BN18 postcode district: Yapton and around, West Sussex

BN18 is a postcode district in West Sussex, with 588 postcodes in use in 3 sectors. It has postcodes in Yapton, Arundel, Walberton and 2 more places. It is split between 3 councils: Arun (558 postcodes), Horsham (29) and Chichester (1).

Postcodes in use: 588
Sectors: 3
Councils: 3 councils
Places: 5 places

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

Every postcode in BN18, and which are new since 2020

New since 2020: 116
In use before 2020: 472
Outline: where 5 or more new postcodes since 2020 lie together

Of the 588 postcodes in BN18 that ONS places, 116 are new since 2020 and 472 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. A dashed outline shows where 5 or more lie within 160 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 50.8455, longitude -0.5904. 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; when each came into use: the same directory; 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 5 newest postcodes

BN18 0ZPJuly 2026 BN18 0TPJune 2026 BN18 0TUMarch 2026 BN18 0ZQMarch 2026 BN18 9FNJanuary 2026

Where the new postcodes lie together

23 new postcodes since 2020, outlined on the map. BN18 0UF, is the newest of them.
22 new postcodes since 2020, outlined on the map. BN18 0ZP, is the newest of them.
21 new postcodes since 2020, outlined on the map. BN18 0ZX, is the newest of them.
19 new postcodes since 2020, outlined on the map. BN18 0UH, is the newest of them.
8 new postcodes since 2020, outlined on the map. BN18 0GN, is the newest of them.
6 new postcodes since 2020, outlined on the map. BN18 8EB, is the newest of them.

What broadband can you get in BN18?

Ofcom reports on 564 of the 588 postcodes in BN18. At 325 of them every home and business can get gigabit broadband, and at 5 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit325 of 564

Postcodes where every home can get superfast490 of 564

Postcodes where some cannot get decent broadband5 of 564

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 BN18 at risk of flooding?

79 of the 588 postcodes in BN18 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 614 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 79 of 588 postcodes High: 337Medium: 277Low: 272Very low: 43

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 BN18?

Homes in BN18 sold for a typical £395,000 in the 12 months to August 2026, across 220 sales, up 1.3% on the 12 months before, HM Land Registry's figures show.

£395,000 typical price, the 12 months to August 2026

£389,995 12 months to August 2025

▲ up 1.3% on the 12 months before

Detached £510,000 80 sales
Semi-detached £358,000 63 sales
Terraced £332,500 56 sales
Flat or maisonette £237,000 21 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