Postcode district report · August 2026

PO21, Arun

PO21 is the 6th 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
508
in the 12 months to August 2026
Median price
£305,000
-3.9% on the year before
Price per m²
£3,455
median, homes with an EPC
Flats
29%
of homes sold

PO21 on the HPAI Swatch

Each tile ranks PO21 against the other postcode districts of Arun.

Price per m²£3,455/m² 6th of 7
Price change-3.9% 4th of 7
Sales a year508 a year 1st of 7
Sales change-18.0% 5th of 7
Energy efficiency67 EPC score 5th of 7
Carbon3.2 t CO₂ a home 5th of 7
Station nearby1.7 km 5th 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 PO21 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%

Estate agents: the local partner spot is open in PO21. Find out more

Thinking of buying or selling in PO21?
Get an evidence-based valuation of any home in a minute.
Value a home in PO21

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.