21 Grenfell Town, Bonymaen, Swansea, SA1 7AE
About 21 Grenfell Town
21 Grenfell Town is a mid-terrace house in Bonymaen, Swansea, Swansea (SA1 7AE). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (September 2013) shows an E (score 44), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 82), a 3-band jump. The latest certificate is from September 2013, so improvements made since then won't be reflected.
Held since February 1997 — that's 29 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £114,000 sits 216.7% above the 1997 sale of £36,000. On a £-per-square-foot basis, the last sale (£41/sq ft) was about 60.8% below the postcode norm. At 82 m² it's 20.6% larger than the typical home in the postcode (68 m² median across 19 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 84% of similar EPCs).
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 24 Sept 2023
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
21 Grenfell Town has no planning applications on record.
But the area is active
3 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21 Grenfell Town's estimated value is more than triple its earliest registered sale price (1997).
£114,000
Modelled from EPC, postcode comparables.
£36,000
Recorded with HM Land Registry.
Sales timeline
24 February 1997Most recent
£36,000
Median price across the last 5 sales in SA1 7AE: £87,000 (2025–2022).
Nearby sales in SA1 7AE
9 Grenfell Town, Bonymaen, Swansea, SA1 7AE
Sold Jul 2025
£130,00019 Grenfell Town, Bonymaen, Swansea, SA1 7AE
Sold Oct 2024
£90,00026 Grenfell Town, Bonymaen, Swansea, SA1 7AE
Sold Aug 2024
£86,00017 Grenfell Town, Bonymaen, Swansea, SA1 7AE
Sold Nov 2023
£75,0002 Grenfell Town, Bonymaen, Swansea, SA1 7AE
Sold Feb 2022
£87,000
Versus other Grenfell Town homes
21 Grenfell Town is notably below the street on price per m².
Price per m²
£439
Street avg £1,257
Floor Area
82 m²
Street avg 68 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
5.1 t/year
Street avg 3.4 t/year
Similar properties nearby
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1 Clyro Court, Winch Wen
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1 Caernarvon Way, Bonymaen
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1 Britannia Apartments, Phoebe Road, Copper Quarter, Pentrechwyth
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1 Candleston Place, Bonymaen
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The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Pentrechwyth Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







