NN1 1 postcode sector in the NN1 district

NN1 1 is a sector of the NN1 district: every postcode that starts NN1 1. It has 132 postcodes in use, 19 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 NN1 1 sector, by flood risk

Map of every postcode in the NN1 1 sector, by flood risk Of the 132 postcodes in the NN1 1 sector that ONS places, 1 have a home or business at high risk, 17 are at low risk at worst, 5 are at very low risk only and 109 are not on the Environment Agency's at-risk list. Places named: Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5095A428A508 NN1 1AF: not on the flood risk listNN1 1AG: not on the flood risk listNN1 1AJ: not on the flood risk listNN1 1AL: not on the flood risk listNN1 1BF: not on the flood risk listNN1 1DA: not on the flood risk listNN1 1DD: not on the flood risk listNN1 1DE: not on the flood risk listNN1 1DF: not on the flood risk listNN1 1DH: not on the flood risk listNN1 1DJ: not on the flood risk listNN1 1DP: not on the flood risk listNN1 1DQ: not on the flood risk listNN1 1DR: not on the flood risk listNN1 1ED: not on the flood risk listNN1 1EN: not on the flood risk listNN1 1EQ: not on the flood risk listNN1 1ER: not on the flood risk listNN1 1EW: not on the flood risk listNN1 1EZ: not on the flood risk listNN1 1FA: not on the flood risk listNN1 1FD: not on the flood risk listNN1 1FE: not on the flood risk listNN1 1FG: not on the flood risk listNN1 1FH: not on the flood risk listNN1 1FJ: not on the flood risk listNN1 1FL: not on the flood risk listNN1 1HS: not on the flood risk listNN1 1JA: not on the flood risk listNN1 1JB: not on the flood risk listNN1 1JF: not on the flood risk listNN1 1JS: not on the flood risk listNN1 1JT: not on the flood risk listNN1 1JW: not on the flood risk listNN1 1JX: not on the flood risk listNN1 1JY: not on the flood risk listNN1 1LD: not on the flood risk listNN1 1LG: not on the flood risk listNN1 1LJ: not on the flood risk listNN1 1LN: not on the flood risk listNN1 1LQ: not on the flood risk listNN1 1LW: not on the flood risk listNN1 1LX: not on the flood risk listNN1 1LZ: not on the flood risk listNN1 1NH: not on the flood risk listNN1 1NR: not on the flood risk listNN1 1NS: not on the flood risk listNN1 1NT: not on the flood risk listNN1 1NW: not on the flood risk listNN1 1PA: not on the flood risk listNN1 1PB: not on the flood risk listNN1 1PP: not on the flood risk listNN1 1PS: not on the flood risk listNN1 1PT: not on the flood risk listNN1 1RA: not on the flood risk listNN1 1RS: not on the flood risk listNN1 1RT: not on the flood risk listNN1 1SA: not on the flood risk listNN1 1SH: not on the flood risk listNN1 1SN: not on the flood risk listNN1 1SP: not on the flood risk listNN1 1SR: not on the flood risk listNN1 1ST: not on the flood risk listNN1 1SW: not on the flood risk listNN1 1SX: not on the flood risk listNN1 1SY: not on the flood risk listNN1 1TA: not on the flood risk listNN1 1TB: not on the flood risk listNN1 1TD: not on the flood risk listNN1 1TP: not on the flood risk listNN1 1TU: not on the flood risk listNN1 1TY: not on the flood risk listNN1 1UB: not on the flood risk listNN1 1UD: not on the flood risk listNN1 1UE: not on the flood risk listNN1 1UG: not on the flood risk listNN1 1UH: not on the flood risk listNN1 1UJ: not on the flood risk listNN1 1US: not on the flood risk listNN1 1BQ: very low flood risk onlyNN1 1ES: very low flood risk onlyNN1 1HJ: very low flood risk onlyNN1 1PN: very low flood risk onlyNN1 1PR: very low flood risk onlyNN1 1EE: low flood risk at worstNN1 1EL: low flood risk at worstNN1 1EP: low flood risk at worstNN1 1ET: low flood risk at worstNN1 1EX: low flood risk at worstNN1 1EY: low flood risk at worstNN1 1FF: low flood risk at worstNN1 1HB: low flood risk at worstNN1 1HH: low flood risk at worstNN1 1HL: low flood risk at worstNN1 1HW: low flood risk at worstNN1 1PD: low flood risk at worstNN1 1PF: low flood risk at worstNN1 1PJ: low flood risk at worstNN1 1PY: low flood risk at worstNN1 1PZ: low flood risk at worstNN1 1QF: low flood risk at worstNN1 1HF: high flood risk Castle Map of every postcode in the NN1 1 sector, by flood risk Of the 132 postcodes in the NN1 1 sector that ONS places, 1 have a home or business at high risk, 17 are at low risk at worst, 5 are at very low risk only and 109 are not on the Environment Agency's at-risk list. Places named: Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5095 Castle
  • A home or business at high risk: 1
  • At medium risk at worst: 0
  • At low risk at worst: 17
  • At very low risk only: 5
  • Not on the at-risk list: 109

Of the 132 postcodes in the NN1 1 sector that ONS places, 1 have a home or business at high risk, 17 are at low risk at worst, 5 are at very low risk only and 109 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. 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.

NN1 1HF1 at high risk

What do homes sell for in NN1 1?

Homes in NN1 1 sold for a typical £152,000 in the 12 months to August 2026, across 17 sales, up 3.4% on the 12 months before, HM Land Registry's figures show.

£152,000 typical price, the 12 months to August 2026
£147,000 12 months to August 2025
▲ up 3.4% on the 12 months before
  • Terraced 2 sales, too few to price
  • Flat or maisonette £145,000 15 sales

Standard sales of homes at market value at the postcodes that start NN1 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 NN1 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.

NN1 1AFNN1 1AGNN1 1AJNN1 1ALNN1 1BFNN1 1BQNN1 1BXNN1 1DANN1 1DDNN1 1DENN1 1DFNN1 1DHNN1 1DJNN1 1DNNN1 1DPNN1 1DQNN1 1DRNN1 1DTNN1 1EANN1 1EDNN1 1EENN1 1ELNN1 1ENNN1 1EPNN1 1EQNN1 1ERNN1 1ESNN1 1ETNN1 1EWNN1 1EXNN1 1EYNN1 1EZNN1 1FANN1 1FDNN1 1FENN1 1FFNN1 1FGNN1 1FHNN1 1FJNN1 1FLNN1 1HBNN1 1HFNN1 1HHNN1 1HJNN1 1HLNN1 1HSNN1 1HWNN1 1JANN1 1JBNN1 1JFNN1 1JSNN1 1JTNN1 1JWNN1 1JXNN1 1JYNN1 1LDNN1 1LGNN1 1LJNN1 1LNNN1 1LQNN1 1LWNN1 1LXNN1 1LZNN1 1NHNN1 1NRNN1 1NSNN1 1NTNN1 1NWNN1 1PANN1 1PBNN1 1PDNN1 1PFNN1 1PJNN1 1PNNN1 1PPNN1 1PRNN1 1PSNN1 1PTNN1 1PUNN1 1PYNN1 1PZNN1 1QANN1 1QDNN1 1QENN1 1QFNN1 1QHNN1 1QJNN1 1QSNN1 1QTNN1 1QUNN1 1QWNN1 1QXNN1 1QYNN1 1QZNN1 1RANN1 1RBNN1 1RDNN1 1RFNN1 1RGNN1 1RHNN1 1RJNN1 1RLNN1 1RNNN1 1RPNN1 1RQNN1 1RRNN1 1RSNN1 1RTNN1 1SANN1 1SHNN1 1SNNN1 1SPNN1 1SRNN1 1STNN1 1SWNN1 1SXNN1 1SYNN1 1TANN1 1TBNN1 1TDNN1 1TPNN1 1TUNN1 1TYNN1 1UBNN1 1UDNN1 1UENN1 1UGNN1 1UHNN1 1UJNN1 1USNN1 1YTNN1 1ZP

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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