21 Holyhead Mews, Slough, SL1 6BD
About 21 Holyhead Mews
21 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.
What this property has
Inside
- Bedrooms2
- Bathrooms2
- EnsuiteYes
Outside
- ParkingAllocated
Building
- Heating systemElectric
Energy performance
EPC Rating
Property Improvements
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
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
21 Holyhead Mews has no planning applications on record.
But the area is active
5 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
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.
Sales timeline
29 October 2009Most recent
£137,500
Median price across the last 5 sales in SL1 6BD: £235,000 (2025–2025).
Versus other Holyhead Mews homes
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
CO₂ Emissions
2.4 t/year
Street avg 2.1 t/year
Similar properties nearby
1 Holyhead Mews
SL1 6BD
1 Leaholme Gardens
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1 Kinnaird Close
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SL1 6DA
1 Coniston Crescent
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1 Burnham Heights, Bath Road
SL1 6JE
The neighbourhood at a glance
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.
Closest school
0.3 km
Cippenham School. 24 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
53.1dB

Night-time· 23:00 – 07:00
44.2dB







