Postcode district report · August 2026

BN18, Arun

BN18 is the 2nd Hapiest of Arun's 7 postcode districts on the HPAI Swatch, which compares them with each other on prices, how the market is moving, energy efficiency and transport.

Homes sold
179
in the 12 months to August 2026
Median price
£385,000
+5.5% on the year before
Price per m²
£4,647
median, homes with an EPC
Flats
11%
of homes sold

BN18 on the HPAI Swatch

Each tile ranks BN18 against the other postcode districts of Arun.

Price per m²£4,647/m² 2nd of 7
Price change+5.5% 2nd of 7
Sales a year179 a year 5th of 7
Sales change-21.9% 6th of 7
Energy efficiency70 EPC score 3rd of 7
Carbon3.1 t CO₂ a home 4th of 7
Station nearby1.2 km 4th of 6
Yellow the best in Arun Green above average Blue below average Purple weakest in Arun

Yellow is Hapi: the more yellow, the better BN18 compares with the rest of Arun. These colours compare postcode districts within Arun; Arun's own Swatch compares it with areas across England and Wales.

Arun's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 PO20 65£365,000 +5.8%
2 BN18 179£385,000 +5.5%
3 BN16 470£380,000 +0.0%
4 PO22 451£335,000 -4.3%
5 BN17 400£285,000 -8.1%
6 PO21 508£305,000 -3.9%
7 BN12 80£475,000 -8.2%

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About these figures

Price per m²
Median price per square metre of homes sold in the last 12 months (homes with an EPC).
Price change
Median price in the last 12 months against the 12 months before.
Sales a year
Open-market sales in the last 12 months. More sales means a deeper, easier market.
Sales change
Sales in the 12 months to three months ago against the year before. The newest months are left out: Land Registry registers sales late.
Energy efficiency
Average EPC energy efficiency score of homes sold (higher is more efficient).
Carbon
Average carbon emissions of homes sold, tonnes a year. Lower is better.
Station nearby
Median distance from homes sold to the nearest railway station. Closer is better.

Open-market sales from HM Land Registry Price Paid Data in the 12 months to August 2026 (homes in Arun only); price per m², energy and carbon from the homes sold that have an Energy Performance Certificate. Postcode districts with fewer than 20 sales a year in Arun aren't ranked.