21 Forbes Street, Plasmarl, Swansea, SA6 8JZ
About 21 Forbes Street
21 Forbes Street is a detached house in Plasmarl, Swansea, Swansea (SA6 8JZ). It has a recorded floor area of 185 m² (around 1991 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (June 2014) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 3 certificates since December 2012. Between certificates, roof efficiency went from Very Poor to Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 86), a 2-band jump. The latest certificate is from June 2014, so improvements made since then won't be reflected.
At 185 m² the property is well over the postcode median (79 m² across 9 EPCs), placing it in the larger end of the local stock.
Energy performance
21 Forbes Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 01 Jun 2024
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Roof insulation improved
Hot water efficiency improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
21 Forbes Street 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
21 Forbes Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£262,000
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 5 sales in SA6 8JZ: £78,500 (2020–2015).
Nearby sales in SA6 8JZ
10 Forbes Street, Plasmarl, Swansea, SA6 8JZ
Sold Aug 2020
£104,00017 Forbes Street, Plasmarl, Swansea, SA6 8JZ
Sold Jun 2020
£85,0005 Forbes Street, Plasmarl, Swansea, SA6 8JZ
Sold Nov 2018
£60,0004 Forbes Street, Plasmarl, Swansea, SA6 8JZ
Sold May 2018
£58,00016 Forbes Street, Plasmarl, Swansea, SA6 8JZ
Sold Mar 2007
£99,950
Versus other Forbes Street homes
On floor area, 21 Forbes Street stands well clear of the street.
EPC Rating
68 (D)
Street avg 62 (D)
Floor Area
185 m²
Street avg 74 m²
CO₂ Emissions
6.1 t/year
Street avg 3.4 t/year
Habitable Rooms
11 rooms
Street avg 4 rooms
Similar properties nearby
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Cwm Level — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







