AL7 3 postcode sector in the AL7 district

AL7 3 is a sector of the AL7 district: every postcode that starts AL7 3. It has 236 postcodes in use, 3 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 AL7 3 sector, by flood risk

Map of every postcode in the AL7 3 sector, by flood risk Of the 236 postcodes in the AL7 3 sector that ONS places, 236 are not on the Environment Agency's at-risk list. Places named: Welwyn Garden City. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. AL7 3AB: not on the flood risk listAL7 3AE: not on the flood risk listAL7 3AF: not on the flood risk listAL7 3AG: not on the flood risk listAL7 3AJ: not on the flood risk listAL7 3AX: not on the flood risk listAL7 3BA: not on the flood risk listAL7 3BB: not on the flood risk listAL7 3BE: not on the flood risk listAL7 3BH: not on the flood risk listAL7 3BL: not on the flood risk listAL7 3BN: not on the flood risk listAL7 3BQ: not on the flood risk listAL7 3BT: not on the flood risk listAL7 3BX: not on the flood risk listAL7 3BY: not on the flood risk listAL7 3BZ: not on the flood risk listAL7 3DA: not on the flood risk listAL7 3DB: not on the flood risk listAL7 3DD: not on the flood risk listAL7 3DE: not on the flood risk listAL7 3DF: not on the flood risk listAL7 3DG: not on the flood risk listAL7 3DJ: not on the flood risk listAL7 3DQ: not on the flood risk listAL7 3DU: not on the flood risk listAL7 3DX: not on the flood risk listAL7 3DY: not on the flood risk listAL7 3DZ: not on the flood risk listAL7 3EA: not on the flood risk listAL7 3EB: not on the flood risk listAL7 3EE: not on the flood risk listAL7 3EF: not on the flood risk listAL7 3EG: not on the flood risk listAL7 3EJ: not on the flood risk listAL7 3EL: not on the flood risk listAL7 3EN: not on the flood risk listAL7 3EP: not on the flood risk listAL7 3EQ: not on the flood risk listAL7 3ER: not on the flood risk listAL7 3ES: not on the flood risk listAL7 3ET: not on the flood risk listAL7 3EU: not on the flood risk listAL7 3EW: not on the flood risk listAL7 3EX: not on the flood risk listAL7 3EY: not on the flood risk listAL7 3EZ: not on the flood risk listAL7 3FA: not on the flood risk listAL7 3FB: not on the flood risk listAL7 3FD: not on the flood risk listAL7 3FE: not on the flood risk listAL7 3FH: not on the flood risk listAL7 3FL: not on the flood risk listAL7 3FQ: not on the flood risk listAL7 3GB: not on the flood risk listAL7 3HA: not on the flood risk listAL7 3HB: not on the flood risk listAL7 3HD: not on the flood risk listAL7 3HE: not on the flood risk listAL7 3HF: not on the flood risk listAL7 3HG: not on the flood risk listAL7 3HH: not on the flood risk listAL7 3HJ: not on the flood risk listAL7 3HL: not on the flood risk listAL7 3HN: not on the flood risk listAL7 3HQ: not on the flood risk listAL7 3HR: not on the flood risk listAL7 3HS: not on the flood risk listAL7 3HT: not on the flood risk listAL7 3HU: not on the flood risk listAL7 3HW: not on the flood risk listAL7 3HX: not on the flood risk listAL7 3HY: not on the flood risk listAL7 3HZ: not on the flood risk listAL7 3JA: not on the flood risk listAL7 3JD: not on the flood risk listAL7 3JE: not on the flood risk listAL7 3JF: not on the flood risk listAL7 3JG: not on the flood risk listAL7 3JH: not on the flood risk listAL7 3JJ: not on the flood risk listAL7 3JN: not on the flood risk listAL7 3JP: not on the flood risk listAL7 3JQ: not on the flood risk listAL7 3JR: not on the flood risk listAL7 3JS: not on the flood risk listAL7 3JT: not on the flood risk listAL7 3JU: not on the flood risk listAL7 3JW: not on the flood risk listAL7 3JX: not on the flood risk listAL7 3JY: not on the flood risk listAL7 3JZ: not on the flood risk listAL7 3LA: not on the flood risk listAL7 3LB: not on the flood risk listAL7 3LD: not on the flood risk listAL7 3LE: not on the flood risk listAL7 3LF: not on the flood risk listAL7 3LG: not on the flood risk listAL7 3LH: not on the flood risk listAL7 3LJ: not on the flood risk listAL7 3LL: not on the flood risk listAL7 3LN: not on the flood risk listAL7 3LP: not on the flood risk listAL7 3LQ: not on the flood risk listAL7 3LR: not on the flood risk listAL7 3LS: not on the flood risk listAL7 3LT: not on the flood risk listAL7 3LW: not on the flood risk listAL7 3LX: not on the flood risk listAL7 3LY: not on the flood risk listAL7 3LZ: not on the flood risk listAL7 3NA: not on the flood risk listAL7 3NB: not on the flood risk listAL7 3ND: not on the flood risk listAL7 3NE: not on the flood risk listAL7 3NF: not on the flood risk listAL7 3NG: not on the flood risk listAL7 3NH: not on the flood risk listAL7 3NJ: not on the flood risk listAL7 3NL: not on the flood risk listAL7 3NN: not on the flood risk listAL7 3NP: not on the flood risk listAL7 3NQ: not on the flood risk listAL7 3NR: not on the flood risk listAL7 3NS: not on the flood risk listAL7 3NT: not on the flood risk listAL7 3NU: not on the flood risk listAL7 3NW: not on the flood risk listAL7 3NX: not on the flood risk listAL7 3NY: not on the flood risk listAL7 3NZ: not on the flood risk listAL7 3PA: not on the flood risk listAL7 3PB: not on the flood risk listAL7 3PD: not on the flood risk listAL7 3PG: not on the flood risk listAL7 3PH: not on the flood risk listAL7 3PJ: not on the flood risk listAL7 3PL: not on the flood risk listAL7 3PN: not on the flood risk listAL7 3PP: not on the flood risk listAL7 3PU: not on the flood risk listAL7 3PW: not on the flood risk listAL7 3PY: not on the flood risk listAL7 3PZ: not on the flood risk listAL7 3QA: not on the flood risk listAL7 3QB: not on the flood risk listAL7 3QD: not on the flood risk listAL7 3QE: not on the flood risk listAL7 3QF: not on the flood risk listAL7 3QG: not on the flood risk listAL7 3QH: not on the flood risk listAL7 3QJ: not on the flood risk listAL7 3QL: not on the flood risk listAL7 3QP: not on the flood risk listAL7 3QQ: not on the flood risk listAL7 3QR: not on the flood risk listAL7 3QS: not on the flood risk listAL7 3QT: not on the flood risk listAL7 3QW: not on the flood risk listAL7 3QZ: not on the flood risk listAL7 3RA: not on the flood risk listAL7 3RB: not on the flood risk listAL7 3RD: not on the flood risk listAL7 3RE: not on the flood risk listAL7 3RF: not on the flood risk listAL7 3RG: not on the flood risk listAL7 3RH: not on the flood risk listAL7 3RJ: not on the flood risk listAL7 3RL: not on the flood risk listAL7 3RN: not on the flood risk listAL7 3RP: not on the flood risk listAL7 3RQ: not on the flood risk listAL7 3RR: not on the flood risk listAL7 3RS: not on the flood risk listAL7 3RT: not on the flood risk listAL7 3RU: not on the flood risk listAL7 3RW: not on the flood risk listAL7 3RX: not on the flood risk listAL7 3RY: not on the flood risk listAL7 3RZ: not on the flood risk listAL7 3SA: not on the flood risk listAL7 3SB: not on the flood risk listAL7 3SD: not on the flood risk listAL7 3SF: not on the flood risk listAL7 3SH: not on the flood risk listAL7 3SJ: not on the flood risk listAL7 3SN: not on the flood risk listAL7 3SR: not on the flood risk listAL7 3ST: not on the flood risk listAL7 3SX: not on the flood risk listAL7 3SY: not on the flood risk listAL7 3TB: not on the flood risk listAL7 3TD: not on the flood risk listAL7 3TE: not on the flood risk listAL7 3TF: not on the flood risk listAL7 3TG: not on the flood risk listAL7 3TH: not on the flood risk listAL7 3TJ: not on the flood risk listAL7 3TL: not on the flood risk listAL7 3TN: not on the flood risk listAL7 3TP: not on the flood risk listAL7 3TQ: not on the flood risk listAL7 3TR: not on the flood risk listAL7 3TS: not on the flood risk listAL7 3TT: not on the flood risk listAL7 3TU: not on the flood risk listAL7 3TW: not on the flood risk listAL7 3UA: not on the flood risk listAL7 3UB: not on the flood risk listAL7 3UD: not on the flood risk listAL7 3UE: not on the flood risk listAL7 3UH: not on the flood risk listAL7 3UJ: not on the flood risk listAL7 3UL: not on the flood risk listAL7 3UN: not on the flood risk listAL7 3UP: not on the flood risk listAL7 3UQ: not on the flood risk listAL7 3UU: not on the flood risk listAL7 3UW: not on the flood risk listAL7 3UX: not on the flood risk listAL7 3UZ: not on the flood risk listAL7 3XA: not on the flood risk listAL7 3XB: not on the flood risk listAL7 3XD: not on the flood risk listAL7 3XE: not on the flood risk listAL7 3XF: not on the flood risk listAL7 3XG: not on the flood risk listAL7 3XH: not on the flood risk listAL7 3XJ: not on the flood risk listAL7 3XL: not on the flood risk listAL7 3XN: not on the flood risk listAL7 3XP: not on the flood risk listAL7 3XW: not on the flood risk list Welwyn Garden City Map of every postcode in the AL7 3 sector, by flood risk Of the 236 postcodes in the AL7 3 sector that ONS places, 236 are not on the Environment Agency's at-risk list. Places named: Welwyn Garden City. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Welwyn Garden City
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 236

Of the 236 postcodes in the AL7 3 sector that ONS places, 236 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

What do homes sell for in AL7 3?

Homes in AL7 3 sold for a typical £389,950 in the 12 months to August 2026, across 99 sales, up 1.9% on the 12 months before, HM Land Registry's figures show.

£389,950 typical price, the 12 months to August 2026
£382,500 12 months to August 2025
▲ up 1.9% on the 12 months before
  • Detached 4 sales, too few to price
  • Semi-detached £426,250 18 sales
  • Terraced £408,000 49 sales
  • Flat or maisonette £251,250 28 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 AL7 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 AL7 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.

AL7 3ABAL7 3AEAL7 3AFAL7 3AGAL7 3AJAL7 3AXAL7 3BAAL7 3BBAL7 3BEAL7 3BHAL7 3BLAL7 3BNAL7 3BQAL7 3BTAL7 3BXAL7 3BYAL7 3BZAL7 3DAAL7 3DBAL7 3DDAL7 3DEAL7 3DFAL7 3DGAL7 3DJAL7 3DQAL7 3DUAL7 3DXAL7 3DYAL7 3DZAL7 3EAAL7 3EBAL7 3EEAL7 3EFAL7 3EGAL7 3EJAL7 3ELAL7 3ENAL7 3EPAL7 3EQAL7 3ERAL7 3ESAL7 3ETAL7 3EUAL7 3EWAL7 3EXAL7 3EYAL7 3EZAL7 3FAAL7 3FBAL7 3FDAL7 3FEAL7 3FGAL7 3FHAL7 3FJAL7 3FLAL7 3FQAL7 3GBAL7 3HAAL7 3HBAL7 3HDAL7 3HEAL7 3HFAL7 3HGAL7 3HHAL7 3HJAL7 3HLAL7 3HNAL7 3HQAL7 3HRAL7 3HSAL7 3HTAL7 3HUAL7 3HWAL7 3HXAL7 3HYAL7 3HZAL7 3JAAL7 3JDAL7 3JEAL7 3JFAL7 3JGAL7 3JHAL7 3JJAL7 3JNAL7 3JPAL7 3JQAL7 3JRAL7 3JSAL7 3JTAL7 3JUAL7 3JWAL7 3JXAL7 3JYAL7 3JZAL7 3LAAL7 3LBAL7 3LDAL7 3LEAL7 3LFAL7 3LGAL7 3LHAL7 3LJAL7 3LLAL7 3LNAL7 3LPAL7 3LQAL7 3LRAL7 3LSAL7 3LTAL7 3LWAL7 3LXAL7 3LYAL7 3LZAL7 3NAAL7 3NBAL7 3NDAL7 3NEAL7 3NFAL7 3NGAL7 3NHAL7 3NJAL7 3NLAL7 3NNAL7 3NPAL7 3NQAL7 3NRAL7 3NSAL7 3NTAL7 3NUAL7 3NWAL7 3NXAL7 3NYAL7 3NZAL7 3PAAL7 3PBAL7 3PDAL7 3PGAL7 3PHAL7 3PJAL7 3PLAL7 3PNAL7 3PPAL7 3PUAL7 3PWAL7 3PXAL7 3PYAL7 3PZAL7 3QAAL7 3QBAL7 3QDAL7 3QEAL7 3QFAL7 3QGAL7 3QHAL7 3QJAL7 3QLAL7 3QPAL7 3QQAL7 3QRAL7 3QSAL7 3QTAL7 3QWAL7 3QZAL7 3RAAL7 3RBAL7 3RDAL7 3REAL7 3RFAL7 3RGAL7 3RHAL7 3RJAL7 3RLAL7 3RNAL7 3RPAL7 3RQAL7 3RRAL7 3RSAL7 3RTAL7 3RUAL7 3RWAL7 3RXAL7 3RYAL7 3RZAL7 3SAAL7 3SBAL7 3SDAL7 3SFAL7 3SHAL7 3SJAL7 3SNAL7 3SRAL7 3STAL7 3SXAL7 3SYAL7 3TBAL7 3TDAL7 3TEAL7 3TFAL7 3TGAL7 3THAL7 3TJAL7 3TLAL7 3TNAL7 3TPAL7 3TQAL7 3TRAL7 3TSAL7 3TTAL7 3TUAL7 3TWAL7 3UAAL7 3UBAL7 3UDAL7 3UEAL7 3UHAL7 3UJAL7 3ULAL7 3UNAL7 3UPAL7 3UQAL7 3UUAL7 3UWAL7 3UXAL7 3UZAL7 3XAAL7 3XBAL7 3XDAL7 3XEAL7 3XFAL7 3XGAL7 3XHAL7 3XJAL7 3XLAL7 3XNAL7 3XPAL7 3XW

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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