MK18 5 postcode sector in the MK18 district

MK18 5 is a sector of the MK18 district: every postcode that starts MK18 5. It has 122 postcodes in use, 2 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 MK18 5 sector, by flood risk

Map of every postcode in the MK18 5 sector, by flood risk Of the 122 postcodes in the MK18 5 sector that ONS places, 4 have a home or business at high risk, 3 are at medium risk at worst, 1 are at low risk at worst and 114 are not on the Environment Agency's at-risk list. Places named: Buckingham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. MK18 5AA: not on the flood risk listMK18 5AB: not on the flood risk listMK18 5AD: not on the flood risk listMK18 5AE: not on the flood risk listMK18 5AF: not on the flood risk listMK18 5AG: not on the flood risk listMK18 5AH: not on the flood risk listMK18 5AJ: not on the flood risk listMK18 5AL: not on the flood risk listMK18 5AN: not on the flood risk listMK18 5AP: not on the flood risk listMK18 5AQ: not on the flood risk listMK18 5AR: not on the flood risk listMK18 5AT: not on the flood risk listMK18 5AW: not on the flood risk listMK18 5AX: not on the flood risk listMK18 5AY: not on the flood risk listMK18 5AZ: not on the flood risk listMK18 5BB: not on the flood risk listMK18 5BD: not on the flood risk listMK18 5BF: not on the flood risk listMK18 5BG: not on the flood risk listMK18 5BH: not on the flood risk listMK18 5BJ: not on the flood risk listMK18 5BL: not on the flood risk listMK18 5BN: not on the flood risk listMK18 5BP: not on the flood risk listMK18 5BS: not on the flood risk listMK18 5BT: not on the flood risk listMK18 5BW: not on the flood risk listMK18 5BZ: not on the flood risk listMK18 5DA: not on the flood risk listMK18 5DB: not on the flood risk listMK18 5DD: not on the flood risk listMK18 5DE: not on the flood risk listMK18 5DF: not on the flood risk listMK18 5DH: not on the flood risk listMK18 5DJ: not on the flood risk listMK18 5DN: not on the flood risk listMK18 5DP: not on the flood risk listMK18 5DQ: not on the flood risk listMK18 5DR: not on the flood risk listMK18 5DS: not on the flood risk listMK18 5DT: not on the flood risk listMK18 5DU: not on the flood risk listMK18 5DX: not on the flood risk listMK18 5DY: not on the flood risk listMK18 5DZ: not on the flood risk listMK18 5EA: not on the flood risk listMK18 5EB: not on the flood risk listMK18 5ED: not on the flood risk listMK18 5EE: not on the flood risk listMK18 5EF: not on the flood risk listMK18 5EG: not on the flood risk listMK18 5EH: not on the flood risk listMK18 5EQ: not on the flood risk listMK18 5EX: not on the flood risk listMK18 5EY: not on the flood risk listMK18 5GZ: not on the flood risk listMK18 5HA: not on the flood risk listMK18 5HB: not on the flood risk listMK18 5HD: not on the flood risk listMK18 5HE: not on the flood risk listMK18 5HG: not on the flood risk listMK18 5HH: not on the flood risk listMK18 5HJ: not on the flood risk listMK18 5HL: not on the flood risk listMK18 5HP: not on the flood risk listMK18 5HQ: not on the flood risk listMK18 5HR: not on the flood risk listMK18 5HS: not on the flood risk listMK18 5HU: not on the flood risk listMK18 5HW: not on the flood risk listMK18 5HX: not on the flood risk listMK18 5HZ: not on the flood risk listMK18 5JE: not on the flood risk listMK18 5JG: not on the flood risk listMK18 5JH: not on the flood risk listMK18 5JJ: not on the flood risk listMK18 5JL: not on the flood risk listMK18 5JN: not on the flood risk listMK18 5JX: not on the flood risk listMK18 5JY: not on the flood risk listMK18 5JZ: not on the flood risk listMK18 5LA: not on the flood risk listMK18 5LB: not on the flood risk listMK18 5LD: not on the flood risk listMK18 5LE: not on the flood risk listMK18 5LF: not on the flood risk listMK18 5LG: not on the flood risk listMK18 5LH: not on the flood risk listMK18 5LJ: not on the flood risk listMK18 5LQ: not on the flood risk listMK18 5LT: not on the flood risk listMK18 5LU: not on the flood risk listMK18 5LZ: not on the flood risk listMK18 5NA: not on the flood risk listMK18 5NB: not on the flood risk listMK18 5ND: not on the flood risk listMK18 5NE: not on the flood risk listMK18 5NN: not on the flood risk listMK18 5NP: not on the flood risk listMK18 5NR: not on the flood risk listMK18 5NS: not on the flood risk listMK18 5NW: not on the flood risk listMK18 5NX: not on the flood risk listMK18 5NY: not on the flood risk listMK18 5NZ: not on the flood risk listMK18 5PA: not on the flood risk listMK18 5ZR: not on the flood risk listMK18 5BE: low flood risk at worstMK18 5BQ: medium flood risk at worstMK18 5EZ: medium flood risk at worstMK18 5LY: medium flood risk at worstMK18 5AS: high flood riskMK18 5AU: high flood riskMK18 5LX: high flood riskMK18 5NU: high flood risk Buckingham Map of every postcode in the MK18 5 sector, by flood risk Of the 122 postcodes in the MK18 5 sector that ONS places, 4 have a home or business at high risk, 3 are at medium risk at worst, 1 are at low risk at worst and 114 are not on the Environment Agency's at-risk list. Places named: Buckingham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. Buckingham
  • A home or business at high risk: 4
  • At medium risk at worst: 3
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 114

Of the 122 postcodes in the MK18 5 sector that ONS places, 4 have a home or business at high risk, 3 are at medium risk at worst, 1 are at low risk at worst and 114 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.

MK18 5NU1 at high riskMK18 5AS1 at high riskMK18 5AU1 at high riskMK18 5LX1 at high risk

What do homes sell for in MK18 5?

Homes in MK18 5 sold for a typical £355,000 in the 12 months to August 2026, across 11 sales, down 54.3% on the 12 months before, HM Land Registry's figures show.

£355,000 typical price, the 12 months to August 2026
£777,250 12 months to August 2025
▼ down 54.3% on the 12 months before
  • Detached 3 sales, too few to price
  • Semi-detached 4 sales, too few to price
  • Terraced 4 sales, too few to price

Standard sales of homes at market value at the postcodes that start MK18 5. 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 MK18 5

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.

MK18 5AAMK18 5ABMK18 5ADMK18 5AEMK18 5AFMK18 5AGMK18 5AHMK18 5AJMK18 5ALMK18 5ANMK18 5APMK18 5AQMK18 5ARMK18 5ASMK18 5ATMK18 5AUMK18 5AWMK18 5AXMK18 5AYMK18 5AZMK18 5BBMK18 5BDMK18 5BEMK18 5BFMK18 5BGMK18 5BHMK18 5BJMK18 5BLMK18 5BNMK18 5BPMK18 5BQMK18 5BSMK18 5BTMK18 5BWMK18 5BZMK18 5DAMK18 5DBMK18 5DDMK18 5DEMK18 5DFMK18 5DHMK18 5DJMK18 5DNMK18 5DPMK18 5DQMK18 5DRMK18 5DSMK18 5DTMK18 5DUMK18 5DXMK18 5DYMK18 5DZMK18 5EAMK18 5EBMK18 5EDMK18 5EEMK18 5EFMK18 5EGMK18 5EHMK18 5EQMK18 5EXMK18 5EYMK18 5EZMK18 5GZMK18 5HAMK18 5HBMK18 5HDMK18 5HEMK18 5HFMK18 5HGMK18 5HHMK18 5HJMK18 5HLMK18 5HNMK18 5HPMK18 5HQMK18 5HRMK18 5HSMK18 5HUMK18 5HWMK18 5HXMK18 5HZMK18 5JEMK18 5JFMK18 5JGMK18 5JHMK18 5JJMK18 5JLMK18 5JNMK18 5JPMK18 5JXMK18 5JYMK18 5JZMK18 5LAMK18 5LBMK18 5LDMK18 5LEMK18 5LFMK18 5LGMK18 5LHMK18 5LJMK18 5LQMK18 5LTMK18 5LUMK18 5LXMK18 5LYMK18 5LZMK18 5NAMK18 5NBMK18 5NDMK18 5NEMK18 5NNMK18 5NPMK18 5NRMK18 5NSMK18 5NUMK18 5NWMK18 5NXMK18 5NYMK18 5NZMK18 5PAMK18 5ZR

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.

Check a postcode

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