Postcode district report · August 2026

SM4, Merton

SM4 is the 6th Hapiest of Merton'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
218
in the 12 months to August 2026
Median price
£475,000
-7.8% on the year before
Price per m²
£6,237
median, homes with an EPC
Flats
30%
of homes sold

SM4 on the HPAI Swatch

Each tile ranks SM4 against the other postcode districts of Merton.

Price per m²£6,237/m² 5th of 7
Price change-7.8% 6th of 7
Sales a year218 a year 4th of 7
Sales change-21.5% 4th of 7
Energy efficiency66 EPC score 6th of 7
Carbon3.0 t CO₂ a home 4th of 7
Station nearby0.7 km 6th of 7
Yellow the best in Merton Green above average Blue below average Purple weakest in Merton

Yellow is Hapi: the more yellow, the better SM4 compares with the rest of Merton. These colours compare postcode districts within Merton; Merton's own Swatch compares it with areas across England and Wales.

Merton's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 SW19 694£650,000 -1.5%
2 SW20 292£690,000 -5.8%
3 SW17 50£540,000 -5.8%
4 CR4 268£432,500 -2.8%
4 KT3 64£582,500 -6.0%
6 SM4 218£475,000 -7.8%
7 SW16 52£450,000 -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 Merton 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 Merton aren't ranked.