NN1 3 postcode sector in the NN1 district

NN1 3 is a sector of the NN1 district: every postcode that starts NN1 3. It has 121 postcodes in use, 4 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 3 sector, by flood risk

Map of every postcode in the NN1 3 sector, by flood risk Of the 121 postcodes in the NN1 3 sector that ONS places, 121 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. A508A5123A4500 NN1 3AE: not on the flood risk listNN1 3AH: not on the flood risk listNN1 3AS: not on the flood risk listNN1 3AU: not on the flood risk listNN1 3AX: not on the flood risk listNN1 3BA: not on the flood risk listNN1 3BE: not on the flood risk listNN1 3BG: not on the flood risk listNN1 3BH: not on the flood risk listNN1 3BJ: not on the flood risk listNN1 3BL: not on the flood risk listNN1 3BN: not on the flood risk listNN1 3BP: not on the flood risk listNN1 3BQ: not on the flood risk listNN1 3BU: not on the flood risk listNN1 3BW: not on the flood risk listNN1 3BY: not on the flood risk listNN1 3DA: not on the flood risk listNN1 3DE: not on the flood risk listNN1 3DJ: not on the flood risk listNN1 3DL: not on the flood risk listNN1 3DN: not on the flood risk listNN1 3DP: not on the flood risk listNN1 3DQ: not on the flood risk listNN1 3DS: not on the flood risk listNN1 3DX: not on the flood risk listNN1 3DY: not on the flood risk listNN1 3DZ: not on the flood risk listNN1 3EA: not on the flood risk listNN1 3EB: not on the flood risk listNN1 3EE: not on the flood risk listNN1 3EL: not on the flood risk listNN1 3EN: not on the flood risk listNN1 3EP: not on the flood risk listNN1 3ER: not on the flood risk listNN1 3ES: not on the flood risk listNN1 3ET: not on the flood risk listNN1 3EU: not on the flood risk listNN1 3EW: not on the flood risk listNN1 3EX: not on the flood risk listNN1 3EY: not on the flood risk listNN1 3EZ: not on the flood risk listNN1 3FB: not on the flood risk listNN1 3HB: not on the flood risk listNN1 3HD: not on the flood risk listNN1 3HE: not on the flood risk listNN1 3HH: not on the flood risk listNN1 3HQ: not on the flood risk listNN1 3HS: not on the flood risk listNN1 3HW: not on the flood risk listNN1 3HX: not on the flood risk listNN1 3JA: not on the flood risk listNN1 3JD: not on the flood risk listNN1 3JE: not on the flood risk listNN1 3JF: not on the flood risk listNN1 3JG: not on the flood risk listNN1 3JH: not on the flood risk listNN1 3JL: not on the flood risk listNN1 3JQ: not on the flood risk listNN1 3JS: not on the flood risk listNN1 3JT: not on the flood risk listNN1 3JU: not on the flood risk listNN1 3JW: not on the flood risk listNN1 3JX: not on the flood risk listNN1 3JY: not on the flood risk listNN1 3JZ: not on the flood risk listNN1 3LB: not on the flood risk listNN1 3LD: not on the flood risk listNN1 3LE: not on the flood risk listNN1 3LF: not on the flood risk listNN1 3LG: not on the flood risk listNN1 3LH: not on the flood risk listNN1 3LJ: not on the flood risk listNN1 3LL: not on the flood risk listNN1 3LN: not on the flood risk listNN1 3LP: not on the flood risk listNN1 3LQ: not on the flood risk listNN1 3LR: not on the flood risk listNN1 3LS: not on the flood risk listNN1 3LU: not on the flood risk listNN1 3LW: not on the flood risk listNN1 3LX: not on the flood risk listNN1 3LZ: not on the flood risk listNN1 3NA: not on the flood risk listNN1 3NE: not on the flood risk listNN1 3NL: not on the flood risk listNN1 3NR: not on the flood risk listNN1 3PU: not on the flood risk listNN1 3PX: not on the flood risk listNN1 3PZ: not on the flood risk listNN1 3QA: not on the flood risk listNN1 3QB: not on the flood risk listNN1 3QD: not on the flood risk listNN1 3QE: not on the flood risk listNN1 3QF: not on the flood risk listNN1 3QG: not on the flood risk listNN1 3QJ: not on the flood risk listNN1 3QL: not on the flood risk listNN1 3QN: not on the flood risk listNN1 3QP: not on the flood risk listNN1 3QQ: not on the flood risk listNN1 3QR: not on the flood risk listNN1 3QS: not on the flood risk listNN1 3QT: not on the flood risk listNN1 3QU: not on the flood risk listNN1 3QW: not on the flood risk listNN1 3QX: not on the flood risk listNN1 3RE: not on the flood risk listNN1 3RF: not on the flood risk listNN1 3RJ: not on the flood risk listNN1 3RL: not on the flood risk listNN1 3RN: not on the flood risk listNN1 3RP: not on the flood risk listNN1 3RR: not on the flood risk listNN1 3RS: not on the flood risk list Northampton Map of every postcode in the NN1 3 sector, by flood risk Of the 121 postcodes in the NN1 3 sector that ONS places, 121 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. 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: 121

Of the 121 postcodes in the NN1 3 sector that ONS places, 121 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 3?

Homes in NN1 3 sold for a typical £180,000 in the 12 months to August 2026, across 42 sales, no change on the 12 months before, HM Land Registry's figures show.

£180,000 typical price, the 12 months to August 2026
£180,000 12 months to August 2025
■ no change on the 12 months before
  • Terraced £200,000 30 sales
  • Flat or maisonette £131,500 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 NN1 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 NN1 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.

NN1 3AENN1 3AHNN1 3ASNN1 3AUNN1 3AXNN1 3BANN1 3BENN1 3BGNN1 3BHNN1 3BJNN1 3BLNN1 3BNNN1 3BPNN1 3BQNN1 3BUNN1 3BWNN1 3BYNN1 3DANN1 3DENN1 3DJNN1 3DLNN1 3DNNN1 3DPNN1 3DQNN1 3DRNN1 3DSNN1 3DXNN1 3DYNN1 3DZNN1 3EANN1 3EBNN1 3EENN1 3ELNN1 3ENNN1 3EPNN1 3ERNN1 3ESNN1 3ETNN1 3EUNN1 3EWNN1 3EXNN1 3EYNN1 3EZNN1 3FBNN1 3HBNN1 3HDNN1 3HENN1 3HHNN1 3HQNN1 3HSNN1 3HWNN1 3HXNN1 3JANN1 3JDNN1 3JENN1 3JFNN1 3JGNN1 3JHNN1 3JLNN1 3JQNN1 3JSNN1 3JTNN1 3JUNN1 3JWNN1 3JXNN1 3JYNN1 3JZNN1 3LANN1 3LBNN1 3LDNN1 3LENN1 3LFNN1 3LGNN1 3LHNN1 3LJNN1 3LLNN1 3LNNN1 3LPNN1 3LQNN1 3LRNN1 3LSNN1 3LTNN1 3LUNN1 3LWNN1 3LXNN1 3LZNN1 3NANN1 3NBNN1 3NDNN1 3NENN1 3NLNN1 3NRNN1 3PUNN1 3PXNN1 3PZNN1 3QANN1 3QBNN1 3QDNN1 3QENN1 3QFNN1 3QGNN1 3QJNN1 3QLNN1 3QNNN1 3QPNN1 3QQNN1 3QRNN1 3QSNN1 3QTNN1 3QUNN1 3QWNN1 3QXNN1 3RENN1 3RFNN1 3RJNN1 3RLNN1 3RNNN1 3RPNN1 3RQNN1 3RRNN1 3RS

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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