CF45 4 postcode sector in the CF45 district

CF45 4 is a sector of the CF45 district: every postcode that starts CF45 4. It has 233 postcodes in use, 5 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 CF45 4 sector, and which are new since 2020

Map of every postcode in the CF45 4 sector, by new since 2020 Of the 233 postcodes in the CF45 4 sector that ONS places, 2 are new since 2020 and 231 were in use before 2020. Places named: Mountain Ash, Abercynon, Treharris, Ynysybwl, Aberfan. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A470A4054 CF45 4AA: before 2020CF45 4AB: before 2020CF45 4AD: before 2020CF45 4AE: before 2020CF45 4AF: before 2020CF45 4AG: before 2020CF45 4AJ: before 2020CF45 4AL: before 2020CF45 4AP: before 2020CF45 4AQ: before 2020CF45 4AR: before 2020CF45 4AS: before 2020CF45 4AU: before 2020CF45 4AW: before 2020CF45 4AZ: before 2020CF45 4BA: before 2020CF45 4BB: before 2020CF45 4BE: before 2020CF45 4BG: before 2020CF45 4BH: before 2020CF45 4BJ: before 2020CF45 4BL: before 2020CF45 4BN: before 2020CF45 4BP: before 2020CF45 4BQ: before 2020CF45 4BS: before 2020CF45 4BT: before 2020CF45 4BU: before 2020CF45 4BW: before 2020CF45 4BX: before 2020CF45 4BY: before 2020CF45 4BZ: before 2020CF45 4DA: before 2020CF45 4DB: before 2020CF45 4DD: before 2020CF45 4DF: before 2020CF45 4DG: before 2020CF45 4DH: before 2020CF45 4DJ: before 2020CF45 4DL: before 2020CF45 4DN: before 2020CF45 4DP: before 2020CF45 4DQ: before 2020CF45 4DR: before 2020CF45 4DS: before 2020CF45 4DT: before 2020CF45 4DW: before 2020CF45 4DX: before 2020CF45 4DY: before 2020CF45 4DZ: before 2020CF45 4EA: before 2020CF45 4EB: before 2020CF45 4ED: before 2020CF45 4EE: before 2020CF45 4EF: before 2020CF45 4EG: before 2020CF45 4EH: before 2020CF45 4EJ: before 2020CF45 4EL: before 2020CF45 4EN: before 2020CF45 4EP: before 2020CF45 4ER: before 2020CF45 4ES: before 2020CF45 4EW: before 2020CF45 4EX: before 2020CF45 4EY: before 2020CF45 4FA: before 2020CF45 4FB: before 2020CF45 4FD: before 2020CF45 4FE: before 2020CF45 4FF: before 2020CF45 4HA: before 2020CF45 4HB: before 2020CF45 4HD: before 2020CF45 4HE: before 2020CF45 4HF: before 2020CF45 4HG: before 2020CF45 4HH: before 2020CF45 4HJ: before 2020CF45 4HL: before 2020CF45 4HN: before 2020CF45 4HP: before 2020CF45 4HR: before 2020CF45 4HT: before 2020CF45 4HY: before 2020CF45 4LA: before 2020CF45 4LB: before 2020CF45 4LD: before 2020CF45 4LE: before 2020CF45 4LF: before 2020CF45 4LG: before 2020CF45 4LH: before 2020CF45 4LJ: before 2020CF45 4LL: before 2020CF45 4LN: before 2020CF45 4LP: before 2020CF45 4LR: before 2020CF45 4LS: before 2020CF45 4LT: before 2020CF45 4LU: before 2020CF45 4LW: before 2020CF45 4LX: before 2020CF45 4LY: before 2020CF45 4NA: before 2020CF45 4ND: before 2020CF45 4NE: before 2020CF45 4NF: before 2020CF45 4NG: before 2020CF45 4NH: before 2020CF45 4NJ: before 2020CF45 4NL: before 2020CF45 4NN: before 2020CF45 4NR: before 2020CF45 4NS: before 2020CF45 4NT: before 2020CF45 4NU: before 2020CF45 4NW: before 2020CF45 4NY: before 2020CF45 4PA: before 2020CF45 4PB: before 2020CF45 4PD: before 2020CF45 4PE: before 2020CF45 4PF: before 2020CF45 4PG: before 2020CF45 4PH: before 2020CF45 4PJ: before 2020CF45 4PL: before 2020CF45 4PN: before 2020CF45 4PP: before 2020CF45 4PQ: before 2020CF45 4PR: before 2020CF45 4PS: before 2020CF45 4PT: before 2020CF45 4PW: before 2020CF45 4PY: before 2020CF45 4RA: before 2020CF45 4RB: before 2020CF45 4RD: before 2020CF45 4RE: before 2020CF45 4RG: before 2020CF45 4RH: before 2020CF45 4RJ: before 2020CF45 4RL: before 2020CF45 4RN: before 2020CF45 4RP: before 2020CF45 4RR: before 2020CF45 4RS: before 2020CF45 4RU: before 2020CF45 4RX: before 2020CF45 4SA: before 2020CF45 4SB: before 2020CF45 4SD: before 2020CF45 4SE: before 2020CF45 4SF: before 2020CF45 4SH: before 2020CF45 4SN: before 2020CF45 4SP: before 2020CF45 4SR: before 2020CF45 4ST: before 2020CF45 4SU: before 2020CF45 4SW: before 2020CF45 4TA: before 2020CF45 4TB: before 2020CF45 4TD: before 2020CF45 4TE: before 2020CF45 4TF: before 2020CF45 4TH: before 2020CF45 4TJ: before 2020CF45 4TN: before 2020CF45 4TP: before 2020CF45 4TQ: before 2020CF45 4TR: before 2020CF45 4TT: before 2020CF45 4TU: before 2020CF45 4TX: before 2020CF45 4TY: before 2020CF45 4UA: before 2020CF45 4UB: before 2020CF45 4UD: before 2020CF45 4UE: before 2020CF45 4UF: before 2020CF45 4UG: before 2020CF45 4UH: before 2020CF45 4UJ: before 2020CF45 4UL: before 2020CF45 4UN: before 2020CF45 4UP: before 2020CF45 4UQ: before 2020CF45 4UR: before 2020CF45 4UT: before 2020CF45 4UU: before 2020CF45 4UW: before 2020CF45 4UY: before 2020CF45 4XA: before 2020CF45 4XZ: before 2020CF45 4YA: before 2020CF45 4YB: before 2020CF45 4YD: before 2020CF45 4YE: before 2020CF45 4YF: before 2020CF45 4YG: before 2020CF45 4YN: before 2020CF45 4YP: before 2020CF45 4YS: before 2020CF45 4YT: before 2020CF45 4YU: before 2020CF45 4YW: before 2020CF45 4YX: before 2020CF45 4FG: new since 2020 Mountain AshAbercynonTreharrisYnysybwlAberfan Map of every postcode in the CF45 4 sector, by new since 2020 Of the 233 postcodes in the CF45 4 sector that ONS places, 2 are new since 2020 and 231 were in use before 2020. Places named: Mountain Ash, Abercynon, Ynysybwl. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A470 Mountain AshAbercynonYnysybwl
  • New since 2020: 2
  • In use before 2020: 231

Of the 233 postcodes in the CF45 4 sector that ONS places, 2 are new since 2020 and 231 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.

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 2 newest postcodes

CF45 4FGJanuary 2020CF45 4FHJanuary 2020

What do homes sell for in CF45 4?

Homes in CF45 4 sold for a typical £142,000 in the 12 months to August 2026, across 89 sales, up 9.2% on the 12 months before, HM Land Registry's figures show.

£142,000 typical price, the 12 months to August 2026
£130,000 12 months to August 2025
▲ up 9.2% on the 12 months before
  • Detached £297,250 8 sales
  • Semi-detached £164,995 19 sales
  • Terraced £138,000 59 sales
  • Flat or maisonette 3 sales, 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 CF45 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 CF45 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.

CF45 4AACF45 4ABCF45 4ADCF45 4AECF45 4AFCF45 4AGCF45 4AHCF45 4AJCF45 4ALCF45 4ANCF45 4APCF45 4AQCF45 4ARCF45 4ASCF45 4ATCF45 4AUCF45 4AWCF45 4AXCF45 4AYCF45 4AZCF45 4BACF45 4BBCF45 4BDCF45 4BECF45 4BGCF45 4BHCF45 4BJCF45 4BLCF45 4BNCF45 4BPCF45 4BQCF45 4BSCF45 4BTCF45 4BUCF45 4BWCF45 4BXCF45 4BYCF45 4BZCF45 4DACF45 4DBCF45 4DDCF45 4DFCF45 4DGCF45 4DHCF45 4DJCF45 4DLCF45 4DNCF45 4DPCF45 4DQCF45 4DRCF45 4DSCF45 4DTCF45 4DUCF45 4DWCF45 4DXCF45 4DYCF45 4DZCF45 4EACF45 4EBCF45 4EDCF45 4EECF45 4EFCF45 4EGCF45 4EHCF45 4EJCF45 4ELCF45 4ENCF45 4EPCF45 4ERCF45 4ESCF45 4EWCF45 4EXCF45 4EYCF45 4FACF45 4FBCF45 4FDCF45 4FECF45 4FFCF45 4FGCF45 4FHCF45 4FJCF45 4HACF45 4HBCF45 4HDCF45 4HECF45 4HFCF45 4HGCF45 4HHCF45 4HJCF45 4HLCF45 4HNCF45 4HPCF45 4HRCF45 4HSCF45 4HTCF45 4HWCF45 4HYCF45 4LACF45 4LBCF45 4LDCF45 4LECF45 4LFCF45 4LGCF45 4LHCF45 4LJCF45 4LLCF45 4LNCF45 4LPCF45 4LRCF45 4LSCF45 4LTCF45 4LUCF45 4LWCF45 4LXCF45 4LYCF45 4NACF45 4NBCF45 4NDCF45 4NECF45 4NFCF45 4NGCF45 4NHCF45 4NJCF45 4NLCF45 4NNCF45 4NPCF45 4NRCF45 4NSCF45 4NTCF45 4NUCF45 4NWCF45 4NYCF45 4PACF45 4PBCF45 4PDCF45 4PECF45 4PFCF45 4PGCF45 4PHCF45 4PJCF45 4PLCF45 4PNCF45 4PPCF45 4PQCF45 4PRCF45 4PSCF45 4PTCF45 4PUCF45 4PWCF45 4PYCF45 4RACF45 4RBCF45 4RDCF45 4RECF45 4RGCF45 4RHCF45 4RJCF45 4RLCF45 4RNCF45 4RPCF45 4RRCF45 4RSCF45 4RTCF45 4RUCF45 4RWCF45 4RXCF45 4SACF45 4SBCF45 4SDCF45 4SECF45 4SFCF45 4SHCF45 4SNCF45 4SPCF45 4SRCF45 4SSCF45 4STCF45 4SUCF45 4SWCF45 4SYCF45 4TACF45 4TBCF45 4TDCF45 4TECF45 4TFCF45 4TGCF45 4THCF45 4TJCF45 4TLCF45 4TNCF45 4TPCF45 4TQCF45 4TRCF45 4TTCF45 4TUCF45 4TXCF45 4TYCF45 4UACF45 4UBCF45 4UDCF45 4UECF45 4UFCF45 4UGCF45 4UHCF45 4UJCF45 4ULCF45 4UNCF45 4UPCF45 4UQCF45 4URCF45 4UTCF45 4UUCF45 4UWCF45 4UYCF45 4XACF45 4XZCF45 4YACF45 4YBCF45 4YDCF45 4YECF45 4YFCF45 4YGCF45 4YHCF45 4YLCF45 4YNCF45 4YPCF45 4YRCF45 4YSCF45 4YTCF45 4YUCF45 4YWCF45 4YXCF45 4YY

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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