Skip to content
UK Property Looker

1 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG

Property type
Mid terrace
Floor 00
Bedroom
1
Bathroom
1
Floor area
40 m²
431 sq ft
Energy rating
C
Score 76
Council tax
Band D
Tenure
Owner Occupied
Overview

About 1 St James Mansions

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

1 St James Mansions is a one-bedroom mid-terrace house in Cardiff (CF10 5LG). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to 2007-2011 and council tax band D. At 40 m² this is the smallest unit on EPC record across 1 St James Mansions (40–77 m²). The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (76 versus a worst of 65). The latest certificate (January 2023) shows a C (score 76), near the top of the C band. When first surveyed in January 2009 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Average to Good and lighting went from Poor to Very Good. The recommended improvements would push it to B (score 84). Main heating runs on electricity.

It hasn't traded since June 2002, a hold of 24 years that's notably long for the area. Today's modelled estimate of £140,000 sits 75% above the 2002 sale of £80,000. At 40 m² it sits well below the postcode median (59 m² across 23 EPCs), making it one of the more compact homes locally.

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms1
  • Bathrooms1
Before you decide

Everything you need to know about 1 St James Mansions

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

Pick your report · from £14.99

One time fee only - money back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

1 St James Mansions's carbon output is low for the local stock.

Current Certificate(1 of 2)
Jan 2023

EPC Rating

A
B
C
C76
D
E
F
G
Main Heating
Electric
Main Fuel
Electric
Hot Water
Average
Windows
Good
CO2 Emissions
1.3 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 23 January 2033

6 years remaining

Property Improvements

Changes detected from historical EPC data

Jan 2023from Jan 2009
EPC improved fromE52toC76
Heating Controls
Prog + StatThermostat

Heating controls changed

Windows
AverageGood

Window efficiency improved

Floor Insulation
PartialInsulated

Floor insulation added or improved

Low Energy Lighting
17%100%

More low energy lighting installed

SDL Surveying

Get a survey for this property

Level 3 Building Survey

21st centuryGround Floor FlatEPC CNo mains gas

Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.

From £820 · Includes VAT

Planning

Planning history

Applications and permits filed against 1 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG, sourced from the PlanIt planning register.

1 St James Mansions has no planning applications on record.

5

But the area is active

5 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Current estimate

£140,000

Modelled from EPC, postcode comparables.

See how we calculated this
Last sold (2002)

£80,000

Recorded with HM Land Registry.

Sales timeline

  1. 19 June 2002Most recent

    £80,000

Median price across the last 5 sales in CF10 5LG: £155,000 (2020–2015).

On the street

Versus other Mount Stuart Square homes

Four headline reads against 23 similar flats on this street, drawn from the latest EPC and Land Registry data.

1 St James Mansions outperforms the street on years held by a wide margin.

Price per m²

£2,000

Street avg £2,144

On par

Floor Area

40 m²

Street avg 59 m²

Strongly below

Habitable Rooms

2 rooms

Street avg 3 rooms

Below

CO₂ Emissions

1.3 t/year

Street avg 2.2 t/year

Strongly above
Before you decide

Everything you need to know about 1 St James Mansions

The true value, the hidden risks and the full sale history, in one report.

Larger development activity nearby

Pick your report · from £14.99

One time fee only - money back guarantee

Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£132k

1 Hansen Court, Heol Glan Rheidol

CF10 5NX

1 bed1 bath
£150k

1 Clarence Mews, Clarence Embankment

CF10 5GF

1 bed1 bath
£122k

1 Heol Staughton

CF10 5FS

1 bed1 bath
£184k

1 Clarence Court, Pomeroy Street

CF10 5GT

1 bed1 bath
£160k

1 Carlotta Way

CF10 5FY

2 bed
£400k

1 Harbour Point, Stuart Street

CF10 5BW

1 bed
£227k

1 Ezel Court, Heol Glan Rheidol

CF10 5NS

2 bed2 bath
£254k

1 Empire House, Mount Stuart Square

CF10 5LR

2 bed2 bath
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Cardiff district page.
Full Cardiff report

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.

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 1 St James Mansions, Mount Stuart Square, Cardiff, CF10 5LG. Each answer is also embedded as structured data for search engines.