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, and which are new since 2020

Map of every postcode in the NN1 1 sector, by new since 2020 Of the 132 postcodes in the NN1 1 sector that ONS places, 7 are new since 2020 and 125 were in use before 2020. Places named: Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5095A428A508 NN1 1AF: before 2020NN1 1AG: before 2020NN1 1AJ: before 2020NN1 1AL: before 2020NN1 1BQ: before 2020NN1 1DA: before 2020NN1 1DD: before 2020NN1 1DE: before 2020NN1 1DF: before 2020NN1 1DH: before 2020NN1 1DJ: before 2020NN1 1DP: before 2020NN1 1DQ: before 2020NN1 1ED: before 2020NN1 1EE: before 2020NN1 1EL: before 2020NN1 1EN: before 2020NN1 1EP: before 2020NN1 1EQ: before 2020NN1 1ER: before 2020NN1 1ES: before 2020NN1 1ET: before 2020NN1 1EW: before 2020NN1 1EX: before 2020NN1 1EY: before 2020NN1 1EZ: before 2020NN1 1FA: before 2020NN1 1FD: before 2020NN1 1FF: before 2020NN1 1HB: before 2020NN1 1HF: before 2020NN1 1HH: before 2020NN1 1HJ: before 2020NN1 1HL: before 2020NN1 1HS: before 2020NN1 1HW: before 2020NN1 1JA: before 2020NN1 1JB: before 2020NN1 1JF: before 2020NN1 1JS: before 2020NN1 1JT: before 2020NN1 1JW: before 2020NN1 1JX: before 2020NN1 1JY: before 2020NN1 1LD: before 2020NN1 1LG: before 2020NN1 1LJ: before 2020NN1 1LN: before 2020NN1 1LQ: before 2020NN1 1LW: before 2020NN1 1LX: before 2020NN1 1LZ: before 2020NN1 1NH: before 2020NN1 1NR: before 2020NN1 1NS: before 2020NN1 1NT: before 2020NN1 1NW: before 2020NN1 1PA: before 2020NN1 1PB: before 2020NN1 1PD: before 2020NN1 1PF: before 2020NN1 1PJ: before 2020NN1 1PN: before 2020NN1 1PP: before 2020NN1 1PR: before 2020NN1 1PS: before 2020NN1 1PT: before 2020NN1 1PY: before 2020NN1 1PZ: before 2020NN1 1QF: before 2020NN1 1RA: before 2020NN1 1RS: before 2020NN1 1RT: before 2020NN1 1SA: before 2020NN1 1SH: before 2020NN1 1SN: before 2020NN1 1SP: before 2020NN1 1SR: before 2020NN1 1ST: before 2020NN1 1SW: before 2020NN1 1SX: before 2020NN1 1SY: before 2020NN1 1TA: before 2020NN1 1TB: before 2020NN1 1TD: before 2020NN1 1TP: before 2020NN1 1TU: before 2020NN1 1TY: before 2020NN1 1UB: before 2020NN1 1UD: before 2020NN1 1UE: before 2020NN1 1UG: before 2020NN1 1UH: before 2020NN1 1UJ: before 2020NN1 1US: before 2020NN1 1BF: new since 2020NN1 1DR: new since 2020NN1 1FE: new since 2020NN1 1FG: new since 2020NN1 1FH: new since 2020NN1 1FJ: new since 2020NN1 1FL: new since 2020 Castle Map of every postcode in the NN1 1 sector, by new since 2020 Of the 132 postcodes in the NN1 1 sector that ONS places, 7 are new since 2020 and 125 were in use before 2020. Places named: Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A5095 Castle
  • New since 2020: 7
  • In use before 2020: 125

Of the 132 postcodes in the NN1 1 sector that ONS places, 7 are new since 2020 and 125 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. 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; when each came into use: the same directory; 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 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

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.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.