Postcode district report · August 2026

HP4, Dacorum

HP4 is the 1st Hapiest of Dacorum'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
300
in the 12 months to August 2026
Median price
£712,750
+14.0% on the year before
Price per m²
£6,821
median, homes with an EPC
Flats
20%
of homes sold

HP4 on the HPAI Swatch

Each tile ranks HP4 against the other postcode districts of Dacorum.

Price per m²£6,821/m² 1st of 7
Price change+14.0% 1st of 7
Sales a year300 a year 3rd of 7
Sales change-12.6% 4th of 7
Energy efficiency68 EPC score 2nd of 7
Carbon4.3 t CO₂ a home 5th of 7
Station nearby1.0 km 2nd of 7
Yellow the best in Dacorum Green above average Blue below average Purple weakest in Dacorum

Yellow is Hapi: the more yellow, the better HP4 compares with the rest of Dacorum. These colours compare postcode districts within Dacorum; Dacorum's own Swatch compares it with areas across England and Wales.

Dacorum's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 HP4 300£712,750 +14.0%
2 HP2 365£380,000 -0.7%
3 HP3 332£467,500 +8.7%
4 HP1 289£415,000 -2.6%
5 HP23 212£485,000 -8.9%
6 AL3 66£452,500 +9.0%
7 WD4 71£620,000 -10.8%

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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 Dacorum 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 Dacorum aren't ranked.