11 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
About 11 Highlea Avenue
11 Highlea Avenue is a three-bedroom detached house in Flackwell Heath, High Wycombe, High Wycombe (HP10 9AD). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1950-1966 and council tax band E. The latest certificate (September 2022) shows an E (score 47), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 84), a 3-band jump. Our model identifies extension potential, subject to local planning policy.
At 77 m² it sits well below the postcode median (116 m² across 11 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs). On a £-per-square-foot basis, the last sale (£652/sq ft) was about 42.1% above the typical sold price in the postcode. Most recent transfer: November 2024 at £540,000. One historical planning record sits against the property in 2025.
What this property has
Inside
- Bedrooms3
- Dining roomYes
Outside
- Private gardenRear
- GarageYes
Building
- Extension potentialPossible
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Certificate validity
Valid until 12 September 2032
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Planning history
1 application on record at 11 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
- Apr 2025ExtensionOutlineOutcome in report
Extension: Single storey · Rear of property
Notification of proposed single storey rear extension; Depth extending from the original rear wall of 4.50 metres, a maximum height of 2.85 metres and an eaves height of 2.85 metres
- Documents
- 6 docs on file
- Reference
- 25/05645/HPDN
Unlock 11 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 3 notable nearby
- The 6 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
£545,000
Modelled from EPC, postcode comparables.
£540,000
Recorded with HM Land Registry.
Sales timeline
21 November 2024Most recent
£540,000
Median price across the last 5 sales in HP10 9AD: £695,000 (2025–2023).
Nearby sales in HP10 9AD
17 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
Sold Nov 2025
£500,0003 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
Sold Aug 2025
£815,0002 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
Sold Nov 2024
£750,00015 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
Sold May 2023
£650,00018 Highlea Avenue, Flackwell Heath, High Wycombe, HP10 9AD
Sold Feb 2023
£695,000
Versus other Highlea Avenue homes
11 Highlea Avenue is notably below the street on epc rating.
Price per m²
£7,013
Street avg £5,887
Floor Area
77 m²
Street avg 117 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
5.6 t/year
Street avg 4.8 t/year
Similar properties nearby
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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
59/mo
Falling year-on-year across the wider district.
Nearest stop
0.5 km
The Common — bus stop.
Closest school
0.5 km
Carrington Junior School. 11 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
46.7dB

Night-time· 23:00 – 07:00
38.3dB







