Postcode district report · August 2026

CM3, Chelmsford

CM3 is the 2nd Hapiest of Chelmsford's 6 postcode districts on the HPAI Swatch, which compares them with each other on prices, how the market is moving, energy efficiency and transport. CM3 also reaches into Maldon and Braintree; these figures are for its homes in Chelmsford.

Homes sold
467
in the 12 months to August 2026
Median price
£435,000
-0.3% on the year before
Price per m²
£4,716
median, homes with an EPC
Flats
9%
of homes sold

CM3 on the HPAI Swatch

Each tile ranks CM3 against the other postcode districts of Chelmsford.

Price per m²£4,716/m² 3rd of 6
Price change-0.3% 4th of 6
Sales a year467 a year 3rd of 6
Sales change-6.9% 3rd of 6
Energy efficiency73 EPC score 2nd of 6
Carbon3.5 t CO₂ a home 4th of 6
Station nearby3.8 km 5th of 6
Yellow the best in Chelmsford Green above average Blue below average Purple weakest in Chelmsford

Yellow is Hapi: the more yellow, the better CM3 compares with the rest of Chelmsford. These colours compare postcode districts within Chelmsford; Chelmsford's own Swatch compares it with areas across England and Wales.

Chelmsford's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 CM2 725£381,000 +1.6%
2 CM3 467£435,000 -0.3%
2 CM11 28£608,750 -11.6%
4 SS11 53£465,000 +8.1%
5 CM1 712£389,000 -2.7%
6 CM4 32£851,250 +1.3%

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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 Chelmsford 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 Chelmsford aren't ranked.