RG18 3 postcode sector in the RG18 district

RG18 3 is a sector of the RG18 district: every postcode that starts RG18 3. It has 146 postcodes in use, 6 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 RG18 3 sector, by flood risk

Map of every postcode in the RG18 3 sector, by flood risk Of the 146 postcodes in the RG18 3 sector that ONS places, 14 have a home or business at high risk, 2 are at low risk at worst and 130 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Thatcham West, Thatcham North East. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. RG18 3AB: not on the flood risk listRG18 3AE: not on the flood risk listRG18 3AF: not on the flood risk listRG18 3AG: not on the flood risk listRG18 3AH: not on the flood risk listRG18 3AJ: not on the flood risk listRG18 3AL: not on the flood risk listRG18 3AN: not on the flood risk listRG18 3AP: not on the flood risk listRG18 3AQ: not on the flood risk listRG18 3AR: not on the flood risk listRG18 3AS: not on the flood risk listRG18 3AT: not on the flood risk listRG18 3AU: not on the flood risk listRG18 3AW: not on the flood risk listRG18 3AX: not on the flood risk listRG18 3AY: not on the flood risk listRG18 3AZ: not on the flood risk listRG18 3BA: not on the flood risk listRG18 3BB: not on the flood risk listRG18 3BD: not on the flood risk listRG18 3BF: not on the flood risk listRG18 3BJ: not on the flood risk listRG18 3BN: not on the flood risk listRG18 3BP: not on the flood risk listRG18 3BQ: not on the flood risk listRG18 3BS: not on the flood risk listRG18 3BT: not on the flood risk listRG18 3BU: not on the flood risk listRG18 3BW: not on the flood risk listRG18 3BX: not on the flood risk listRG18 3BY: not on the flood risk listRG18 3BZ: not on the flood risk listRG18 3DA: not on the flood risk listRG18 3DD: not on the flood risk listRG18 3DE: not on the flood risk listRG18 3DF: not on the flood risk listRG18 3DG: not on the flood risk listRG18 3DL: not on the flood risk listRG18 3DN: not on the flood risk listRG18 3DP: not on the flood risk listRG18 3DR: not on the flood risk listRG18 3DS: not on the flood risk listRG18 3DW: not on the flood risk listRG18 3DZ: not on the flood risk listRG18 3EA: not on the flood risk listRG18 3EB: not on the flood risk listRG18 3ED: not on the flood risk listRG18 3EE: not on the flood risk listRG18 3EF: not on the flood risk listRG18 3EG: not on the flood risk listRG18 3EH: not on the flood risk listRG18 3EN: not on the flood risk listRG18 3EP: not on the flood risk listRG18 3EQ: not on the flood risk listRG18 3ER: not on the flood risk listRG18 3ES: not on the flood risk listRG18 3ET: not on the flood risk listRG18 3EU: not on the flood risk listRG18 3EW: not on the flood risk listRG18 3EX: not on the flood risk listRG18 3EY: not on the flood risk listRG18 3EZ: not on the flood risk listRG18 3FA: not on the flood risk listRG18 3FB: not on the flood risk listRG18 3FD: not on the flood risk listRG18 3FE: not on the flood risk listRG18 3FF: not on the flood risk listRG18 3FG: not on the flood risk listRG18 3FH: not on the flood risk listRG18 3FJ: not on the flood risk listRG18 3FL: not on the flood risk listRG18 3FN: not on the flood risk listRG18 3FP: not on the flood risk listRG18 3FQ: not on the flood risk listRG18 3FR: not on the flood risk listRG18 3FS: not on the flood risk listRG18 3FT: not on the flood risk listRG18 3FU: not on the flood risk listRG18 3FW: not on the flood risk listRG18 3FX: not on the flood risk listRG18 3FY: not on the flood risk listRG18 3FZ: not on the flood risk listRG18 3GA: not on the flood risk listRG18 3GB: not on the flood risk listRG18 3GD: not on the flood risk listRG18 3GE: not on the flood risk listRG18 3GF: not on the flood risk listRG18 3GG: not on the flood risk listRG18 3GH: not on the flood risk listRG18 3GJ: not on the flood risk listRG18 3GL: not on the flood risk listRG18 3GN: not on the flood risk listRG18 3GP: not on the flood risk listRG18 3GQ: not on the flood risk listRG18 3GR: not on the flood risk listRG18 3GS: not on the flood risk listRG18 3GT: not on the flood risk listRG18 3GU: not on the flood risk listRG18 3GW: not on the flood risk listRG18 3GX: not on the flood risk listRG18 3HB: not on the flood risk listRG18 3HD: not on the flood risk listRG18 3HF: not on the flood risk listRG18 3HG: not on the flood risk listRG18 3HH: not on the flood risk listRG18 3HL: not on the flood risk listRG18 3HP: not on the flood risk listRG18 3HR: not on the flood risk listRG18 3JN: not on the flood risk listRG18 3JW: not on the flood risk listRG18 3LF: not on the flood risk listRG18 3LG: not on the flood risk listRG18 3NH: not on the flood risk listRG18 3NJ: not on the flood risk listRG18 3PD: not on the flood risk listRG18 3PG: not on the flood risk listRG18 3PJ: not on the flood risk listRG18 3QY: not on the flood risk listRG18 3QZ: not on the flood risk listRG18 3RP: not on the flood risk listRG18 3ST: not on the flood risk listRG18 3SU: not on the flood risk listRG18 3SX: not on the flood risk listRG18 3TA: not on the flood risk listRG18 3UE: not on the flood risk listRG18 3UF: not on the flood risk listRG18 3UG: not on the flood risk listRG18 3UH: not on the flood risk listRG18 3UQ: not on the flood risk listRG18 3AA: low flood risk at worstRG18 3HJ: low flood risk at worstRG18 3AD: high flood riskRG18 3BH: high flood riskRG18 3BL: high flood riskRG18 3DB: high flood riskRG18 3DH: high flood riskRG18 3DJ: high flood riskRG18 3DQ: high flood riskRG18 3DT: high flood riskRG18 3DU: high flood riskRG18 3DX: high flood riskRG18 3DY: high flood riskRG18 3EJ: high flood riskRG18 3EL: high flood riskRG18 3HA: high flood risk Thatcham WestThatcham North East 5 postcodes at high or medium risk, outlined: this goes to RG18 3BH, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in the RG18 3 sector, by flood risk Of the 146 postcodes in the RG18 3 sector that ONS places, 14 have a home or business at high risk, 2 are at low risk at worst and 130 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. 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: 14
  • At medium risk at worst: 0
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 130
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 146 postcodes in the RG18 3 sector that ONS places, 14 have a home or business at high risk, 2 are at low risk at worst and 130 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. A dashed outline shows where 5 or more lie within 160 metres of each other. It is not a boundary, and no boundary is drawn. 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

14 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

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

RG18 3DJ25 at high riskRG18 3BH8 at high riskRG18 3HA7 at high riskRG18 3DU6 at high riskRG18 3DY6 at high riskRG18 3DH5 at high riskRG18 3DX5 at high riskRG18 3BL4 at high riskRG18 3DT4 at high riskRG18 3EL4 at high riskRG18 3DB3 at high riskRG18 3DQ3 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. RG18 3BH, is the one with most homes and businesses at high risk.

What do homes sell for in RG18 3?

Homes in RG18 3 sold for a typical £375,000 in the 12 months to August 2026, across 81 sales, up 3.7% on the 12 months before, HM Land Registry's figures show.

£375,000 typical price, the 12 months to August 2026
£361,500 12 months to August 2025
▲ up 3.7% on the 12 months before
  • Detached £475,375 20 sales
  • Semi-detached £382,500 33 sales
  • Terraced £314,000 20 sales
  • Flat or maisonette £215,000 8 sales

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 3. 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 3

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 3AARG18 3ABRG18 3ADRG18 3AERG18 3AFRG18 3AGRG18 3AHRG18 3AJRG18 3ALRG18 3ANRG18 3APRG18 3AQRG18 3ARRG18 3ASRG18 3ATRG18 3AURG18 3AWRG18 3AXRG18 3AYRG18 3AZRG18 3BARG18 3BBRG18 3BDRG18 3BFRG18 3BHRG18 3BJRG18 3BLRG18 3BNRG18 3BPRG18 3BQRG18 3BSRG18 3BTRG18 3BURG18 3BWRG18 3BXRG18 3BYRG18 3BZRG18 3DARG18 3DBRG18 3DDRG18 3DERG18 3DFRG18 3DGRG18 3DHRG18 3DJRG18 3DLRG18 3DNRG18 3DPRG18 3DQRG18 3DRRG18 3DSRG18 3DTRG18 3DURG18 3DWRG18 3DXRG18 3DYRG18 3DZRG18 3EARG18 3EBRG18 3EDRG18 3EERG18 3EFRG18 3EGRG18 3EHRG18 3EJRG18 3ELRG18 3ENRG18 3EPRG18 3EQRG18 3ERRG18 3ESRG18 3ETRG18 3EURG18 3EWRG18 3EXRG18 3EYRG18 3EZRG18 3FARG18 3FBRG18 3FDRG18 3FERG18 3FFRG18 3FGRG18 3FHRG18 3FJRG18 3FLRG18 3FNRG18 3FPRG18 3FQRG18 3FRRG18 3FSRG18 3FTRG18 3FURG18 3FWRG18 3FXRG18 3FYRG18 3FZRG18 3GARG18 3GBRG18 3GDRG18 3GERG18 3GFRG18 3GGRG18 3GHRG18 3GJRG18 3GLRG18 3GNRG18 3GPRG18 3GQRG18 3GRRG18 3GSRG18 3GTRG18 3GURG18 3GWRG18 3GXRG18 3HARG18 3HBRG18 3HDRG18 3HFRG18 3HGRG18 3HHRG18 3HJRG18 3HLRG18 3HPRG18 3HRRG18 3JNRG18 3JWRG18 3LFRG18 3LGRG18 3NHRG18 3NJRG18 3PDRG18 3PGRG18 3PJRG18 3QYRG18 3QZRG18 3RPRG18 3STRG18 3SURG18 3SXRG18 3TARG18 3UERG18 3UFRG18 3UGRG18 3UHRG18 3UQ

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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