NN1 4 postcode sector in the NN1 district

NN1 4 is a sector of the NN1 district: every postcode that starts NN1 4. It has 199 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 NN1 4 sector, by flood risk

Map of every postcode in the NN1 4 sector, by flood risk Of the 199 postcodes in the NN1 4 sector that ONS places, 199 are not on the Environment Agency's at-risk list. Places named: Northampton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5095 NN1 4AA: not on the flood risk listNN1 4AE: not on the flood risk listNN1 4AF: not on the flood risk listNN1 4AH: not on the flood risk listNN1 4AJ: not on the flood risk listNN1 4AQ: not on the flood risk listNN1 4AT: not on the flood risk listNN1 4AU: not on the flood risk listNN1 4AW: not on the flood risk listNN1 4AZ: not on the flood risk listNN1 4BB: not on the flood risk listNN1 4BD: not on the flood risk listNN1 4BE: not on the flood risk listNN1 4BF: not on the flood risk listNN1 4BG: not on the flood risk listNN1 4BH: not on the flood risk listNN1 4BJ: not on the flood risk listNN1 4BL: not on the flood risk listNN1 4BN: not on the flood risk listNN1 4BP: not on the flood risk listNN1 4BS: not on the flood risk listNN1 4BU: not on the flood risk listNN1 4BW: not on the flood risk listNN1 4BX: not on the flood risk listNN1 4BY: not on the flood risk listNN1 4BZ: not on the flood risk listNN1 4DB: not on the flood risk listNN1 4DG: not on the flood risk listNN1 4DH: not on the flood risk listNN1 4DJ: not on the flood risk listNN1 4DL: not on the flood risk listNN1 4DN: not on the flood risk listNN1 4DP: not on the flood risk listNN1 4DQ: not on the flood risk listNN1 4DR: not on the flood risk listNN1 4DT: not on the flood risk listNN1 4DU: not on the flood risk listNN1 4DW: not on the flood risk listNN1 4DX: not on the flood risk listNN1 4DZ: not on the flood risk listNN1 4EA: not on the flood risk listNN1 4EB: not on the flood risk listNN1 4ED: not on the flood risk listNN1 4EE: not on the flood risk listNN1 4EF: not on the flood risk listNN1 4EH: not on the flood risk listNN1 4EJ: not on the flood risk listNN1 4EN: not on the flood risk listNN1 4EP: not on the flood risk listNN1 4EQ: not on the flood risk listNN1 4ER: not on the flood risk listNN1 4ES: not on the flood risk listNN1 4ET: not on the flood risk listNN1 4EU: not on the flood risk listNN1 4EW: not on the flood risk listNN1 4EX: not on the flood risk listNN1 4EY: not on the flood risk listNN1 4EZ: not on the flood risk listNN1 4FA: not on the flood risk listNN1 4HG: not on the flood risk listNN1 4HJ: not on the flood risk listNN1 4HL: not on the flood risk listNN1 4HN: not on the flood risk listNN1 4HP: not on the flood risk listNN1 4HQ: not on the flood risk listNN1 4HR: not on the flood risk listNN1 4HS: not on the flood risk listNN1 4HU: not on the flood risk listNN1 4HW: not on the flood risk listNN1 4HX: not on the flood risk listNN1 4HZ: not on the flood risk listNN1 4JA: not on the flood risk listNN1 4JB: not on the flood risk listNN1 4JD: not on the flood risk listNN1 4JE: not on the flood risk listNN1 4JG: not on the flood risk listNN1 4JH: not on the flood risk listNN1 4JJ: not on the flood risk listNN1 4JL: not on the flood risk listNN1 4JN: not on the flood risk listNN1 4JP: not on the flood risk listNN1 4JQ: not on the flood risk listNN1 4JR: not on the flood risk listNN1 4JS: not on the flood risk listNN1 4JT: not on the flood risk listNN1 4JU: not on the flood risk listNN1 4JW: not on the flood risk listNN1 4JX: not on the flood risk listNN1 4LA: not on the flood risk listNN1 4LB: not on the flood risk listNN1 4LD: not on the flood risk listNN1 4LE: not on the flood risk listNN1 4LF: not on the flood risk listNN1 4LG: not on the flood risk listNN1 4LH: not on the flood risk listNN1 4LJ: not on the flood risk listNN1 4LL: not on the flood risk listNN1 4LN: not on the flood risk listNN1 4LP: not on the flood risk listNN1 4LQ: not on the flood risk listNN1 4LR: not on the flood risk listNN1 4LS: not on the flood risk listNN1 4LT: not on the flood risk listNN1 4LU: not on the flood risk listNN1 4LW: not on the flood risk listNN1 4LX: not on the flood risk listNN1 4LY: not on the flood risk listNN1 4LZ: not on the flood risk listNN1 4NA: not on the flood risk listNN1 4NB: not on the flood risk listNN1 4ND: not on the flood risk listNN1 4NE: not on the flood risk listNN1 4NF: not on the flood risk listNN1 4NG: not on the flood risk listNN1 4NH: not on the flood risk listNN1 4NJ: not on the flood risk listNN1 4NL: not on the flood risk listNN1 4NN: not on the flood risk listNN1 4NP: not on the flood risk listNN1 4NQ: not on the flood risk listNN1 4NS: not on the flood risk listNN1 4NU: not on the flood risk listNN1 4NW: not on the flood risk listNN1 4NY: not on the flood risk listNN1 4NZ: not on the flood risk listNN1 4PA: not on the flood risk listNN1 4PB: not on the flood risk listNN1 4PD: not on the flood risk listNN1 4PE: not on the flood risk listNN1 4PF: not on the flood risk listNN1 4PG: not on the flood risk listNN1 4PH: not on the flood risk listNN1 4PJ: not on the flood risk listNN1 4PL: not on the flood risk listNN1 4PN: not on the flood risk listNN1 4PP: not on the flood risk listNN1 4PQ: not on the flood risk listNN1 4PR: not on the flood risk listNN1 4PT: not on the flood risk listNN1 4PU: not on the flood risk listNN1 4PW: not on the flood risk listNN1 4PX: not on the flood risk listNN1 4QA: not on the flood risk listNN1 4QB: not on the flood risk listNN1 4QD: not on the flood risk listNN1 4QL: not on the flood risk listNN1 4QN: not on the flood risk listNN1 4QP: not on the flood risk listNN1 4QR: not on the flood risk listNN1 4QS: not on the flood risk listNN1 4QT: not on the flood risk listNN1 4QU: not on the flood risk listNN1 4QW: not on the flood risk listNN1 4QX: not on the flood risk listNN1 4QY: not on the flood risk listNN1 4QZ: not on the flood risk listNN1 4RA: not on the flood risk listNN1 4RB: not on the flood risk listNN1 4RD: not on the flood risk listNN1 4RE: not on the flood risk listNN1 4RF: not on the flood risk listNN1 4RG: not on the flood risk listNN1 4RH: not on the flood risk listNN1 4RJ: not on the flood risk listNN1 4RL: not on the flood risk listNN1 4RN: not on the flood risk listNN1 4RQ: not on the flood risk listNN1 4RR: not on the flood risk listNN1 4RS: not on the flood risk listNN1 4RW: not on the flood risk listNN1 4RX: not on the flood risk listNN1 4RY: not on the flood risk listNN1 4RZ: not on the flood risk listNN1 4SA: not on the flood risk listNN1 4SB: not on the flood risk listNN1 4SD: not on the flood risk listNN1 4SF: not on the flood risk listNN1 4SG: not on the flood risk listNN1 4SH: not on the flood risk listNN1 4SJ: not on the flood risk listNN1 4SL: not on the flood risk listNN1 4SN: not on the flood risk listNN1 4SP: not on the flood risk listNN1 4SQ: not on the flood risk listNN1 4SR: not on the flood risk listNN1 4SS: not on the flood risk listNN1 4ST: not on the flood risk listNN1 4SU: not on the flood risk listNN1 4SW: not on the flood risk listNN1 4SX: not on the flood risk listNN1 4SY: not on the flood risk listNN1 4TG: not on the flood risk listNN1 4TH: not on the flood risk listNN1 4TJ: not on the flood risk listNN1 4TL: not on the flood risk listNN1 4TQ: not on the flood risk listNN1 4WL: not on the flood risk list Northampton Map of every postcode in the NN1 4 sector, by flood risk Of the 199 postcodes in the NN1 4 sector that ONS places, 199 are not on the Environment Agency's at-risk list. Places named: Northampton. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Northampton
  • 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: 199

Of the 199 postcodes in the NN1 4 sector that ONS places, 199 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 NN1 4?

Homes in NN1 4 sold for a typical £218,500 in the 12 months to August 2026, across 116 sales, down 6.5% on the 12 months before, HM Land Registry's figures show.

£218,500 typical price, the 12 months to August 2026
£233,750 12 months to August 2025
▼ down 6.5% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached £310,000 5 sales
  • Terraced £239,500 81 sales
  • Flat or maisonette £144,000 29 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 NN1 4. 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 4

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 4AANN1 4AENN1 4AFNN1 4AHNN1 4AJNN1 4AQNN1 4ATNN1 4AUNN1 4AWNN1 4AZNN1 4BBNN1 4BDNN1 4BENN1 4BFNN1 4BGNN1 4BHNN1 4BJNN1 4BLNN1 4BNNN1 4BPNN1 4BSNN1 4BUNN1 4BWNN1 4BXNN1 4BYNN1 4BZNN1 4DBNN1 4DGNN1 4DHNN1 4DJNN1 4DLNN1 4DNNN1 4DPNN1 4DQNN1 4DRNN1 4DTNN1 4DUNN1 4DWNN1 4DXNN1 4DZNN1 4EANN1 4EBNN1 4EDNN1 4EENN1 4EFNN1 4EHNN1 4EJNN1 4ENNN1 4EPNN1 4EQNN1 4ERNN1 4ESNN1 4ETNN1 4EUNN1 4EWNN1 4EXNN1 4EYNN1 4EZNN1 4FANN1 4HGNN1 4HJNN1 4HLNN1 4HNNN1 4HPNN1 4HQNN1 4HRNN1 4HSNN1 4HUNN1 4HWNN1 4HXNN1 4HZNN1 4JANN1 4JBNN1 4JDNN1 4JENN1 4JGNN1 4JHNN1 4JJNN1 4JLNN1 4JNNN1 4JPNN1 4JQNN1 4JRNN1 4JSNN1 4JTNN1 4JUNN1 4JWNN1 4JXNN1 4LANN1 4LBNN1 4LDNN1 4LENN1 4LFNN1 4LGNN1 4LHNN1 4LJNN1 4LLNN1 4LNNN1 4LPNN1 4LQNN1 4LRNN1 4LSNN1 4LTNN1 4LUNN1 4LWNN1 4LXNN1 4LYNN1 4LZNN1 4NANN1 4NBNN1 4NDNN1 4NENN1 4NFNN1 4NGNN1 4NHNN1 4NJNN1 4NLNN1 4NNNN1 4NPNN1 4NQNN1 4NSNN1 4NUNN1 4NWNN1 4NYNN1 4NZNN1 4PANN1 4PBNN1 4PDNN1 4PENN1 4PFNN1 4PGNN1 4PHNN1 4PJNN1 4PLNN1 4PNNN1 4PPNN1 4PQNN1 4PRNN1 4PTNN1 4PUNN1 4PWNN1 4PXNN1 4QANN1 4QBNN1 4QDNN1 4QLNN1 4QNNN1 4QPNN1 4QRNN1 4QSNN1 4QTNN1 4QUNN1 4QWNN1 4QXNN1 4QYNN1 4QZNN1 4RANN1 4RBNN1 4RDNN1 4RENN1 4RFNN1 4RGNN1 4RHNN1 4RJNN1 4RLNN1 4RNNN1 4RQNN1 4RRNN1 4RSNN1 4RWNN1 4RXNN1 4RYNN1 4RZNN1 4SANN1 4SBNN1 4SDNN1 4SFNN1 4SGNN1 4SHNN1 4SJNN1 4SLNN1 4SNNN1 4SPNN1 4SQNN1 4SRNN1 4SSNN1 4STNN1 4SUNN1 4SWNN1 4SXNN1 4SYNN1 4TGNN1 4THNN1 4TJNN1 4TLNN1 4TQNN1 4WLNN1 4XSNN1 4YW

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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