14a is a six-bedroom detached house in Beaconsfield (HP9 2NP). It has a recorded floor area of 403 m² (around 4338 sq ft), construction records dating it to 2007-2011 and council tax band H. The latest certificate (November 2022) returns a B (score 81), comfortably above the UK average. When first surveyed in February 2009 the rating was C, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Good.
Sale prices here have outpaced England HPI: 8.8% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£553/sq ft) was about 28% above the typical sold price in the postcode. At 403 m² the property is well over the postcode median (260 m² across 17 EPCs), placing it in the larger end of the local stock. Sold August 2023 for £2,400,000. Across the public record there are 4 sales, relatively high churn for a single property. 5 planning records sit against the property, 0 approved, 3 refused.
14a's carbon output runs well above what efficient homes in the postcode produce.
Variation of Condition 12 of planning permission 08/00456/FUL to allow planting on flat roof area.
14a has more than quadrupled in price since its earliest registered sale in 2004.
£2,393,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.8% per year over 19 years.
£2,400,000
Growth on file: 8.8% per year over 19 years.
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Detailed analysis
A written breakdown of everything that matters
Years Held for 14a lags the street by a wide margin.
Price per m²
£5,955
Street avg £5,449
Floor Area
403 m²
Street avg 323 m²
Habitable Rooms
10 rooms
Street avg 8 rooms
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Wilton Road — bus stop.

Daytime· 07:00 – 23:00
47.2dB

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Changes detected from historical EPC data
Loft insulation upgraded to recommended levels
Hot water efficiency decreased
More low energy lighting installed
Retention of pergola.
Full planning data for 14a, Assheton Road, Beaconsfield, HP9 2NP
3 more on this property, plus every nearby application and full decision details, in the report.
30 August 2023Most recent
£2,400,000
+50.5%over 14 years21 May 2009
£1,595,000
+132.8%over 1 year19 March 2008
£685,000
+37.3%over 3 years13 December 2004
£499,000
Median price across the last 5 sales in HP9 2NP: £2,200,000 (2025–2021).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Comparable sales data
Plus transport, crime, schools and air quality
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CO₂ Emissions
7.2 t/year
Street avg 7.0 t/year
HP9 2NU
Closest school
0.8 km
St Mary and All Saints CofE Primary School. 6 schools nearby.
Night-time· 23:00 – 07:00
38.2dB