GU20 postcode district: Windlesham and around

GU20 is a postcode district mostly in Surrey, with 159 postcodes in use in 2 sectors. It has postcodes in Windlesham, Woking and Ascot and Sunningdale. It is split between 3 councils: Surrey Heath (146 postcodes), Woking (12) and Bracknell Forest (1). 158 are in Surrey. ONS lists no county for the other 1.

Postcodes in use
159
Sectors
2
Councils
3 councils
Places
3 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in GU20, by flood risk

Map of every postcode in GU20, by flood risk Of the 159 postcodes in GU20 that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 147 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Windlesham, West End and Chobham, Lightwater, Bisley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A319M3A3046A320 GU20 5AH: not on the flood risk listGU20 6AA: not on the flood risk listGU20 6AB: not on the flood risk listGU20 6AD: not on the flood risk listGU20 6AE: not on the flood risk listGU20 6AH: not on the flood risk listGU20 6AJ: not on the flood risk listGU20 6AN: not on the flood risk listGU20 6AP: not on the flood risk listGU20 6AQ: not on the flood risk listGU20 6AR: not on the flood risk listGU20 6AS: not on the flood risk listGU20 6AT: not on the flood risk listGU20 6AW: not on the flood risk listGU20 6AX: not on the flood risk listGU20 6BE: not on the flood risk listGU20 6BF: not on the flood risk listGU20 6BG: not on the flood risk listGU20 6BH: not on the flood risk listGU20 6BJ: not on the flood risk listGU20 6BL: not on the flood risk listGU20 6BN: not on the flood risk listGU20 6BP: not on the flood risk listGU20 6BQ: not on the flood risk listGU20 6BS: not on the flood risk listGU20 6BT: not on the flood risk listGU20 6BU: not on the flood risk listGU20 6BW: not on the flood risk listGU20 6BZ: not on the flood risk listGU20 6DA: not on the flood risk listGU20 6DB: not on the flood risk listGU20 6DD: not on the flood risk listGU20 6DE: not on the flood risk listGU20 6DG: not on the flood risk listGU20 6DH: not on the flood risk listGU20 6DL: not on the flood risk listGU20 6DN: not on the flood risk listGU20 6DP: not on the flood risk listGU20 6DQ: not on the flood risk listGU20 6DS: not on the flood risk listGU20 6DT: not on the flood risk listGU20 6DU: not on the flood risk listGU20 6DW: not on the flood risk listGU20 6DX: not on the flood risk listGU20 6DY: not on the flood risk listGU20 6EA: not on the flood risk listGU20 6ED: not on the flood risk listGU20 6EF: not on the flood risk listGU20 6EJ: not on the flood risk listGU20 6EN: not on the flood risk listGU20 6EW: not on the flood risk listGU20 6EY: not on the flood risk listGU20 6EZ: not on the flood risk listGU20 6HB: not on the flood risk listGU20 6HR: not on the flood risk listGU20 6HS: not on the flood risk listGU20 6HT: not on the flood risk listGU20 6HU: not on the flood risk listGU20 6HX: not on the flood risk listGU20 6HY: not on the flood risk listGU20 6HZ: not on the flood risk listGU20 6JA: not on the flood risk listGU20 6JB: not on the flood risk listGU20 6JD: not on the flood risk listGU20 6JE: not on the flood risk listGU20 6JJ: not on the flood risk listGU20 6JL: not on the flood risk listGU20 6JN: not on the flood risk listGU20 6JP: not on the flood risk listGU20 6JQ: not on the flood risk listGU20 6JR: not on the flood risk listGU20 6JS: not on the flood risk listGU20 6JT: not on the flood risk listGU20 6JU: not on the flood risk listGU20 6JW: not on the flood risk listGU20 6JX: not on the flood risk listGU20 6JY: not on the flood risk listGU20 6JZ: not on the flood risk listGU20 6LA: not on the flood risk listGU20 6LE: not on the flood risk listGU20 6LF: not on the flood risk listGU20 6LG: not on the flood risk listGU20 6LH: not on the flood risk listGU20 6LJ: not on the flood risk listGU20 6LN: not on the flood risk listGU20 6LP: not on the flood risk listGU20 6LR: not on the flood risk listGU20 6LS: not on the flood risk listGU20 6LT: not on the flood risk listGU20 6LU: not on the flood risk listGU20 6LW: not on the flood risk listGU20 6LX: not on the flood risk listGU20 6NA: not on the flood risk listGU20 6NB: not on the flood risk listGU20 6NE: not on the flood risk listGU20 6NF: not on the flood risk listGU20 6NG: not on the flood risk listGU20 6NQ: not on the flood risk listGU20 6PA: not on the flood risk listGU20 6PB: not on the flood risk listGU20 6PD: not on the flood risk listGU20 6PE: not on the flood risk listGU20 6PF: not on the flood risk listGU20 6PG: not on the flood risk listGU20 6PJ: not on the flood risk listGU20 6PL: not on the flood risk listGU20 6PN: not on the flood risk listGU20 6PP: not on the flood risk listGU20 6PQ: not on the flood risk listGU20 6PR: not on the flood risk listGU20 6PS: not on the flood risk listGU20 6PW: not on the flood risk listGU20 6QA: not on the flood risk listGU20 6QB: not on the flood risk listGU20 6QD: not on the flood risk listGU20 6QF: not on the flood risk listGU20 6QG: not on the flood risk listGU20 6QH: not on the flood risk listGU20 6QJ: not on the flood risk listGU20 6QN: not on the flood risk listGU20 6QQ: not on the flood risk listGU20 6HP: low flood risk at worstGU20 6JF: low flood risk at worstGU20 6LQ: low flood risk at worstGU20 6BY: medium flood risk at worstGU20 6AF: high flood riskGU20 6BX: high flood riskGU20 6DJ: high flood riskGU20 6EP: high flood riskGU20 6ET: high flood riskGU20 6EX: high flood riskGU20 6HD: high flood riskGU20 6HE: high flood risk WindleshamWest End and ChobhamLightwaterBisley 5 postcodes at high or medium risk, outlined: this goes to GU20 6ET, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in GU20, by flood risk Of the 159 postcodes in GU20 that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 147 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Windlesham, West End and Chobham, Lightwater, Bisley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A319M3A3046 WindleshamWest End and ChobhamLightwaterBisley
  • A home or business at high risk: 8
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 0
  • Not on the at-risk list: 147
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 159 postcodes in GU20 that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 147 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 170 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.3648, longitude -0.6500. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

GU20 6ET5 at high riskGU20 6AF4 at high riskGU20 6EP3 at high riskGU20 6BX2 at high riskGU20 6EX2 at high riskGU20 6HD2 at high riskGU20 6HE2 at high riskGU20 6DJ1 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. GU20 6ET, is the one with most homes and businesses at high risk.

What broadband can you get in GU20?

Ofcom reports on 139 of the 159 postcodes in GU20. At 95 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit95 of 139
Postcodes where every home can get superfast125 of 139

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is GU20 at risk of flooding?

12 of the 159 postcodes in GU20 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 22 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 12 of 159 postcodes High: 21Medium: 1Low: 11

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in GU20?

Homes in GU20 sold for a typical £672,500 in the 12 months to August 2026, across 54 sales, up 1.7% on the 12 months before, HM Land Registry's figures show.

£672,500 typical price, the 12 months to August 2026
12 months to August 2025
£661,000
12 months to August 2026
£672,500

▲ up 1.7% on the 12 months before

Detached£800,000 33 sales
Semi-detached£567,500 16 sales
Terraced 4 sales, too few to price
Flat or maisonette 1 sale, too few to price

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in GU20

Pick a sector, then a postcode. A sector is the district plus the next digit.

GU20 512 postcodesGU20 6147 postcodes
UK postcode format explained

Places in GU20

Towns and villages with postcodes in GU20, and how many each has here.

Windlesham postcodes,132Woking postcodes,12Ascot and Sunningdale postcodes,2

Who covers GU20

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Surrey Heath146
  • Woking12
  • Maidenhead1

Police force areas

  • Surrey158
  • Thames Valley1

Next to GU20

GU19 postcode district GU21 postcode district All GU districts Windlesham postcodes

"Next to" is by number: the districts before and after GU20 in the GU area.

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