The Lock House, Willow Avenue, Denham, Uxbridge, UB9 4AF
About The Lock House
The Lock House is a four-bedroom detached house in Denham, Uxbridge, Uxbridge (UB9 4AF). It has a recorded floor area of 130 m² (around 1399 sq ft) and construction records dating it to 1900-1929. The latest certificate (April 2017) shows an E (score 43), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since December 2008. Between certificates, roof efficiency went from Average to Good, window efficiency went from Average to Good and lighting went from Average to Very Good; while hot-water efficiency dropped from Average to Poor and main heating dropped from Average to Poor. The recommended improvements would push it to D (score 67). Main heating runs on lpg. Other recorded features include notable views. Period features are noted in the property record.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £709,000 sits 92.5% above the 2012 sale of £368,400. Last sold in November 2012, so it's been off the market for around 14 years. 3 planning records sit against the property, 0 approved, 2 refused.
What this property has
Inside
- Bedrooms4
- Bathrooms3
- EnsuiteYes
Outside
- Private gardenYes
- ParkingOff street
- Notable viewsYes
Building
- Period featuresYes
- RefurbishedYes
Energy performance
The Lock House sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Hot water efficiency decreased
Window efficiency improved
Roof insulation improved
More low energy lighting installed
Planning history
The Lock House has 3 separate extension applications on the council record.
- Jul 2015ExtensionFullIn report
Extension: Part single, part two storey · Rear of property
Single storey and part first floor rear extension.
- Documents
- 4 docs on file
- Reference
- 15/01227/FUL
- Mar 2015ExtensionFullIn report
Extension: Part single, part two storey · Rear of property
Part two storey/ part first floor rear extension
- Documents
- 7 docs on file
- Reference
- 14/02463/FUL
What's in The Lock House, Willow Avenue, Denham, Uxbridge, UB9 4AF's planning history?
1 more on this property, plus refusals, disputes and full decisions nearby, in the report.
Sales history & valuation
The Lock House valuation sits well clear of the typical sold price in this postcode.
£709,000
Modelled from EPC, postcode comparables.
£368,400
Recorded with HM Land Registry.
Sales timeline
30 November 2012Most recent
£368,400
Median price across the last 5 sales in UB9 4AF: £500,000 (2025–2016).
Nearby sales in UB9 4AF
4a, Willow Avenue, Denham, Uxbridge, UB9 4AF
Sold Oct 2025
£705,0001a, Willow Avenue, Denham, Uxbridge, UB9 4AF
Sold Mar 2025
£500,0003a, Willow Avenue, Denham, Uxbridge, UB9 4AF
Sold Apr 2021
£480,0002a, Willow Avenue, Denham, Uxbridge, UB9 4AF
Sold Mar 2020
£490,000Mill Stream Cottage, Willow Avenue, Denham, Uxbridge, UB9 4AF
Sold Nov 2016
£725,000
Versus other Willow Avenue homes
The Lock House is notably below the street on epc rating.
Price per m²
£2,834
Street avg £4,606
Floor Area
130 m²
Street avg 128 m²
Habitable Rooms
7 rooms
Street avg 5 rooms
CO₂ Emissions
5.0 t/year
Street avg 4.7 t/year
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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
0.2 km
Oakside — bus stop.
Closest school
0.9 km
Hermitage Primary School. 17 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
54.2dB

Night-time· 23:00 – 07:00
47.4dB







