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, by flood risk

Map of every postcode in the WD17 3 sector, by flood risk Of the 109 postcodes in the WD17 3 sector that ONS places, 2 have a home or business at high risk, 2 are at low risk at worst and 105 are not on the Environment Agency's at-risk list. Places named: Watford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A411M25 WD17 3AA: not on the flood risk listWD17 3AB: not on the flood risk listWD17 3AD: not on the flood risk listWD17 3AE: not on the flood risk listWD17 3AF: not on the flood risk listWD17 3AG: not on the flood risk listWD17 3AH: not on the flood risk listWD17 3AJ: not on the flood risk listWD17 3AL: not on the flood risk listWD17 3AN: not on the flood risk listWD17 3AP: not on the flood risk listWD17 3AQ: not on the flood risk listWD17 3AS: not on the flood risk listWD17 3AT: not on the flood risk listWD17 3AU: not on the flood risk listWD17 3AW: not on the flood risk listWD17 3AX: not on the flood risk listWD17 3AY: not on the flood risk listWD17 3AZ: not on the flood risk listWD17 3BA: not on the flood risk listWD17 3BB: not on the flood risk listWD17 3BD: not on the flood risk listWD17 3BE: not on the flood risk listWD17 3BF: not on the flood risk listWD17 3BG: not on the flood risk listWD17 3BH: not on the flood risk listWD17 3BJ: not on the flood risk listWD17 3BL: not on the flood risk listWD17 3BN: not on the flood risk listWD17 3BP: not on the flood risk listWD17 3BQ: not on the flood risk listWD17 3BT: not on the flood risk listWD17 3BU: not on the flood risk listWD17 3BW: not on the flood risk listWD17 3BX: not on the flood risk listWD17 3BY: not on the flood risk listWD17 3BZ: not on the flood risk listWD17 3DA: not on the flood risk listWD17 3DB: not on the flood risk listWD17 3DD: not on the flood risk listWD17 3DE: not on the flood risk listWD17 3DF: not on the flood risk listWD17 3DG: not on the flood risk listWD17 3DH: not on the flood risk listWD17 3DJ: not on the flood risk listWD17 3DL: not on the flood risk listWD17 3DN: not on the flood risk listWD17 3DP: not on the flood risk listWD17 3DQ: not on the flood risk listWD17 3DR: not on the flood risk listWD17 3DS: not on the flood risk listWD17 3DT: not on the flood risk listWD17 3DU: not on the flood risk listWD17 3DW: not on the flood risk listWD17 3DX: not on the flood risk listWD17 3DY: not on the flood risk listWD17 3EA: not on the flood risk listWD17 3EB: not on the flood risk listWD17 3ED: not on the flood risk listWD17 3EE: not on the flood risk listWD17 3EF: not on the flood risk listWD17 3EG: not on the flood risk listWD17 3EH: not on the flood risk listWD17 3EJ: not on the flood risk listWD17 3EL: not on the flood risk listWD17 3EQ: not on the flood risk listWD17 3EU: not on the flood risk listWD17 3EW: not on the flood risk listWD17 3EX: not on the flood risk listWD17 3EY: not on the flood risk listWD17 3EZ: not on the flood risk listWD17 3FA: not on the flood risk listWD17 3FB: not on the flood risk listWD17 3HA: not on the flood risk listWD17 3HD: not on the flood risk listWD17 3HE: not on the flood risk listWD17 3HF: not on the flood risk listWD17 3HG: not on the flood risk listWD17 3HH: not on the flood risk listWD17 3HJ: not on the flood risk listWD17 3HL: not on the flood risk listWD17 3HW: not on the flood risk listWD17 3JL: not on the flood risk listWD17 3LA: not on the flood risk listWD17 3LB: not on the flood risk listWD17 3LD: not on the flood risk listWD17 3LN: not on the flood risk listWD17 3NB: not on the flood risk listWD17 3NN: not on the flood risk listWD17 3NU: not on the flood risk listWD17 3PA: not on the flood risk listWD17 3PB: not on the flood risk listWD17 3PD: not on the flood risk listWD17 3PE: not on the flood risk listWD17 3PH: not on the flood risk listWD17 3RL: not on the flood risk listWD17 3TT: not on the flood risk listWD17 3TX: not on the flood risk listWD17 3TY: not on the flood risk listWD17 3XE: not on the flood risk listWD17 3AR: low flood risk at worstWD17 3HN: low flood risk at worstWD17 3NL: high flood riskWD17 3TU: high flood risk Watford Map of every postcode in the WD17 3 sector, by flood risk Of the 109 postcodes in the WD17 3 sector that ONS places, 2 have a home or business at high risk, 2 are at low risk at worst and 105 are not on the Environment Agency's at-risk list. Places named: Watford. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4145A412 Watford
  • A home or business at high risk: 2
  • At medium risk at worst: 0
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 105

Of the 109 postcodes in the WD17 3 sector that ONS places, 2 have a home or business at high risk, 2 are at low risk at worst and 105 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.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Environment Agency flood risk, published 6 July 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 postcodes at high risk

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

WD17 3TU4 at high riskWD17 3NL3 at high risk

What do homes sell for in WD17 3?

Homes in WD17 3 sold for a typical £976,750 in the 12 months to September 2026, across 27 sales, HM Land Registry's figures show. The 12 months before gave £947,500 from 53 sales. With fewer than 30 sales a year, a change can come from which homes happened to sell, so we do not give one.

£976,750 typical price, the 12 months to September 2026
£947,500 12 months to September 2025
  • Detached £1,125,000 17 sales
  • Semi-detached £890,000 8 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 October 2026.

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: 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 public sector information licensed under the Open Government Licence v3.0. 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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