M4 1 postcode sector in the M4 district

M4 1 is a sector of the M4 district: every postcode that starts M4 1. It has 80 postcodes in use, 2 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 M4 1 sector, by flood risk

Map of every postcode in the M4 1 sector, by flood risk Of the 80 postcodes in the M4 1 sector that ONS places, 80 are not on the Environment Agency's at-risk list. Places named: Piccadilly. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. M4 1AA: not on the flood risk listM4 1AB: not on the flood risk listM4 1AD: not on the flood risk listM4 1AE: not on the flood risk listM4 1AJ: not on the flood risk listM4 1AZ: not on the flood risk listM4 1BA: not on the flood risk listM4 1BB: not on the flood risk listM4 1BD: not on the flood risk listM4 1BG: not on the flood risk listM4 1BH: not on the flood risk listM4 1BJ: not on the flood risk listM4 1DG: not on the flood risk listM4 1DH: not on the flood risk listM4 1DN: not on the flood risk listM4 1DW: not on the flood risk listM4 1DY: not on the flood risk listM4 1DZ: not on the flood risk listM4 1EA: not on the flood risk listM4 1EB: not on the flood risk listM4 1ED: not on the flood risk listM4 1EF: not on the flood risk listM4 1EG: not on the flood risk listM4 1EH: not on the flood risk listM4 1EQ: not on the flood risk listM4 1ER: not on the flood risk listM4 1ES: not on the flood risk listM4 1ET: not on the flood risk listM4 1EU: not on the flood risk listM4 1EW: not on the flood risk listM4 1EX: not on the flood risk listM4 1EY: not on the flood risk listM4 1EZ: not on the flood risk listM4 1FR: not on the flood risk listM4 1FS: not on the flood risk listM4 1HG: not on the flood risk listM4 1HN: not on the flood risk listM4 1HP: not on the flood risk listM4 1HQ: not on the flood risk listM4 1HS: not on the flood risk listM4 1HT: not on the flood risk listM4 1HW: not on the flood risk listM4 1JZ: not on the flood risk listM4 1LA: not on the flood risk listM4 1LD: not on the flood risk listM4 1LE: not on the flood risk listM4 1LF: not on the flood risk listM4 1LG: not on the flood risk listM4 1LJ: not on the flood risk listM4 1LN: not on the flood risk listM4 1LP: not on the flood risk listM4 1LQ: not on the flood risk listM4 1LR: not on the flood risk listM4 1LS: not on the flood risk listM4 1LT: not on the flood risk listM4 1LU: not on the flood risk listM4 1LW: not on the flood risk listM4 1LY: not on the flood risk listM4 1LZ: not on the flood risk listM4 1NA: not on the flood risk listM4 1NB: not on the flood risk listM4 1PB: not on the flood risk listM4 1PD: not on the flood risk listM4 1PE: not on the flood risk listM4 1PH: not on the flood risk listM4 1PN: not on the flood risk listM4 1PP: not on the flood risk listM4 1PQ: not on the flood risk listM4 1PT: not on the flood risk listM4 1PW: not on the flood risk listM4 1PY: not on the flood risk listM4 1QB: not on the flood risk listM4 1QF: not on the flood risk listM4 1SH: not on the flood risk list Piccadilly Map of every postcode in the M4 1 sector, by flood risk Of the 80 postcodes in the M4 1 sector that ONS places, 80 are not on the Environment Agency's at-risk list. Places named: Piccadilly. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Piccadilly
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 80

Of the 80 postcodes in the M4 1 sector that ONS places, 80 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 M4 1?

Homes in M4 1 sold for a typical £195,000 in the 12 months to August 2026, across 35 sales, down 13.3% on the 12 months before, HM Land Registry's figures show.

£195,000 typical price, the 12 months to August 2026
£225,000 12 months to August 2025
▼ down 13.3% on the 12 months before
  • Flat or maisonette £195,000 35 sales

Standard sales of homes at market value at the postcodes that start M4 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 M4 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.

M4 1AAM4 1ABM4 1ADM4 1AEM4 1AFM4 1AGM4 1AJM4 1AZM4 1BAM4 1BBM4 1BDM4 1BEM4 1BFM4 1BGM4 1BHM4 1BJM4 1DGM4 1DHM4 1DNM4 1DWM4 1DYM4 1DZM4 1EAM4 1EBM4 1EDM4 1EFM4 1EGM4 1EHM4 1EQM4 1ERM4 1ESM4 1ETM4 1EUM4 1EWM4 1EXM4 1EYM4 1EZM4 1FRM4 1FSM4 1HGM4 1HNM4 1HPM4 1HQM4 1HSM4 1HTM4 1HWM4 1JZM4 1LAM4 1LDM4 1LEM4 1LFM4 1LGM4 1LJM4 1LNM4 1LPM4 1LQM4 1LRM4 1LSM4 1LTM4 1LUM4 1LWM4 1LXM4 1LYM4 1LZM4 1NAM4 1NBM4 1PBM4 1PDM4 1PEM4 1PHM4 1PNM4 1PPM4 1PQM4 1PRM4 1PTM4 1PWM4 1PYM4 1QBM4 1QFM4 1SH

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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