Swinegate Grantham, South Kesteven
100 addresses across 4 postcodes (NG31), about 200 m long, classed as a local road. USRN 35804001.
- Sales: 50 recorded sales since 1995; in 2025 the median was £155,000 across 1 sale.
- Energy: 65 homes have an energy certificate (B: 11, C: 22, D: 16, E: 13, F: 3).
- Flood: 10 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 A; Band D in South Kesteven costs £2,260 a year in 2026-27.
- Broadband: Gigabit broadband is available to 0% to 85% of premises.
- Transport: The nearest railway station is Grantham, about 1 km (0.6 miles) away in a straight line.
- Green space: The nearest park or garden, Wyndham Park, is about 380 m away.
- Air: Background air pollution in 2024 was 7.6 µg/m³ of nitrogen dioxide and 7.0 of PM2.5, within UK legal limits.
- Height: Its addresses are 53 to 57 m above sea level.
- Noise: 41 of its 100 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Vine Street Surgery, about 150 m away, with 3 practices within 1.6 km (1 mile).
- People: About 500 people lived in the census areas around it in 2021; 19% of households owned their home and 25% of adults held a degree or other higher qualification.
- Crime: 356 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 |
|---|---|---|---|---|
| 2025 | 1 | £155,000 | £155,000 | £155,000 |
| 2024 | 3 | £141,500 | £100,000 | £184,000 |
| 2023 | 2 | £157,000 | £144,000 | £170,000 |
| 2022 | 1 | £305,000 | £305,000 | £305,000 |
| 2021 | 1 | £435,000 | £435,000 | £435,000 |
| 2019 | 1 | £84,500 | £84,500 | £84,500 |
| 2018 | 2 | £260,000 | £227,500 | £292,500 |
| 2017 | 6 | £237,475 | £64,950 | £380,000 |
| 2016 | 1 | £134,000 | £134,000 | £134,000 |
| 2015 | 2 | £219,500 | £74,000 | £365,000 |
| 2014 | 1 | £75,000 | £75,000 | £75,000 |
| 2013 | 1 | £210,000 | £210,000 | £210,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 1 Aug 2025 | 9 NG31 6RJ | Terraced | £155,000 | |
| 19 Dec 2024 | 39 NG31 6RL | Terraced | £184,000 | |
| 2 Aug 2024 | 45B NG31 6RL | Flat or maisonette | £100,000 | Leasehold. |
| 1 Feb 2024 | 10 NG31 6RJ | Semi-detached | £141,500 | |
| 15 Dec 2023 | 15 NG31 6RJ | Other | £400,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 31 Jul 2023 | 14 NG31 6RJ | Terraced | £170,000 | |
| 15 Mar 2023 | 40 NG31 6RL | Terraced | £144,000 | |
| 12 Sep 2022 | 21 NG31 6RJ | Detached | £305,000 | |
| 19 Jul 2022 | 40 NG31 6RL | Terraced | £100,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 6 Jul 2021 | 22 NG31 6RJ | Other | £515,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 29 Jun 2021 | 12 NG31 6RJ | Terraced | £165,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 29 Jun 2021 | 13 NG31 6RJ | Terraced | £153,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 26 Mar 2021 | 41 NG31 6RL | Detached | £435,000 | |
| 19 Feb 2021 | 42 NG31 6RL | Flat or maisonette | £73,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 8 Oct 2019 | 20 NG31 6RJ | Other | £100,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 5 Apr 2019 | 45A NG31 6RL | Semi-detached | £84,500 | Leasehold. |
| 16 Nov 2018 | 1, ST WULFRAMS COURT NG31 6RL | Terraced | £227,500 | Leasehold. |
| 19 Oct 2018 | 21 NG31 6RJ | Detached | £292,500 | |
| 15 Oct 2018 | 22 NG31 6RJ | Other | £195,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 10 Oct 2018 | 20B NG31 6RJ | Semi-detached | £205,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 1 Nov 2017 | 21 NG31 6RJ | Detached | £114,000 | |
| 22 Sep 2017 | 3, SPIRE MEWS, 6A NG31 6RJ | Terraced | £239,950 | |
| 9 Aug 2017 | 1, SPIRE MEWS, 6A NG31 6RJ | Semi-detached | £235,000 | |
| 31 May 2017 | 2, SPIRE MEWS, 6A NG31 6RJ | Semi-detached | £250,000 | |
| 11 Apr 2017 | 2 NG31 6RJ | Terraced | £380,000 | |
| 3 Mar 2017 | 45 NG31 6RL | Flat or maisonette | £64,950 | Leasehold. |
| 3 Aug 2016 | 13 NG31 6RJ | Terraced | £134,000 | |
| 10 Jun 2016 | 2 NG31 6RJ | Other | £240,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 8 Oct 2015 | 7 NG31 6RJ | Terraced | £74,000 | |
| 16 Mar 2015 | 41 NG31 6RL | Detached | £365,000 | |
| 28 Oct 2014 | 8 NG31 6RJ | Terraced | £75,000 | |
| 7 Jan 2013 | 41 NG31 6RL | Detached | £210,000 | |
| 15 Apr 2011 | 26 NG31 6RL | Detached | £80,000 | |
| 10 Oct 2010 | 46 NG31 6RL | Detached | £249,000 | |
| 23 Apr 2009 | 20B NG31 6RJ | Semi-detached | £90,000 | |
| 11 May 2007 | 45B NG31 6RL | Flat or maisonette | £114,000 | Leasehold. |
| 22 Aug 2003 | 34 NG31 6RL | Terraced | £247,000 | |
| 20 Sep 2002 | 34 NG31 6RL | Terraced | £137,500 | |
| 15 May 2002 | 10 NG31 6RJ | Semi-detached | £102,500 | |
| 1 Sep 2001 | 20 NG31 6RJ | Terraced | £45,000 | |
| 19 Jan 2000 | 45A NG31 6RL | Semi-detached | £42,000 | Leasehold. |
| 5 Nov 1999 | 4 NG31 6RJ | Detached | £86,500 | |
| 22 Sep 1999 | 13 NG31 6RJ | Terraced | £33,000 | |
| 1 Apr 1999 | 12 NG31 6RJ | Terraced | £50,000 | |
| 9 Oct 1998 | 10 NG31 6RJ | Semi-detached | £60,000 | |
| 17 Dec 1997 | 42 NG31 6RL | Flat or maisonette | £38,400 | Leasehold. |
| 26 Aug 1997 | 12 NG31 6RJ | Terraced | £44,000 | |
| 19 May 1997 | 35 NG31 6RL | Terraced | £30,000 | |
| 24 Jan 1997 | 42 NG31 6RL | Flat or maisonette | £35,000 | Leasehold. |
| 20 Dec 1995 | 42 NG31 6RL | Flat or maisonette | £30,000 | Leasehold. |
Energy performance certificates
65 homes with a current certificate; median floor area 62 m². Most common: Flat (42); House, mid-terrace (11); House, detached (3). Built: before 1900 (35); 2025 (20); 1983-1990 (4). Tenure at assessment: rented (private) (24); owner-occupied (13).
Council tax
What each band costs in South Kesteven in 2026-27: Band D £2,260 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,507 | £1,758 | £2,009 | £2,260 | £2,762 | £3,264 | £3,767 | £4,520 |
Homes by band in the neighbourhoods around this street: most are in band A (70% of about 2,190 homes).
Planning and heritage
- Conservation area: yes, Grantham. Extensions, demolition, some windows and doors, and work on trees need consent.
- Listed buildings on or by this street: 27.
- 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
- VINE HOUSE, grade II*
- 11, SWINEGATE, grade II
- 11, VINE STREET, grade II
- 12 AND 12A, SWINEGATE, grade II
- 14, SWINEGATE, grade II
- 15 AND 15A, SWINEGATE, grade II
- 2, SWINEGATE, grade II
- 21A AND 21B, SWINEGATE, grade II
- 3 AND 4, SWINEGATE, grade II
- 33 and 35, Watergate, grade II
- 38A, CHURCH TREES, grade II
- 39 AND 40, CHURCH TREES, grade II
- 41, CHURCH TREES, grade II
- 44 AND 45, SWINEGATE, grade II
- 44 AND 46, WATERGATE, grade II
- 5, SWINEGATE, grade II
- 6 AND 7, VINE STREET, grade II
- 6, SWINEGATE, grade II
- 7, SWINEGATE, grade II
- 8 and 9 Vine Street (including the Blue Pig Inn), grade II
- 8 AND 9, SWINEGATE, grade II
- GARDEN WALL AND GATES TO THE VICARAGE, grade II
- HURST'S ALMSHOUSES, grade II
- MORRIS HOUSE, grade II
- NO 10 VINE STREET AND NO 15 ELMER STREET NORTH, grade II
- STABLE TO VINE HOUSE (BETWEEN NOS 11 AND 13), grade II
- THE VICARAGE, grade II
Roadworks
Finished in the last three months
- 25 September 2026 to 28 September 2026: BT, Utility repair and maintenance works, some carriageway incursion, on the footway, carriageway (minor works)
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 10 addresses are in areas at high risk, 0 at medium risk and 8 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.
Rivers and the sea alone: of the 64 homes the Environment Agency counts, 6 are in areas at high risk, 0 medium, 0 low and 0 very low.
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 |
|---|---|---|---|
| NG31 6RJ | not in 2 or 3 | 4 / 0 / 0 | unlikely |
| NG31 6RL | not in 2 or 3 | 5 / 0 / 7 | unlikely |
| NG31 6RW | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| NG31 6NS | not in 2 or 3 | 1 / 0 / 1 | unlikely |
Height above sea level
The street's 105 addresses are between 53 m and 57 m above sea level (55 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| NG31 6NS | 89% | 85% | 85% | 0% |
| NG31 6RJ | 100% | 100% | 60% | 0% |
| NG31 6RL | 100% | 91% | 79% | 0% |
| NG31 6RW | 100% | 75% | 0% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Grantham 1.5 million journeys in 2024–25 | 1 km (0.6 miles) |
| Bottesford 57,000 journeys in 2024–25 | 10.7 km (6.7 miles) | |
| Ancaster 5,530 journeys in 2024–25 | 10.8 km (6.7 miles) | |
| Bus stops | 10 stops within 400 m (0.2 miles), 40 within 800 m (0.5 miles); nearest The King's School Grantham | 120 m |
| Bus or coach station | Bus Station Grantham | 610 m (0.4 miles) |
| EV charging points | 2 within 1.6 km (1 mile); nearest InstaVolt Charging Station | 1 km (0.6 miles) |
| Airport with scheduled flights | East Midlands Airport EMA | 47.1 km (29 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 3 practices within 1.6 km (1 mile); nearest Vine Street Surgery | 150 m |
| Pharmacies | 8 pharmacies within 1.6 km (1 mile); nearest Asda Pharmacy | 210 m |
| NHS dentists | 6 practices within 1.6 km (1 mile); nearest Genesis Dental Care | 360 m |
| Hospital | Grantham & District Hospital | 680 m (0.4 miles) |
| Police station | Lincolnshire Police | 690 m (0.4 miles) |
| Cash machines | 2 machines within 800 m (0.5 miles); nearest Harvest Energy - Grantham Cashzone | 270 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 7 within 800 m (0.5 miles); nearest Wyndham Park 2.9 ha | 380 m |
| Largest park within 800 m (0.5 miles) | Queen Elizabeth Park 11 ha | 490 m (0.3 miles) |
| Play area | 5 within 800 m (0.5 miles); nearest Unnamed 970 m² | 430 m (0.3 miles) |
| Playing field | 2 within 800 m (0.5 miles); nearest Unnamed 3.0 ha | 470 m (0.3 miles) |
| Allotments | 2 within 800 m (0.5 miles); nearest Unnamed 4,380 m² | 220 m |
Within 800 m (0.5 miles): 7 parks and gardens, 17 hectares in all.
Landmarks
The nearest historic landmark is War Memorial in the Churchyard of Church of St Wulfram, a listed building (Grade II*), 90 m east. 166 listed buildings are within 1 km (0.6 miles), 7 of them Grade I and 4 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| War Memorial in the Churchyard of Church of St Wulfram | Listed building, Grade II* | 90 m east |
| Vine House | Listed building, Grade II* | 130 m south |
| School House (Headmaster's Residence) | Listed building, Grade I | 140 m east |
| King's School ('Old School' Fronting Church Street) | Listed building, Grade I | 140 m east |
| Grantham market cross | Scheduled monument | 230 m south |
| Conduit House, Market Place | Scheduled monument | 260 m south |
| Name | What it is | From the middle of the street |
|---|---|---|
| Hall's Hill | Hill | 1.7 km (1.1 miles) east |
| Brickkiln Plantation | Wood | 2.4 km (1.5 miles) north |
| Villa Pond | Lake or reservoir | 2.8 km (1.7 miles) north-east |
| Stubbock Hill | Hill | 2.8 km (1.7 miles) north-west |
| Towthorpe Hollow Ponds | Lake or reservoir | 2.8 km (1.8 miles) north-east |
| Mill Hill | Hill | 3.1 km (1.9 miles) west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 7.6 | 40 | 10 |
| Fine particles (PM2.5) | 7.0 | 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 |
|---|---|---|
| 70 to 74 | 1 | 0 |
| 60 to 64 | 8 | 0 |
| 55 to 59 | 32 | 0 |
| Under 55 | 59 | 100 |
41 of the street's 100 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 South Kesteven: see them on the South Kesteven page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| The King's School, Grantham | Secondary | 11–18 | 120 m | Good (Dec 2022, overall grade under the previous framework) |
| St Wulfram's National Church of England Primary School | Primary | 4–11 | 140 m | 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: Good |
| Wyndham Park Nursery School | Nursery | 2–5 | 560 m (0.3 miles) | No published inspection |
| Grantham College | 16 plus | 16–99 | 580 m (0.4 miles) | No published inspection |
| Kesteven and Grantham Girls' School | Secondary | 11–18 | 620 m (0.4 miles) | Outstanding (Sep 2023, overall grade under the previous framework) |
| The Little Gonerby Church of England Primary Academy, Grantham | Primary | 4–11 | 660 m (0.4 miles) | Good (Sep 2023, overall grade under the previous framework) |
| Saint Mary's Catholic Voluntary Academy Roman Catholic | Primary | 4–11 | 860 m (0.5 miles) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Requires improvement; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Cliffedale Primary School | Primary | 4–11 | 950 m (0.6 miles) | Good (Feb 2024, overall grade under the previous framework) |
| The Priory Ruskin Academy | Secondary | 11–19 | 950 m (0.6 miles) | Report card (Jun 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Strong standard; Leadership and governance: Expected standard; Post-16 provision: Expected standard; Safeguarding standards: Met |
| Huntingtower Community Primary Academy | Primary | 4–11 | 1 km (0.6 miles) | Report card (Jan 2026): Curriculum and teaching: Expected standard; Achievement: Needs attention; Attendance and behaviour: Strong standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met |
| The Isaac Newton Primary School | Primary | 4–11 | 1.1 km (0.7 miles) | No overall grade (Feb 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Outstanding; Personal development: Good; Leadership and management: Good |
| St Anne's Church of England Primary School, Grantham | Primary | 4–11 | 1.2 km (0.7 miles) | No published inspection |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Daily Delights Food NG31 6PR | Retailers - other | 50 m | 5 Very good | 25 Sep 2025 |
| Kings Court Nursing Home NG31 6RR | Hospitals/Childcare/Caring Premises | 80 m | 5 Very good | 20 Jan 2026 |
| St Wulframs Church Coffee Shop NG31 6RR | Restaurant/Cafe/Canteen | 80 m | 5 Very good | 28 Jan 2026 |
| Dance Pointe NG31 6RJ | Other catering premises | 90 m | Exempt | |
| Nobody Inn NG31 6NU | Pub/bar/nightclub | 100 m | 5 Very good | 9 Dec 2025 |
| Pinocchio Italian Takeaway NG31 6NU | Takeaway/sandwich shop | 100 m | 3 Generally satisfactory | 10 Dec 2025 |
| Belvoir House Care Home NG31 8BE | Hospitals/Childcare/Caring Premises | 100 m | 5 Very good | 28 Apr 2025 |
| Grantham Charcoal Grill NG31 6PR | Takeaway/sandwich shop | 110 m | 4 Good | 25 Apr 2025 |
| Chicken Palace NG31 6PR | Takeaway/sandwich shop | 110 m | 4 Good | 15 Jul 2025 |
| Impact Food Group @ The King's School NG31 6RP | School/college/university | 120 m | 5 Very good | 9 Oct 2025 |
| Albion House Day Nursery NG31 8BG | Hospitals/Childcare/Caring Premises | 130 m | 5 Very good | 12 Aug 2026 |
| The Blue Pig Inn NG31 6RQ | Pub/bar/nightclub | 150 m | 5 Very good | 26 Aug 2026 |
| Vine Street Coffee House NG31 6RQ | Restaurant/Cafe/Canteen | 150 m | 5 Very good | 14 Oct 2025 |
| Lidl NG31 6NS | Retailers - supermarkets/hypermarkets | 150 m | 5 Very good | 3 Mar 2026 |
| The Black Dog NG31 6NS | Pub/bar/nightclub | 150 m | Awaiting inspection |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 93 |
| Anti-social behaviour | 90 |
| Shoplifting | 58 |
| Public order | 37 |
| Other theft | 21 |
| Criminal damage and arson | 18 |
| Robbery | 10 |
| Vehicle crime | 7 |
| Burglary | 6 |
| Possession of weapons | 5 |
| Drugs | 5 |
| Other crime | 3 |
| Bicycle theft | 2 |
| Theft from the person | 1 |
Most of these are attached to: On or near Market Place (90); On or near Union Street (84); On or near Watergate (39); On or near Vine Street (27); On or near Petrol Station (21).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 48 | 40 |
| Children under 15 | 12% | 17% |
| Aged 65 and over | 28% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 19% | 61% |
| Owned outright | 14% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 37% | 17% |
| Private rented | 44% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 48% | 57% |
| Unemployment (of those working or looking for work) | 9% | 6% |
| Retired (of adults) | 29% | 22% |
| Long-term sick or disabled (of adults) | 7% | 4% |
| Work mainly from home (of those in work) | 18% | 32% |
| Travel to work by car or van | 41% | 48% |
| By train, Underground, metro or tram | 0% | 4% |
| By any public transport, including bus | 3% | 8% |
| On foot or by bicycle | 36% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 71% | 65% |
| Work 30 km (19 miles) or more away | 14% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 25% | 34% |
| No qualifications | 26% | 18% |
| Apprenticeship as highest qualification | 8% | 5% |
| Main language English (aged 3 and over) | 83% | 91% |
| Cannot speak English well or at all | 4% | 2% |
Deprivation
The neighbourhoods around this street are all in decile 3 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
- NG31 6RJ: 48 addresses
- NG31 6RL: 46 addresses of 49 in the postcode
- NG31 6RW: 5 addresses
- NG31 6NS: 1 address of 39 in the postcode
Nearby streets
St Wulframs Court · Brook Street · Church Street · Brownlow Street · Premier Court · Albion Place · Vine Street · Broad Street · Albion Street · Watergate · North Street · New Street
All the streets in NG31 and across South Kesteven.
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.