RG18 4 postcode sector in the RG18 district

RG18 4 is a sector of the RG18 district: every postcode that starts RG18 4. It has 99 postcodes in use.

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

Every postcode in the RG18 4 sector, by flood risk

Map of every postcode in the RG18 4 sector, by flood risk Of the 99 postcodes in the RG18 4 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 95 are not on the Environment Agency's at-risk list. Places named: Thatcham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. RG18 4AA: not on the flood risk listRG18 4AB: not on the flood risk listRG18 4AD: not on the flood risk listRG18 4AE: not on the flood risk listRG18 4AF: not on the flood risk listRG18 4BG: not on the flood risk listRG18 4BP: not on the flood risk listRG18 4BQ: not on the flood risk listRG18 4BT: not on the flood risk listRG18 4BU: not on the flood risk listRG18 4BW: not on the flood risk listRG18 4BX: not on the flood risk listRG18 4BY: not on the flood risk listRG18 4BZ: not on the flood risk listRG18 4DA: not on the flood risk listRG18 4DB: not on the flood risk listRG18 4DD: not on the flood risk listRG18 4DE: not on the flood risk listRG18 4DF: not on the flood risk listRG18 4DG: not on the flood risk listRG18 4DH: not on the flood risk listRG18 4DJ: not on the flood risk listRG18 4DL: not on the flood risk listRG18 4DN: not on the flood risk listRG18 4DP: not on the flood risk listRG18 4DQ: not on the flood risk listRG18 4DR: not on the flood risk listRG18 4DS: not on the flood risk listRG18 4DT: not on the flood risk listRG18 4DU: not on the flood risk listRG18 4DX: not on the flood risk listRG18 4DY: not on the flood risk listRG18 4DZ: not on the flood risk listRG18 4EA: not on the flood risk listRG18 4EB: not on the flood risk listRG18 4ED: not on the flood risk listRG18 4EE: not on the flood risk listRG18 4EF: not on the flood risk listRG18 4EG: not on the flood risk listRG18 4EH: not on the flood risk listRG18 4EJ: not on the flood risk listRG18 4EL: not on the flood risk listRG18 4EN: not on the flood risk listRG18 4EP: not on the flood risk listRG18 4ER: not on the flood risk listRG18 4ES: not on the flood risk listRG18 4ET: not on the flood risk listRG18 4EU: not on the flood risk listRG18 4EX: not on the flood risk listRG18 4EY: not on the flood risk listRG18 4EZ: not on the flood risk listRG18 4GE: not on the flood risk listRG18 4HB: not on the flood risk listRG18 4JP: not on the flood risk listRG18 4JS: not on the flood risk listRG18 4JU: not on the flood risk listRG18 4JW: not on the flood risk listRG18 4LA: not on the flood risk listRG18 4LB: not on the flood risk listRG18 4LD: not on the flood risk listRG18 4LE: not on the flood risk listRG18 4LG: not on the flood risk listRG18 4LH: not on the flood risk listRG18 4LJ: not on the flood risk listRG18 4LL: not on the flood risk listRG18 4LN: not on the flood risk listRG18 4LP: not on the flood risk listRG18 4LQ: not on the flood risk listRG18 4LR: not on the flood risk listRG18 4LS: not on the flood risk listRG18 4LT: not on the flood risk listRG18 4LU: not on the flood risk listRG18 4LW: not on the flood risk listRG18 4LX: not on the flood risk listRG18 4LY: not on the flood risk listRG18 4NA: not on the flood risk listRG18 4NB: not on the flood risk listRG18 4ND: not on the flood risk listRG18 4NF: not on the flood risk listRG18 4NL: not on the flood risk listRG18 4NN: not on the flood risk listRG18 4NP: not on the flood risk listRG18 4NU: not on the flood risk listRG18 4NW: not on the flood risk listRG18 4NX: not on the flood risk listRG18 4NY: not on the flood risk listRG18 4QJ: not on the flood risk listRG18 4QL: not on the flood risk listRG18 4QP: not on the flood risk listRG18 4QS: not on the flood risk listRG18 4QT: not on the flood risk listRG18 4QU: not on the flood risk listRG18 4QW: not on the flood risk listRG18 4QX: not on the flood risk listRG18 4QY: not on the flood risk listRG18 4BA: low flood risk at worstRG18 4QN: low flood risk at worstRG18 4QR: medium flood risk at worstRG18 4QH: high flood risk Thatcham Map of every postcode in the RG18 4 sector, by flood risk Of the 99 postcodes in the RG18 4 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 95 are not on the Environment Agency's at-risk list. Places named: Thatcham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Thatcham
  • A home or business at high risk: 1
  • At medium risk at worst: 1
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 95

Of the 99 postcodes in the RG18 4 sector that ONS places, 1 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 95 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.

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.

RG18 4QH1 at high risk

What do homes sell for in RG18 4?

Homes in RG18 4 sold for a typical £385,500 in the 12 months to August 2026, across 55 sales, down 1.2% on the 12 months before, HM Land Registry's figures show.

£385,500 typical price, the 12 months to August 2026
£390,000 12 months to August 2025
▼ down 1.2% on the 12 months before
  • Detached £556,625 22 sales
  • Semi-detached £340,000 19 sales
  • Terraced £381,250 10 sales
  • Flat or maisonette 4 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 RG18 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 RG18 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.

RG18 4AARG18 4ABRG18 4ADRG18 4AERG18 4AFRG18 4BARG18 4BGRG18 4BPRG18 4BQRG18 4BTRG18 4BURG18 4BWRG18 4BXRG18 4BYRG18 4BZRG18 4DARG18 4DBRG18 4DDRG18 4DERG18 4DFRG18 4DGRG18 4DHRG18 4DJRG18 4DLRG18 4DNRG18 4DPRG18 4DQRG18 4DRRG18 4DSRG18 4DTRG18 4DURG18 4DXRG18 4DYRG18 4DZRG18 4EARG18 4EBRG18 4EDRG18 4EERG18 4EFRG18 4EGRG18 4EHRG18 4EJRG18 4ELRG18 4ENRG18 4EPRG18 4ERRG18 4ESRG18 4ETRG18 4EURG18 4EXRG18 4EYRG18 4EZRG18 4GERG18 4HBRG18 4JPRG18 4JSRG18 4JURG18 4JWRG18 4LARG18 4LBRG18 4LDRG18 4LERG18 4LGRG18 4LHRG18 4LJRG18 4LLRG18 4LNRG18 4LPRG18 4LQRG18 4LRRG18 4LSRG18 4LTRG18 4LURG18 4LWRG18 4LXRG18 4LYRG18 4NARG18 4NBRG18 4NDRG18 4NFRG18 4NLRG18 4NNRG18 4NPRG18 4NURG18 4NWRG18 4NXRG18 4NYRG18 4QHRG18 4QJRG18 4QLRG18 4QNRG18 4QPRG18 4QRRG18 4QSRG18 4QTRG18 4QURG18 4QWRG18 4QXRG18 4QY

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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