Castle Keep, Warren Wood Drive, High Wycombe, HP11 1DY
About Castle Keep
Castle Keep is a four-bedroom detached house in High Wycombe (HP11 1DY). It has a recorded floor area of 211 m² (around 2271 sq ft), construction records dating it to before 1900 and council tax band G. The latest certificate (March 2023) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it D (December 2011); the latest reading is one band lower. Between certificates, roof efficiency dropped from Good to Very Poor. The recommended improvements would lift it to C (score 79), a 2-band jump. Other recorded features include a balcony and a conservatory. Period features are noted in the property record. Records show the property has been extended at some point in its history.
Across 1995–2025, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £1,085,000 is 10.7% below the 2025 sale of £1,215,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£535/sq ft) was about 457.6% above the typical sold price in the postcode. It changed hands recently, sold June 2025 for £1,215,000. 8 planning records sit against the property, 3 approved, 0 refused. Past consents include an extension and solar panel installation, meaningful when judging how the property has evolved.
What this property has
Inside
- Bedrooms4
- Bathrooms3
- Open-plan layoutYes
- ConservatoryYes
Outside
- Private gardenYes
- BalconyYes
- Summer houseYes
Building
- Period featuresYes
- Previously extendedYes
Everything you need to know about Castle Keep
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Castle Keep's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Certificate validity
Valid until 24 March 2033
Property Improvements
Changes detected from historical EPC data
Solar water heating installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,645 · Includes VAT
Planning history
Planning records include a solar-panel installation at Castle Keep.
8 applications on record at Castle Keep, Warren Wood Drive, High Wycombe, HP11 1DY
- Sept 2009Solar PanelsFullOutcome in report
Householder application for raising of existing stair turret , works to form roof terrace including decking, planters and guardrails and installation of solar thermal panel and associated external alterations including overcladding of part of building with lime render, planted living wall modules and timber cladding (amendment to p/p 07/07931/FUL)
Extension- Documents
- 15 docs on file
- Reference
- 09/06375/FUL
- More recent applications — locked
- Tree WorksSept 2024Decision
- Tree WorksJan 2020Decision
+ 5 more applications in the report
Unlock Castle Keep, Warren Wood Drive, High Wycombe, HP11 1DY's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (7 on record)
- All 8 applications on this property in full, plus 9 notable nearby
- The 40 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
Price for Castle Keep has grown more than fourfold since the 1995 starting point.
£1,085,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.5% per year over 30 years.
£1,215,000
Growth on file: 5.5% per year over 30 years.
Sales timeline
26 June 2025Most recent
£1,215,000
+22.7%over 9 years19 June 2016
£990,000
23 July 2012
£990,000
+57.8%over 8 years28 September 2003
£627,500
+160.4%over 8 years6 April 1995
£241,000
Median price across the last 5 sales in HP11 1DY: £237,500 (2020–1996).
Nearby sales in HP11 1DY
Everything you need to know about Castle Keep
The true value, the hidden risks and the full sale history, in one report.
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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
228/mo
Falling year-on-year across the wider district.
Nearest stop
0.5 km
Chestnut Avenue — bus stop.
Closest school
0.9 km
Beechview Academy. 22 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
47.8dB

Night-time· 23:00 – 07:00
40.3dB






