SG4 0 postcode sector in the SG4 district

SG4 0 is a sector of the SG4 district: every postcode that starts SG4 0. It has 184 postcodes in use, 9 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 SG4 0 sector, by flood risk

Map of every postcode in the SG4 0 sector, by flood risk Of the 184 postcodes in the SG4 0 sector that ONS places, 8 have a home or business at high risk, 9 are at medium risk at worst, 15 are at low risk at worst and 152 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Hitchin. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A505 SG4 0AB: not on the flood risk listSG4 0AE: not on the flood risk listSG4 0AG: not on the flood risk listSG4 0AH: not on the flood risk listSG4 0AJ: not on the flood risk listSG4 0AL: not on the flood risk listSG4 0AN: not on the flood risk listSG4 0AP: not on the flood risk listSG4 0AQ: not on the flood risk listSG4 0BD: not on the flood risk listSG4 0BE: not on the flood risk listSG4 0BH: not on the flood risk listSG4 0BL: not on the flood risk listSG4 0BN: not on the flood risk listSG4 0BP: not on the flood risk listSG4 0BQ: not on the flood risk listSG4 0BW: not on the flood risk listSG4 0DH: not on the flood risk listSG4 0DL: not on the flood risk listSG4 0DN: not on the flood risk listSG4 0DP: not on the flood risk listSG4 0DR: not on the flood risk listSG4 0DS: not on the flood risk listSG4 0DW: not on the flood risk listSG4 0EA: not on the flood risk listSG4 0EB: not on the flood risk listSG4 0ED: not on the flood risk listSG4 0EH: not on the flood risk listSG4 0EJ: not on the flood risk listSG4 0EL: not on the flood risk listSG4 0EP: not on the flood risk listSG4 0ER: not on the flood risk listSG4 0ES: not on the flood risk listSG4 0ET: not on the flood risk listSG4 0EU: not on the flood risk listSG4 0EX: not on the flood risk listSG4 0EZ: not on the flood risk listSG4 0FP: not on the flood risk listSG4 0FR: not on the flood risk listSG4 0FS: not on the flood risk listSG4 0HB: not on the flood risk listSG4 0HL: not on the flood risk listSG4 0HR: not on the flood risk listSG4 0HS: not on the flood risk listSG4 0JB: not on the flood risk listSG4 0JD: not on the flood risk listSG4 0JE: not on the flood risk listSG4 0JG: not on the flood risk listSG4 0JL: not on the flood risk listSG4 0JN: not on the flood risk listSG4 0JP: not on the flood risk listSG4 0JR: not on the flood risk listSG4 0JS: not on the flood risk listSG4 0JT: not on the flood risk listSG4 0JU: not on the flood risk listSG4 0JW: not on the flood risk listSG4 0LA: not on the flood risk listSG4 0LB: not on the flood risk listSG4 0LD: not on the flood risk listSG4 0LE: not on the flood risk listSG4 0LF: not on the flood risk listSG4 0LG: not on the flood risk listSG4 0LJ: not on the flood risk listSG4 0LL: not on the flood risk listSG4 0LN: not on the flood risk listSG4 0LP: not on the flood risk listSG4 0LQ: not on the flood risk listSG4 0LR: not on the flood risk listSG4 0LS: not on the flood risk listSG4 0LT: not on the flood risk listSG4 0LU: not on the flood risk listSG4 0LW: not on the flood risk listSG4 0LX: not on the flood risk listSG4 0LZ: not on the flood risk listSG4 0NE: not on the flood risk listSG4 0NH: not on the flood risk listSG4 0NJ: not on the flood risk listSG4 0NL: not on the flood risk listSG4 0NN: not on the flood risk listSG4 0NP: not on the flood risk listSG4 0NQ: not on the flood risk listSG4 0NR: not on the flood risk listSG4 0NS: not on the flood risk listSG4 0NT: not on the flood risk listSG4 0NU: not on the flood risk listSG4 0NW: not on the flood risk listSG4 0NX: not on the flood risk listSG4 0NY: not on the flood risk listSG4 0NZ: not on the flood risk listSG4 0PA: not on the flood risk listSG4 0PB: not on the flood risk listSG4 0PD: not on the flood risk listSG4 0PF: not on the flood risk listSG4 0PG: not on the flood risk listSG4 0PH: not on the flood risk listSG4 0PJ: not on the flood risk listSG4 0PL: not on the flood risk listSG4 0PN: not on the flood risk listSG4 0PP: not on the flood risk listSG4 0PQ: not on the flood risk listSG4 0PR: not on the flood risk listSG4 0PS: not on the flood risk listSG4 0PT: not on the flood risk listSG4 0PU: not on the flood risk listSG4 0PW: not on the flood risk listSG4 0PZ: not on the flood risk listSG4 0QA: not on the flood risk listSG4 0QB: not on the flood risk listSG4 0QD: not on the flood risk listSG4 0QE: not on the flood risk listSG4 0QF: not on the flood risk listSG4 0QG: not on the flood risk listSG4 0QH: not on the flood risk listSG4 0QJ: not on the flood risk listSG4 0QL: not on the flood risk listSG4 0QN: not on the flood risk listSG4 0QP: not on the flood risk listSG4 0QQ: not on the flood risk listSG4 0QR: not on the flood risk listSG4 0QS: not on the flood risk listSG4 0QT: not on the flood risk listSG4 0QU: not on the flood risk listSG4 0QW: not on the flood risk listSG4 0QX: not on the flood risk listSG4 0QY: not on the flood risk listSG4 0QZ: not on the flood risk listSG4 0RA: not on the flood risk listSG4 0RB: not on the flood risk listSG4 0RD: not on the flood risk listSG4 0RE: not on the flood risk listSG4 0RG: not on the flood risk listSG4 0RH: not on the flood risk listSG4 0RJ: not on the flood risk listSG4 0RQ: not on the flood risk listSG4 0RS: not on the flood risk listSG4 0RY: not on the flood risk listSG4 0SA: not on the flood risk listSG4 0SB: not on the flood risk listSG4 0SE: not on the flood risk listSG4 0SL: not on the flood risk listSG4 0SQ: not on the flood risk listSG4 0TJ: not on the flood risk listSG4 0TP: not on the flood risk listSG4 0TS: not on the flood risk listSG4 0TW: not on the flood risk listSG4 0TY: not on the flood risk listSG4 0TZ: not on the flood risk listSG4 0UB: not on the flood risk listSG4 0UD: not on the flood risk listSG4 0UZ: not on the flood risk listSG4 0AX: low flood risk at worstSG4 0AZ: low flood risk at worstSG4 0BA: low flood risk at worstSG4 0BF: low flood risk at worstSG4 0BG: low flood risk at worstSG4 0BJ: low flood risk at worstSG4 0BS: low flood risk at worstSG4 0DA: low flood risk at worstSG4 0DU: low flood risk at worstSG4 0HN: low flood risk at worstSG4 0HP: low flood risk at worstSG4 0HW: low flood risk at worstSG4 0HX: low flood risk at worstSG4 0HY: low flood risk at worstSG4 0PE: low flood risk at worstSG4 0AS: medium flood risk at worstSG4 0AU: medium flood risk at worstSG4 0BT: medium flood risk at worstSG4 0BX: medium flood risk at worstSG4 0BZ: medium flood risk at worstSG4 0JH: medium flood risk at worstSG4 0NG: medium flood risk at worstSG4 0PY: medium flood risk at worstSG4 0RF: medium flood risk at worstSG4 0AA: high flood riskSG4 0AF: high flood riskSG4 0AT: high flood riskSG4 0AW: high flood riskSG4 0BU: high flood riskSG4 0DB: high flood riskSG4 0NF: high flood riskSG4 0PX: high flood risk Hitchin 9 postcodes at high or medium risk, outlined: this goes to SG4 0AT, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in the SG4 0 sector, by flood risk Of the 184 postcodes in the SG4 0 sector that ONS places, 8 have a home or business at high risk, 9 are at medium risk at worst, 15 are at low risk at worst and 152 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Hitchin Walsworth, Hitchin Bearton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Hitchin WalsworthHitchin Bearton
  • A home or business at high risk: 8
  • At medium risk at worst: 9
  • At low risk at worst: 15
  • At very low risk only: 0
  • Not on the at-risk list: 152
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 184 postcodes in the SG4 0 sector that ONS places, 8 have a home or business at high risk, 9 are at medium risk at worst, 15 are at low risk at worst and 152 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 170 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. Names in italics are council wards: we hold no town or village names here.

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

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

SG4 0AT18 at high riskSG4 0AW11 at high riskSG4 0BU8 at high riskSG4 0NF6 at high riskSG4 0AA3 at high riskSG4 0AF1 at high riskSG4 0DB1 at high riskSG4 0PX1 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

SG4 0WW

Where the postcodes at high or medium risk lie together

  • 9 postcodes at high or medium risk, outlined on the map. SG4 0AT, is the one with most homes and businesses at high risk.

What do homes sell for in SG4 0?

Homes in SG4 0 sold for a typical £398,500 in the 12 months to August 2026, across 118 sales, down 9.6% on the 12 months before, HM Land Registry's figures show.

£398,500 typical price, the 12 months to August 2026
£441,000 12 months to August 2025
▼ down 9.6% on the 12 months before
  • Detached £650,000 11 sales
  • Semi-detached £522,500 38 sales
  • Terraced £390,000 32 sales
  • Flat or maisonette £220,000 37 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 SG4 0. 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 SG4 0

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.

SG4 0AASG4 0ABSG4 0AESG4 0AFSG4 0AGSG4 0AHSG4 0AJSG4 0ALSG4 0ANSG4 0APSG4 0AQSG4 0ASSG4 0ATSG4 0AUSG4 0AWSG4 0AXSG4 0AZSG4 0BASG4 0BDSG4 0BESG4 0BFSG4 0BGSG4 0BHSG4 0BJSG4 0BLSG4 0BNSG4 0BPSG4 0BQSG4 0BSSG4 0BTSG4 0BUSG4 0BWSG4 0BXSG4 0BZSG4 0DASG4 0DBSG4 0DHSG4 0DLSG4 0DNSG4 0DPSG4 0DRSG4 0DSSG4 0DUSG4 0DWSG4 0EASG4 0EBSG4 0EDSG4 0EHSG4 0EJSG4 0ELSG4 0EPSG4 0ERSG4 0ESSG4 0ETSG4 0EUSG4 0EXSG4 0EZSG4 0FPSG4 0FRSG4 0FSSG4 0HBSG4 0HLSG4 0HNSG4 0HPSG4 0HRSG4 0HSSG4 0HWSG4 0HXSG4 0HYSG4 0JBSG4 0JDSG4 0JESG4 0JGSG4 0JHSG4 0JLSG4 0JNSG4 0JPSG4 0JRSG4 0JSSG4 0JTSG4 0JUSG4 0JWSG4 0JXSG4 0LASG4 0LBSG4 0LDSG4 0LESG4 0LFSG4 0LGSG4 0LJSG4 0LLSG4 0LNSG4 0LPSG4 0LQSG4 0LRSG4 0LSSG4 0LTSG4 0LUSG4 0LWSG4 0LXSG4 0LZSG4 0NESG4 0NFSG4 0NGSG4 0NHSG4 0NJSG4 0NLSG4 0NNSG4 0NPSG4 0NQSG4 0NRSG4 0NSSG4 0NTSG4 0NUSG4 0NWSG4 0NXSG4 0NYSG4 0NZSG4 0PASG4 0PBSG4 0PDSG4 0PESG4 0PFSG4 0PGSG4 0PHSG4 0PJSG4 0PLSG4 0PNSG4 0PPSG4 0PQSG4 0PRSG4 0PSSG4 0PTSG4 0PUSG4 0PWSG4 0PXSG4 0PYSG4 0PZSG4 0QASG4 0QBSG4 0QDSG4 0QESG4 0QFSG4 0QGSG4 0QHSG4 0QJSG4 0QLSG4 0QNSG4 0QPSG4 0QQSG4 0QRSG4 0QSSG4 0QTSG4 0QUSG4 0QWSG4 0QXSG4 0QYSG4 0QZSG4 0RASG4 0RBSG4 0RDSG4 0RESG4 0RFSG4 0RGSG4 0RHSG4 0RJSG4 0RQSG4 0RSSG4 0RYSG4 0SASG4 0SBSG4 0SESG4 0SLSG4 0SQSG4 0TJSG4 0TPSG4 0TSSG4 0TWSG4 0TYSG4 0TZSG4 0UBSG4 0UDSG4 0UZSG4 0WW

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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