Model valuation£417,0008 Busby Close
Local market context
21 Sirius Apartments is a one-bedroom end-of-terrace house in Pentrechwyth, Swansea, Swansea (SA1 7GA). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to 2012 onwards and council tax band C. Tenure is freehold. The latest certificate (June 2024) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since April 2014. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 86). Main heating runs on electricity. At 38 m² this is the 8th smallest of 38 units on EPC record in the building, where floor areas span 34–81 m². The building's EPC ratings span D to B across 38 units on file. The home occupies a corner plot.
Across 2014–2024, sale prices on this property compounded at -1.9% per year. Today's modelled estimate of £104,000 is 24.6% above the 2024 sale price. Last sale on file: £83,500 in January 2024.
21 Sirius Apartments's carbon output is low for the local stock.
Certificate validity
Valid until 26 June 2034
Get a survey for this property
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
21 Sirius Apartments 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.
21 Sirius Apartments saw 3 transfers in just over a decade — high turnover for the postcode.
£104,000
Modelled from EPC, postcode comparables and a sale-price growth of -1.9% per year over 10 years.
£83,500
Growth on file: -1.9% per year over 10 years.
12 January 2024Most recent
£83,500
-15.7%over 3 years4 June 2020
£99,000
-1.0%over 6 years22 May 2014
£100,000
Median price across the last 5 sales in SA1 7GA: £92,000 (2025–2024).
25 Sirius Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7GA
Sold Dec 2025
11 Sirius Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7GA
Sold Sept 2025
34 Sirius Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7GA
Sold Aug 2025
2 Sirius Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7GA
Sold Dec 2024
4 Sirius Apartments, Phoebe Road, Copper Quarter, Pentrechwyth, Swansea, SA1 7GA
Sold Oct 2024
On years held, 21 Sirius Apartments runs well behind the street norm.
Price per m²
£2,197
Street avg £2,411
Floor Area
38 m²
Street avg 49 m²
Habitable Rooms
2 rooms
Street avg 2 rooms
CO₂ Emissions
1.1 t/year
Street avg 1.4 t/year
Property research, connected
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Crime
580/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Morfa Retail Park — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.