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1 Blackweir Cottages, Cardiff Castle Grounds, Blackweir, Cardiff, CF10 3EA

Property type
End terrace
Habitable rooms
7
From EPC
Floor area
115 m²
1238 sq ft
Energy rating
D
Score 65
Council tax
Band F
Tenure
Private Rental
Overview

About 1 Blackweir Cottages

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

1 Blackweir Cottages is an end-of-terrace house in Blackweir, Cardiff, Cardiff (CF10 3EA). It has a recorded floor area of 115 m² (around 1238 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (November 2025) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in April 2009 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good and window efficiency went from Very Poor to Average; while lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 80).

Held since December 2005 — that's 20 years off the open market, well above the local norm. At 115 m² the property is well over the postcode median (77 m² across 3 EPCs), placing it in the larger end of the local stock. Across 2003–2005, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £383,000 sits 59.6% above the 2005 sale of £240,000.

Before you decide

Everything you need to know about 1 Blackweir Cottages

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

Signs of HMO activity in the area

Pick your report · every report is £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.
Current Certificate(1 of 2)
Nov 2025

EPC Rating

A
B
C
D
D65
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
4.6 t/year
Occupancy
Rented

Property Improvements

Changes detected from historical EPC data

Nov 2025from Apr 2009
EPC improved fromF38toD65
Windows
SingleFull Double

Single glazing replaced with double or better glazing

Roof Insulation
UninsulatedInsulated

Roof insulation improved

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Victorian-eraEnd-Terrace HouseEPC DPre-1919 build

Because the property was built before 1919, we believe a Level 3 building survey should be considered.

From £955 · Includes VAT

Planning

Planning history

Applications and permits filed against 1 Blackweir Cottages, Cardiff Castle Grounds, Blackweir, Cardiff, CF10 3EA, sourced from the PlanIt planning register.

1 Blackweir Cottages has no planning applications on record.

6

But the area is active

6 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.

1 Blackweir Cottages valuation sits well clear of the typical sold price in this postcode.

Current estimate

£383,000

Modelled from EPC, postcode comparables and a sale-price growth of 7.5% per year over 3 years.

See how we calculated this
Last sold (2005)

£240,000

Growth on file: 7.5% per year over 3 years.

Sales timeline

  1. 16 December 2005Most recent

    £240,000

    +22.4%over 2 years

  2. 28 February 2003

    £196,000

Median price across the last 4 sales in CF10 3EA: £122,000 (2019–1997).

On the street

Versus other Cardiff Castle Grounds homes

Four headline reads against 3 similar houses on this street, drawn from the latest EPC and Land Registry data.

1 Blackweir Cottages outperforms the street on habitable rooms by a wide margin.

EPC Rating

65 (D)

Street avg 49 (E)

Above

Floor Area

115 m²

Street avg 109 m²

Above

CO₂ Emissions

4.6 t/year

Street avg 4.2 t/year

Below

Habitable Rooms

7 rooms

Street avg 5 rooms

Strongly above
Before you decide

Everything you need to know about 1 Blackweir Cottages

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

Signs of HMO activity in the area

Pick your report · every report is £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.
£376k

1 Colum Road

CF10 3EE

2 bed2 bath
£357k

10 Colum Road

CF10 3EG

1 bed1 bath
£307k

108 North Road

CF10 3DZ

£256k

102 North Road

CF10 3DZ

£246k

100a, North Road

CF10 3DZ

1 bed
£233k

1 Colum Place

CF10 3EP

£225k

1 Lock Keepers Court, Blackweir Terrace

CF10 3EZ

2 bed2 bath
£707k

10 Queen Anne Square

CF10 3ED

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

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

0.2 km

Colum Road — 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 Blackweir Cottages, Cardiff Castle Grounds, Blackweir, Cardiff, CF10 3EA. Each answer is also embedded as structured data for search engines.