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Get started20 Elm Walk is a four-bedroom detached house in Radlett (WD7 8DP). It has a recorded floor area of 156 m² (around 1679 sq ft), construction records dating it to 1930-1949 and council tax band F. The latest certificate (March 2015) shows a D (score 67), on the cusp of jumping into the C band. When first surveyed in October 2008 the rating was G, the property has climbed 3 bands since. Between certificates, window efficiency went from Poor to Good, hot-water efficiency went from Poor to Good and lighting went from Average to Very Good. The recommended improvements would push it to C (score 79). The latest certificate is from March 2015, so improvements made since then won't be reflected.
Sale prices here have outpaced England HPI: 15% per year against 0% for the wider region. Today's modelled estimate of £1,225,000 is 23.1% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£593/sq ft) was about 77.8% above the typical sold price in the postcode. 6 planning records sit against the property, 3 approved, 1 refused. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved. On the market in November 2015 and unlisted since — roughly 11 years.
20 Elm Walk's EPC is over a decade old — improvements since won't be reflected.
This certificate is over 10 years old and is no longer valid.Expired 10 Mar 2025
20 Elm Walk has 2 separate extension applications on the council record.
Application for approval of details reserved by condition(s) 2, 3, 6 & 7 of planning permission reference TP/12/1661
20 Elm Walk has more than doubled in price since the earliest registered sale in 2009.
£1,225,000
Modelled from EPC, postcode comparables and a sale-price growth of 15.0% per year over 6 years.
£995,000
Growth on file: 15.0% per year over 6 years.
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Price per m² for 20 Elm Walk runs comfortably ahead of the street norm.
Price per m²
£6,378
Street avg £5,274
Floor Area
156 m²
Street avg 147 m²
Habitable Rooms
6 rooms
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Shops — bus stop.

Daytime· 07:00 – 23:00
47.0dB

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Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Connected to mains gas supply
Hot water efficiency improved
Windows upgraded, improving insulation
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Application for a non-material amendment following the grant of planning permission reference TP/12/1661
4 more applications for this property
See the full planning history in the property report.
23 November 2015Most recent
£995,000
+136.9%over 6 years25 September 2009
£420,000
Median price across the last 5 sales in WD7 8DP: £955,000 (2025–2019).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
Plus much more
Comparable sales, transport, crime, schools and more

Street avg 6 rooms
CO₂ Emissions
5.7 t/year
Street avg 5.5 t/year
WD7 8AP
Closest school
0.4 km
St John's Church of England Infant and Nursery School. 4 schools nearby.
Night-time· 23:00 – 07:00
38.0dB