Postcode district report · August 2026

SG4, North Hertfordshire

SG4 is the 2nd Hapiest of North Hertfordshire'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
379
in the 12 months to August 2026
Median price
£460,000
-1.5% on the year before
Price per m²
£5,424
median, homes with an EPC
Flats
24%
of homes sold

SG4 on the HPAI Swatch

Each tile ranks SG4 against the other postcode districts of North Hertfordshire.

Price per m²£5,424/m² 2nd of 7
Price change-1.5% 5th of 7
Sales a year379 a year 1st of 7
Sales change-21.4% 7th of 7
Energy efficiency70 EPC score 3rd of 7
Carbon3.1 t CO₂ a home 3rd of 7
Station nearby0.9 km 4th of 7
Yellow the best in North Hertfordshire Green above average Blue below average Purple weakest in North Hertfordshire

Yellow is Hapi: the more yellow, the better SG4 compares with the rest of North Hertfordshire. These colours compare postcode districts within North Hertfordshire; North Hertfordshire's own Swatch compares it with areas across England and Wales.

North Hertfordshire's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 SG1 82£400,000 +7.5%
2 SG4 379£460,000 -1.5%
2 SG5 227£480,000 +2.1%
4 SG7 145£365,000 +0.0%
5 SG6 303£400,000 +5.3%
6 SG3 60£426,125 -11.7%
7 SG8 248£370,000 -3.5%

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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 North Hertfordshire 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 North Hertfordshire aren't ranked.