Postcode district report · August 2026

CM4, Brentwood

CM4 is the 4th Hapiest of Brentwood'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. CM4 also reaches into Chelmsford; these figures are for its homes in Brentwood.

Homes sold
76
in the 12 months to August 2026
Median price
£623,000
-14.7% on the year before
Price per m²
£6,007
median, homes with an EPC
Flats
10%
of homes sold

CM4 on the HPAI Swatch

Each tile ranks CM4 against the other postcode districts of Brentwood.

Price per m²£6,007/m² 1st of 4
Price change-14.7% 4th of 4
Sales a year76 a year 4th of 4
Sales change-20.5% 4th of 4
Energy efficiency64 EPC score 4th of 4
Carbon4.7 t CO₂ a home 4th of 4
Station nearby0.6 km 1st of 4
Yellow the best in Brentwood Green above average Blue below average Purple weakest in Brentwood

Yellow is Hapi: the more yellow, the better CM4 compares with the rest of Brentwood. These colours compare postcode districts within Brentwood; Brentwood's own Swatch compares it with areas across England and Wales.

Brentwood's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 CM13 295£540,000 +11.7%
2 CM15 310£550,000 +4.8%
3 CM14 302£415,000 -3.5%
4 CM4 76£623,000 -14.7%

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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 Brentwood 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 Brentwood aren't ranked.