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Get started21 Ashtree Way is a four-bedroom detached house in Hemel Hempstead (HP1 1QS). It has a recorded floor area of 100 m² (around 1076 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (March 2019) shows a D (score 68), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 82), a 2-band jump. Our model identifies extension potential, subject to local planning policy.
2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Today's modelled estimate of £723,000 is 29.1% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£520/sq ft) was about 50.9% above the typical sold price in the postcode. At 100 m² it's 28.1% smaller than the typical home in the postcode (139 m² median across 15 EPCs). Sold August 2019 for £560,000.
Recommended upgrades on file would lift this property by multiple EPC bands.
21 Ashtree Way has an approved side and rear extension on the planning record.
Demolition of of existing garage. Construction of two storey side extension, single storey rear extension and single storey front extension.
21 Ashtree Way valuation sits well clear of the typical sold price in this postcode.
£723,000
Modelled from EPC, postcode comparables.
£560,000
Recorded with HM Land Registry.
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Detailed AI analysis
Floor Area for 21 Ashtree Way lags the street by a wide margin.
Price per m²
£5,600
Street avg £4,477
Floor Area
100 m²
Street avg 153 m²
Habitable Rooms
6 rooms
Street avg 7 rooms
Rail-style transport is unusually close for this postcode.
Crime
16/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Prince Park — bus stop.

Daytime· 07:00 – 23:00
50.0dB

Extension: Side and rear of property
Two storey side and single storey rear and front Extension.
27 August 2019Most recent
£560,000
Median price across the last 5 sales in HP1 1QS: £750,000 (2025–2024).
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Detailed EPC data
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Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
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CO₂ Emissions
3.8 t/year
Street avg 6.4 t/year
HP1 1SD
Closest school
0.4 km
St Rose's Catholic Infant School. 19 schools nearby.
Night-time· 23:00 – 07:00
39.0dB