Postcode district report · August 2026

SN4, Wiltshire

SN4 is the 14th Hapiest of Wiltshire's 23 postcode districts on the HPAI Swatch, which compares them with each other on prices, how the market is moving, energy efficiency and transport. SN4 also reaches into Swindon; these figures are for its homes in Wiltshire.

Homes sold
199
in the 12 months to August 2026
Median price
£310,000
-0.4% on the year before
Price per m²
£4,052
median, homes with an EPC
Flats
13%
of homes sold

SN4 on the HPAI Swatch

Each tile ranks SN4 against the other postcode districts of Wiltshire.

Price per m²£4,052/m² 5th of 23
Price change-0.4% 13th of 23
Sales a year199 a year 15th of 23
Sales change-6.4% 8th of 23
Energy efficiency60 EPC score 22nd of 23
Carbon4.8 t CO₂ a home 20th of 23
Station nearby8.3 km 16th of 23
Yellow the best in Wiltshire Green above average Blue below average Purple weakest in Wiltshire

Yellow is Hapi: the more yellow, the better SN4 compares with the rest of Wiltshire. These colours compare postcode districts within Wiltshire; Wiltshire's own Swatch compares it with areas across England and Wales.

Wiltshire's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 SN15 424£321,000 +3.5%
2 SP9 54£280,000 +16.7%
3 SN5 109£340,000 +3.0%
4 SP2 391£310,000 +2.1%
5 SN11 337£282,000 +2.5%
6 BA13 330£270,000 +0.7%
7 SN14 274£320,000 +1.6%
8 BA15 191£420,000 -1.2%
8 SN6 73£375,000 -5.3%
10 SN10 398£310,000 +5.1%
11 BA12 373£300,000 -2.8%
12 SN8 246£435,000 -3.3%
13 SP1 281£325,000 +4.0%
14 SN4 199£310,000 -0.4%
15 SP5 202£457,500 -6.6%
16 SN13 221£363,000 -2.6%
17 SN12 371£297,000 -1.0%
18 BA14 640£279,000 -2.1%
19 SN9 102£362,500 -5.1%
20 SN16 171£400,000 -3.4%
21 SP4 323£325,000 +0.0%
22 SP3 109£450,000 +10.0%
23 SP11 60£316,500 +19.4%

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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 Wiltshire 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 Wiltshire aren't ranked.