Cromwell House, Flat 6, 29 Box Lane, Hemel Hempstead, HP3 0DH
About Cromwell House
Cromwell House is a detached house in Hemel Hempstead (HP3 0DH). It has a recorded floor area of 135 m² (around 1453 sq ft). The latest certificate (February 2019) returns a high B (score 86), putting the home a stone's throw from an A rating. At 135 m² this is the 9th smallest of 10 units on EPC record in Cromwell House, where floor areas span 87–135 m².
At 135 m² it's 20.5% larger than the typical home in the postcode (112 m² median across 14 EPCs). Sold March 2019 for £700,000.
Energy performance
EPC Rating
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Planning history
Cromwell House has no planning applications on record.
But the area is active
2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Cromwell House valuation sits well clear of the typical sold price in this postcode.
£735,000
Modelled from EPC, postcode comparables.
£700,000
Recorded with HM Land Registry.
Sales timeline
11 March 2019Most recent
£700,000
Median price across the last 5 sales in HP3 0DH: £610,000 (2025–2021).
Nearby sales in HP3 0DH
13 Box Lane, Hemel Hempstead, HP3 0DH
Sold Jul 2025
£2,200,000Cromwell House, Flat 2, 29 Box Lane, Hemel Hempstead, HP3 0DH
Sold Oct 2024
£610,000Cromwell House, Flat 8, 29 Box Lane, Hemel Hempstead, HP3 0DH
Sold Feb 2024
£475,0001 Box Lane, Hemel Hempstead, HP3 0DH
Sold Jan 2021
£885,000Cromwell House, Flat 7, 29 Box Lane, Hemel Hempstead, HP3 0DH
Sold Jan 2021
£450,000
Versus other Box Lane homes
On floor area, Cromwell House stands well clear of the street.
Price per m²
£5,185
Street avg £6,130
Floor Area
135 m²
Street avg 101 m²
CO₂ Emissions
1.6 t/year
Street avg 1.6 t/year
Years Held
7 years
Street avg 6 years
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Boxmoor House School — bus stop.
Closest school
0.9 km
St Rose's Catholic Infant School. 15 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
55.2dB

Night-time· 23:00 – 07:00
47.5dB







