SG1 1 postcode sector in the SG1 district

SG1 1 is a sector of the SG1 district: every postcode that starts SG1 1. It has 222 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 SG1 1 sector, by flood risk

Map of every postcode in the SG1 1 sector, by flood risk Of the 222 postcodes in the SG1 1 sector that ONS places, 2 are at medium risk at worst, 15 are at low risk at worst and 205 are not on the Environment Agency's at-risk list. Places named: Stevenage. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A602A1(M)A1072 SG1 1AB: not on the flood risk listSG1 1AF: not on the flood risk listSG1 1AP: not on the flood risk listSG1 1AS: not on the flood risk listSG1 1AT: not on the flood risk listSG1 1AU: not on the flood risk listSG1 1AY: not on the flood risk listSG1 1BF: not on the flood risk listSG1 1BL: not on the flood risk listSG1 1BP: not on the flood risk listSG1 1BS: not on the flood risk listSG1 1BX: not on the flood risk listSG1 1BY: not on the flood risk listSG1 1DA: not on the flood risk listSG1 1DB: not on the flood risk listSG1 1DD: not on the flood risk listSG1 1DG: not on the flood risk listSG1 1DH: not on the flood risk listSG1 1DN: not on the flood risk listSG1 1DP: not on the flood risk listSG1 1DW: not on the flood risk listSG1 1EA: not on the flood risk listSG1 1EE: not on the flood risk listSG1 1EG: not on the flood risk listSG1 1EH: not on the flood risk listSG1 1EJ: not on the flood risk listSG1 1EL: not on the flood risk listSG1 1EN: not on the flood risk listSG1 1EP: not on the flood risk listSG1 1ER: not on the flood risk listSG1 1ES: not on the flood risk listSG1 1EW: not on the flood risk listSG1 1EZ: not on the flood risk listSG1 1FN: not on the flood risk listSG1 1FR: not on the flood risk listSG1 1FX: not on the flood risk listSG1 1FZ: not on the flood risk listSG1 1GA: not on the flood risk listSG1 1HB: not on the flood risk listSG1 1HD: not on the flood risk listSG1 1HF: not on the flood risk listSG1 1HH: not on the flood risk listSG1 1HX: not on the flood risk listSG1 1HY: not on the flood risk listSG1 1JA: not on the flood risk listSG1 1JB: not on the flood risk listSG1 1JD: not on the flood risk listSG1 1JE: not on the flood risk listSG1 1JG: not on the flood risk listSG1 1JH: not on the flood risk listSG1 1JJ: not on the flood risk listSG1 1JL: not on the flood risk listSG1 1JN: not on the flood risk listSG1 1JS: not on the flood risk listSG1 1JU: not on the flood risk listSG1 1JX: not on the flood risk listSG1 1JY: not on the flood risk listSG1 1JZ: not on the flood risk listSG1 1LD: not on the flood risk listSG1 1LJ: not on the flood risk listSG1 1LL: not on the flood risk listSG1 1LN: not on the flood risk listSG1 1LP: not on the flood risk listSG1 1LQ: not on the flood risk listSG1 1LR: not on the flood risk listSG1 1LS: not on the flood risk listSG1 1LT: not on the flood risk listSG1 1LU: not on the flood risk listSG1 1LW: not on the flood risk listSG1 1LX: not on the flood risk listSG1 1LY: not on the flood risk listSG1 1LZ: not on the flood risk listSG1 1NA: not on the flood risk listSG1 1NB: not on the flood risk listSG1 1ND: not on the flood risk listSG1 1NE: not on the flood risk listSG1 1NG: not on the flood risk listSG1 1NH: not on the flood risk listSG1 1NJ: not on the flood risk listSG1 1NL: not on the flood risk listSG1 1NN: not on the flood risk listSG1 1NP: not on the flood risk listSG1 1NR: not on the flood risk listSG1 1NS: not on the flood risk listSG1 1NT: not on the flood risk listSG1 1NU: not on the flood risk listSG1 1PE: not on the flood risk listSG1 1PF: not on the flood risk listSG1 1PG: not on the flood risk listSG1 1PH: not on the flood risk listSG1 1PJ: not on the flood risk listSG1 1PL: not on the flood risk listSG1 1PN: not on the flood risk listSG1 1PP: not on the flood risk listSG1 1PQ: not on the flood risk listSG1 1PR: not on the flood risk listSG1 1PS: not on the flood risk listSG1 1PT: not on the flood risk listSG1 1PU: not on the flood risk listSG1 1PW: not on the flood risk listSG1 1PX: not on the flood risk listSG1 1PY: not on the flood risk listSG1 1PZ: not on the flood risk listSG1 1QA: not on the flood risk listSG1 1QB: not on the flood risk listSG1 1QD: not on the flood risk listSG1 1QE: not on the flood risk listSG1 1QG: not on the flood risk listSG1 1QQ: not on the flood risk listSG1 1QR: not on the flood risk listSG1 1QS: not on the flood risk listSG1 1QT: not on the flood risk listSG1 1QU: not on the flood risk listSG1 1QX: not on the flood risk listSG1 1QY: not on the flood risk listSG1 1QZ: not on the flood risk listSG1 1RA: not on the flood risk listSG1 1RB: not on the flood risk listSG1 1RD: not on the flood risk listSG1 1RE: not on the flood risk listSG1 1RF: not on the flood risk listSG1 1RG: not on the flood risk listSG1 1RH: not on the flood risk listSG1 1RJ: not on the flood risk listSG1 1RL: not on the flood risk listSG1 1RP: not on the flood risk listSG1 1RR: not on the flood risk listSG1 1RW: not on the flood risk listSG1 1SA: not on the flood risk listSG1 1SB: not on the flood risk listSG1 1SD: not on the flood risk listSG1 1SE: not on the flood risk listSG1 1SG: not on the flood risk listSG1 1SH: not on the flood risk listSG1 1SJ: not on the flood risk listSG1 1SL: not on the flood risk listSG1 1SN: not on the flood risk listSG1 1SP: not on the flood risk listSG1 1SQ: not on the flood risk listSG1 1SR: not on the flood risk listSG1 1SS: not on the flood risk listSG1 1ST: not on the flood risk listSG1 1SU: not on the flood risk listSG1 1SW: not on the flood risk listSG1 1SX: not on the flood risk listSG1 1SZ: not on the flood risk listSG1 1TA: not on the flood risk listSG1 1TB: not on the flood risk listSG1 1TD: not on the flood risk listSG1 1TE: not on the flood risk listSG1 1TF: not on the flood risk listSG1 1TG: not on the flood risk listSG1 1TL: not on the flood risk listSG1 1TR: not on the flood risk listSG1 1TT: not on the flood risk listSG1 1UA: not on the flood risk listSG1 1UB: not on the flood risk listSG1 1UD: not on the flood risk listSG1 1UE: not on the flood risk listSG1 1UG: not on the flood risk listSG1 1UH: not on the flood risk listSG1 1UJ: not on the flood risk listSG1 1UL: not on the flood risk listSG1 1UN: not on the flood risk listSG1 1UP: not on the flood risk listSG1 1UQ: not on the flood risk listSG1 1UR: not on the flood risk listSG1 1UT: not on the flood risk listSG1 1UU: not on the flood risk listSG1 1UW: not on the flood risk listSG1 1WR: not on the flood risk listSG1 1WT: not on the flood risk listSG1 1WW: not on the flood risk listSG1 1WX: not on the flood risk listSG1 1WZ: not on the flood risk listSG1 1XB: not on the flood risk listSG1 1XF: not on the flood risk listSG1 1XH: not on the flood risk listSG1 1XP: not on the flood risk listSG1 1XT: not on the flood risk listSG1 1XU: not on the flood risk listSG1 1XX: not on the flood risk listSG1 1XY: not on the flood risk listSG1 1XZ: not on the flood risk listSG1 1YJ: not on the flood risk listSG1 1YT: not on the flood risk listSG1 1ZB: not on the flood risk listSG1 1AA: low flood risk at worstSG1 1AR: low flood risk at worstSG1 1HE: low flood risk at worstSG1 1HS: low flood risk at worstSG1 1HT: low flood risk at worstSG1 1HZ: low flood risk at worstSG1 1TN: low flood risk at worstSG1 1TP: low flood risk at worstSG1 1TS: low flood risk at worstSG1 1TU: low flood risk at worstSG1 1TW: low flood risk at worstSG1 1TX: low flood risk at worstSG1 1TZ: low flood risk at worstSG1 1XR: low flood risk at worstSG1 1XW: low flood risk at worstSG1 1LA: medium flood risk at worstSG1 1XN: medium flood risk at worst Stevenage Map of every postcode in the SG1 1 sector, by flood risk Of the 222 postcodes in the SG1 1 sector that ONS places, 2 are at medium risk at worst, 15 are at low risk at worst and 205 are not on the Environment Agency's at-risk list. Places named: Stevenage. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A602A1(M) Stevenage
  • A home or business at high risk: 0
  • At medium risk at worst: 2
  • At low risk at worst: 15
  • At very low risk only: 0
  • Not on the at-risk list: 205

Of the 222 postcodes in the SG1 1 sector that ONS places, 2 are at medium risk at worst, 15 are at low risk at worst and 205 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.

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 medium risk at worst

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

SG1 1LA1 at medium riskSG1 1XN1 at medium risk

What do homes sell for in SG1 1?

Homes in SG1 1 sold for a typical £307,500 in the 12 months to August 2026, across 52 sales, up 9.8% on the 12 months before, HM Land Registry's figures show.

£307,500 typical price, the 12 months to August 2026
£280,000 12 months to August 2025
▲ up 9.8% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached 3 sales, too few to price
  • Terraced £323,000 36 sales
  • Flat or maisonette £173,750 12 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 SG1 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 SG1 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.

SG1 1AASG1 1ABSG1 1AFSG1 1APSG1 1ARSG1 1ASSG1 1ATSG1 1AUSG1 1AWSG1 1AXSG1 1AYSG1 1AZSG1 1BFSG1 1BHSG1 1BLSG1 1BPSG1 1BSSG1 1BXSG1 1BYSG1 1DASG1 1DBSG1 1DDSG1 1DGSG1 1DHSG1 1DJSG1 1DNSG1 1DPSG1 1DWSG1 1EASG1 1EESG1 1EGSG1 1EHSG1 1EJSG1 1ELSG1 1ENSG1 1EPSG1 1ERSG1 1ESSG1 1EWSG1 1EZSG1 1FNSG1 1FRSG1 1FTSG1 1FUSG1 1FXSG1 1FZSG1 1GASG1 1GGSG1 1GHSG1 1GPSG1 1GRSG1 1GTSG1 1GUSG1 1HBSG1 1HDSG1 1HESG1 1HFSG1 1HHSG1 1HNSG1 1HSSG1 1HTSG1 1HXSG1 1HYSG1 1HZSG1 1JASG1 1JBSG1 1JDSG1 1JESG1 1JGSG1 1JHSG1 1JJSG1 1JLSG1 1JNSG1 1JSSG1 1JTSG1 1JUSG1 1JWSG1 1JXSG1 1JYSG1 1JZSG1 1LASG1 1LDSG1 1LFSG1 1LJSG1 1LLSG1 1LNSG1 1LPSG1 1LQSG1 1LRSG1 1LSSG1 1LTSG1 1LUSG1 1LWSG1 1LXSG1 1LYSG1 1LZSG1 1NASG1 1NBSG1 1NDSG1 1NESG1 1NGSG1 1NHSG1 1NJSG1 1NLSG1 1NNSG1 1NPSG1 1NRSG1 1NSSG1 1NTSG1 1NUSG1 1PESG1 1PFSG1 1PGSG1 1PHSG1 1PJSG1 1PLSG1 1PNSG1 1PPSG1 1PQSG1 1PRSG1 1PSSG1 1PTSG1 1PUSG1 1PWSG1 1PXSG1 1PYSG1 1PZSG1 1QASG1 1QBSG1 1QDSG1 1QESG1 1QGSG1 1QQSG1 1QRSG1 1QSSG1 1QTSG1 1QUSG1 1QXSG1 1QYSG1 1QZSG1 1RASG1 1RBSG1 1RDSG1 1RESG1 1RFSG1 1RGSG1 1RHSG1 1RJSG1 1RLSG1 1RPSG1 1RRSG1 1RWSG1 1SASG1 1SBSG1 1SDSG1 1SESG1 1SGSG1 1SHSG1 1SJSG1 1SLSG1 1SNSG1 1SPSG1 1SQSG1 1SRSG1 1SSSG1 1STSG1 1SUSG1 1SWSG1 1SXSG1 1SZSG1 1TASG1 1TBSG1 1TDSG1 1TESG1 1TFSG1 1TGSG1 1TLSG1 1TNSG1 1TPSG1 1TRSG1 1TSSG1 1TTSG1 1TUSG1 1TWSG1 1TXSG1 1TZSG1 1UASG1 1UBSG1 1UDSG1 1UESG1 1UGSG1 1UHSG1 1UJSG1 1ULSG1 1UNSG1 1UPSG1 1UQSG1 1URSG1 1UTSG1 1UUSG1 1UWSG1 1WRSG1 1WTSG1 1WWSG1 1WXSG1 1WZSG1 1XBSG1 1XFSG1 1XHSG1 1XNSG1 1XPSG1 1XRSG1 1XTSG1 1XUSG1 1XWSG1 1XXSG1 1XYSG1 1XZSG1 1YJSG1 1YTSG1 1ZBSG1 1ZT

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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