Flat 1, 12 St Leonard S Road, Surbiton, KT6 4DE
About Flat 1
Flat 1 is a one-bedroom semi-detached house in Surbiton (KT6 4DE). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 1900-1929 and council tax band C. At 32 m² this is the smallest unit on EPC record across the building (32–76 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (April 2024) shows a C (score 71). The rating has held steady at C across 2 certificates since April 2014. Between certificates, window efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor.
At 32 m² it sits well below the postcode median (56 m² across 41 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 76% of similar EPCs). Across 2001–2014, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £290,000 is 26.1% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£668/sq ft) was about 63% above the typical sold price in the postcode. 12 years since the last transfer (September 2014).
Know exactly what you're buying at Flat 1
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms1
- Bathrooms1
Building
- RefurbishedYes
Energy performance
Flat 1's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Single glazing replaced with double or better glazing
More low energy lighting installed
Planning history
Flat 1 has no planning applications on record.
Notable planning nearby
4applications of note in the surrounding area
We flagged 1 thing worth checking at Flat 1
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Sale price has at least doubled since 2001.
£290,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 13 years.
£230,000
Growth on file: 5.8% per year over 13 years.
Sales timeline
18 September 2014Most recent
£230,000
+109.1%over 13 years13 August 2001
£110,000
Median price across the last 5 sales in KT6 4DE: £440,000 (2025–2024).
Nearby sales in KT6 4DE
15 St Leonard S Road, Surbiton, KT6 4DE
Sold Feb 2025
£1,040,000Basement Flat, 3 St Leonard S Road, Surbiton, KT6 4DE
Sold Feb 2025
£356,000Flat 5, 12 St Leonard S Road, Surbiton, KT6 4DE
Sold Jul 2024
£335,000Garden Flat, 1 St Leonard S Road, Surbiton, KT6 4DE
Sold Jul 2024
£440,000Basement Flat, 6 St Leonard S Road, Surbiton, KT6 4DE
Sold Mar 2024
£452,500
Everything we know about Flat 1, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other St Leonard S Road homes
Flat 1 outperforms the street on co₂ emissions by a wide margin.
Price per m²
£7,188
Street avg £6,252
Floor Area
32 m²
Street avg 51 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
1.3 t/year
Street avg 2.6 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
St Leonard's Road — bus stop.
Closest school
0.1 km
St Andrew's and St Mark's CofE Junior School. 35 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
53.8dB

Night-time· 23:00 – 07:00
44.8dB