RM1 1 postcode sector in the RM1 district

RM1 1 is a sector of the RM1 district: every postcode that starts RM1 1. It has 90 postcodes in use, 11 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 RM1 1 sector, by flood risk

Map of every postcode in the RM1 1 sector, by flood risk Of the 90 postcodes in the RM1 1 sector that ONS places, 34 are at low risk at worst and 56 are not on the Environment Agency's at-risk list. Places named: St Edward's, St Alban's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A1251 RM1 1AA: not on the flood risk listRM1 1AH: not on the flood risk listRM1 1AJ: not on the flood risk listRM1 1AL: not on the flood risk listRM1 1BW: not on the flood risk listRM1 1BY: not on the flood risk listRM1 1DA: not on the flood risk listRM1 1DB: not on the flood risk listRM1 1DD: not on the flood risk listRM1 1DH: not on the flood risk listRM1 1DL: not on the flood risk listRM1 1DQ: not on the flood risk listRM1 1DR: not on the flood risk listRM1 1DS: not on the flood risk listRM1 1DY: not on the flood risk listRM1 1DZ: not on the flood risk listRM1 1EF: not on the flood risk listRM1 1ER: not on the flood risk listRM1 1EU: not on the flood risk listRM1 1FA: not on the flood risk listRM1 1FD: not on the flood risk listRM1 1FE: not on the flood risk listRM1 1FG: not on the flood risk listRM1 1FH: not on the flood risk listRM1 1FJ: not on the flood risk listRM1 1HL: not on the flood risk listRM1 1NJ: not on the flood risk listRM1 1NL: not on the flood risk listRM1 1NT: not on the flood risk listRM1 1PA: not on the flood risk listRM1 1PL: not on the flood risk listRM1 1PS: not on the flood risk listRM1 1QA: not on the flood risk listRM1 1QJ: not on the flood risk listRM1 1QL: not on the flood risk listRM1 1RB: not on the flood risk listRM1 1RH: not on the flood risk listRM1 1RS: not on the flood risk listRM1 1SX: not on the flood risk listRM1 1SY: not on the flood risk listRM1 1TA: not on the flood risk listRM1 1TB: not on the flood risk listRM1 1TE: not on the flood risk listRM1 1TH: not on the flood risk listRM1 1TJ: not on the flood risk listRM1 1UP: not on the flood risk listRM1 1XJ: not on the flood risk listRM1 1XN: not on the flood risk listRM1 1AF: low flood risk at worstRM1 1AN: low flood risk at worstRM1 1AP: low flood risk at worstRM1 1AR: low flood risk at worstRM1 1AS: low flood risk at worstRM1 1AU: low flood risk at worstRM1 1BH: low flood risk at worstRM1 1BJ: low flood risk at worstRM1 1BQ: low flood risk at worstRM1 1DF: low flood risk at worstRM1 1DG: low flood risk at worstRM1 1DT: low flood risk at worstRM1 1DX: low flood risk at worstRM1 1ED: low flood risk at worstRM1 1EG: low flood risk at worstRM1 1EN: low flood risk at worstRM1 1EQ: low flood risk at worstRM1 1ES: low flood risk at worstRM1 1EW: low flood risk at worstRM1 1EY: low flood risk at worstRM1 1EZ: low flood risk at worstRM1 1HR: low flood risk at worstRM1 1JH: low flood risk at worstRM1 1JJ: low flood risk at worstRM1 1JU: low flood risk at worstRM1 1LN: low flood risk at worstRM1 1NX: low flood risk at worstRM1 1RA: low flood risk at worstRM1 1RD: low flood risk at worstRM1 1RX: low flood risk at worstRM1 1SS: low flood risk at worstRM1 1TU: low flood risk at worst St Edward'sSt Alban's Map of every postcode in the RM1 1 sector, by flood risk Of the 90 postcodes in the RM1 1 sector that ONS places, 34 are at low risk at worst and 56 are not on the Environment Agency's at-risk list. Places named: St Edward's, St Alban's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. St Edward'sSt Alban's
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 34
  • At very low risk only: 0
  • Not on the at-risk list: 56

Of the 90 postcodes in the RM1 1 sector that ONS places, 34 are at low risk at worst and 56 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. 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

What do homes sell for in RM1 1?

Homes in RM1 1 sold for a typical £217,500 in the 12 months to August 2026, across 12 sales, up 11.5% on the 12 months before, HM Land Registry's figures show.

£217,500 typical price, the 12 months to August 2026
£195,000 12 months to August 2025
▲ up 11.5% on the 12 months before
  • Semi-detached 1 sale, too few to price
  • Flat or maisonette £195,000 11 sales

Standard sales of homes at market value at the postcodes that start RM1 1. 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 RM1 1

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.

RM1 1AARM1 1AFRM1 1AHRM1 1AJRM1 1ALRM1 1ANRM1 1APRM1 1ARRM1 1ASRM1 1AURM1 1BGRM1 1BHRM1 1BJRM1 1BPRM1 1BQRM1 1BWRM1 1BYRM1 1DARM1 1DBRM1 1DDRM1 1DFRM1 1DGRM1 1DHRM1 1DLRM1 1DNRM1 1DQRM1 1DRRM1 1DSRM1 1DTRM1 1DXRM1 1DYRM1 1DZRM1 1EARM1 1EDRM1 1EFRM1 1EGRM1 1ENRM1 1EQRM1 1ERRM1 1ESRM1 1EURM1 1EWRM1 1EYRM1 1EZRM1 1FARM1 1FBRM1 1FDRM1 1FERM1 1FGRM1 1FHRM1 1FJRM1 1HLRM1 1HRRM1 1JHRM1 1JJRM1 1JLRM1 1JURM1 1LNRM1 1NJRM1 1NLRM1 1NTRM1 1NXRM1 1PARM1 1PLRM1 1PSRM1 1QARM1 1QJRM1 1QLRM1 1QXRM1 1RARM1 1RBRM1 1RDRM1 1RHRM1 1RSRM1 1RXRM1 1SSRM1 1SXRM1 1SYRM1 1TARM1 1TBRM1 1TERM1 1TFRM1 1THRM1 1TJRM1 1TRRM1 1TURM1 1UPRM1 1XJRM1 1XNRM1 1XP

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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