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Get started21 Crosthwaite Way is a detached house in Slough (SL1 6ET). It has a recorded floor area of 160 m² (around 1722 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (November 2015) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in October 2015 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Good and window efficiency went from Average to Good. The recommended improvements would lift it to B (score 82), a 2-band jump. The latest certificate is from November 2015, so improvements made since then won't be reflected.
At 160 m² the property is well over the postcode median (110 m² across 11 EPCs), placing it in the larger end of the local stock. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved.
Recommended upgrades on file would lift this property by multiple EPC bands.
This certificate is over 10 years old and is no longer valid.Expired 27 Nov 2025
Extension: Single storey · Rear of property
ERECTION OF A SINGLE STOREY REAR EXTENSION, CONVERSION OF GARAGE INTO A HABITABLE ROOM. ERECTION OF A SIDE EXTENSION TO PROVIDE A GARAGE
21 Crosthwaite Way has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£643,000
Modelled from EPC, postcode comparables.
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.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
21 Crosthwaite Way outperforms the street on habitable rooms by a wide margin.
EPC Rating
66 (D)
Street avg 64 (D)
Floor Area
160 m²
Street avg 113 m²
CO₂ Emissions
5.8 t/year
Rail-style transport is unusually close for this postcode.
Crime
18/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Crosthwaite Way — bus stop.

Daytime· 07:00 – 23:00
50.0dB

Changes detected from historical EPC data
Hot water efficiency decreased
Window efficiency improved
Hot water efficiency improved
Loft insulation installed or upgraded to 250mm+
Are we missing something? Tell us about home improvements to help adjust your valuation.
Extension: Single storey
ERECTION OF A SINGLE STOREY REAR EXTENSION, CONVERSION OF EXISTING GARAGE INTO HABITABLE ROOM. ERECTION OF A SIDE EXTENSION TO PROVIDE A GARAGE (AMENDED PLANS DATED 18/10/02)
Median price across the last 5 sales in SL1 6ET: £545,000 (2020–2016).
An AI-written breakdown of everything that matters
Detailed EPC data
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Full planning history
Every application and decision on record
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Street avg 4.6 t/year
Habitable Rooms
8 rooms
Street avg 6 rooms
SL1 6JH
Closest school
0.2 km
Priory School. 20 schools nearby.
Night-time· 23:00 – 07:00
40.0dB