57a, Flat 4, High Street, Hemel Hempstead, HP1 3AF
About 57a
57a is a semi-detached house in Hemel Hempstead (HP1 3AF). It has a recorded floor area of 39 m² (around 420 sq ft) and construction records dating it to 1900-1929. At 39 m² this is the 4th smallest of 5 units on EPC record in 57a, where floor areas span 20–62 m². The building's EPC ratings span F to D, with this unit at the top. On EPC score it ranks first in the building (57 versus a worst of 31). The latest certificate (March 2025) shows a D (score 57), a step below the typical UK home. Earlier certificates rated it C (May 2009); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Poor and main heating went from Poor to Average; while wall efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 83), a 2-band jump. Main heating runs on electricity.
One planning record on file: new windows approved in 2023. Past consents include new windows, meaningful when judging how the property has evolved. At 39 m² it's 26.4% smaller than the typical home in the postcode (53 m² median across 34 EPCs).
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Low energy lighting percentage decreased
Single glazing replaced with double or better glazing
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has no mains gas supply, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
1 application on record at 57a, Flat 4, High Street, Hemel Hempstead, HP1 3AF
- Apr 2023RenovationHeritageOutcome in report
Replacement of 16 paned Georgian style sash window with double glazed wooden framed window.
New Windows- Documents
- 10 docs on file
- Reference
- 22/03534/LBC
Unlock 57a, Flat 4, High Street, Hemel Hempstead, HP1 3AF's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 1 notable nearby
- The 10 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
57a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£181,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in HP1 3AF: £245,000 (2022–2021).
Nearby sales in HP1 3AF
60 High Street, Hemel Hempstead, HP1 3AF
Sold Sept 2022
£820,000Flat 2, 71 High Street, Hemel Hempstead, HP1 3AF
Sold Nov 2021
£250,00067b, High Street, Hemel Hempstead, HP1 3AF
Sold Nov 2021
£245,00067a, High Street, Hemel Hempstead, HP1 3AF
Sold Sept 2021
£215,00057a, High Street, Hemel Hempstead, HP1 3AF
Sold Aug 2021
£180,000
Versus other High Street homes
EPC Rating
57 (D)
Street avg 61 (D)
Floor Area
39 m²
Street avg 51 m²
CO₂ Emissions
4.2 t/year
Street avg 3.6 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
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The neighbourhood at a glance
Crime
16/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
The Old Town Hall — bus stop.
Closest school
0.2 km
George Street Primary School. 34 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
53.7dB

Night-time· 23:00 – 07:00
43.5dB







