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Get started12 The Warren is a five-bedroom detached house in Radlett (WD7 7DX). It has a recorded floor area of 335 m² (around 3606 sq ft), construction records dating it to 1900-1929 and council tax band H. The latest certificate (July 2022) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in July 2012 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Average to Good and hot-water efficiency went from Average to Good; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 83), a 2-band jump.
Sale prices here have outpaced England HPI: 1.4% per year against 0.1% for the wider region. On a £-per-square-foot basis, the last sale (£929/sq ft) was about 105.4% above the typical sold price in the postcode. A recent sale: £3,350,000 in August 2025. 4 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved.
12 The Warren's carbon output runs well above what efficient homes in the postcode produce.
Two storey front and rear extensions to include insertion of 4 x front roof lights and removal of chimney stacks; new single storey front porch.
12 The Warren's sale-price growth has lagged the wider UK trajectory across its history on file.
£3,063,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.4% per year over 19 years.
£3,350,000
Growth on file: 1.4% per year over 19 years.
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On price per m², 12 The Warren stands well clear of the street.
Price per m²
£10,000
Street avg £5,553
Floor Area
335 m²
Street avg 455 m²
Habitable Rooms
8 rooms
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.5 km
Williams Way — bus stop.

Daytime· 07:00 – 23:00
43.0dB

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Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency improved
Window efficiency improved
Roof insulation improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
T25. DEODAR CEDAR. Fell to ground level via sectional takedown
2 more applications for this property
See the full planning history in the property report.
8 August 2025Most recent
£3,350,000
+30.1%over 18 years23 August 2006
£2,575,000
Median price across the last 5 sales in WD7 7DX: £2,240,000 (2024–2016).
Detailed EPC data
Full energy ratings, history and recommendations
Full planning history
Every application and decision on record
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Comparable sales, transport, crime, schools and more

Street avg 10 rooms
CO₂ Emissions
12.0 t/year
Street avg 11.5 t/year
WD7 7ED
Closest school
1.0 km
Newberries Primary School. 6 schools nearby.
Night-time· 23:00 – 07:00
36.3dB