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Get started12a is a four-bedroom detached house in Sunbury On Thames (TW16 5AR). It has a recorded floor area of 158 m² (around 1701 sq ft), construction records dating it to 1967-1975 and council tax band G. The latest certificate (February 2017) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 3 certificates since November 2016. Between certificates, wall efficiency went from Poor to Good; while window efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 83), a 2-band jump.
2 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. At 158 m² it's 26.1% larger than the typical home in the postcode (125 m² median across 30 EPCs). Last changed hands 9 years ago, in March 2017. Today's modelled estimate of £806,000 is 27.9% above the 2017 sale price.
12a's carbon output runs well above what efficient homes in the postcode produce.
12a has 2 separate extension applications on the council record.
Extension: Single storey · Rear of property
Erection of single storey rear extension.
12a valuation sits well clear of the typical sold price in this postcode.
£806,000
Modelled from EPC, postcode comparables.
£630,000
Recorded with HM Land Registry.
12a outperforms the street on floor area by a wide margin.
Price per m²
£3,987
Street avg £4,062
Floor Area
158 m²
Street avg 131 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km

Daytime· 07:00 – 23:00
47.9dB

Changes detected from historical EPC data
Heating controls changed
Hot water system changed
More low energy lighting installed
Hot water system upgraded
Glazing upgraded to newer, more efficient type
Cavity wall insulation installed
Roof insulation improved
Low energy lighting percentage decreased
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Single storey · Rear of property
Single storey rear extension
31 March 2017Most recent
£630,000
Median price across the last 5 sales in TW16 5AR: £662,500 (2025–2023).
CO₂ Emissions
7.2 t/year
Street avg 5.9 t/year
TW16 5BJ
Stain Hill West Reservoir — bus stop.
Closest school
0.9 km
Beauclerc Infant and Nursery School. 24 schools nearby.
Flood risk
Low
From the Environment Agency.
Night-time· 23:00 – 07:00
41.3dB
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