WD3 1 postcode sector in the WD3 district

WD3 1 is a sector of the WD3 district: every postcode that starts WD3 1. It has 197 postcodes in use, 16 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 WD3 1 sector, by flood risk

Map of every postcode in the WD3 1 sector, by flood risk Of the 197 postcodes in the WD3 1 sector that ONS places, 46 have a home or business at high risk, 10 are at medium risk at worst, 20 are at low risk at worst, 5 are at very low risk only and 116 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 51 postcodes at high or medium risk. Places named: Rickmansworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4145 WD3 1AA: not on the flood risk listWD3 1AB: not on the flood risk listWD3 1AD: not on the flood risk listWD3 1AE: not on the flood risk listWD3 1AF: not on the flood risk listWD3 1AG: not on the flood risk listWD3 1AR: not on the flood risk listWD3 1AW: not on the flood risk listWD3 1AY: not on the flood risk listWD3 1BA: not on the flood risk listWD3 1BB: not on the flood risk listWD3 1BD: not on the flood risk listWD3 1BR: not on the flood risk listWD3 1BT: not on the flood risk listWD3 1BU: not on the flood risk listWD3 1EA: not on the flood risk listWD3 1EE: not on the flood risk listWD3 1EH: not on the flood risk listWD3 1EN: not on the flood risk listWD3 1EP: not on the flood risk listWD3 1ER: not on the flood risk listWD3 1ET: not on the flood risk listWD3 1EW: not on the flood risk listWD3 1FA: not on the flood risk listWD3 1FB: not on the flood risk listWD3 1FD: not on the flood risk listWD3 1FE: not on the flood risk listWD3 1FF: not on the flood risk listWD3 1FH: not on the flood risk listWD3 1FJ: not on the flood risk listWD3 1FL: not on the flood risk listWD3 1FQ: not on the flood risk listWD3 1FT: not on the flood risk listWD3 1FX: not on the flood risk listWD3 1FY: not on the flood risk listWD3 1GA: not on the flood risk listWD3 1GD: not on the flood risk listWD3 1GE: not on the flood risk listWD3 1GL: not on the flood risk listWD3 1GN: not on the flood risk listWD3 1GY: not on the flood risk listWD3 1HF: not on the flood risk listWD3 1HL: not on the flood risk listWD3 1HQ: not on the flood risk listWD3 1HX: not on the flood risk listWD3 1JD: not on the flood risk listWD3 1JH: not on the flood risk listWD3 1JL: not on the flood risk listWD3 1JN: not on the flood risk listWD3 1JP: not on the flood risk listWD3 1JR: not on the flood risk listWD3 1JS: not on the flood risk listWD3 1JT: not on the flood risk listWD3 1JU: not on the flood risk listWD3 1JX: not on the flood risk listWD3 1LD: not on the flood risk listWD3 1LG: not on the flood risk listWD3 1LJ: not on the flood risk listWD3 1LL: not on the flood risk listWD3 1LN: not on the flood risk listWD3 1LQ: not on the flood risk listWD3 1LW: not on the flood risk listWD3 1NJ: not on the flood risk listWD3 1NL: not on the flood risk listWD3 1NN: not on the flood risk listWD3 1NR: not on the flood risk listWD3 1NT: not on the flood risk listWD3 1NW: not on the flood risk listWD3 1NY: not on the flood risk listWD3 1PA: not on the flood risk listWD3 1PB: not on the flood risk listWD3 1PD: not on the flood risk listWD3 1PE: not on the flood risk listWD3 1PH: not on the flood risk listWD3 1PJ: not on the flood risk listWD3 1PP: not on the flood risk listWD3 1PQ: not on the flood risk listWD3 1PR: not on the flood risk listWD3 1PS: not on the flood risk listWD3 1PT: not on the flood risk listWD3 1PU: not on the flood risk listWD3 1PX: not on the flood risk listWD3 1PY: not on the flood risk listWD3 1PZ: not on the flood risk listWD3 1QA: not on the flood risk listWD3 1QB: not on the flood risk listWD3 1QD: not on the flood risk listWD3 1QF: not on the flood risk listWD3 1QG: not on the flood risk listWD3 1QH: not on the flood risk listWD3 1QJ: not on the flood risk listWD3 1QL: not on the flood risk listWD3 1QN: not on the flood risk listWD3 1QP: not on the flood risk listWD3 1QQ: not on the flood risk listWD3 1QW: not on the flood risk listWD3 1QY: not on the flood risk listWD3 1QZ: not on the flood risk listWD3 1RE: not on the flood risk listWD3 1RH: not on the flood risk listWD3 1RL: not on the flood risk listWD3 1RT: not on the flood risk listWD3 1SB: not on the flood risk listWD3 1SW: not on the flood risk listWD3 1TB: not on the flood risk listWD3 1AT: very low flood risk onlyWD3 1BE: very low flood risk onlyWD3 1BH: very low flood risk onlyWD3 1DX: very low flood risk onlyWD3 1EF: very low flood risk onlyWD3 1AN: low flood risk at worstWD3 1AZ: low flood risk at worstWD3 1BJ: low flood risk at worstWD3 1BL: low flood risk at worstWD3 1BN: low flood risk at worstWD3 1BQ: low flood risk at worstWD3 1BX: low flood risk at worstWD3 1DR: low flood risk at worstWD3 1DS: low flood risk at worstWD3 1EQ: low flood risk at worstWD3 1FU: low flood risk at worstWD3 1GH: low flood risk at worstWD3 1GR: low flood risk at worstWD3 1HH: low flood risk at worstWD3 1HJ: low flood risk at worstWD3 1HP: low flood risk at worstWD3 1HT: low flood risk at worstWD3 1HU: low flood risk at worstWD3 1HW: low flood risk at worstWD3 1JF: low flood risk at worstWD3 1BP: medium flood risk at worstWD3 1ED: medium flood risk at worstWD3 1EY: medium flood risk at worstWD3 1FS: medium flood risk at worstWD3 1HB: medium flood risk at worstWD3 1HG: medium flood risk at worstWD3 1JB: medium flood risk at worstWD3 1JQ: medium flood risk at worstWD3 1NH: medium flood risk at worstWD3 1NP: medium flood risk at worstWD3 1BS: high flood riskWD3 1DD: high flood riskWD3 1DE: high flood riskWD3 1DF: high flood riskWD3 1DJ: high flood riskWD3 1DN: high flood riskWD3 1DP: high flood riskWD3 1DQ: high flood riskWD3 1DT: high flood riskWD3 1DW: high flood riskWD3 1LB: high flood riskWD3 1FR: high flood riskWD3 1GF: high flood riskWD3 1GG: high flood riskWD3 1HA: high flood riskWD3 1HD: high flood riskWD3 1HE: high flood riskWD3 1JA: high flood riskWD3 1JE: high flood riskWD3 1JJ: high flood riskWD3 1JW: high flood riskWD3 1JY: high flood riskWD3 1LA: high flood riskWD3 1LE: high flood riskWD3 1LF: high flood riskWD3 1LP: high flood riskWD3 1LR: high flood riskWD3 1LU: high flood riskWD3 1LX: high flood riskWD3 1LY: high flood riskWD3 1LZ: high flood riskWD3 1NA: high flood riskWD3 1NB: high flood riskWD3 1ND: high flood riskWD3 1NE: high flood riskWD3 1NF: high flood riskWD3 1NG: high flood riskWD3 1NQ: high flood riskWD3 1NS: high flood riskWD3 1NU: high flood riskWD3 1NX: high flood riskWD3 1NZ: high flood riskWD3 1QE: high flood riskWD3 1SZ: high flood riskWD3 1TA: high flood risk Rickmansworth 51 postcodes at high or medium risk, outlined: this goes to WD3 1JY, the one with most homes and businesses at high risk51 postcodes at high or medium risk Map of every postcode in the WD3 1 sector, by flood risk Of the 197 postcodes in the WD3 1 sector that ONS places, 46 have a home or business at high risk, 10 are at medium risk at worst, 20 are at low risk at worst, 5 are at very low risk only and 116 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 51 postcodes at high or medium risk. Places named: Rickmansworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A412 Rickmansworth
  • A home or business at high risk: 46
  • At medium risk at worst: 10
  • At low risk at worst: 20
  • At very low risk only: 5
  • Not on the at-risk list: 116
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 197 postcodes in the WD3 1 sector that ONS places, 46 have a home or business at high risk, 10 are at medium risk at worst, 20 are at low risk at worst, 5 are at very low risk only and 116 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 150 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.

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

46 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

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

WD3 1JY43 at high riskWD3 1LA43 at high riskWD3 1GG27 at high riskWD3 1NF22 at high riskWD3 1HE20 at high riskWD3 1NS17 at high riskWD3 1HD16 at high riskWD3 1NE16 at high riskWD3 1TA13 at high riskWD3 1NA11 at high riskWD3 1NB10 at high riskWD3 1JA10 at high risk

Where the postcodes at high or medium risk lie together

  • 51 postcodes at high or medium risk, outlined on the map. WD3 1JY, is the one with most homes and businesses at high risk.

What do homes sell for in WD3 1?

Homes in WD3 1 sold for a typical £500,000 in the 12 months to August 2026, across 57 sales, down 4.8% on the 12 months before, HM Land Registry's figures show.

£500,000 typical price, the 12 months to August 2026
£525,000 12 months to August 2025
▼ down 4.8% on the 12 months before
  • Detached £930,000 9 sales
  • Semi-detached £700,000 11 sales
  • Terraced £536,000 12 sales
  • Flat or maisonette £330,000 25 sales

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 WD3 1. 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 WD3 1

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.

WD3 1AAWD3 1ABWD3 1ADWD3 1AEWD3 1AFWD3 1AGWD3 1AJWD3 1ANWD3 1AQWD3 1ARWD3 1ATWD3 1AWWD3 1AYWD3 1AZWD3 1BAWD3 1BBWD3 1BDWD3 1BEWD3 1BHWD3 1BJWD3 1BLWD3 1BNWD3 1BPWD3 1BQWD3 1BRWD3 1BSWD3 1BTWD3 1BUWD3 1BXWD3 1DDWD3 1DEWD3 1DFWD3 1DHWD3 1DJWD3 1DNWD3 1DPWD3 1DQWD3 1DRWD3 1DSWD3 1DTWD3 1DWWD3 1DXWD3 1EAWD3 1EDWD3 1EEWD3 1EFWD3 1EHWD3 1ENWD3 1EPWD3 1EQWD3 1ERWD3 1ETWD3 1EWWD3 1EYWD3 1FAWD3 1FBWD3 1FDWD3 1FEWD3 1FFWD3 1FGWD3 1FHWD3 1FJWD3 1FLWD3 1FNWD3 1FQWD3 1FRWD3 1FSWD3 1FTWD3 1FUWD3 1FXWD3 1FYWD3 1FZWD3 1GAWD3 1GBWD3 1GDWD3 1GEWD3 1GFWD3 1GGWD3 1GHWD3 1GJWD3 1GLWD3 1GNWD3 1GQWD3 1GRWD3 1GYWD3 1HAWD3 1HBWD3 1HDWD3 1HEWD3 1HFWD3 1HGWD3 1HHWD3 1HJWD3 1HLWD3 1HPWD3 1HQWD3 1HTWD3 1HUWD3 1HWWD3 1HXWD3 1JAWD3 1JBWD3 1JDWD3 1JEWD3 1JFWD3 1JHWD3 1JJWD3 1JLWD3 1JNWD3 1JPWD3 1JQWD3 1JRWD3 1JSWD3 1JTWD3 1JUWD3 1JWWD3 1JXWD3 1JYWD3 1LAWD3 1LBWD3 1LDWD3 1LEWD3 1LFWD3 1LGWD3 1LJWD3 1LLWD3 1LNWD3 1LPWD3 1LQWD3 1LRWD3 1LUWD3 1LWWD3 1LXWD3 1LYWD3 1LZWD3 1NAWD3 1NBWD3 1NDWD3 1NEWD3 1NFWD3 1NGWD3 1NHWD3 1NJWD3 1NLWD3 1NNWD3 1NPWD3 1NQWD3 1NRWD3 1NSWD3 1NTWD3 1NUWD3 1NWWD3 1NXWD3 1NYWD3 1NZWD3 1PAWD3 1PBWD3 1PDWD3 1PEWD3 1PHWD3 1PJWD3 1PPWD3 1PQWD3 1PRWD3 1PSWD3 1PTWD3 1PUWD3 1PXWD3 1PYWD3 1PZWD3 1QAWD3 1QBWD3 1QDWD3 1QEWD3 1QFWD3 1QGWD3 1QHWD3 1QJWD3 1QLWD3 1QNWD3 1QPWD3 1QQWD3 1QWWD3 1QYWD3 1QZWD3 1REWD3 1RHWD3 1RLWD3 1RTWD3 1SBWD3 1SWWD3 1SZWD3 1TAWD3 1TBWD3 1XRWD3 1ZRWD3 1ZS

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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