MK18 4 postcode sector in the MK18 district

MK18 4 is a sector of the MK18 district: every postcode that starts MK18 4. It has 193 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 4 sector, by flood risk

Map of every postcode in the MK18 4 sector, by flood risk Of the 193 postcodes in the MK18 4 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 188 are not on the Environment Agency's at-risk list. Places named: Buckingham, Steeple Claydon, Tingewick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A4421A422 MK18 4AA: not on the flood risk listMK18 4AD: not on the flood risk listMK18 4AF: not on the flood risk listMK18 4AG: not on the flood risk listMK18 4AH: not on the flood risk listMK18 4AJ: not on the flood risk listMK18 4AL: not on the flood risk listMK18 4AN: not on the flood risk listMK18 4AP: not on the flood risk listMK18 4AQ: not on the flood risk listMK18 4AR: not on the flood risk listMK18 4AS: not on the flood risk listMK18 4AT: not on the flood risk listMK18 4AU: not on the flood risk listMK18 4AW: not on the flood risk listMK18 4AX: not on the flood risk listMK18 4AY: not on the flood risk listMK18 4AZ: not on the flood risk listMK18 4BA: not on the flood risk listMK18 4BB: not on the flood risk listMK18 4BD: not on the flood risk listMK18 4BE: not on the flood risk listMK18 4BG: not on the flood risk listMK18 4BH: not on the flood risk listMK18 4BL: not on the flood risk listMK18 4BP: not on the flood risk listMK18 4BQ: not on the flood risk listMK18 4BS: not on the flood risk listMK18 4BT: not on the flood risk listMK18 4BU: not on the flood risk listMK18 4BW: not on the flood risk listMK18 4BX: not on the flood risk listMK18 4BY: not on the flood risk listMK18 4BZ: not on the flood risk listMK18 4DA: not on the flood risk listMK18 4DB: not on the flood risk listMK18 4DD: not on the flood risk listMK18 4DE: not on the flood risk listMK18 4DF: not on the flood risk listMK18 4DG: not on the flood risk listMK18 4DH: not on the flood risk listMK18 4DN: not on the flood risk listMK18 4DP: not on the flood risk listMK18 4DR: not on the flood risk listMK18 4DS: not on the flood risk listMK18 4DT: not on the flood risk listMK18 4DU: not on the flood risk listMK18 4DW: not on the flood risk listMK18 4DX: not on the flood risk listMK18 4EA: not on the flood risk listMK18 4EB: not on the flood risk listMK18 4ED: not on the flood risk listMK18 4EE: not on the flood risk listMK18 4EF: not on the flood risk listMK18 4EG: not on the flood risk listMK18 4EH: not on the flood risk listMK18 4EL: not on the flood risk listMK18 4EP: not on the flood risk listMK18 4EQ: not on the flood risk listMK18 4ER: not on the flood risk listMK18 4ES: not on the flood risk listMK18 4ET: not on the flood risk listMK18 4EU: not on the flood risk listMK18 4EW: not on the flood risk listMK18 4EX: not on the flood risk listMK18 4EY: not on the flood risk listMK18 4FD: not on the flood risk listMK18 4FE: not on the flood risk listMK18 4FG: not on the flood risk listMK18 4FH: not on the flood risk listMK18 4FJ: not on the flood risk listMK18 4FL: not on the flood risk listMK18 4FN: not on the flood risk listMK18 4FP: not on the flood risk listMK18 4FQ: not on the flood risk listMK18 4FR: not on the flood risk listMK18 4FS: not on the flood risk listMK18 4HA: not on the flood risk listMK18 4HB: not on the flood risk listMK18 4HE: not on the flood risk listMK18 4HF: not on the flood risk listMK18 4HJ: not on the flood risk listMK18 4HL: not on the flood risk listMK18 4HN: not on the flood risk listMK18 4HP: not on the flood risk listMK18 4HR: not on the flood risk listMK18 4HT: not on the flood risk listMK18 4HU: not on the flood risk listMK18 4HW: not on the flood risk listMK18 4HX: not on the flood risk listMK18 4HY: not on the flood risk listMK18 4HZ: not on the flood risk listMK18 4JA: not on the flood risk listMK18 4JB: not on the flood risk listMK18 4JD: not on the flood risk listMK18 4JE: not on the flood risk listMK18 4JF: not on the flood risk listMK18 4JG: not on the flood risk listMK18 4JH: not on the flood risk listMK18 4JJ: not on the flood risk listMK18 4JQ: not on the flood risk listMK18 4JR: not on the flood risk listMK18 4JS: not on the flood risk listMK18 4JT: not on the flood risk listMK18 4JU: not on the flood risk listMK18 4JX: not on the flood risk listMK18 4JY: not on the flood risk listMK18 4JZ: not on the flood risk listMK18 4LA: not on the flood risk listMK18 4LB: not on the flood risk listMK18 4LD: not on the flood risk listMK18 4LE: not on the flood risk listMK18 4LF: not on the flood risk listMK18 4LG: not on the flood risk listMK18 4LH: not on the flood risk listMK18 4LJ: not on the flood risk listMK18 4LL: not on the flood risk listMK18 4LN: not on the flood risk listMK18 4LP: not on the flood risk listMK18 4LQ: not on the flood risk listMK18 4LR: not on the flood risk listMK18 4LT: not on the flood risk listMK18 4LU: not on the flood risk listMK18 4LX: not on the flood risk listMK18 4LY: not on the flood risk listMK18 4NA: not on the flood risk listMK18 4NB: not on the flood risk listMK18 4ND: not on the flood risk listMK18 4NE: not on the flood risk listMK18 4NF: not on the flood risk listMK18 4NG: not on the flood risk listMK18 4NH: not on the flood risk listMK18 4NL: not on the flood risk listMK18 4NN: not on the flood risk listMK18 4NP: not on the flood risk listMK18 4NQ: not on the flood risk listMK18 4NR: not on the flood risk listMK18 4NS: not on the flood risk listMK18 4NT: not on the flood risk listMK18 4NU: not on the flood risk listMK18 4NW: not on the flood risk listMK18 4NX: not on the flood risk listMK18 4NY: not on the flood risk listMK18 4PD: not on the flood risk listMK18 4PF: not on the flood risk listMK18 4PH: not on the flood risk listMK18 4PL: not on the flood risk listMK18 4PP: not on the flood risk listMK18 4PQ: not on the flood risk listMK18 4PR: not on the flood risk listMK18 4PS: not on the flood risk listMK18 4PZ: not on the flood risk listMK18 4QD: not on the flood risk listMK18 4QF: not on the flood risk listMK18 4QG: not on the flood risk listMK18 4QH: not on the flood risk listMK18 4QJ: not on the flood risk listMK18 4QL: not on the flood risk listMK18 4QN: not on the flood risk listMK18 4QQ: not on the flood risk listMK18 4QR: not on the flood risk listMK18 4QU: not on the flood risk listMK18 4QX: not on the flood risk listMK18 4QY: not on the flood risk listMK18 4QZ: not on the flood risk listMK18 4RA: not on the flood risk listMK18 4RB: not on the flood risk listMK18 4RD: not on the flood risk listMK18 4RE: not on the flood risk listMK18 4RF: not on the flood risk listMK18 4RH: not on the flood risk listMK18 4RL: not on the flood risk listMK18 4RQ: not on the flood risk listMK18 4ZS: not on the flood risk listMK18 4AE: low flood risk at worstMK18 4DL: medium flood risk at worstMK18 4AB: high flood riskMK18 4DY: high flood riskMK18 4DZ: high flood risk BuckinghamSteeple ClaydonTingewick Map of every postcode in the MK18 4 sector, by flood risk Of the 193 postcodes in the MK18 4 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 188 are not on the Environment Agency's at-risk list. Places named: Buckingham, Steeple Claydon, Tingewick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. BuckinghamSteeple ClaydonTingewick
  • A home or business at high risk: 3
  • At medium risk at worst: 1
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 188

Of the 193 postcodes in the MK18 4 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 1 are at low risk at worst and 188 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

The postcodes at high risk

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

MK18 4DY3 at high riskMK18 4AB1 at high riskMK18 4DZ1 at high risk

What do homes sell for in MK18 4?

Homes in MK18 4 sold for a typical £360,000 in the 12 months to August 2026, across 31 sales, down 29.4% on the 12 months before, HM Land Registry's figures show.

£360,000 typical price, the 12 months to August 2026
£510,000 12 months to August 2025
▼ down 29.4% on the 12 months before
  • Detached £650,000 15 sales
  • Semi-detached £342,500 10 sales
  • Terraced £289,995 5 sales
  • Flat or maisonette 1 sale, too few to price

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 MK18 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 MK18 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.

MK18 4AAMK18 4ABMK18 4ADMK18 4AEMK18 4AFMK18 4AGMK18 4AHMK18 4AJMK18 4ALMK18 4ANMK18 4APMK18 4AQMK18 4ARMK18 4ASMK18 4ATMK18 4AUMK18 4AWMK18 4AXMK18 4AYMK18 4AZMK18 4BAMK18 4BBMK18 4BDMK18 4BEMK18 4BGMK18 4BHMK18 4BLMK18 4BPMK18 4BQMK18 4BSMK18 4BTMK18 4BUMK18 4BWMK18 4BXMK18 4BYMK18 4BZMK18 4DAMK18 4DBMK18 4DDMK18 4DEMK18 4DFMK18 4DGMK18 4DHMK18 4DLMK18 4DNMK18 4DPMK18 4DRMK18 4DSMK18 4DTMK18 4DUMK18 4DWMK18 4DXMK18 4DYMK18 4DZMK18 4EAMK18 4EBMK18 4EDMK18 4EEMK18 4EFMK18 4EGMK18 4EHMK18 4EJMK18 4ELMK18 4ENMK18 4EPMK18 4EQMK18 4ERMK18 4ESMK18 4ETMK18 4EUMK18 4EWMK18 4EXMK18 4EYMK18 4EZMK18 4FDMK18 4FEMK18 4FGMK18 4FHMK18 4FJMK18 4FLMK18 4FNMK18 4FPMK18 4FQMK18 4FRMK18 4FSMK18 4HAMK18 4HBMK18 4HEMK18 4HFMK18 4HJMK18 4HLMK18 4HNMK18 4HPMK18 4HRMK18 4HSMK18 4HTMK18 4HUMK18 4HWMK18 4HXMK18 4HYMK18 4HZMK18 4JAMK18 4JBMK18 4JDMK18 4JEMK18 4JFMK18 4JGMK18 4JHMK18 4JJMK18 4JQMK18 4JRMK18 4JSMK18 4JTMK18 4JUMK18 4JXMK18 4JYMK18 4JZMK18 4LAMK18 4LBMK18 4LDMK18 4LEMK18 4LFMK18 4LGMK18 4LHMK18 4LJMK18 4LLMK18 4LNMK18 4LPMK18 4LQMK18 4LRMK18 4LSMK18 4LTMK18 4LUMK18 4LXMK18 4LYMK18 4NAMK18 4NBMK18 4NDMK18 4NEMK18 4NFMK18 4NGMK18 4NHMK18 4NLMK18 4NNMK18 4NPMK18 4NQMK18 4NRMK18 4NSMK18 4NTMK18 4NUMK18 4NWMK18 4NXMK18 4NYMK18 4PAMK18 4PDMK18 4PFMK18 4PHMK18 4PJMK18 4PLMK18 4PPMK18 4PQMK18 4PRMK18 4PSMK18 4PTMK18 4PZMK18 4QAMK18 4QBMK18 4QDMK18 4QEMK18 4QFMK18 4QGMK18 4QHMK18 4QJMK18 4QLMK18 4QNMK18 4QPMK18 4QQMK18 4QRMK18 4QSMK18 4QUMK18 4QWMK18 4QXMK18 4QYMK18 4QZMK18 4RAMK18 4RBMK18 4RDMK18 4REMK18 4RFMK18 4RHMK18 4RLMK18 4RQMK18 4ZS

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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