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Get started9 Castle Mead is a four-bedroom semi-detached house in Hemel Hempstead (HP1 1PR). It has a recorded floor area of 125 m² (around 1345 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (April 2022) shows a D (score 65), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 79). Other recorded features include a conservatory and a basement. Our model identifies extension potential, subject to local planning policy. The home occupies a cul-de-sac position.
Sale prices here have outpaced England HPI: 3.9% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£473/sq ft) was about 102.4% above the typical sold price in the postcode. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. At 125 m² it's 17.9% larger than the typical home in the postcode (106 m² median across 15 EPCs). Last sale on file: £636,500 in November 2022. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Multiple extension applications run across more than a decade of planning history at 9 Castle Mead.
Extension: Single storey · Rear of property
Single storey rear extension measuring 5m deep with a maximum height of 3.99m and a maximum eaves height of 2.4m.
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£671,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.9% per year over 17 years.
£636,500
Growth on file: 3.9% per year over 17 years.
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Detailed AI analysis
9 Castle Mead is notably below the street on years held.
Price per m²
£5,092
Street avg £3,913
Floor Area
125 m²
Street avg 108 m²
Habitable Rooms
7 rooms
Street avg 5 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
Beechfield Road South — bus stop.

Daytime· 07:00 – 23:00
53.7dB

Conservatory
22 November 2022Most recent
£636,500
+76.8%over 14 years18 February 2008
£360,000
+7.5%over 2 years9 February 2006
£335,000
Median price across the last 5 sales in HP1 1PR: £530,000 (2023–2021).
An AI-written breakdown of everything that matters
Detailed EPC data
Full energy ratings, history and recommendations
Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
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CO₂ Emissions
4.7 t/year
Street avg 4.3 t/year
HP1 1SD
Closest school
0.4 km
Boxmoor Primary School. 29 schools nearby.
Night-time· 23:00 – 07:00
44.1dB