BN42 postcode district: Southwick and around

BN42 is a postcode district mostly in West Sussex, with 219 postcodes in use in 1 sector. It has postcodes in Southwick and Brighton and Hove. It is split between 2 councils: Adur (218 postcodes) and Brighton and Hove (1). 218 are in West Sussex. ONS lists no county for the other 1.

Postcodes in use
219
Sectors
1
Councils
2 councils
Places
2 places

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

Every postcode in BN42, by flood risk

Map of every postcode in BN42, by flood risk Of the 219 postcodes in BN42 that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Southwick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. BN42 4AA: not on the flood risk listBN42 4AB: not on the flood risk listBN42 4AD: not on the flood risk listBN42 4AE: not on the flood risk listBN42 4AF: not on the flood risk listBN42 4AG: not on the flood risk listBN42 4AJ: not on the flood risk listBN42 4AL: not on the flood risk listBN42 4AN: not on the flood risk listBN42 4AP: not on the flood risk listBN42 4AQ: not on the flood risk listBN42 4AR: not on the flood risk listBN42 4AS: not on the flood risk listBN42 4AT: not on the flood risk listBN42 4AU: not on the flood risk listBN42 4AX: not on the flood risk listBN42 4AY: not on the flood risk listBN42 4AZ: not on the flood risk listBN42 4BA: not on the flood risk listBN42 4BB: not on the flood risk listBN42 4BF: not on the flood risk listBN42 4BR: not on the flood risk listBN42 4BS: not on the flood risk listBN42 4BT: not on the flood risk listBN42 4BU: not on the flood risk listBN42 4BX: not on the flood risk listBN42 4BY: not on the flood risk listBN42 4BZ: not on the flood risk listBN42 4DA: not on the flood risk listBN42 4DB: not on the flood risk listBN42 4DD: not on the flood risk listBN42 4DE: not on the flood risk listBN42 4DF: not on the flood risk listBN42 4DG: not on the flood risk listBN42 4DJ: not on the flood risk listBN42 4DL: not on the flood risk listBN42 4DQ: not on the flood risk listBN42 4DR: not on the flood risk listBN42 4DS: not on the flood risk listBN42 4DT: not on the flood risk listBN42 4DU: not on the flood risk listBN42 4DW: not on the flood risk listBN42 4DX: not on the flood risk listBN42 4DY: not on the flood risk listBN42 4DZ: not on the flood risk listBN42 4ED: not on the flood risk listBN42 4EP: not on the flood risk listBN42 4FB: not on the flood risk listBN42 4FJ: not on the flood risk listBN42 4FL: not on the flood risk listBN42 4FN: not on the flood risk listBN42 4FP: not on the flood risk listBN42 4FR: not on the flood risk listBN42 4FS: not on the flood risk listBN42 4FT: not on the flood risk listBN42 4FU: not on the flood risk listBN42 4FW: not on the flood risk listBN42 4FX: not on the flood risk listBN42 4FY: not on the flood risk listBN42 4FZ: not on the flood risk listBN42 4GA: not on the flood risk listBN42 4GB: not on the flood risk listBN42 4GD: not on the flood risk listBN42 4GE: not on the flood risk listBN42 4GF: not on the flood risk listBN42 4GG: not on the flood risk listBN42 4GH: not on the flood risk listBN42 4GJ: not on the flood risk listBN42 4GR: not on the flood risk listBN42 4GS: not on the flood risk listBN42 4HA: not on the flood risk listBN42 4HB: not on the flood risk listBN42 4HD: not on the flood risk listBN42 4HE: not on the flood risk listBN42 4HF: not on the flood risk listBN42 4HG: not on the flood risk listBN42 4HH: not on the flood risk listBN42 4HJ: not on the flood risk listBN42 4HL: not on the flood risk listBN42 4HN: not on the flood risk listBN42 4HP: not on the flood risk listBN42 4HQ: not on the flood risk listBN42 4HR: not on the flood risk listBN42 4HS: not on the flood risk listBN42 4HT: not on the flood risk listBN42 4HU: not on the flood risk listBN42 4HW: not on the flood risk listBN42 4JD: not on the flood risk listBN42 4LA: not on the flood risk listBN42 4LB: not on the flood risk listBN42 4LD: not on the flood risk listBN42 4LE: not on the flood risk listBN42 4LF: not on the flood risk listBN42 4LG: not on the flood risk listBN42 4LH: not on the flood risk listBN42 4LJ: not on the flood risk listBN42 4LL: not on the flood risk listBN42 4LN: not on the flood risk listBN42 4LP: not on the flood risk listBN42 4LQ: not on the flood risk listBN42 4LR: not on the flood risk listBN42 4LS: not on the flood risk listBN42 4LT: not on the flood risk listBN42 4NA: not on the flood risk listBN42 4NB: not on the flood risk listBN42 4ND: not on the flood risk listBN42 4NE: not on the flood risk listBN42 4NF: not on the flood risk listBN42 4NG: not on the flood risk listBN42 4NH: not on the flood risk listBN42 4NJ: not on the flood risk listBN42 4NL: not on the flood risk listBN42 4NN: not on the flood risk listBN42 4NP: not on the flood risk listBN42 4NQ: not on the flood risk listBN42 4NR: not on the flood risk listBN42 4NS: not on the flood risk listBN42 4NT: not on the flood risk listBN42 4NU: not on the flood risk listBN42 4NW: not on the flood risk listBN42 4NX: not on the flood risk listBN42 4NY: not on the flood risk listBN42 4PQ: not on the flood risk listBN42 4PR: not on the flood risk listBN42 4PS: not on the flood risk listBN42 4PT: not on the flood risk listBN42 4PU: not on the flood risk listBN42 4QB: not on the flood risk listBN42 4QD: not on the flood risk listBN42 4QE: not on the flood risk listBN42 4QF: not on the flood risk listBN42 4QG: not on the flood risk listBN42 4QH: not on the flood risk listBN42 4QJ: not on the flood risk listBN42 4QL: not on the flood risk listBN42 4QN: not on the flood risk listBN42 4QP: not on the flood risk listBN42 4QQ: not on the flood risk listBN42 4QR: not on the flood risk listBN42 4QS: not on the flood risk listBN42 4QT: not on the flood risk listBN42 4QU: not on the flood risk listBN42 4QW: not on the flood risk listBN42 4RB: not on the flood risk listBN42 4RD: not on the flood risk listBN42 4RE: not on the flood risk listBN42 4RF: not on the flood risk listBN42 4RG: not on the flood risk listBN42 4RH: not on the flood risk listBN42 4RJ: not on the flood risk listBN42 4RL: not on the flood risk listBN42 4RN: not on the flood risk listBN42 4RP: not on the flood risk listBN42 4RQ: not on the flood risk listBN42 4RR: not on the flood risk listBN42 4RS: not on the flood risk listBN42 4RT: not on the flood risk listBN42 4RU: not on the flood risk listBN42 4RW: not on the flood risk listBN42 4RX: not on the flood risk listBN42 4RY: not on the flood risk listBN42 4SJ: not on the flood risk listBN42 4SL: not on the flood risk listBN42 4SN: not on the flood risk listBN42 4SP: not on the flood risk listBN42 4SQ: not on the flood risk listBN42 4SR: not on the flood risk listBN42 4TA: not on the flood risk listBN42 4TB: not on the flood risk listBN42 4TE: not on the flood risk listBN42 4TF: not on the flood risk listBN42 4TG: not on the flood risk listBN42 4TH: not on the flood risk listBN42 4TJ: not on the flood risk listBN42 4TL: not on the flood risk listBN42 4TN: not on the flood risk listBN42 4TP: not on the flood risk listBN42 4TQ: not on the flood risk listBN42 4TR: not on the flood risk listBN42 4TS: not on the flood risk listBN42 4TT: not on the flood risk listBN42 4TU: not on the flood risk listBN42 4TW: not on the flood risk listBN42 4TX: not on the flood risk listBN42 4TY: not on the flood risk listBN42 4TZ: not on the flood risk listBN42 4WA: not on the flood risk listBN42 4WB: not on the flood risk listBN42 4WD: not on the flood risk listBN42 4WE: not on the flood risk listBN42 4WF: not on the flood risk listBN42 4WG: not on the flood risk listBN42 4WH: not on the flood risk listBN42 4WJ: not on the flood risk listBN42 4WL: not on the flood risk listBN42 4WN: not on the flood risk listBN42 4WP: not on the flood risk listBN42 4WQ: not on the flood risk listBN42 4YA: not on the flood risk listBN42 4YB: not on the flood risk listBN42 4YD: not on the flood risk listBN42 4YE: not on the flood risk listBN42 4YF: not on the flood risk listBN42 4YG: not on the flood risk listBN42 4YH: not on the flood risk listBN42 4YJ: not on the flood risk listBN42 4YL: not on the flood risk listBN42 4YN: not on the flood risk listBN42 4YP: not on the flood risk listBN42 4YQ: not on the flood risk listBN42 4AW: low flood risk at worstBN42 4BW: low flood risk at worstBN42 4DH: low flood risk at worstBN42 4DN: low flood risk at worstBN42 4EG: low flood risk at worstBN42 4DP: medium flood risk at worstBN42 4EN: medium flood risk at worst Southwick Map of every postcode in BN42, by flood risk Of the 219 postcodes in BN42 that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Southwick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Southwick
  • A home or business at high risk: 0
  • At medium risk at worst: 2
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 212

Of the 219 postcodes in BN42 that ONS places, 2 are at medium risk at worst, 5 are at low risk at worst and 212 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.

The middle of its postcodes: latitude 50.8376, longitude -0.2347. 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 medium risk at worst

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

BN42 4DP7 at medium riskBN42 4EN3 at medium risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

BN42 4XZ

What broadband can you get in BN42?

Ofcom reports on 215 of the 219 postcodes in BN42. At 192 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit192 of 215
Postcodes where every home can get superfast208 of 215

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 BN42 at risk of flooding?

7 of the 219 postcodes in BN42 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 10 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 7 of 219 postcodes Medium: 10Low: 17Very low: 1

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 BN42?

Homes in BN42 sold for a typical £450,000 in the 12 months to August 2026, across 107 sales, up 5.9% on the 12 months before, HM Land Registry's figures show.

£450,000 typical price, the 12 months to August 2026
£425,000 12 months to August 2025
▲ up 5.9% on the 12 months before
  • Detached £480,500 22 sales
  • Semi-detached £475,000 53 sales
  • Terraced £425,000 23 sales
  • Flat or maisonette £270,000 9 sales

Each bar is that kind's typical price, against the most expensive kind here.

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 BN42

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

BN42 4219 postcodes
UK postcode format explained

Places in BN42

Towns and villages with postcodes in BN42, and how many each has here.

Southwick postcodes,218Brighton and Hove postcodes,1

Who covers BN42

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

  • East Worthing and Shoreham218
  • Hove and Portslade1

Police force areas

  • Sussex219

Next to BN42

BN41 postcode district BN43 postcode district All BN districts Southwick postcodes

"Next to" is by number: the districts before and after BN42 in the BN area.

Check a postcode

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