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Get started21 Holyhead Mews is a two-bedroom semi-detached house in Slough (SL1 6BD). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to 2003-2006 and council tax band C. At 63 m² this is the 35th smallest of 47 units on EPC record in the building, where floor areas span 54–73 m². The building's EPC ratings span C to B, with this unit at the bottom. The latest certificate (May 2022) shows a C (score 71). The rating has held steady at C across 3 certificates since August 2009. Between certificates, lighting went from Average to Very Good; while main heating dropped from Poor to Very Poor. Main heating runs on electricity.
Untraded for 17 years, with the last transfer in October 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £236,000 sits 71.6% above the 2009 sale of £137,500. On a £-per-square-foot basis, the last sale (£203/sq ft) was about 38.7% below the postcode norm.
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£236,000
Modelled from EPC, postcode comparables.
£137,500
Recorded with HM Land Registry.
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Detailed AI analysis
21 Holyhead Mews is notably below the street on price per m².
Price per m²
£2,183
Street avg £3,658
Floor Area
63 m²
Street avg 62 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
Rail-style transport is unusually close for this postcode.
Crime
18/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
St Andrews Way — bus stop.

Daytime· 07:00 – 23:00
53.1dB

Changes detected from historical EPC data
Hot water efficiency improved
More low energy lighting installed
Heating system changed
Hot water efficiency decreased
Window efficiency improved
Floor insulation added or improved
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29 October 2009Most recent
£137,500
Median price across the last 5 sales in SL1 6BD: £235,000 (2025–2025).
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Detailed EPC data
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Every application and decision on record
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CO₂ Emissions
2.4 t/year
Street avg 2.1 t/year
SL1 6LD
Closest school
0.3 km
Cippenham School. 24 schools nearby.
Night-time· 23:00 – 07:00
44.2dB