15 20, Apartment 3, Castle Street, Swansea, SA1 1JF
About 15 20
15 20 is a detached house in Swansea (SA1 1JF). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 2021. At 42 m² this is the smallest unit on EPC record across 15 20 (42–86 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (June 2021) shows a D (score 68), on the cusp of jumping into the C band. Main heating runs on electricity: electricity, unspecified tariff.
At 42 m² it sits well below the postcode median (62 m² across 21 EPCs), making it one of the more compact homes locally.
Everything you need to know about 15 20
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Energy performance
EPC Rating
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Planning history
15 20 has no planning applications on record.
But the area is active
7 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
15 20 has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£144,000
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 1 sales in SA1 1JF: £295,000 (2020–2020).
Nearby sales in SA1 1JF
Versus other Castle Street homes
Floor Area for 15 20 lags the street by a wide margin.
EPC Rating
68 (D)
Street avg 65 (D)
Floor Area
42 m²
Street avg 60 m²
CO₂ Emissions
1.7 t/year
Street avg 2.3 t/year
Everything you need to know about 15 20
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
High Street 1 — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.