Blackweir House, Flat 5, Blackweir Terrace, Cardiff, CF10 3EQ
About Blackweir House
Blackweir House is a mid-terrace house in Cardiff (CF10 3EQ). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 2012 onwards and council tax band E. At 32 m² this is the smallest unit on EPC record across Blackweir House (32–41 m²). On EPC score it ranks first in the building (79 versus a worst of 69). The latest certificate (June 2022) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (May 2012); the latest reading is one band lower. Between certificates, wall efficiency went from Good to Very Good. The recommended improvements would push it to B (score 87). Main heating runs on electricity.
At 32 m² it sits well below the postcode median (82 m² across 34 EPCs), making it one of the more compact homes locally.
Energy performance
Blackweir House's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Wall insulation improved
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
Blackweir House has no planning applications on record.
But the area is active
6 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Blackweir House has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£186,000
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 CF10 3EQ: £314,000 (2024–2022).
Nearby sales in CF10 3EQ
33 Blackweir Terrace, Cardiff, CF10 3EQ
Sold Apr 2024
£360,00045 Blackweir Terrace, Cardiff, CF10 3EQ
Sold Feb 2023
£290,00015 Blackweir Terrace, Cardiff, CF10 3EQ
Sold Oct 2022
£445,00041 Blackweir Terrace, Cardiff, CF10 3EQ
Sold May 2022
£230,55257 Blackweir Terrace, Cardiff, CF10 3EQ
Sold Jan 2022
£314,000
Versus other Blackweir Terrace homes
EPC Rating for Blackweir House runs comfortably ahead of the street norm.
EPC Rating
79 (C)
Street avg 72 (C)
Floor Area
32 m²
Street avg 38 m²
CO₂ Emissions
1.0 t/year
Street avg 1.4 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
10/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Blackweir — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







