12a, High Street, Sunningdale, Ascot, SL5 0LU
About 12a
12a is a detached house in Sunningdale, Ascot, Ascot (SL5 0LU). It has a recorded floor area of 177 m² (around 1905 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (August 2025) shows a D (score 58), a step below the typical UK home. When first surveyed in February 2010 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor; while roof efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to C (score 75).
Untraded for 26 years, with the last transfer in August 2000. 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 £1,103,000 sits 273.9% above the 2000 sale of £295,000. On a £-per-square-foot basis, the last sale (£155/sq ft) was about 58% below the postcode norm.
Energy performance
12a's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water system upgraded
Low energy lighting percentage decreased
Windows upgraded, improving insulation
Wall insulation improved
Heating controls upgraded for better temperature management
Roof insulation improved
More low energy lighting installed
Planning history
12a has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
12a's estimated value is more than triple its earliest registered sale price (2000).
£1,103,000
Modelled from EPC, postcode comparables.
£295,000
Recorded with HM Land Registry.
Sales timeline
14 August 2000Most recent
£295,000
Median price across the last 5 sales in SL5 0LU: £825,000 (2022–2014).
Nearby sales in SL5 0LU
4 High Street, Sunningdale, Ascot, SL5 0LU
Sold Jul 2022
£1,000,0006 High Street, Sunningdale, Ascot, SL5 0LU
Sold Aug 2020
£835,0002 High Street, Sunningdale, Ascot, SL5 0LU
Sold Oct 2016
£825,00012 High Street, Sunningdale, Ascot, SL5 0LU
Sold Feb 2016
£815,0008 High Street, Sunningdale, Ascot, SL5 0LU
Sold Sept 2012
£440,000
Versus other High Street homes
Price per m² for 12a lags the street by a wide margin.
Price per m²
£1,667
Street avg £5,080
Floor Area
177 m²
Street avg 150 m²
Habitable Rooms
8 rooms
Street avg 6 rooms
CO₂ Emissions
6.4 t/year
Street avg 6.1 t/year
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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Sandy Lane — bus stop.
Closest school
0.4 km
Holy Trinity CofE Primary School, Sunningdale. 6 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
47.9dB

Night-time· 23:00 – 07:00
39.9dB







