Cromwell House, Flat 7, 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 96 m² (around 1033 sq ft). The latest certificate (February 2019) returns a B (score 84), comfortably above the UK average. At 96 m² this is the 2nd smallest of 10 units on EPC record in Cromwell House, where floor areas span 87–135 m². On EPC score it ranks last in the building (84 versus a best of 86).
At 96 m² it's 20.7% smaller than the typical home in the postcode (121 m² median across 14 EPCs). Across 2020–2021, sale prices on this property compounded at 4.7% per year. Today's modelled estimate of £537,000 is 19.3% above the 2021 sale price. Last sale on file: £450,000 in January 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Everything you need to know about Cromwell House
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Cromwell House's carbon output is low for the local stock.
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 changed hands twice within eighteen months — unusual for the area.
£537,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.7% per year over 1 year.
£450,000
Growth on file: 4.7% per year over 1 year.
Sales timeline
15 January 2021Most recent
£450,000
+4.7%over 11 months12 February 2020
£430,000
Median price across the last 5 sales in HP3 0DH: £610,000 (2025–2020).
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 4, 29 Box Lane, Hemel Hempstead, HP3 0DH
Sold Dec 2020
£563,000
Versus other Box Lane homes
On price per m², Cromwell House runs well behind the street norm.
Price per m²
£4,688
Street avg £6,185
Floor Area
96 m²
Street avg 105 m²
CO₂ Emissions
1.4 t/year
Street avg 1.6 t/year
Years Held
5 years
Street avg 6 years
Everything you need to know about Cromwell House
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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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