5 miles))
- Kwik -Fit Tyres, 59 -61 Walsworth Road, Hitcin: up to 10 homes, permissioned (810 m (0.5 miles))
- Railway Sidings, St. Michael's Road, Hitchin: up to 123 homes, not permissioned (870 m (0.5 miles))
- Block B, Latchmore Court, Hitchin: up to 10 homes, permissioned (900 m (0.6 miles))
- Former B&Q, at junction of Nightingale and Walsworth Road, Hitchin: up to 60 homes, not permissioned (930 m (0.6 miles))
- The Nightingale, Nightingale Road, Hitchin: up to 11 homes, permissioned (940 m (0.6 miles))
- 1a Kings Road Hitchin Hertfordshire SG5 1RD: up to 5 homes, permissioned (1 km (0.6 miles))
Energy projects nearby
1 energy project near the street's postcodes.
| Project | Kind | Size | Stage | Distance |
|---|---|---|---|---|
| Hitchin North Hertfordshire 04/00779/1CM | Landfill Gas | 1.5 MW | Operational Nov 2006 | 4.1 km (2.5 miles) |
Planned projects can change or not go ahead; search the planning authority's applications by the reference shown for the plans, conditions and any objections. Construction brings traffic for some months; once built, solar farms and batteries are usually quiet, while turbines and waste plants can be seen or heard further away.
Roadworks
No street works under way, planned or finished in the last three months on this street, in permits up to 31 October 2026.
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 4 addresses are in areas at high risk, 5 at medium risk and 0 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 |
|---|---|---|---|
| SG4 9LB | not in 2 or 3 | 4 / 5 / 0 | unlikely |
| SG4 9LA | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| SG4 9LD | not in 2 or 3 | 0 / 0 / 0 | unlikely |
Recorded floods
No recorded flood covers the centre of any of this street's postcodes.
Recorded floods are where floodwater was seen or surveyed after a flood. Many floods were never mapped, an outline over a postcode's centre does not mean every home in it flooded, and homes outside one may have. Ask the seller whether the home itself has flooded.
Coastal erosion
No projected coastal erosion zone is within 1 km (0.6 miles) of the street's postcodes.
Storm overflows
1 storm overflow within 1 km (0.6 miles) of the street's postcodes spilled 0 times, for under an hour in all, in 2025. They discharge into River Hiz.
| Overflow | Into | Spills | Hours | Distance |
|---|---|---|---|---|
| Bancroft Recreation Ground Cso Anglian Water | River Hiz | 0 | 0 | 840 m (0.5 miles) |
A storm overflow lets sewage diluted with rainwater into a river, stream or the sea when heavy rain overwhelms the sewers, so the spills here affect the water they run into, not homes. A spill is counted the regulators' way: a first 12 hours, then each 24 hours it goes on.
Coal mining
No postcode centre on the street is in a coalfield: the Mining Remediation Authority records no coal mining risk here.
Historic landfill
1 historic landfill site is within 500 m (0.3 miles) of the street's postcodes, the nearest 300 m away.
| Site | Waste went in | Waste | Distance |
|---|---|---|---|
| Eynesford Court Hitchin, Hertfordshire | Not recorded | Not recorded | 300 m |
Closed tips can give off gas (methane and carbon dioxide) and leak into the ground for years. An environmental search, which conveyancers usually order, looks at landfill and contaminated land around the home; the council keeps a register of land it has found to be contaminated.
Height above sea level
The street's addresses are about 94 m above sea level.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| SG4 9LA | 100% | 100% | 100% | 0% |
| SG4 9LB | 100% | 100% | 100% | 0% |
| SG4 9LD | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Hitchin 2.9 million journeys in 2024–25 | 930 m (0.6 miles) |
| Letchworth Garden City 1.8 million journeys in 2024–25 | 4.7 km (2.9 miles) | |
| Stevenage 4.7 million journeys in 2024–25 | 6.4 km (4 miles) | |
| Bus stops | 5 stops within 400 m (0.2 miles), 27 within 800 m (0.5 miles); nearest Passingham Avenue Hitchin | 70 m |
| Bus or coach station | Bus Station Stevenage | 6.5 km (4 miles) |
| EV charging points | 2 within 1.6 km (1 mile); nearest Lairaige Multi storey Car Park GeniePoint | 1 km (0.6 miles) |
| Airport with scheduled flights | London Luton Airport LTN | 10.5 km (6.5 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 4 practices within 1.6 km (1 mile); nearest The Portmill Surgery Good Mar 2017 | 620 m (0.4 miles) |
| Pharmacies | 5 pharmacies within 1.6 km (1 mile); nearest Nu Cross Dispensing Chemist | 770 m (0.5 miles) |
| NHS dentists | 10 practices within 1.6 km (1 mile); nearest Mr N F Faryad | 440 m (0.3 miles) |
| Hospital | The Lister Hospital Requires improvement Nov 2023 | 4.5 km (2.8 miles) |
| Care homes | 8 homes within 1.6 km (1 mile); nearest Ashwood Place Good Nov 2019 | 440 m (0.3 miles) |
| Police station | Hitchin Police Station | 1.1 km (0.7 miles) |
| Cash machines | 1 machine within 800 m (0.5 miles); nearest ATM | 130 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 1 within 800 m (0.5 miles); nearest Pinehill Park 4.1 ha | 390 m |
| Play area | 2 within 800 m (0.5 miles); nearest Unnamed 690 m² | 470 m (0.3 miles) |
| Playing field | 2 within 800 m (0.5 miles); nearest Unnamed 3.3 ha | 290 m |
| Allotments | Unnamed 4,700 m² | 1 km (0.6 miles) |
Within 800 m (0.5 miles): 1 park or garden, 4.1 hectares in all.
Landmarks
The nearest historic landmark is North Eastern Block of Buildings at the British Schools, a listed building (Grade II*), 510 m (0.3 miles) west. 180 listed buildings are within 1 km (0.6 miles), 2 of them Grade I and 11 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| North Eastern Block of Buildings at the British Schools | Listed building, Grade II* | 510 m (0.3 miles) west |
| Biggin Almshouses | Listed building, Grade II* | 630 m (0.4 miles) west |
| 31 and 32, Bridge Street | Listed building, Grade II* | 710 m (0.4 miles) west |
| Church of Saint Mary | Listed building, Grade I | 720 m (0.4 miles) north-west |
| Roman villa (site of) 330yds (300m) N of Ninesprings | Scheduled monument | 1.6 km (1 mile) east |
| Name | What it is | From the middle of the street |
|---|---|---|
| Windmill Hill | Hill | 390 m north-west |
| Butt's Close Pond | Lake or reservoir | 1.2 km (0.7 miles) north-west |
| Blundell's Copse | Wood | 1.4 km (0.9 miles) south-west |
| The Willows | Wood | 1.5 km (0.9 miles) west |
| The Belt | Wood | 1.7 km (1.1 miles) east |
| Charlton Mill Pond | Lake or reservoir | 1.7 km (1.1 miles) south-west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 8.6 | 40 | 10 |
| Fine particles (PM2.5) | 7.3 | 20 | 5 |
| Particles (PM10) | 12.1 | 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 |
|---|---|---|
| 55 to 59 | 2 | 0 |
| Under 55 | 14 | 16 |
2 of the street's 16 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 |
|---|---|---|---|---|
| Hitchin Girls' School | Secondary | 11–18 | 310 m | No overall grade (Oct 2024, graded inspection without an overall judgement): Quality of education: Outstanding; Behaviour and attitudes: Outstanding; Personal development: Outstanding; Leadership and management: Outstanding |
| Highbury Infant School and Nursery | Primary | 3–7 | 330 m | No published inspection |
| Whitehill Junior School | Primary | 7–11 | 450 m (0.3 miles) | No published inspection |
| St Andrew's Church of England Voluntary Aided Primary School, Hitchin | Primary | 4–11 | 610 m (0.4 miles) | Report card (Jul 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Strong standard; Personal development and wellbeing: Strong standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Early years: Strong standard; Safeguarding standards: Met |
| William Ransom Primary School | Primary | 4–11 | 660 m (0.4 miles) | No overall grade (Mar 2025, graded inspection without an overall judgement): Quality of education: Requires improvement; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Requires improvement |
| Hitchin Boys' School | Secondary | 11–18 | 1 km (0.6 miles) | Report card (Nov 2025): Curriculum and teaching: Strong standard; Achievement: Strong standard; Attendance and behaviour: Exceptional; Personal development and wellbeing: Exceptional; Inclusion: Exceptional; Leadership and governance: Exceptional; Post-16 provision: Strong standard; Safeguarding standards: Met |
| Mary Exton Primary School | Primary | 5–11 | 1.1 km (0.7 miles) | Good (Sep 2022, overall grade under the previous framework) |
| York Road Nursery School | Nursery | 2–5 | 1.3 km (0.8 miles) | No published inspection |
| Wilshere-Dacre Junior Academy | Primary | 7–11 | 1.3 km (0.8 miles) | No published inspection |
| Samuel Lucas Primary School | Primary | 4–11 | 1.4 km (0.9 miles) | Outstanding (Oct 2023, overall grade under the previous framework) |
| Purwell Primary School | Primary | 3–11 | 1.7 km (1 mile) | No overall grade (Sep 2024, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Highover Primary School | Primary | 4–11 | 1.8 km (1.1 miles) | No overall grade (Jan 2025, graded inspection without an overall judgement): Quality of education: Outstanding; Behaviour and attitudes: Outstanding; Personal development: Outstanding; Leadership and management: Outstanding |
Nurseries and childcare
The ten nearest nurseries, pre-schools and clubs are all within 720 m (0.4 miles); the nearest is 310 m from the middle of the street.
| Provider | Kind | Places | Latest inspection | Distance |
|---|---|---|---|---|
| Theatretrain Hitchin SG4 9RS | Out-of-school day care (over fives) | Not inspected yet | 310 m | |
| uPlay Sports CIC SG4 9RS | Out-of-school day care (over fives) | Not inspected yet | 310 m | |
| The Cookie Club SG4 9AG | Out-of-school day care | 30 | Not inspected yet | 330 m |
| Goslings Playgroup SG4 9HT | Sessional day care | 36 | Good (Dec 2022, overall grade under the previous framework) | 340 m |
| The Cookie Club SG4 9HT | Out-of-school day care (over fives) | Not inspected yet | 340 m | |
| Hitchin Holiday Camps Whitehill SG4 9HT | Out-of-school day care | 40 | Not inspected yet | 340 m |
| Highbury Lodge Day Nursery SG4 9RW | Full day care | 83 | Outstanding (Oct 2023, overall grade under the previous framework) | 440 m (0.3 miles) |
| Play Aloud St Andrews SG4 9RD | Sessional day care | 78 | Outstanding (Feb 2023, overall grade under the previous framework) | 620 m (0.4 miles) |
| Rising Stars Wrap Around Clubs SG4 9QB | Out-of-school day care | 64 | Not inspected yet | 670 m (0.4 miles) |
| Millennium First Steps Nursery Ltd SG4 9UW | Full day care | 116 | Good (Jun 2021, overall grade under the previous framework) | 720 m (0.4 miles) |
Ofsted also registers 841 childminders and 251 home childcarers (nannies) in Hertfordshire. It does not publish their addresses, so they cannot be shown here; the council's family information service lists those taking children.
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Highbury Post Office | Retailers - other | 130 m | 5 Very good | 12 Dec 2024 |
| Hitchin Girls School SG4 9RS | School/college/university | 310 m | 5 Very good | 22 Oct 2026 |
| Highbury Infant School SG4 9AG | School/college/university | 330 m | 5 Very good | 21 Oct 2026 |
| Whitehill Junior School SG4 9HT | School/college/university | 340 m | 5 Very good | 9 Dec 2024 |
| The Goslings SG4 9HT | Hospitals/Childcare/Caring Premises | 340 m | 5 Very good | 20 Jan 2012 |
| Highbury Lodge Day Nursery SG4 9RW | Hospitals/Childcare/Caring Premises | 440 m (0.3 miles) | 5 Very good | 13 Oct 2026 |
| Highbury Rise SG4 9RW | Hospitals/Childcare/Caring Premises | 470 m (0.3 miles) | 3 Generally satisfactory | 27 Nov 2025 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Anti-social behaviour | 6 |
| Vehicle crime | 5 |
| Criminal damage and arson | 3 |
| Violence and sexual offences | 3 |
| Public order | 1 |
| Robbery | 1 |
| Other theft | 1 |
| Burglary | 1 |
| Shoplifting | 1 |
Most of these are attached to: On or near Acre Piece (9); On or near Pulter'S Way (6); On or near Newtons Way (2); On or near Whitegale Close (2); On or near The Chilterns (2).
Road safety
3 collisions in which someone was hurt were reported on and around the street in 2021 to 2025: 0 fatal, 0 serious and 3 slight. 2 involved a pedestrian; 1 involved a child under 16. 33% happened in the dark, and 33% on a wet or icy road. Most were on roads with a 30 mph limit.
| Year | Collisions | Fatal or serious |
|---|---|---|
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| Date | Severity | Who was hurt | Road | Conditions |
|---|---|---|---|---|
| 31 May 2024 19:55 | Slight | 1 person | Minor road, 30 mph | Daylight |
| 9 Dec 2021 18:30 | Slight | 1 person: 1 pedestrian | Minor road, 30 mph | Dark, street lights on, wet road |
| 24 Mar 2021 08:42 | Slight | 1 person: 1 pedestrian, 1 child | Minor road, 30 mph | Daylight |
Only collisions in which someone was hurt and which the police were told about are here: damage-only collisions and near misses are not, and some injuries are never reported. Positions are recorded by the police, usually to within a few metres. Each year's figures are published the following September.
Traffic on nearby roads
No traffic count point is within 500 m (0.3 miles) of the street's postcodes. The Department for Transport counts every motorway and A road and only a sample of minor roads, so a quiet residential street usually has none.
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 42 | 40 |
| Children under 15 | 18% | 17% |
| Aged 65 and over | 19% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 80% | 61% |
| Owned outright | 40% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 6% | 17% |
| Private rented | 14% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 63% | 57% |
| Unemployment (of those working or looking for work) | 5% | 6% |
| Retired (of adults) | 22% | 22% |
| Long-term sick or disabled (of adults) | under 1% | 4% |
| Work mainly from home (of those in work) | 55% | 32% |
| Travel to work by car or van | 32% | 48% |
| By train, Underground, metro or tram | 3% | 4% |
| By any public transport, including bus | 3% | 8% |
| On foot or by bicycle | 9% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 58% | 65% |
| Work 30 km (19 miles) or more away | 16% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 57% | 34% |
| No qualifications | 5% | 18% |
| Apprenticeship as highest qualification | 3% | 5% |
| Main language English (aged 3 and over) | 97% | 91% |
| Cannot speak English well or at all | 0% | 2% |
Deprivation
The neighbourhood around this street is in decile 10 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
- SG4 9LB: 14 addresses
- SG4 9LA: 1 address of 6 in the postcode
- SG4 9LD: 1 address of 19 in the postcode
Nearby streets
Acre Piece · Highbury Road · Hollow Lane · Riddy Hill Close · Whitegale Close · South Hill Close · Orlando Close · The Chilterns · Hazel Court · Newtons Way · Hollow Lane · Passingham Avenue
All the streets in SG4 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; road collisions count only those in which someone was hurt and the police were told.
- 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.