Postcode district report · August 2026

CM20, Harlow

CM20 is the 3rd Hapiest of Harlow's 4 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
£320,000
+1.6% on the year before
Price per m²
£3,988
median, homes with an EPC
Flats
33%
of homes sold

CM20 on the HPAI Swatch

Each tile ranks CM20 against the other postcode districts of Harlow.

Price per m²£3,988/m² 3rd of 4
Price change+1.6% 3rd of 4
Sales a year179 a year 3rd of 4
Sales change-20.8% 4th of 4
Energy efficiency68 EPC score 3rd of 4
Carbon3.0 t CO₂ a home 2nd of 4
Station nearby1.3 km 1st of 4
Yellow the best in Harlow Green above average Blue below average Purple weakest in Harlow

Yellow is Hapi: the more yellow, the better CM20 compares with the rest of Harlow. These colours compare postcode districts within Harlow; Harlow's own Swatch compares it with areas across England and Wales.

Harlow's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 CM17 314£386,000 +2.2%
2 CM18 221£325,000 +3.2%
3 CM20 179£320,000 +1.6%
4 CM19 138£334,500 -0.1%

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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 Harlow 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 Harlow aren't ranked.