W1U 3 postcode sector in the W1U district

W1U 3 is a sector of the W1U district: every postcode that starts W1U 3. It has 135 postcodes in use, 4 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the W1U 3 sector, by flood risk

Map of every postcode in the W1U 3 sector, by flood risk Of the 135 postcodes in the W1U 3 sector that ONS places, 135 are not on the Environment Agency's at-risk list. Places named: City of Westminster. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A40A41A5204 W1U 3AA: not on the flood risk listW1U 3AB: not on the flood risk listW1U 3AE: not on the flood risk listW1U 3AF: not on the flood risk listW1U 3AH: not on the flood risk listW1U 3AJ: not on the flood risk listW1U 3AW: not on the flood risk listW1U 3AY: not on the flood risk listW1U 3AZ: not on the flood risk listW1U 3BD: not on the flood risk listW1U 3BL: not on the flood risk listW1U 3BN: not on the flood risk listW1U 3BQ: not on the flood risk listW1U 3BW: not on the flood risk listW1U 3BX: not on the flood risk listW1U 3BZ: not on the flood risk listW1U 3DA: not on the flood risk listW1U 3DB: not on the flood risk listW1U 3DE: not on the flood risk listW1U 3DG: not on the flood risk listW1U 3DJ: not on the flood risk listW1U 3DL: not on the flood risk listW1U 3DP: not on the flood risk listW1U 3DR: not on the flood risk listW1U 3DT: not on the flood risk listW1U 3DU: not on the flood risk listW1U 3DY: not on the flood risk listW1U 3DZ: not on the flood risk listW1U 3EA: not on the flood risk listW1U 3EB: not on the flood risk listW1U 3ED: not on the flood risk listW1U 3EE: not on the flood risk listW1U 3EH: not on the flood risk listW1U 3EJ: not on the flood risk listW1U 3EL: not on the flood risk listW1U 3EN: not on the flood risk listW1U 3ES: not on the flood risk listW1U 3ET: not on the flood risk listW1U 3EU: not on the flood risk listW1U 3EX: not on the flood risk listW1U 3EY: not on the flood risk listW1U 3HA: not on the flood risk listW1U 3HB: not on the flood risk listW1U 3HD: not on the flood risk listW1U 3HE: not on the flood risk listW1U 3HF: not on the flood risk listW1U 3HJ: not on the flood risk listW1U 3HN: not on the flood risk listW1U 3HP: not on the flood risk listW1U 3HR: not on the flood risk listW1U 3HX: not on the flood risk listW1U 3HZ: not on the flood risk listW1U 3JA: not on the flood risk listW1U 3JD: not on the flood risk listW1U 3JG: not on the flood risk listW1U 3JP: not on the flood risk listW1U 3JR: not on the flood risk listW1U 3JU: not on the flood risk listW1U 3JY: not on the flood risk listW1U 3LR: not on the flood risk listW1U 3NL: not on the flood risk listW1U 3PA: not on the flood risk listW1U 3PB: not on the flood risk listW1U 3PD: not on the flood risk listW1U 3PF: not on the flood risk listW1U 3PL: not on the flood risk listW1U 3PP: not on the flood risk listW1U 3PT: not on the flood risk listW1U 3PW: not on the flood risk listW1U 3PY: not on the flood risk listW1U 3QA: not on the flood risk listW1U 3QB: not on the flood risk listW1U 3QD: not on the flood risk listW1U 3QE: not on the flood risk listW1U 3QF: not on the flood risk listW1U 3QH: not on the flood risk listW1U 3QJ: not on the flood risk listW1U 3QL: not on the flood risk listW1U 3QN: not on the flood risk listW1U 3QP: not on the flood risk listW1U 3QU: not on the flood risk listW1U 3QW: not on the flood risk listW1U 3QY: not on the flood risk listW1U 3QZ: not on the flood risk listW1U 3RB: not on the flood risk listW1U 3RD: not on the flood risk listW1U 3RF: not on the flood risk listW1U 3RT: not on the flood risk listW1U 3RW: not on the flood risk listW1U 3RX: not on the flood risk listW1U 3RY: not on the flood risk listW1U 3RZ: not on the flood risk listW1U 3SB: not on the flood risk listW1U 3SD: not on the flood risk list City of Westminster Map of every postcode in the W1U 3 sector, by flood risk Of the 135 postcodes in the W1U 3 sector that ONS places, 135 are not on the Environment Agency's at-risk list. Places named: City of Westminster. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. City of Westminster
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 135

Of the 135 postcodes in the W1U 3 sector that ONS places, 135 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. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

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

What do homes sell for in W1U 3?

HM Land Registry records one sale of homes in W1U 3 in the 12 months to August 2026: too few to give a typical price.

  • Flat or maisonette 1 sale, too few to price

Standard sales of homes at market value at the postcodes that start W1U 3. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

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 W1U 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

W1U 3AAW1U 3ABW1U 3AEW1U 3AFW1U 3AHW1U 3AJW1U 3AWW1U 3AYW1U 3AZW1U 3BDW1U 3BEW1U 3BFW1U 3BGW1U 3BLW1U 3BNW1U 3BQW1U 3BWW1U 3BXW1U 3BYW1U 3BZW1U 3DAW1U 3DBW1U 3DDW1U 3DEW1U 3DGW1U 3DHW1U 3DJW1U 3DLW1U 3DNW1U 3DPW1U 3DQW1U 3DRW1U 3DTW1U 3DUW1U 3DYW1U 3DZW1U 3EAW1U 3EBW1U 3EDW1U 3EEW1U 3EHW1U 3EJW1U 3ELW1U 3ENW1U 3ERW1U 3ESW1U 3ETW1U 3EUW1U 3EWW1U 3EXW1U 3EYW1U 3HAW1U 3HBW1U 3HDW1U 3HEW1U 3HFW1U 3HJW1U 3HNW1U 3HPW1U 3HQW1U 3HRW1U 3HSW1U 3HTW1U 3HWW1U 3HXW1U 3HZW1U 3JAW1U 3JBW1U 3JDW1U 3JGW1U 3JJW1U 3JLW1U 3JNW1U 3JPW1U 3JQW1U 3JRW1U 3JSW1U 3JUW1U 3JWW1U 3JXW1U 3JYW1U 3JZW1U 3LRW1U 3NLW1U 3PAW1U 3PBW1U 3PDW1U 3PFW1U 3PGW1U 3PHW1U 3PLW1U 3PPW1U 3PQW1U 3PTW1U 3PWW1U 3PYW1U 3PZW1U 3QAW1U 3QBW1U 3QDW1U 3QEW1U 3QFW1U 3QGW1U 3QHW1U 3QJW1U 3QLW1U 3QNW1U 3QPW1U 3QQW1U 3QRW1U 3QSW1U 3QTW1U 3QUW1U 3QWW1U 3QXW1U 3QYW1U 3QZW1U 3RBW1U 3RDW1U 3RFW1U 3RNW1U 3RTW1U 3RUW1U 3RWW1U 3RXW1U 3RYW1U 3RZW1U 3SAW1U 3SBW1U 3SDW1U 3SEW1U 3SGW1U 3SHW1U 3SJW1U 3TH

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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