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12 St Leonard S Square, Surbiton, KT6 4DG

4 planning records
Property type
End terrace
Habitable rooms
4
From EPC
Floor area
63 m²
678 sq ft
Energy rating
C
Score 70
Council tax
Band D
Tenure
Owner Occupied
Overview

About 12 St Leonard S Square

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

12 St Leonard S Square is an end-of-terrace house in Surbiton (KT6 4DG). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (February 2026) shows a C (score 70). When first surveyed in December 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Good and lighting went from Poor to Good; while roof efficiency dropped from Good to Average. The recommended improvements would push it to B (score 82). This certificate was lodged in the last six months, so the rating reflects current condition.

It hasn't traded since June 1999, a hold of 27 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £529,000 sits 265% above the 1999 sale of £144,950. On a £-per-square-foot basis, the last sale (£214/sq ft) was about 59.2% below the postcode norm. 4 planning records sit against the property, 4 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Its energy rating outperforms most of the postcode (better than 78% of similar EPCs).

Before you offer

Know exactly what you're buying at 12 St Leonard S Square

Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.

Already flagged here

Larger development activity nearby
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Valuation

against the asking price

Risks

planning & flood

Sold prices

similar homes nearby

Trends

the local market

Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

The EPC has just been inspected, so the rating reflects current condition.

Current Certificate(1 of 2)
Feb 2026

EPC Rating

A
B
C
C70
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
2.0 t/year
Occupancy
Owner Occupied

Property Improvements

Changes detected from historical EPC data

Feb 2026from Dec 2009
EPC improved fromE49toC70
Heating Controls
Prog + StatFull

Heating controls upgraded for better temperature management

Windows
Partial DoubleHigh Performance

High performance glazing installed

Walls
Very PoorPoor

Wall insulation improved

Low Energy Lighting
20%100%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 12 St Leonard S Square, Surbiton, KT6 4DG, sourced from the PlanIt planning register.

12 St Leonard S Square has 2 separate extension applications on the council record.

  1. Apr 2017
    OutbuildingFull
    In report

    Erection of a timber flat roof shed to be positioned to side of property

    Council
    Surbiton
    Documents
    8 docs on file
    Reference
    17/16095
    View planning record
  2. Apr 2017
    OutbuildingFull
    In report

    Erection of a timber flat roof shed to be positioned to side of property

    Documents
    8 docs on file
    Reference
    17/16095/HOU
    View planning record
Before you offer

We flagged 1 thing worth checking at 12 St Leonard S Square

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
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Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

12 St Leonard S Square's estimated value is more than triple its earliest registered sale price (1999).

Current estimate

£529,000

Modelled from EPC, postcode comparables.

See how we calculated this
Last sold (1999)

£144,950

Recorded with HM Land Registry.

Sales timeline

  1. 3 June 1999Most recent

    £144,950

Median price across the last 5 sales in KT6 4DG: £580,000 (2025–2021).

Before you offer

Everything we know about 12 St Leonard S Square, 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
£14.99
Trusted by UK homebuyers
Preview of the full property report
On the street

Versus other St Leonard S Square homes

Four headline reads against 9 similar houses on this street, drawn from the latest EPC and Land Registry data.

On price per m², 12 St Leonard S Square runs well behind the street norm.

Price per m²

£2,301

Street avg £8,280

Strongly below

Floor Area

63 m²

Street avg 60 m²

Above

Habitable Rooms

4 rooms

Street avg 3 rooms

Above

CO₂ Emissions

2.0 t/year

Street avg 2.6 t/year

Above
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Surbiton district page.

Rail-style transport is unusually close for this postcode.

Crime

9/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

St Leonard's Road — bus stop.

Closest school

0.2 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.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around KT6 4DG from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for KT6 4DG

Daytime· 07:00 – 23:00

53.4dB

Low
Night-time road noise heatmap for KT6 4DG

Night-time· 23:00 – 07:00

44.9dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 12 St Leonard S Square, Surbiton, KT6 4DG. Each answer is also embedded as structured data for search engines.