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, and which are new since 2020

Map of every postcode in the W1U 3 sector, by new since 2020 Of the 135 postcodes in the W1U 3 sector that ONS places, 2 are new since 2020 and 133 were in use before 2020. 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: before 2020W1U 3AB: before 2020W1U 3AE: before 2020W1U 3AF: before 2020W1U 3AH: before 2020W1U 3AJ: before 2020W1U 3AW: before 2020W1U 3AY: before 2020W1U 3AZ: before 2020W1U 3BD: before 2020W1U 3BL: before 2020W1U 3BN: before 2020W1U 3BQ: before 2020W1U 3BW: before 2020W1U 3BX: before 2020W1U 3BZ: before 2020W1U 3DA: before 2020W1U 3DB: before 2020W1U 3DE: before 2020W1U 3DJ: before 2020W1U 3DL: before 2020W1U 3DP: before 2020W1U 3DR: before 2020W1U 3DT: before 2020W1U 3DU: before 2020W1U 3DY: before 2020W1U 3DZ: before 2020W1U 3EA: before 2020W1U 3EB: before 2020W1U 3ED: before 2020W1U 3EE: before 2020W1U 3EH: before 2020W1U 3EJ: before 2020W1U 3EL: before 2020W1U 3EN: before 2020W1U 3ES: before 2020W1U 3ET: before 2020W1U 3EU: before 2020W1U 3EX: before 2020W1U 3EY: before 2020W1U 3HA: before 2020W1U 3HB: before 2020W1U 3HD: before 2020W1U 3HE: before 2020W1U 3HF: before 2020W1U 3HJ: before 2020W1U 3HN: before 2020W1U 3HP: before 2020W1U 3HR: before 2020W1U 3HX: before 2020W1U 3HZ: before 2020W1U 3JA: before 2020W1U 3JD: before 2020W1U 3JP: before 2020W1U 3JR: before 2020W1U 3JU: before 2020W1U 3JY: before 2020W1U 3LR: before 2020W1U 3NL: before 2020W1U 3PA: before 2020W1U 3PB: before 2020W1U 3PD: before 2020W1U 3PF: before 2020W1U 3PL: before 2020W1U 3PP: before 2020W1U 3PT: before 2020W1U 3PW: before 2020W1U 3PY: before 2020W1U 3QA: before 2020W1U 3QB: before 2020W1U 3QD: before 2020W1U 3QE: before 2020W1U 3QF: before 2020W1U 3QH: before 2020W1U 3QJ: before 2020W1U 3QL: before 2020W1U 3QN: before 2020W1U 3QP: before 2020W1U 3QU: before 2020W1U 3QW: before 2020W1U 3QY: before 2020W1U 3QZ: before 2020W1U 3RB: before 2020W1U 3RD: before 2020W1U 3RF: before 2020W1U 3RT: before 2020W1U 3RW: before 2020W1U 3RX: before 2020W1U 3RY: before 2020W1U 3RZ: before 2020W1U 3SB: before 2020W1U 3SD: before 2020W1U 3DH: new since 2020W1U 3JN: new since 2020 City of Westminster Map of every postcode in the W1U 3 sector, by new since 2020 Of the 135 postcodes in the W1U 3 sector that ONS places, 2 are new since 2020 and 133 were in use before 2020. 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
  • New since 2020: 2
  • In use before 2020: 133

Of the 135 postcodes in the W1U 3 sector that ONS places, 2 are new since 2020 and 133 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

The 2 newest postcodes

W1U 3DHJanuary 2024W1U 3JNOctober 2023

What do homes sell for in W1U 3?

HM Land Registry records no standard sales of homes in W1U 3 in the 12 months to September 2026.

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 October 2026.

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: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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