SL4 3BD Windsor and Maidenhead
Live postcode, introduced January 1980. Ward: Eton & Castle. Region: South East.
Streets
- St Mark's Road, Windsor: 45 addresses
- Queens Road, Windsor: 2 addresses
Council tax
What each band costs in Windsor and Maidenhead in 2026-27: Band D £1,953 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,302 | £1,519 | £1,736 | £1,953 | £2,387 | £2,820 | £3,254 | £3,905 |
Homes by band in the neighbourhood around this postcode: most are in band D (31% of about 1,300 homes).
Planning and heritage
- Conservation area: no postcode centre in this postcode is in one.
- Listed buildings within 100 m of this postcode: 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 1.0 km
- Windsor Business Quarter, 67 Alma Road, Windsor: up to 315 homes, pending decision (270 m)
- King Edward VII Hospital, Windsor: up to 47 homes, not permissioned (380 m)
- Minton Place, Victoria Street, Windsor: up to 100 homes, not permissioned (410 m)
- Minton Place Victoria Street Windsor SL4 1EG (450 m)
- Territorial Army Centre Bolton Road Windsor, REC (830 m)
Flood risk
Rivers, the sea or surface water: in this postcode, 3 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 is in flood zone 2 or 3.
Height above sea level
The postcode's 47 addresses are between 22 m and 26 m above sea level (24 m on average).
Broadband
Superfast 100%, ultrafast 100%, gigabit 100% of premises; 0% cannot get 10 Mbit/s. Ofcom Connected Nations, data as at January 2026.
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Windsor and Eton Central 1.7 million journeys in 2024–25 | 720 m |
| Windsor and Eton Riverside 1.1 million journeys in 2024–25 | 1.1 km | |
| Datchet 228,000 journeys in 2024–25 | 2.5 km | |
| Bus stops | 7 stops within 400 m, 32 within 800 m; nearest King Edward VII Hospital Windsor | 310 m |
| Bus or coach station | Brunel Way Slough Town Centre | 4.1 km |
| Car parks | 4 within 800 m; nearest Victoria Street Car Park | 370 m |
| EV charging points | 10 within 1.6 km; nearest Alma Road | 110 m |
| Airport with scheduled flights | London Heathrow Airport LHR | 10.8 km |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 4 practices within 1.6 km; nearest Lee House Surgery | 180 m |
| Pharmacies | 5 pharmacies within 1.6 km; nearest Windsor Pharmacy | 260 m |
| NHS dentists | 11 practices within 1.6 km; nearest Complete Dental | 130 m |
| Hospital | Hrh Princess Christian's Hospital | 310 m |
| Police station | Thames Valley Police - Windsor Police Station | 140 m |
| Cash machines | 3 machines within 800 m; nearest Sant Kishan Singh Supermarket Ltd Cashzone | 150 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 4 within 800 m; nearest Bachelors Acre 6,860 m² | 570 m |
| Largest park within 800 m | Windsor Great Park 1,171 ha | 690 m |
| Play area | 6 within 800 m; nearest Unnamed 1,740 m² | 330 m |
| Playing field | 3 within 800 m; nearest Vansittart Recreation Ground Park 2.5 ha | 330 m |
| Allotments | 5 within 800 m; nearest Unnamed 1,570 m² | 510 m |
Within 800 m: 4 parks and gardens, 1,174 hectares in all.
Landmarks
The nearest historic landmark is Hadleigh House, a listed building (Grade II*), 700 m north-east. 216 listed buildings are within 1.0 km, 1 of them Grade I and 12 of them Grade II*.
| Name | What it is | From the postcode's centre |
|---|---|---|
| Hadleigh House | Listed building, Grade II* | 700 m north-east |
| 12-16, Park Street | Listed building, Grade II* | 750 m north-east |
| Guildhall | Listed building, Grade I | 760 m north-east |
| 9-11, Park Street | Listed building, Grade II* | 770 m north-east |
| Windsor Castle | Scheduled monument | 1.0 km north-east |
| Moated site at Moat Park, New Windsor | Scheduled monument | 1.2 km south-west |
| The Royal Estate, Windsor: Frogmore Gardens | Registered park or garden, Grade I | 1.4 km east |
| The Royal Estate, Windsor: Windsor Castle and Home Park | Registered park or garden, Grade I | 1.4 km east |
| Name | What it is | From the postcode's centre |
|---|---|---|
| Deadwater Ait | Island | 900 m north |
| Firework Ait | Island | 920 m north |
| Baths Island | Island | 1.0 km north |
| Queen Mary's Plantation | Wood | 1.2 km south |
| Broad Water | Lake or reservoir | 1.3 km north-east |
| Peter's Hill | Hill | 2.5 km south-east |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 13.0 | 40 | 10 |
| Fine particles (PM2.5) | 7.6 | 20 | 5 |
| Particles (PM10) | 11.5 | 40 | 15 |
All three are within the UK legal limits; nitrogen dioxide and PM2.5 are above the WHO guideline, as in most towns and cities.
Road and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 55 to 59 | 13 | 0 |
| Under 55 | 34 | 47 |
13 of the postcode's 47 addresses are modelled at 55 dB or more from road traffic, above the WHO guidelines.
People and work
Who lives here
| Around this postcode | England | |
|---|---|---|
| Median age | 45 | 40 |
| Children under 15 | 10% | 17% |
| Aged 65 and over | 19% | 18% |
Homes
| Around this postcode | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 55% | 61% |
| Owned outright | 34% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 2% | 17% |
| Private rented | 43% | 21% |
Work and commuting
| Around this postcode | England | |
|---|---|---|
| Adults (16 and over) in work | 66% | 57% |
| Unemployment (of those working or looking for work) | 3% | 6% |
| Retired (of adults) | 21% | 22% |
| Long-term sick or disabled (of adults) | 0% | 4% |
| Work mainly from home (of those in work) | 59% | 32% |
| Travel to work by car or van | 27% | 48% |
| By train, Underground, metro or tram | 4% | 4% |
| By any public transport, including bus | 4% | 8% |
| On foot or by bicycle | 8% | 10% |
| Work within 10 km of home (of those who travel to work) | 61% | 65% |
| Work 30 km or more away | 14% | 8% |
Education and languages
| Around this postcode | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 61% | 34% |
| No qualifications | 8% | 18% |
| Apprenticeship as highest qualification | 3% | 5% |
| Main language English (aged 3 and over) | 86% | 91% |
| Cannot speak English well or at all | under 1% | 2% |
Deprivation
The neighbourhood around this postcode 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.
The full dossier for this postcode's main street is on St Mark's Road.