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21 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF

1 planning record
Property type
Mid terrace
Habitable rooms
5
From EPC
Floor area
101 m²
1087 sq ft
Energy rating
D
Score 65
Council tax
Band B
Tenure
Private Rental
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Overview

About 21 Merthyr Road

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

21 Merthyr Road is a mid-terrace house in Tongwynlais, Cardiff, Cardiff (CF15 7LF). It has a recorded floor area of 101 m² (around 1087 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (June 2026) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in May 2016 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, roof efficiency went from Good to Very Good and lighting went from Average to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to C (score 75). This certificate was lodged in the last six months, so the rating reflects current condition.

One historical planning record sits against the property in 2018.

Before you decide

Everything you need to know about 21 Merthyr Road

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

Pick your report · from £14.99

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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.

The EPC has just been inspected, so the rating reflects current condition.

Current Certificate(1 of 2)
Jun 2026

EPC Rating

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

Certificate validity

Valid until 21 June 2036

9 years remaining

Property Improvements

Changes detected from historical EPC data

Jun 2026from May 2016
EPC improved fromE53toD65
Hot Water
Very GoodGood

Hot water efficiency decreased

Walls
Very PoorPoor

Wall insulation improved

Roof Insulation
InsulatedWell Insulated

Loft insulation upgraded to recommended levels

Low Energy Lighting
29%100%

More low energy lighting installed

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Victorian-eraMid-Terrace HouseEPC DPre-1919 buildExtended multiple times (2+ extensions)

Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.

From £885 · Includes VAT

Planning

Planning history

Applications and permits filed against 21 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF, sourced from the PlanIt planning register.

1 application on record at 21 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF

1decisions6documents1nearby
  1. Nov 2018
    Full
    Outcome in report

    CHANGE FROM POST OFFICE TO SANDWICH SHOP

    Documents
    6 docs on file
    Reference
    18/02193/MNR
    Full record in report

Unlock 21 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (1 on record)
  • All 1 application on this property in full, plus 1 notable nearby
  • The 6 documents, officer reports & conditions
  • What the pattern means for extending or converting here
£14.99one-off · instant

One time fee only - money back guarantee

Price

Sales history & valuation

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

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

Current estimate

£227,000

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 7LF: £237,500 (2026–2022).

On the street

Versus other Merthyr Road homes

Four headline reads against 10 similar houses on this street, drawn from the latest EPC and Land Registry data.

21 Merthyr Road outperforms the street on co₂ emissions by a wide margin.

EPC Rating

65 (D)

Street avg 62 (D)

Above

Floor Area

101 m²

Street avg 107 m²

Above

CO₂ Emissions

3.6 t/year

Street avg 4.8 t/year

Strongly above

Habitable Rooms

5 rooms

Street avg 5 rooms

On par
Before you decide

Everything you need to know about 21 Merthyr Road

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

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.
£227k

1 Anchor Street, Taffs Well

CF15 7RH

2 bed1 bath
£223k

1 Castle Street, Taffs Well

CF15 7RL

2 bed1 bath
£220k

1 Church Street, Taffs Well

CF15 7PG

3 bed
£204k

1 Catherine Drive, Tongwynlais

CF15 7JT

£260k

1 Abbey Close, Taffs Well

CF15 7RS

£262k

1 Castell Coch View, Tongwynlais

CF15 7LA

2 bed1 bath
£275k

1 Beechwood Road, Taffs Well

CF15 7RZ

4 bed
£279k

1 Castle Road, Tongwynlais

CF15 7JQ

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

85/mo

Steady year-on-year across the wider district.

Nearest stop

0.0 km

St Michael`s Close — 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 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF. Each answer is also embedded as structured data for search engines.