SL4 1SY

a postcode in Windsor and Maidenhead

Introduced in January 1980

SL4 1SY	Normal (geographic) postcodes	Large user postcodes

The nearby postcodes map only shows currently active postcodes. Postcode markers will cluster if they are close together, which may happen in densly populated built-up areas or where single premises have multiple postcodes.

Streets Associated with SL4 1SY

Mountbatten Square - 35 properties, USRN 44401082

Unnamed road - 1 property, USRN 44400306

Street names are those nearest to properties in this postcode, they are not necessarily the postal address

Coordinates

Latitude: 51.4816 / 51°28'53"N

Longitude: -0.6129 / 0°36'46"W

UTM Reference: 30U 665751 5706081

OS Easting: 496417

OS Northing: 176757

OS Grid: SU964767

Location Encoding

Mapcode Local: GBR F8L.1VN

Mapcode Global: VHFTG.B1B2

Open Location Code: 9C3XF9JP+JR

Maidenhead Locator System: IO91ql65

Demographics

Urban/Rural Indicator: C1

urban city or town
a town or city, surrounded by populated countryside

ONS Population Classification: 3c2

Multicultural and Educated Urbanites
Diverse Educated Urban Singles
Career Progression

Index of Multiple Deprivation (IMD): 24265 / 32844

8th decile
less deprived

Demographics are based on the LSOA containing this postcode and not necessarily this postcode alone

Sun and Moon Times for SL4 1SY on Monday 29 June 2026

Nautical twilight begins (First light)	02:48
Civil twilight begins (Dawn)	04:01
Sunrise	04:48
Transit (sun is at its highest)	13:05
Sunset	21:23
Civil twilight ends (Dusk)	22:10
Nautical twilight ends (Nightfall)	23:23

Hours of daylight today	04:18 to 21:53
Hours of darkness tonight (lighting-up time)	21:53 to 04:19
Moon Phase	Full Moon
Moon Sets	02:33
Moon Rises	20:44

For a full sun and moon calendar for SL4 1SY, go to The Time and Place

Residential Property Sales in SL4 1SY

Date	Address	Property Type	Tenure	Price
11 January 2024	41 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£255,000
28 September 2021	37 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£250,000
27 September 2021	57 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£282,000
21 December 2020	47 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£318,000
2 October 2019	44 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£245,000
20 September 2019	34 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£264,000
6 January 2017	51 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£320,000
24 August 2016	46 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£345,000
10 December 2013	46 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£250,000
11 July 2013	30 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£245,000
5 October 2012	44 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£186,000
27 November 2008	33 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£210,000
9 May 2008	57 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£242,000
31 January 2008	49 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£230,000
9 November 2007	34 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£229,000
3 October 2007	37 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£185,000
18 January 2007	54 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£249,950
15 April 2005	57 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£170,000
19 July 2004	46 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£222,000
19 April 2004	34 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£179,950
13 June 2003	50 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£170,000
30 May 2003	44 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£146,000
31 January 2003	44 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£128,000
20 December 2001	51 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£139,500
12 October 2001	29 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£112,000
26 June 2000	60 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£87,000
19 July 1999	57 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£89,000
16 October 1998	41 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£79,950
27 August 1998	30 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£99,950
27 March 1997	34 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£56,000
21 February 1997	30 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£63,000
6 December 1996	54 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£63,000
3 April 1995	49 Mountbatten Square, Windsor SL4 1SY	Flat/apartment	Leasehold	£54,000

Key to property sale icons:

	First sale of newbuild property. This includes new properties created from existing properties, such as residential conversions of commercial or agricultural property, or subdivision of a larger residential property.
	Subsequent sale of existing property.
	Standard sale at market value to private individual.
	Additional (non-standard) sale. This includes repossessions, buy-to-lets and transfers of property sold to non-private individuals.

Elected Representatives for SL4 1SY

United Kingdom Parliament

Constituency

Windsor

MP

Jack Rankin Conservative

Windsor and Maidenhead Council

Unitary Authority ward (UTW)

Eton & Castle

Councillors

Devon Davies Liberal Democrats

Julian Tisi Liberal Democrats

Mark Wilson Liberal Democrats

Elected representative data is updated approximately monthly, so may not include recent by-elections or vacancies.

Government Statistical Services (GSS) data for SL4 1SY

Code	Name	Data Type	Data Theme	Active Since	Data Owner
E00083534		Output Areas	Statistical Building Block	1 January 2009	ONS
E01016545	Windsor and Maidenhead 012A	Lower layer Super Output Areas	Statistical Building Block	1 February 2004	ONS
E02003432	Windsor and Maidenhead 012	Middle layer Super Output Areas	Statistical Building Block	1 August 2004	ONS
E05012504	Eton & Castle	Electoral Wards/Divisions	Administrative/Electoral	2 May 2019	DLUHC
E06000040	Windsor and Maidenhead	Unitary Authorities	Administrative	1 January 2009	DLUHC
E12000008	South East	Regions	Administrative	1 January 2009	DLUHC
E14001588	Windsor	Westminster Parliamentary Constituencies	Electoral	4 July 2024	LGBC
E23000029	Thames Valley	Police Force Areas	Other	1 January 2009	Home Office
E30000266	Slough and Heathrow	Travel to Work Areas	Other	31 July 2015	ONS
E33037198		Workplace Zones	Census	31 December 2011	ONS
E37000035	Thames Valley Berkshire	Local Enterprise Partnerships	Other	28 October 2010	BEIS
E38000252	NHS Frimley ICB - D4U1Y	Sub Integrated Care Board Locations	Health	1 July 2022	ODS
E40000005	South East	NHS England Regions	Health	1 April 2018	ODS
E43000259	Windsor and Maidenhead, unparished area	Non-Civil Parished Areas	Census	1 April 2019	ONS
E54000034	NHS Frimley Integrated Care Board	Integrated Care Boards	Health	1 July 2022	ODS
E56000012	Surrey and Sussex	Cancer Alliances	Health	1 September 2016	NHS England
E63012122	Windsor	Built Up Areas	Census	17 April 2024	OS
E65000001	England Non-National Park Area	England Non-National Park Area	Census	27 February 2023	ONS
E92000001	England	Country	Administrative	1 January 2009	ONS

The UK Postcode Database