RG18 postcode district: Thatcham and around, West Berkshire

RG18 is a postcode district in England, with 543 postcodes in use in 4 sectors. It has postcodes in Thatcham, Cold Ash, Hermitage and 1 more place. Its council is West Berkshire.

Postcodes in use
543
Sectors
4
Places
4 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in RG18, by flood risk

Map of every postcode in RG18, by flood risk Of the 543 postcodes in RG18 that ONS places, 16 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst and 519 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, Cold Ash, Hermitage. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. M4A34 RG18 0AA: not on the flood risk listRG18 0AB: not on the flood risk listRG18 0NF: not on the flood risk listRG18 0NG: not on the flood risk listRG18 0RR: not on the flood risk listRG18 0RS: not on the flood risk listRG18 0RT: not on the flood risk listRG18 0RU: not on the flood risk listRG18 0RX: not on the flood risk listRG18 0RY: not on the flood risk listRG18 0RZ: not on the flood risk listRG18 0SE: not on the flood risk listRG18 0SF: not on the flood risk listRG18 0SH: not on the flood risk listRG18 0SJ: not on the flood risk listRG18 0SL: not on the flood risk listRG18 0SN: not on the flood risk listRG18 0SP: not on the flood risk listRG18 0SQ: not on the flood risk listRG18 0SR: not on the flood risk listRG18 0SS: not on the flood risk listRG18 0ST: not on the flood risk listRG18 0TE: not on the flood risk listRG18 0TF: not on the flood risk listRG18 0TG: not on the flood risk listRG18 0TH: not on the flood risk listRG18 0TJ: not on the flood risk listRG18 0TL: not on the flood risk listRG18 0TN: not on the flood risk listRG18 0TP: not on the flood risk listRG18 0TQ: not on the flood risk listRG18 0TR: not on the flood risk listRG18 0TS: not on the flood risk listRG18 0TT: not on the flood risk listRG18 0TU: not on the flood risk listRG18 0TX: not on the flood risk listRG18 0UD: not on the flood risk listRG18 0UE: not on the flood risk listRG18 0UF: not on the flood risk listRG18 0UH: not on the flood risk listRG18 0UJ: not on the flood risk listRG18 0UL: not on the flood risk listRG18 0UN: not on the flood risk listRG18 0UP: not on the flood risk listRG18 0UQ: not on the flood risk listRG18 0UR: not on the flood risk listRG18 0UT: not on the flood risk listRG18 0UU: not on the flood risk listRG18 0UW: not on the flood risk listRG18 0UX: not on the flood risk listRG18 0UY: not on the flood risk listRG18 0XA: not on the flood risk listRG18 0XB: not on the flood risk listRG18 0XD: not on the flood risk listRG18 0XE: not on the flood risk listRG18 0XF: not on the flood risk listRG18 0XL: not on the flood risk listRG18 0XP: not on the flood risk listRG18 0XS: not on the flood risk listRG18 0XT: not on the flood risk listRG18 0XU: not on the flood risk listRG18 0XX: not on the flood risk listRG18 0XY: not on the flood risk listRG18 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 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 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 3DF: 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 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 3ES: not on the flood risk listRG18 3ET: not on the flood risk listRG18 3EU: 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 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 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 3FW: not on the flood risk listRG18 3FZ: 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 3GJ: 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 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 3HG: not on the flood risk listRG18 3HH: not on the flood risk listRG18 3HL: 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 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 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 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 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 4DR: 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 4ES: not on the flood risk listRG18 4ET: 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 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 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 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 4NX: not on the flood risk listRG18 4NY: not on the flood risk listRG18 4QJ: 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 4QX: not on the flood risk listRG18 9AA: not on the flood risk listRG18 9AB: not on the flood risk listRG18 9AE: not on the flood risk listRG18 9AF: not on the flood risk listRG18 9AH: not on the flood risk listRG18 9AJ: not on the flood risk listRG18 9AL: not on the flood risk listRG18 9AN: not on the flood risk listRG18 9AP: not on the flood risk listRG18 9AQ: not on the flood risk listRG18 9DG: not on the flood risk listRG18 9DH: not on the flood risk listRG18 9DJ: not on the flood risk listRG18 9DL: not on the flood risk listRG18 9DN: not on the flood risk listRG18 9DP: not on the flood risk listRG18 9DQ: not on the flood risk listRG18 9DR: not on the flood risk listRG18 9DS: not on the flood risk listRG18 9DU: not on the flood risk listRG18 9DX: not on the flood risk listRG18 9DZ: not on the flood risk listRG18 9EA: not on the flood risk listRG18 9EB: not on the flood risk listRG18 9ED: not on the flood risk listRG18 9EE: not on the flood risk listRG18 9EF: not on the flood risk listRG18 9EG: not on the flood risk listRG18 9EH: not on the flood risk listRG18 9EP: not on the flood risk listRG18 9EQ: not on the flood risk listRG18 9ER: not on the flood risk listRG18 9ES: not on the flood risk listRG18 9EU: not on the flood risk listRG18 9EW: not on the flood risk listRG18 9EY: not on the flood risk listRG18 9EZ: not on the flood risk listRG18 9HA: not on the flood risk listRG18 9HD: not on the flood risk listRG18 9HF: not on the flood risk listRG18 9HG: not on the flood risk listRG18 9HH: not on the flood risk listRG18 9HQ: not on the flood risk listRG18 9HR: not on the flood risk listRG18 9HS: not on the flood risk listRG18 9HT: not on the flood risk listRG18 9HU: not on the flood risk listRG18 9HX: not on the flood risk listRG18 9HY: not on the flood risk listRG18 9HZ: not on the flood risk listRG18 9JA: not on the flood risk listRG18 9JB: not on the flood risk listRG18 9JD: not on the flood risk listRG18 9JE: not on the flood risk listRG18 9JF: not on the flood risk listRG18 9JG: not on the flood risk listRG18 9JH: not on the flood risk listRG18 9JJ: not on the flood risk listRG18 9JL: not on the flood risk listRG18 9JN: not on the flood risk listRG18 9JP: not on the flood risk listRG18 9JQ: not on the flood risk listRG18 9JR: not on the flood risk listRG18 9JT: not on the flood risk listRG18 9JU: not on the flood risk listRG18 9JW: not on the flood risk listRG18 9JX: not on the flood risk listRG18 9LD: not on the flood risk listRG18 9LS: not on the flood risk listRG18 9LT: not on the flood risk listRG18 9LU: not on the flood risk listRG18 9LX: not on the flood risk listRG18 9LY: not on the flood risk listRG18 9NA: not on the flood risk listRG18 9NB: not on the flood risk listRG18 9ND: not on the flood risk listRG18 9NE: not on the flood risk listRG18 9NF: not on the flood risk listRG18 9NG: not on the flood risk listRG18 9NH: not on the flood risk listRG18 9NJ: not on the flood risk listRG18 9NL: not on the flood risk listRG18 9NN: not on the flood risk listRG18 9NP: not on the flood risk listRG18 9NU: not on the flood risk listRG18 9NW: not on the flood risk listRG18 9NY: not on the flood risk listRG18 9NZ: not on the flood risk listRG18 9PA: not on the flood risk listRG18 9PB: not on the flood risk listRG18 9PD: not on the flood risk listRG18 9PE: not on the flood risk listRG18 9PF: not on the flood risk listRG18 9PH: not on the flood risk listRG18 9PL: not on the flood risk listRG18 9PN: not on the flood risk listRG18 9PP: not on the flood risk listRG18 9PQ: not on the flood risk listRG18 9PR: not on the flood risk listRG18 9PS: not on the flood risk listRG18 9PT: not on the flood risk listRG18 9PU: not on the flood risk listRG18 9PW: not on the flood risk listRG18 9PX: not on the flood risk listRG18 9PY: not on the flood risk listRG18 9PZ: not on the flood risk listRG18 9QD: not on the flood risk listRG18 9QE: not on the flood risk listRG18 9QG: not on the flood risk listRG18 9QH: not on the flood risk listRG18 9QJ: not on the flood risk listRG18 9QL: not on the flood risk listRG18 9QN: not on the flood risk listRG18 9QP: not on the flood risk listRG18 9QQ: not on the flood risk listRG18 9QR: not on the flood risk listRG18 9QS: not on the flood risk listRG18 9QT: not on the flood risk listRG18 9QW: not on the flood risk listRG18 9QX: not on the flood risk listRG18 9QZ: not on the flood risk listRG18 9RA: not on the flood risk listRG18 9RD: not on the flood risk listRG18 9RG: not on the flood risk listRG18 9RH: not on the flood risk listRG18 9RL: not on the flood risk listRG18 9RN: not on the flood risk listRG18 9RP: not on the flood risk listRG18 9RQ: not on the flood risk listRG18 9RS: not on the flood risk listRG18 9RT: not on the flood risk listRG18 9RU: not on the flood risk listRG18 9RW: not on the flood risk listRG18 9RY: not on the flood risk listRG18 9RZ: not on the flood risk listRG18 9SA: not on the flood risk listRG18 9SB: not on the flood risk listRG18 9SD: not on the flood risk listRG18 9SE: not on the flood risk listRG18 9SG: not on the flood risk listRG18 9SL: not on the flood risk listRG18 9SN: not on the flood risk listRG18 9SP: not on the flood risk listRG18 9SQ: not on the flood risk listRG18 9SR: not on the flood risk listRG18 9SS: not on the flood risk listRG18 9ST: not on the flood risk listRG18 9SU: not on the flood risk listRG18 9SW: not on the flood risk listRG18 9SX: not on the flood risk listRG18 9SY: not on the flood risk listRG18 9SZ: not on the flood risk listRG18 9TA: not on the flood risk listRG18 9TB: not on the flood risk listRG18 9TE: not on the flood risk listRG18 9TF: not on the flood risk listRG18 9TG: not on the flood risk listRG18 9TJ: not on the flood risk listRG18 9TL: not on the flood risk listRG18 9TN: not on the flood risk listRG18 9TP: not on the flood risk listRG18 9TQ: not on the flood risk listRG18 9TR: not on the flood risk listRG18 9TS: not on the flood risk listRG18 9TT: not on the flood risk listRG18 9TX: not on the flood risk listRG18 9TY: not on the flood risk listRG18 9TZ: not on the flood risk listRG18 9UA: not on the flood risk listRG18 9UB: not on the flood risk listRG18 9UD: not on the flood risk listRG18 9UE: not on the flood risk listRG18 9UF: not on the flood risk listRG18 9UG: not on the flood risk listRG18 9UH: not on the flood risk listRG18 9UJ: not on the flood risk listRG18 9UL: not on the flood risk listRG18 9UN: not on the flood risk listRG18 9UP: not on the flood risk listRG18 9UR: not on the flood risk listRG18 9UU: not on the flood risk listRG18 9UW: not on the flood risk listRG18 9UX: not on the flood risk listRG18 9UY: not on the flood risk listRG18 9WE: not on the flood risk listRG18 9WL: not on the flood risk listRG18 9WN: not on the flood risk listRG18 9WP: not on the flood risk listRG18 9WQ: not on the flood risk listRG18 9WS: not on the flood risk listRG18 9WT: not on the flood risk listRG18 9WW: not on the flood risk listRG18 9WX: not on the flood risk listRG18 9XA: not on the flood risk listRG18 9XB: not on the flood risk listRG18 9XD: not on the flood risk listRG18 9XE: not on the flood risk listRG18 9XF: not on the flood risk listRG18 9XH: not on the flood risk listRG18 9XJ: not on the flood risk listRG18 9XN: not on the flood risk listRG18 9XP: not on the flood risk listRG18 9XQ: not on the flood risk listRG18 9XR: not on the flood risk listRG18 9XS: not on the flood risk listRG18 9XT: not on the flood risk listRG18 9XU: not on the flood risk listRG18 9XW: not on the flood risk listRG18 9XX: not on the flood risk listRG18 9XZ: not on the flood risk listRG18 0TB: low flood risk at worstRG18 3AA: low flood risk at worstRG18 3HJ: low flood risk at worstRG18 4BA: low flood risk at worstRG18 4QN: low flood risk at worstRG18 9UT: low flood risk at worstRG18 4QR: medium flood risk at worstRG18 3AD: high flood riskRG18 3BH: 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 3HA: high flood riskRG18 4QH: high flood riskRG18 9UZ: high flood risk ThatchamCold AshHermitage 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 RG18, by flood risk Of the 543 postcodes in RG18 that ONS places, 16 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst and 519 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, Cold Ash, Hermitage. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. M4A34 ThatchamCold AshHermitage
  • A home or business at high risk: 16
  • At medium risk at worst: 1
  • At low risk at worst: 7
  • At very low risk only: 0
  • Not on the at-risk list: 519
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 543 postcodes in RG18 that ONS places, 16 have a home or business at high risk, 1 are at medium risk at worst, 7 are at low risk at worst and 519 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 180 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.4312, longitude -1.2605. Open this area on OpenStreetMap

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

16 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.

Where the postcodes at high or medium risk lie together

What broadband can you get in RG18?

Ofcom reports on 536 of the 543 postcodes in RG18. At 456 of them every home and business can get gigabit broadband, and at 4 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit456 of 536
Postcodes where every home can get superfast506 of 536
Postcodes where some cannot get decent broadband4 of 536

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is RG18 at risk of flooding?

24 of the 543 postcodes in RG18 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 88 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 24 of 543 postcodes High: 85Medium: 3Low: 33

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in RG18?

Homes in RG18 sold for a typical £397,975 in the 12 months to August 2026, across 190 sales, down 8.7% on the 12 months before, HM Land Registry's figures show.

£397,975 typical price, the 12 months to August 2026
12 months to August 2025
£436,000
12 months to August 2026
£397,975

▼ down 8.7% on the 12 months before

Detached£590,000 75 sales
Semi-detached£375,000 63 sales
Terraced£320,500 36 sales
Flat or maisonette£208,500 16 sales

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

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

Pick a sector, then a postcode. A sector is the district plus the next digit.

UK postcode format explained

Places in RG18

Towns and villages with postcodes in RG18, and how many each has here.

Who covers RG18

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Newbury449
  • Reading West and Mid Berkshire94

Police force areas

  • Thames Valley543

Next to RG18

"Next to" is by number: the districts before and after RG18 in the RG area.

Check a postcode

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