BL1 1 postcode sector in the BL1 district

BL1 1 is a sector of the BL1 district: every postcode that starts BL1 1. It has 119 postcodes in use, 21 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 BL1 1 sector, by flood risk

Map of every postcode in the BL1 1 sector, by flood risk Of the 119 postcodes in the BL1 1 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 116 are not on the Environment Agency's at-risk list. Places named: Bolton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A666A673A676 BL1 1AP: not on the flood risk listBL1 1AQ: not on the flood risk listBL1 1AR: not on the flood risk listBL1 1AT: not on the flood risk listBL1 1AU: not on the flood risk listBL1 1AW: not on the flood risk listBL1 1AX: not on the flood risk listBL1 1AY: not on the flood risk listBL1 1AZ: not on the flood risk listBL1 1BB: not on the flood risk listBL1 1BD: not on the flood risk listBL1 1BG: not on the flood risk listBL1 1BH: not on the flood risk listBL1 1BJ: not on the flood risk listBL1 1BL: not on the flood risk listBL1 1BN: not on the flood risk listBL1 1BQ: not on the flood risk listBL1 1BR: not on the flood risk listBL1 1BU: not on the flood risk listBL1 1DA: not on the flood risk listBL1 1DB: not on the flood risk listBL1 1DD: not on the flood risk listBL1 1DF: not on the flood risk listBL1 1DG: not on the flood risk listBL1 1DH: not on the flood risk listBL1 1DJ: not on the flood risk listBL1 1DR: not on the flood risk listBL1 1DW: not on the flood risk listBL1 1DY: not on the flood risk listBL1 1EA: not on the flood risk listBL1 1EB: not on the flood risk listBL1 1EJ: not on the flood risk listBL1 1EL: not on the flood risk listBL1 1ES: not on the flood risk listBL1 1EU: not on the flood risk listBL1 1EX: not on the flood risk listBL1 1EZ: not on the flood risk listBL1 1FH: not on the flood risk listBL1 1GD: not on the flood risk listBL1 1HA: not on the flood risk listBL1 1HH: not on the flood risk listBL1 1HJ: not on the flood risk listBL1 1HL: not on the flood risk listBL1 1HQ: not on the flood risk listBL1 1HR: not on the flood risk listBL1 1HX: not on the flood risk listBL1 1JL: not on the flood risk listBL1 1JT: not on the flood risk listBL1 1JU: not on the flood risk listBL1 1JZ: not on the flood risk listBL1 1LD: not on the flood risk listBL1 1LF: not on the flood risk listBL1 1LL: not on the flood risk listBL1 1LN: not on the flood risk listBL1 1LR: not on the flood risk listBL1 1LS: not on the flood risk listBL1 1LT: not on the flood risk listBL1 1LY: not on the flood risk listBL1 1NB: not on the flood risk listBL1 1NE: not on the flood risk listBL1 1NH: not on the flood risk listBL1 1NJ: not on the flood risk listBL1 1NP: not on the flood risk listBL1 1NR: not on the flood risk listBL1 1NS: not on the flood risk listBL1 1NT: not on the flood risk listBL1 1PB: not on the flood risk listBL1 1PE: not on the flood risk listBL1 1PJ: not on the flood risk listBL1 1PP: not on the flood risk listBL1 1PQ: not on the flood risk listBL1 1PR: not on the flood risk listBL1 1PS: not on the flood risk listBL1 1PT: not on the flood risk listBL1 1PX: not on the flood risk listBL1 1PZ: not on the flood risk listBL1 1QD: not on the flood risk listBL1 1QN: not on the flood risk listBL1 1QQ: not on the flood risk listBL1 1QY: not on the flood risk listBL1 1QZ: not on the flood risk listBL1 1RD: not on the flood risk listBL1 1RE: not on the flood risk listBL1 1RF: not on the flood risk listBL1 1RJ: not on the flood risk listBL1 1RS: not on the flood risk listBL1 1RT: not on the flood risk listBL1 1RU: not on the flood risk listBL1 1RZ: not on the flood risk listBL1 1SA: not on the flood risk listBL1 1SB: not on the flood risk listBL1 1SN: not on the flood risk listBL1 1SU: not on the flood risk listBL1 1SW: not on the flood risk listBL1 1SX: not on the flood risk listBL1 1SY: not on the flood risk listBL1 1TD: not on the flood risk listBL1 1TS: not on the flood risk listBL1 1UA: not on the flood risk listBL1 1UG: not on the flood risk listBL1 1UH: not on the flood risk listBL1 1UN: not on the flood risk listBL1 1UR: not on the flood risk listBL1 1TY: low flood risk at worstBL1 1TZ: medium flood risk at worstBL1 1TU: high flood risk Bolton Map of every postcode in the BL1 1 sector, by flood risk Of the 119 postcodes in the BL1 1 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 116 are not on the Environment Agency's at-risk list. Places named: Bolton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A673 Bolton
  • A home or business at high risk: 1
  • At medium risk at worst: 1
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 116

Of the 119 postcodes in the BL1 1 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst 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. 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

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

BL1 1TU9 at high risk

What do homes sell for in BL1 1?

HM Land Registry records 4 sales of homes in BL1 1 in the 12 months to August 2026: too few to give a typical price.

  • Terraced 2 sales, too few to price
  • Flat or maisonette 2 sales, too few to price

Standard sales of homes at market value at the postcodes that start BL1 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 BL1 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.

BL1 1APBL1 1AQBL1 1ARBL1 1ASBL1 1ATBL1 1AUBL1 1AWBL1 1AXBL1 1AYBL1 1AZBL1 1BBBL1 1BDBL1 1BGBL1 1BHBL1 1BJBL1 1BLBL1 1BNBL1 1BQBL1 1BRBL1 1BUBL1 1DABL1 1DBBL1 1DDBL1 1DFBL1 1DGBL1 1DHBL1 1DJBL1 1DRBL1 1DWBL1 1DYBL1 1EABL1 1EBBL1 1EJBL1 1ELBL1 1ESBL1 1ETBL1 1EUBL1 1EXBL1 1EZBL1 1FHBL1 1GDBL1 1HABL1 1HHBL1 1HJBL1 1HLBL1 1HQBL1 1HRBL1 1HUBL1 1HXBL1 1JLBL1 1JNBL1 1JTBL1 1JUBL1 1JZBL1 1LDBL1 1LFBL1 1LLBL1 1LNBL1 1LRBL1 1LSBL1 1LTBL1 1LYBL1 1NBBL1 1NEBL1 1NHBL1 1NJBL1 1NPBL1 1NRBL1 1NSBL1 1NTBL1 1PBBL1 1PEBL1 1PJBL1 1PPBL1 1PQBL1 1PRBL1 1PSBL1 1PTBL1 1PXBL1 1PZBL1 1QDBL1 1QJBL1 1QNBL1 1QQBL1 1QYBL1 1QZBL1 1RDBL1 1REBL1 1RFBL1 1RJBL1 1RSBL1 1RTBL1 1RUBL1 1RXBL1 1RZBL1 1SABL1 1SBBL1 1SEBL1 1SNBL1 1SQBL1 1SUBL1 1SWBL1 1SXBL1 1SYBL1 1TDBL1 1TJBL1 1TQBL1 1TSBL1 1TUBL1 1TYBL1 1TZBL1 1UABL1 1UGBL1 1UHBL1 1UNBL1 1URBL1 1USBL1 1WTBL1 1YA

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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