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Get started12 Copperfields is a four-bedroom detached house in High Wycombe (HP12 4AN). It has a recorded floor area of 104 m² (around 1119 sq ft), construction records dating it to 1991-1995 and council tax band F. The latest certificate (November 2021) shows a D (score 55), a step below the typical UK home. When first surveyed in March 2009 the rating was E, the property has climbed 1 band since. Between certificates, lighting went from Poor to Very Good and main heating went from Average to Good. The recommended improvements would push it to C (score 77). Records show the property has been extended at some point in its history.
Sale prices here have outpaced England HPI: 5.2% per year against 0% for the wider region. Today's modelled estimate of £618,000 is 12.2% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£492/sq ft) was about 62.3% above the typical sold price in the postcode. One planning record on file: an extension approved in 2001. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs). Most recent transfer: April 2022 at £551,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
12 Copperfields has an approved rear extension on the planning record.
12 Copperfields has more than tripled in price since its earliest registered sale in 1998.
£618,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.2% per year over 24 years.
£551,000
Growth on file: 5.2% per year over 24 years.
On price per m², 12 Copperfields stands well clear of the street.
Price per m²
£5,298
Street avg £3,909
Floor Area
104 m²
Street avg 105 m²
Habitable Rooms
7 rooms
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
8/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km

Daytime· 07:00 – 23:00
49.4dB

Changes detected from historical EPC data
Heating controls upgraded for better temperature management
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Rear of property
Erection of conservatory to rear
1 April 2022Most recent
£551,000
+237.0%over 24 years6 March 1998
£163,500
Median price across the last 5 sales in HP12 4AN: £540,000 (2025–2024).
Street avg 6 rooms
CO₂ Emissions
5.7 t/year
Street avg 3.6 t/year
HP12 4FW
Railway Bridge — bus stop.
Closest school
0.6 km
Millbrook Combined School. 12 schools nearby.
Night-time· 23:00 – 07:00
41.2dB
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