MK9 4 postcode sector in the MK9 district

MK9 4 is a sector of the MK9 district: every postcode that starts MK9 4. It has 35 postcodes in use.

Not sure what a sector is? UK postcode format explained.

Every postcode in the MK9 4 sector, and which are new since 2020

Map of every postcode in the MK9 4 sector, by new since 2020 Of the 35 postcodes in the MK9 4 sector that ONS places, 15 are new since 2020 and 20 were in use before 2020. One group of new postcodes is outlined: 15 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Campbell Park & Willen. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A509 MK9 4AB: before 2020MK9 4AD: before 2020MK9 4AF: before 2020MK9 4AG: before 2020MK9 4AH: before 2020MK9 4AJ: before 2020MK9 4AN: before 2020MK9 4AP: before 2020MK9 4AQ: before 2020MK9 4AS: before 2020MK9 4AT: before 2020MK9 4AU: before 2020MK9 4AW: before 2020MK9 4BA: before 2020MK9 4BB: before 2020MK9 4BD: before 2020MK9 4BE: before 2020MK9 4BJ: before 2020MK9 4DD: before 2020MK9 4BG: new since 2020MK9 4BH: new since 2020MK9 4BL: new since 2020MK9 4BN: new since 2020MK9 4BP: new since 2020MK9 4BQ: new since 2020MK9 4BR: new since 2020MK9 4BS: new since 2020MK9 4BT: new since 2020MK9 4BU: new since 2020MK9 4BW: new since 2020MK9 4BX: new since 2020MK9 4BY: new since 2020MK9 4BZ: new since 2020MK9 4DB: new since 2020 Campbell Park & Willen 15 new postcodes since 2020, outlined: this goes to MK9 4BL, the newest of them15 new postcodes since 2020 Map of every postcode in the MK9 4 sector, by new since 2020 Of the 35 postcodes in the MK9 4 sector that ONS places, 15 are new since 2020 and 20 were in use before 2020. One group of new postcodes is outlined: 15 new postcodes since 2020. One postcode lies beyond the edge and is listed under the map. Places named: Campbell Park & Willen. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Campbell Park & Willen
  • New since 2020: 15
  • In use before 2020: 20
  • Outline: where 5 or more new postcodes since 2020 lie together

Of the 35 postcodes in the MK9 4 sector that ONS places, 15 are new since 2020 and 20 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. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and 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

The 5 newest postcodes

MK9 4BLOctober 2024MK9 4BNOctober 2024MK9 4BXMarch 2023MK9 4BUJanuary 2023MK9 4BWJanuary 2023

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

MK9 4AE

Where the new postcodes lie together

  • 15 new postcodes since 2020, outlined on the map. MK9 4BL, is the newest of them.

What do homes sell for in MK9 4?

Homes in MK9 4 sold for a typical £207,500 in the 12 months to August 2026, across 18 sales, down 27.8% on the 12 months before, HM Land Registry's figures show.

£207,500 typical price, the 12 months to August 2026
£287,500 12 months to August 2025
▼ down 27.8% on the 12 months before
  • Terraced 1 sale, too few to price
  • Flat or maisonette £205,000 17 sales

Standard sales of homes at market value at the postcodes that start MK9 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 MK9 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.

MK9 4ABMK9 4ADMK9 4AEMK9 4AFMK9 4AGMK9 4AHMK9 4AJMK9 4ANMK9 4APMK9 4AQMK9 4ASMK9 4ATMK9 4AUMK9 4AWMK9 4BAMK9 4BBMK9 4BDMK9 4BEMK9 4BGMK9 4BHMK9 4BJMK9 4BLMK9 4BNMK9 4BPMK9 4BQMK9 4BRMK9 4BSMK9 4BTMK9 4BUMK9 4BWMK9 4BXMK9 4BYMK9 4BZMK9 4DBMK9 4DD

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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