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21 Castle View, Tongwynlais, Cardiff, CF15 7LY

Property type
Semi-detached
Floor Ground
Habitable rooms
3
From EPC
Floor area
35 m²
377 sq ft
Energy rating
C
Score 72
Council tax
Band C
Tenure
Social Rental
Overview

About 21 Castle View

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

21 Castle View is a semi-detached house in Tongwynlais, Cardiff, Cardiff (CF15 7LY). It has a recorded floor area of 35 m² (around 377 sq ft), construction records dating it to 1950-1966 and council tax band C. At 35 m² this is the smallest unit on EPC record across the building (35–101 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (January 2017) shows a C (score 72). When first surveyed in February 2009 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Good, hot-water efficiency went from Average to Good and main heating went from Average to Good.

At 35 m² it sits well below the postcode median (64 m² across 23 EPCs), making it one of the more compact homes locally.

Before you decide

Everything you need to know about 21 Castle View

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

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.

21 Castle View's carbon output is low for the local stock.

Current Certificate(1 of 2)
Jan 2017

EPC Rating

A
B
C
C72
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
1.4 t/year
Occupancy
Rented

Property Improvements

Changes detected from historical EPC data

Jan 2017from Feb 2009
EPC improved fromD57toC72
Heating Controls
Prog + StatFull

Heating controls upgraded for better temperature management

Hot Water
AverageGood

Hot water efficiency improved

Wall Insulation
UninsulatedInsulated Cavity

Cavity wall insulation installed

SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Mid 20th centuryGround Floor FlatEPC C

We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.

From £495 · Includes VAT

Planning

Planning history

Applications and permits filed against 21 Castle View, Tongwynlais, Cardiff, CF15 7LY, sourced from the PlanIt planning register.

21 Castle View has no planning applications on record.

1

But the area is active

1 notable application 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.

21 Castle View has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.

Current estimate

£141,000

Modelled from EPC, postcode comparables.

See how we calculated this

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 CF15 7LY: £178,000 (2025–2021).

On the street

Versus other Castle View homes

Four headline reads against 18 similar flats on this street, drawn from the latest EPC and Land Registry data.

21 Castle View is notably below the street on floor area.

EPC Rating

72 (C)

Street avg 70 (C)

Above

Floor Area

35 m²

Street avg 62 m²

Strongly below

CO₂ Emissions

1.4 t/year

Street avg 2.4 t/year

Strongly above

Habitable Rooms

3 rooms

Street avg 3 rooms

On par
Before you decide

Everything you need to know about 21 Castle View

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

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.
£163k

1 Beech Court, Catherine Drive, Tongwynlais

CF15 7JU

£184k

1 Ffordd Y Felin, Old Caerphilly Road, Nantgarw

CF15 7TA

£213k

1 Catherine Drive, Tongwynlais

CF15 7JT

£219k

1 Castle Street, Taffs Well

CF15 7RL

2 bed1 bath
£220k

1 Church Street, Taffs Well

CF15 7PG

3 bed
£235k

1 Anchor Street, Taffs Well

CF15 7RH

2 bed1 bath
£260k

1 Abbey Close, Taffs Well

CF15 7RS

£269k

1 Castell Coch View, Tongwynlais

CF15 7LA

2 bed1 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

Crime

2/mo

Steady year-on-year across the wider district.

Nearest stop

0.1 km

Cwm Gwynlais — 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 21 Castle View, Tongwynlais, Cardiff, CF15 7LY. Each answer is also embedded as structured data for search engines.