W4 3 postcode sector in the W4 district

W4 3 is a sector of the W4 district: every postcode that starts W4 3. It has 250 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 W4 3 sector, by flood risk

Map of every postcode in the W4 3 sector, by flood risk Of the 250 postcodes in the W4 3 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst, 119 are at very low risk only and 124 are not on the Environment Agency's at-risk list. Places named: Chiswick Riverside, Chiswick Homefields. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A4 W4 3AA: not on the flood risk listW4 3AD: not on the flood risk listW4 3AE: not on the flood risk listW4 3AF: not on the flood risk listW4 3AG: not on the flood risk listW4 3AH: not on the flood risk listW4 3AL: not on the flood risk listW4 3AP: not on the flood risk listW4 3AQ: not on the flood risk listW4 3AR: not on the flood risk listW4 3AS: not on the flood risk listW4 3AT: not on the flood risk listW4 3AU: not on the flood risk listW4 3AW: not on the flood risk listW4 3AY: not on the flood risk listW4 3AZ: not on the flood risk listW4 3BB: not on the flood risk listW4 3BD: not on the flood risk listW4 3BE: not on the flood risk listW4 3BF: not on the flood risk listW4 3BG: not on the flood risk listW4 3BH: not on the flood risk listW4 3BJ: not on the flood risk listW4 3BL: not on the flood risk listW4 3BN: not on the flood risk listW4 3BP: not on the flood risk listW4 3BQ: not on the flood risk listW4 3BS: not on the flood risk listW4 3BT: not on the flood risk listW4 3BU: not on the flood risk listW4 3BW: not on the flood risk listW4 3DA: not on the flood risk listW4 3DB: not on the flood risk listW4 3DD: not on the flood risk listW4 3DE: not on the flood risk listW4 3DH: not on the flood risk listW4 3DJ: not on the flood risk listW4 3DL: not on the flood risk listW4 3DN: not on the flood risk listW4 3DU: not on the flood risk listW4 3EA: not on the flood risk listW4 3ED: not on the flood risk listW4 3EH: not on the flood risk listW4 3EL: not on the flood risk listW4 3EP: not on the flood risk listW4 3EW: not on the flood risk listW4 3EX: not on the flood risk listW4 3HD: not on the flood risk listW4 3HJ: not on the flood risk listW4 3HN: not on the flood risk listW4 3HP: not on the flood risk listW4 3HR: not on the flood risk listW4 3HS: not on the flood risk listW4 3HT: not on the flood risk listW4 3HU: not on the flood risk listW4 3HW: not on the flood risk listW4 3HX: not on the flood risk listW4 3JD: not on the flood risk listW4 3JE: not on the flood risk listW4 3JG: not on the flood risk listW4 3JH: not on the flood risk listW4 3JJ: not on the flood risk listW4 3JN: not on the flood risk listW4 3JQ: not on the flood risk listW4 3JU: not on the flood risk listW4 3JX: not on the flood risk listW4 3LA: not on the flood risk listW4 3LB: not on the flood risk listW4 3LD: not on the flood risk listW4 3LQ: not on the flood risk listW4 3LW: not on the flood risk listW4 3NG: not on the flood risk listW4 3NH: not on the flood risk listW4 3NJ: not on the flood risk listW4 3NL: not on the flood risk listW4 3NN: not on the flood risk listW4 3NQ: not on the flood risk listW4 3NR: not on the flood risk listW4 3NS: not on the flood risk listW4 3NT: not on the flood risk listW4 3NX: not on the flood risk listW4 3PG: not on the flood risk listW4 3PR: not on the flood risk listW4 3PT: not on the flood risk listW4 3PU: not on the flood risk listW4 3PW: not on the flood risk listW4 3QX: not on the flood risk listW4 3RE: not on the flood risk listW4 3RJ: not on the flood risk listW4 3RN: not on the flood risk listW4 3RQ: not on the flood risk listW4 3RR: not on the flood risk listW4 3RS: not on the flood risk listW4 3RT: not on the flood risk listW4 3RU: not on the flood risk listW4 3RY: not on the flood risk listW4 3RZ: not on the flood risk listW4 3SA: not on the flood risk listW4 3SB: not on the flood risk listW4 3SD: not on the flood risk listW4 3SE: not on the flood risk listW4 3SF: not on the flood risk listW4 3SG: not on the flood risk listW4 3SH: not on the flood risk listW4 3SJ: not on the flood risk listW4 3SQ: not on the flood risk listW4 3SU: not on the flood risk listW4 3TH: not on the flood risk listW4 3TL: not on the flood risk listW4 3TQ: not on the flood risk listW4 3TT: not on the flood risk listW4 3TX: not on the flood risk listW4 3UA: not on the flood risk listW4 3UB: not on the flood risk listW4 3UE: not on the flood risk listW4 3UF: not on the flood risk listW4 3UG: not on the flood risk listW4 3UQ: not on the flood risk listW4 3ZU: not on the flood risk listW4 3AB: very low flood risk onlyW4 3AJ: very low flood risk onlyW4 3BA: very low flood risk onlyW4 3BX: very low flood risk onlyW4 3BY: very low flood risk onlyW4 3BZ: very low flood risk onlyW4 3DF: very low flood risk onlyW4 3DG: very low flood risk onlyW4 3DP: very low flood risk onlyW4 3DQ: very low flood risk onlyW4 3DR: very low flood risk onlyW4 3DS: very low flood risk onlyW4 3DT: very low flood risk onlyW4 3DX: very low flood risk onlyW4 3DY: very low flood risk onlyW4 3DZ: very low flood risk onlyW4 3EB: very low flood risk onlyW4 3EE: very low flood risk onlyW4 3EF: very low flood risk onlyW4 3EG: very low flood risk onlyW4 3EJ: very low flood risk onlyW4 3EN: very low flood risk onlyW4 3EQ: very low flood risk onlyW4 3ER: very low flood risk onlyW4 3ES: very low flood risk onlyW4 3ET: very low flood risk onlyW4 3EU: very low flood risk onlyW4 3EY: very low flood risk onlyW4 3HA: very low flood risk onlyW4 3HB: very low flood risk onlyW4 3HF: very low flood risk onlyW4 3HG: very low flood risk onlyW4 3HH: very low flood risk onlyW4 3HL: very low flood risk onlyW4 3HQ: very low flood risk onlyW4 3HY: very low flood risk onlyW4 3HZ: very low flood risk onlyW4 3JA: very low flood risk onlyW4 3JB: very low flood risk onlyW4 3JF: very low flood risk onlyW4 3JL: very low flood risk onlyW4 3JP: very low flood risk onlyW4 3JR: very low flood risk onlyW4 3JS: very low flood risk onlyW4 3JT: very low flood risk onlyW4 3JW: very low flood risk onlyW4 3JY: very low flood risk onlyW4 3JZ: very low flood risk onlyW4 3LH: very low flood risk onlyW4 3LJ: very low flood risk onlyW4 3LL: very low flood risk onlyW4 3LN: very low flood risk onlyW4 3LP: very low flood risk onlyW4 3LR: very low flood risk onlyW4 3LS: very low flood risk onlyW4 3LT: very low flood risk onlyW4 3LU: very low flood risk onlyW4 3LX: very low flood risk onlyW4 3LY: very low flood risk onlyW4 3LZ: very low flood risk onlyW4 3NA: very low flood risk onlyW4 3NB: very low flood risk onlyW4 3ND: very low flood risk onlyW4 3NE: very low flood risk onlyW4 3NP: very low flood risk onlyW4 3NU: very low flood risk onlyW4 3NY: very low flood risk onlyW4 3PA: very low flood risk onlyW4 3PB: very low flood risk onlyW4 3PE: very low flood risk onlyW4 3PH: very low flood risk onlyW4 3PJ: very low flood risk onlyW4 3PL: very low flood risk onlyW4 3PN: very low flood risk onlyW4 3PP: very low flood risk onlyW4 3PZ: very low flood risk onlyW4 3QD: very low flood risk onlyW4 3QE: very low flood risk onlyW4 3QG: very low flood risk onlyW4 3QH: very low flood risk onlyW4 3QJ: very low flood risk onlyW4 3QL: very low flood risk onlyW4 3QN: very low flood risk onlyW4 3QP: very low flood risk onlyW4 3QR: very low flood risk onlyW4 3QS: very low flood risk onlyW4 3QT: very low flood risk onlyW4 3QU: very low flood risk onlyW4 3QW: very low flood risk onlyW4 3QY: very low flood risk onlyW4 3QZ: very low flood risk onlyW4 3RB: very low flood risk onlyW4 3RD: very low flood risk onlyW4 3RG: very low flood risk onlyW4 3RL: very low flood risk onlyW4 3RP: very low flood risk onlyW4 3SL: very low flood risk onlyW4 3SN: very low flood risk onlyW4 3SP: very low flood risk onlyW4 3SR: very low flood risk onlyW4 3SS: very low flood risk onlyW4 3ST: very low flood risk onlyW4 3SX: very low flood risk onlyW4 3SY: very low flood risk onlyW4 3SZ: very low flood risk onlyW4 3TE: very low flood risk onlyW4 3TB: very low flood risk onlyW4 3TD: very low flood risk onlyW4 3TG: very low flood risk onlyW4 3TN: very low flood risk onlyW4 3TP: very low flood risk onlyW4 3TU: very low flood risk onlyW4 3TW: very low flood risk onlyW4 3UL: very low flood risk onlyW4 3UN: very low flood risk onlyW4 3XH: very low flood risk onlyW4 3XQ: very low flood risk onlyW4 3PF: low flood risk at worstW4 3QA: low flood risk at worstW4 3UR: low flood risk at worstW4 3TS: medium flood risk at worstW4 3PD: high flood riskW4 3UJ: high flood riskW4 3UP: high flood risk Chiswick RiversideChiswick Homefields Map of every postcode in the W4 3 sector, by flood risk Of the 250 postcodes in the W4 3 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst, 119 are at very low risk only and 124 are not on the Environment Agency's at-risk list. Places named: Chiswick Riverside, Chiswick Homefields. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A316 Chiswick RiversideChiswick Homefields
  • A home or business at high risk: 3
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 119
  • Not on the at-risk list: 124

Of the 250 postcodes in the W4 3 sector that ONS places, 3 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst, 119 are at very low risk only and 124 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

The postcodes at high risk

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

W4 3UP4 at high riskW4 3UJ2 at high riskW4 3PD1 at high risk

What do homes sell for in W4 3?

Homes in W4 3 sold for a typical £825,001 in the 12 months to August 2026, across 99 sales, down 8.4% on the 12 months before, HM Land Registry's figures show.

£825,001 typical price, the 12 months to August 2026
£901,000 12 months to August 2025
▼ down 8.4% on the 12 months before
  • Detached £1,815,000 5 sales
  • Semi-detached £1,500,000 19 sales
  • Terraced £1,005,000 34 sales
  • Flat or maisonette £475,000 41 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 W4 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 W4 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.

W4 3AAW4 3ABW4 3ADW4 3AEW4 3AFW4 3AGW4 3AHW4 3AJW4 3ALW4 3ANW4 3APW4 3AQW4 3ARW4 3ASW4 3ATW4 3AUW4 3AWW4 3AYW4 3AZW4 3BAW4 3BBW4 3BDW4 3BEW4 3BFW4 3BGW4 3BHW4 3BJW4 3BLW4 3BNW4 3BPW4 3BQW4 3BSW4 3BTW4 3BUW4 3BWW4 3BXW4 3BYW4 3BZW4 3DAW4 3DBW4 3DDW4 3DEW4 3DFW4 3DGW4 3DHW4 3DJW4 3DLW4 3DNW4 3DPW4 3DQW4 3DRW4 3DSW4 3DTW4 3DUW4 3DXW4 3DYW4 3DZW4 3EAW4 3EBW4 3EDW4 3EEW4 3EFW4 3EGW4 3EHW4 3EJW4 3ELW4 3ENW4 3EPW4 3EQW4 3ERW4 3ESW4 3ETW4 3EUW4 3EWW4 3EXW4 3EYW4 3HAW4 3HBW4 3HDW4 3HFW4 3HGW4 3HHW4 3HJW4 3HLW4 3HNW4 3HPW4 3HQW4 3HRW4 3HSW4 3HTW4 3HUW4 3HWW4 3HXW4 3HYW4 3HZW4 3JAW4 3JBW4 3JDW4 3JEW4 3JFW4 3JGW4 3JHW4 3JJW4 3JLW4 3JNW4 3JPW4 3JQW4 3JRW4 3JSW4 3JTW4 3JUW4 3JWW4 3JXW4 3JYW4 3JZW4 3LAW4 3LBW4 3LDW4 3LEW4 3LFW4 3LHW4 3LJW4 3LLW4 3LNW4 3LPW4 3LQW4 3LRW4 3LSW4 3LTW4 3LUW4 3LWW4 3LXW4 3LYW4 3LZW4 3NAW4 3NBW4 3NDW4 3NEW4 3NGW4 3NHW4 3NJW4 3NLW4 3NNW4 3NPW4 3NQW4 3NRW4 3NSW4 3NTW4 3NUW4 3NXW4 3NYW4 3PAW4 3PBW4 3PDW4 3PEW4 3PFW4 3PGW4 3PHW4 3PJW4 3PLW4 3PNW4 3PPW4 3PQW4 3PRW4 3PTW4 3PUW4 3PWW4 3PZW4 3QAW4 3QDW4 3QEW4 3QGW4 3QHW4 3QJW4 3QLW4 3QNW4 3QPW4 3QRW4 3QSW4 3QTW4 3QUW4 3QWW4 3QXW4 3QYW4 3QZW4 3RBW4 3RDW4 3REW4 3RGW4 3RJW4 3RLW4 3RNW4 3RPW4 3RQW4 3RRW4 3RSW4 3RTW4 3RUW4 3RYW4 3RZW4 3SAW4 3SBW4 3SDW4 3SEW4 3SFW4 3SGW4 3SHW4 3SJW4 3SLW4 3SNW4 3SPW4 3SQW4 3SRW4 3SSW4 3STW4 3SUW4 3SXW4 3SYW4 3SZW4 3TAW4 3TBW4 3TDW4 3TEW4 3TGW4 3THW4 3TLW4 3TNW4 3TPW4 3TQW4 3TSW4 3TTW4 3TUW4 3TWW4 3TXW4 3UAW4 3UBW4 3UDW4 3UEW4 3UFW4 3UGW4 3UHW4 3UJW4 3ULW4 3UNW4 3UPW4 3UQW4 3URW4 3XHW4 3XQW4 3ZU

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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