Top Floor Flat, 27 London Road, High Wycombe, HP11 1BJ
About Top Floor Flat
Top Floor Flat is an end-of-terrace house in High Wycombe (HP11 1BJ). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1930-1949 and council tax band C. The latest certificate (March 2023) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in November 2008 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, hot-water efficiency went from Poor to Good and main heating went from Poor to Good; while window efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 73).
Across 2013–2022, sale prices on this property compounded at 11.8% per year. Today's modelled estimate of £330,000 is 56% below the 2022 sale of £750,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£942/sq ft) was about 283.2% above the typical sold price in the postcode. At 74 m² it sits well below the postcode median (166 m² across 9 EPCs), making it one of the more compact homes locally. Last sale on file: £750,000 in August 2022. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. One historical planning record sits against the property in 2025.
Know exactly what you're buying at Top Floor Flat
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Connected to mains gas supply
Hot water system upgraded
Wall insulation improved
Planning history
- Nov 2025RenovationFullIn report
Replacement of existing timber windows to replace with white heritage style uPVC sliding sash windows
- Agent
- Jane Duncan Architects Ltd
New Windows- Documents
- 9 docs on file
- Reference
- PL/25/2437/FA
We flagged 2 things worth checking at Top Floor Flat
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Signs of HMO activity in the area
- Larger development activity nearby
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Sales history & valuation
Sale price has at least doubled since 2013.
£330,000
Modelled from EPC, postcode comparables and a sale-price growth of 11.8% per year over 9 years.
£750,000
Growth on file: 11.8% per year over 9 years.
Sales timeline
7 August 2022Most recent
£750,000
+167.9%over 8 years10 October 2013
£280,000
Median price across the last 5 sales in HP11 1BJ: £535,000 (2019–2016).
Nearby sales in HP11 1BJ
Everything we know about Top Floor Flat, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area
- Larger development activity nearby

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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
7/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Trinity Church — bus stop.
Closest school
0.8 km
Hamilton Academy. 21 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
51.9dB

Night-time· 23:00 – 07:00
42.8dB