Postcode district report · August 2026

SL9, Buckinghamshire

SL9 is the 13th Hapiest of Buckinghamshire's 32 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
225
in the 12 months to August 2026
Median price
£834,300
-3.0% on the year before
Price per m²
£6,111
median, homes with an EPC
Flats
20%
of homes sold

SL9 on the HPAI Swatch

Each tile ranks SL9 against the other postcode districts of Buckinghamshire.

Price per m²£6,111/m² 6th of 30
Price change-3.0% 23rd of 32
Sales a year225 a year 8th of 32
Sales change-17.9% 18th of 32
Energy efficiency68 EPC score 24th of 30
Carbon5.0 t CO₂ a home 27th of 30
Station nearby1.3 km 12th of 30
Yellow the best in Buckinghamshire Green above average Blue below average Purple weakest in Buckinghamshire

Yellow is Hapi: the more yellow, the better SL9 compares with the rest of Buckinghamshire. These colours compare postcode districts within Buckinghamshire; Buckinghamshire's own Swatch compares it with areas across England and Wales.

Buckinghamshire's postcode districts, Hapiest first

#Postcode districtSwatchHomes soldMedian pricePrice change
1 SL2 132£692,500 +19.9%
2 HP5 241£485,000 +10.2%
3 HP17 142£540,000 +7.7%
4 SL8 112£581,250 +3.6%
5 HP6 135£780,000 +5.8%
6 HP13 416£387,750 +2.0%
6 HP21 358£325,000 +0.0%
8 SL7 234£650,050 -3.7%
9 HP19 310£315,000 +3.2%
10 LU7 167£450,000 +0.0%
11 HP10 221£546,500 -0.6%
12 SL3 26£610,000 +22.0%
13 SL9 225£834,300 -3.0%
14 SL6 55£530,000 +3.9%
15 HP18 218£406,250 -1.0%
16 HP15 193£532,500 -3.2%
17 HP27 176£508,500 -3.7%
18 HP7 100£712,475 +1.8%
19 HP9 171£945,000 -5.0%
20 HP12 165£385,000 +3.7%
21 HP22 344£500,000 +1.0%
22 HP20 146£308,000 +9.2%
23 HP8 72£737,500 -2.3%
24 HP14 181£475,000 -5.6%
25 LU6 30£520,000 +12.9%
26 SL1 70£577,500 +7.1%
27 UB9 79£495,000 -3.2%
28 HP16 115£600,000 -4.8%
29 MK18 373£370,000 -3.9%
30 MK17 74£460,000 -1.6%
31 HP11 143£340,000 -2.9%
32 SL0 103£535,000 -7.4%

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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 Buckinghamshire 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 Buckinghamshire aren't ranked.