Mallard House, Flat 15, The Millstream, London Road, High Wycombe, HP11 1AD
About Mallard House
Mallard House is a semi-detached house in High Wycombe (HP11 1AD). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 1983-1990 and council tax band C. At 63 m² this is the 8th smallest of 13 units on EPC record in Mallard House, where floor areas span 55–70 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (October 2023) shows a C (score 72). When first surveyed in March 2020 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Average and main heating went from Very Poor to Average; while roof efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 81). Main heating runs on electricity.
Most recent transfer was June 2025 at £245,000 — fresh data. Across 2000–2025, sale prices on this property compounded at 3.4% per year. On a £-per-square-foot basis, the last sale (£361/sq ft) was about 44.4% above the typical sold price in the postcode.
Everything you need to know about Mallard House
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
EPC Rating
Certificate validity
Valid until 15 October 2033
Property Improvements
Changes detected from historical EPC data
Heating system upgraded to a more efficient system
Heating controls changed
Hot water efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
Mallard House has no planning applications on record.
But the area is active
9 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Mallard House has more than doubled in price since the earliest registered sale in 2000.
£257,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.4% per year over 25 years.
£245,000
Growth on file: 3.4% per year over 25 years.
Sales timeline
12 June 2025Most recent
£245,000
+133.3%over 25 years24 May 2000
£105,000
Median price across the last 5 sales in HP11 1AD: £250,000 (2025–2018).
Nearby sales in HP11 1AD
Mallard House, Flat 7, The Millstream, London Road, High Wycombe, HP11 1AD
Sold Dec 2025
£245,000Mallard House, Flat 11, The Millstream, London Road, High Wycombe, HP11 1AD
Sold Oct 2025
£250,000Mallard House, Flat 5, The Millstream, London Road, High Wycombe, HP11 1AD
Sold Dec 2022
£282,500Mallard House, Flat 3, The Millstream, London Road, High Wycombe, HP11 1AD
Sold Nov 2017
£267,500Mallard House, Flat 12, The Millstream, London Road, High Wycombe, HP11 1AD
Sold Feb 2017
£250,000
Versus other The Millstream homes
Mallard House is notably below the street on years held.
Price per m²
£3,889
Street avg £3,519
Floor Area
63 m²
Street avg 62 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
3.5 t/year
Street avg 3.3 t/year
Everything you need to know about Mallard House
The true value, the hidden risks and the full sale history, in one report.
Pick your report · from £14.99
One time fee only - money back guarantee

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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
228/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Cricket Ground — bus stop.
Closest school
0.8 km
Hannah Ball Academy. 20 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
50.0dB

Night-time· 23:00 – 07:00
40.5dB






