WD17 3 postcode sector in the WD17 district

WD17 3 is a sector of the WD17 district: every postcode that starts WD17 3. It has 109 postcodes in use, 13 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 WD17 3 sector, and which are new since 2020

Map of every postcode in the WD17 3 sector, by new since 2020 Of the 109 postcodes in the WD17 3 sector that ONS places, 1 are new since 2020 and 108 were in use before 2020. Places named: Watford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A411M25 WD17 3AA: before 2020WD17 3AB: before 2020WD17 3AD: before 2020WD17 3AE: before 2020WD17 3AF: before 2020WD17 3AG: before 2020WD17 3AH: before 2020WD17 3AJ: before 2020WD17 3AL: before 2020WD17 3AN: before 2020WD17 3AP: before 2020WD17 3AQ: before 2020WD17 3AR: before 2020WD17 3AS: before 2020WD17 3AT: before 2020WD17 3AU: before 2020WD17 3AW: before 2020WD17 3AX: before 2020WD17 3AY: before 2020WD17 3AZ: before 2020WD17 3BA: before 2020WD17 3BB: before 2020WD17 3BD: before 2020WD17 3BE: before 2020WD17 3BF: before 2020WD17 3BG: before 2020WD17 3BH: before 2020WD17 3BJ: before 2020WD17 3BL: before 2020WD17 3BN: before 2020WD17 3BP: before 2020WD17 3BQ: before 2020WD17 3BT: before 2020WD17 3BU: before 2020WD17 3BW: before 2020WD17 3BX: before 2020WD17 3BY: before 2020WD17 3BZ: before 2020WD17 3DA: before 2020WD17 3DB: before 2020WD17 3DD: before 2020WD17 3DE: before 2020WD17 3DF: before 2020WD17 3DG: before 2020WD17 3DH: before 2020WD17 3DJ: before 2020WD17 3DL: before 2020WD17 3DN: before 2020WD17 3DP: before 2020WD17 3DQ: before 2020WD17 3DR: before 2020WD17 3DS: before 2020WD17 3DT: before 2020WD17 3DU: before 2020WD17 3DW: before 2020WD17 3DX: before 2020WD17 3DY: before 2020WD17 3EA: before 2020WD17 3EB: before 2020WD17 3ED: before 2020WD17 3EE: before 2020WD17 3EF: before 2020WD17 3EG: before 2020WD17 3EH: before 2020WD17 3EJ: before 2020WD17 3EQ: before 2020WD17 3EU: before 2020WD17 3EW: before 2020WD17 3EX: before 2020WD17 3EY: before 2020WD17 3EZ: before 2020WD17 3FA: before 2020WD17 3FB: before 2020WD17 3HA: before 2020WD17 3HD: before 2020WD17 3HE: before 2020WD17 3HF: before 2020WD17 3HG: before 2020WD17 3HH: before 2020WD17 3HJ: before 2020WD17 3HL: before 2020WD17 3HN: before 2020WD17 3HW: before 2020WD17 3JL: before 2020WD17 3LA: before 2020WD17 3LB: before 2020WD17 3LD: before 2020WD17 3LN: before 2020WD17 3NB: before 2020WD17 3NL: before 2020WD17 3NN: before 2020WD17 3NU: before 2020WD17 3PA: before 2020WD17 3PB: before 2020WD17 3PD: before 2020WD17 3PE: before 2020WD17 3PH: before 2020WD17 3RL: before 2020WD17 3TT: before 2020WD17 3TU: before 2020WD17 3TX: before 2020WD17 3TY: before 2020WD17 3XE: before 2020WD17 3EL: new since 2020 Watford Map of every postcode in the WD17 3 sector, by new since 2020 Of the 109 postcodes in the WD17 3 sector that ONS places, 1 are new since 2020 and 108 were in use before 2020. Places named: Watford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4145A412 Watford
  • New since 2020: 1
  • In use before 2020: 108

Of the 109 postcodes in the WD17 3 sector that ONS places, 1 are new since 2020 and 108 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.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; 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 newest postcode

WD17 3ELApril 2026

What do homes sell for in WD17 3?

Homes in WD17 3 sold for a typical £976,750 in the 12 months to August 2026, across 31 sales, up 3.4% on the 12 months before, HM Land Registry's figures show.

£976,750 typical price, the 12 months to August 2026
£945,000 12 months to August 2025
▲ up 3.4% on the 12 months before
  • Detached £1,095,000 20 sales
  • Semi-detached £930,000 9 sales
  • Flat or maisonette 2 sales, too few to price

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value at the postcodes that start WD17 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 WD17 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.

WD17 3AAWD17 3ABWD17 3ADWD17 3AEWD17 3AFWD17 3AGWD17 3AHWD17 3AJWD17 3ALWD17 3ANWD17 3APWD17 3AQWD17 3ARWD17 3ASWD17 3ATWD17 3AUWD17 3AWWD17 3AXWD17 3AYWD17 3AZWD17 3BAWD17 3BBWD17 3BDWD17 3BEWD17 3BFWD17 3BGWD17 3BHWD17 3BJWD17 3BLWD17 3BNWD17 3BPWD17 3BQWD17 3BTWD17 3BUWD17 3BWWD17 3BXWD17 3BYWD17 3BZWD17 3DAWD17 3DBWD17 3DDWD17 3DEWD17 3DFWD17 3DGWD17 3DHWD17 3DJWD17 3DLWD17 3DNWD17 3DPWD17 3DQWD17 3DRWD17 3DSWD17 3DTWD17 3DUWD17 3DWWD17 3DXWD17 3DYWD17 3EAWD17 3EBWD17 3EDWD17 3EEWD17 3EFWD17 3EGWD17 3EHWD17 3EJWD17 3ELWD17 3EQWD17 3EUWD17 3EWWD17 3EXWD17 3EYWD17 3EZWD17 3FAWD17 3FBWD17 3HAWD17 3HBWD17 3HDWD17 3HEWD17 3HFWD17 3HGWD17 3HHWD17 3HJWD17 3HLWD17 3HNWD17 3HPWD17 3HWWD17 3JLWD17 3LAWD17 3LBWD17 3LDWD17 3LNWD17 3NBWD17 3NLWD17 3NNWD17 3NUWD17 3PAWD17 3PBWD17 3PDWD17 3PEWD17 3PHWD17 3RLWD17 3TTWD17 3TUWD17 3TXWD17 3TYWD17 3WAWD17 3XEWD17 3XJWD17 3ZU

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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