8 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
About 8 St James Mansions
8 St James Mansions is a mid-terrace house in Cardiff (CF10 5LG). It has a recorded floor area of 78 m² (around 840 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (July 2020) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since February 2010. Between certificates, lighting went from Poor to Very Good and main heating went from Very Poor to Average; while wall efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 84). Main heating runs on electricity.
At 78 m² the property is well over the postcode median (54 m² across 23 EPCs), placing it in the larger end of the local stock. On the market in February 2017 and unlisted since — roughly 9 years. Across the public record there are 4 sales, relatively high churn for a single property. Across 2002–2017, sale prices on this property compounded at 1.4% per year. Today's modelled estimate of £203,000 is 23% above the 2017 sale price.
Energy performance
EPC Rating
Certificate validity
Valid until 8 July 2030
Property Improvements
Changes detected from historical EPC data
Heating system upgraded to a more efficient system
Heating controls changed
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has no mains gas supply, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
8 St James Mansions 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
Latest sale on 8 St James Mansions was the highest on Land Registry record across the postcode.
£203,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.4% per year over 15 years.
£165,000
Growth on file: 1.4% per year over 15 years.
Sales timeline
24 February 2017Most recent
£165,000
-5.7%over 9 years25 October 2007
£175,000
+8.0%over 3 years22 July 2004
£162,000
+20.0%over 2 years26 June 2002
£135,000
Median price across the last 5 sales in CF10 5LG: £149,000 (2020–2015).
Nearby sales in CF10 5LG
20 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
Sold Oct 2020
£155,00019 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
Sold Sept 2020
£157,0005 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
Sold Dec 2019
£140,00016 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
Sold Jul 2015
£139,00027 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG
Sold Mar 2015
£138,000
Versus other Mount Stuart Square homes
On co₂ emissions, 8 St James Mansions runs well behind the street norm.
Price per m²
£2,115
Street avg £2,139
Floor Area
78 m²
Street avg 58 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
3.1 t/year
Street avg 2.1 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
485/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Dumballs Road Bottom — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







