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Get startedFlat 1, 1 William Street, Slough, SL1 1GZ
About Flat 1
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
Flat 1 is an end-of-terrace house in Slough (SL1 1GZ). It has a recorded floor area of 36 m² (around 388 sq ft). At 36 m² this is the smallest unit on EPC record across the building (36–62 m²). The building's EPC ratings span C to B, with this unit at the bottom. On EPC score it ranks last in the building (80 versus a best of 84). The latest certificate (January 2021) shows a C (score 80), near the top of the C band.
At 36 m² it's 16.3% smaller than the typical home in the postcode (43 m² median across 63 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Sale prices here have lagged Slough HPI: -59.8% per year against 0% for the wider region. On a £-per-square-foot basis, the last sale (£519/sq ft) was about 15.5% above the typical sold price in the postcode. Last sale on file: £201,152 in January 2022. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Flat 1 sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
A
B
C
C80
D
E
F
G
Main Heating
—
Main Fuel
—
Hot Water
Good
Windows
Very Good
CO2 Emissions
0.8 t/year
Occupancy
—
Sales history & valuation
Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Flat 1 changed hands twice within eighteen months — unusual for the area.
Current estimate
See how we calculated this£195,000
Modelled from EPC, postcode comparables and a sale-price growth of -59.8% per year over 1 year.
Last sold (2022)
£201,152
Growth on file: -59.8% per year over 1 year.
Sales timeline
Full property reportLaunch offer · 33% off
The complete analysis of Flat 1, 1 William Street, Slough, SL1 1GZ
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
Versus other William Street homes
Four headline reads against 63 similar flats on this street, drawn from the latest EPC and Land Registry data.
On epc rating, Flat 1 runs well behind the street norm.
Price per m²
£5,588
Street avg £4,625
Floor Area
36 m²
Street avg 49 m²
CO₂ Emissions
0.8 t/year
Street avg 0.8 t/year
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Slough district page.
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
Wellington Street stop E — bus stop.
Road noise across the postcode
Modelled day and night-time noise levels around SL1 1GZ from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
53.8dB
Everything within walking distance
Schools, transport stops and scenic spots near this property — 61 points of interest in total.
Common questions
The questions buyers, sellers and homeowners most often ask about Flat 1, 1 William Street, Slough, SL1 1GZ. Each answer is also embedded as structured data for search engines.