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21 Blackbirds Way, St Mellons, Cardiff, CF3 5RE

Extendable3 sales on record

Estimated value

£126,000

  • Since the 2006 sale (£82,000)+54%
  • Against CF3 5RE's recent median (£215,000)-41%

Newest record on this page: February 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
End terrace
Floor 01
Bedrooms
3
Bathroom
1
Floor area
71 m²
764 sq ft
Energy rating
C
Score 70
Council tax
Band B
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£126,000

  • Against its 2006 sale (£82,000)+54%
  • Against CF3 5RE's recent median (£215,000)-41%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Blackbirds Way is modelled from its 71 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in CF3 5RE. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    71 m² from the EPC lodged in February 2026

  • Sales of this home

    3 sales recorded, the latest in 2006

  • Recent sales in CF3 5RE

    5 sales, median £215,000 (2025–2014)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: August 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

21 Blackbirds Way has more than quadrupled in price since its earliest registered sale in 1999.

Sales timeline

  1. 19 October 2006Most recent

    £82,000

    +69.1%over 3 years

  2. 29 November 2002

    £48,500

    +602.9%over 3 years

  3. 29 July 1999

    £6,900

Median price across the last 5 sales in CF3 5RE: £215,000 (2025–2014).

Risks

What this page doesn't show

Nothing is flagged from the data on this page, but these checks are only run in the report. The detail, evidence and what to ask about it are in the Risks Report.
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

One time fee only - money back guarantee

Overview

About 21 Blackbirds Way

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

21 Blackbirds Way is a three-bedroom end-of-terrace house in St. Mellons, Cardiff, Cardiff (CF3 5RE). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1976-1982 and council tax band B. The latest certificate (February 2026) shows a C (score 70). When first surveyed in December 2009 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good and lighting went from Poor to Average. This certificate was lodged in the last six months, so the rating reflects current condition. Our model identifies extension potential, subject to local planning policy.

Held since October 2006 — that's 20 years off the open market, well above the local norm. Across 1999–2006, sale prices on this property compounded at 40.9% per year. Today's modelled estimate of £126,000 sits 53.7% above the 2006 sale of £82,000. On a £-per-square-foot basis, the last sale (£107/sq ft) was about 36.2% above the typical sold price in the postcode. At 71 m² it's 18.4% smaller than the typical home in the postcode (87 m² median across 27 EPCs).

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

  • Bedrooms3
  • Bathrooms1

Building

  • Extension potentialPossible
Before you decide

Everything you need to know about 21 Blackbirds Way

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

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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 3)
Feb 2026

EPC Rating

A
B
C
C70
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
1.6 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 27 February 2036

9 years remaining

Property Improvements

Changes detected from historical EPC data

Dec 2015from Dec 2009
EPC improved fromD67toC77
Wall Insulation
Partial InsulationInsulated Cavity

Wall insulation upgraded

Roof Insulation
InsulatedWell Insulated

Loft insulation upgraded to recommended levels

Low Energy Lighting
11%90%

More low energy lighting installed

Planning

Planning history

Applications and permits filed against 21 Blackbirds Way, St Mellons, Cardiff, CF3 5RE, sourced from the PlanIt planning register.

21 Blackbirds Way has no planning applications on record.

A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.

On the street

Versus other Blackbirds Way homes

Four headline reads against 11 similar flats on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 21 Blackbirds Way runs well behind the street norm.

EPC Rating

70 (C)

Street avg 75 (C)

Strongly below

Floor Area

71 m²

Street avg 66 m²

On par

CO₂ Emissions

1.6 t/year

Street avg 1.8 t/year

Above

Habitable Rooms

4 rooms

Street avg 3 rooms

Strongly above
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

242/mo

Falling year-on-year across the wider district.

Nearest stop

0.2 km

Bluebell Drive — bus stop.

Nearest stops

  • Bluebell DriveBus stop207m
  • Okehampton AvenueBus stop241m
  • Bluebell DriveBus stop266m
  • Tyrwinch RoadBus stop324m

Most reported crime locally

  • Violence & Sexual Offences1,550 reports36%
  • Anti-social Behaviour627 reports14%
  • Public Order468 reports11%
  • Criminal Damage & Arson424 reports10%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Late 20th century1st Floor MaisonetteEPC 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

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£150k

1 Bluebell Drive

CF3 5RA

3 bed
£197k

1 Banwell Place, Llanrumney

CF3 5SH

3 bed
£200k

1 Bronte Close, Llanrumney

CF3 5PN

3 bed
£264k

1 Brendon Close, Llanrumney

CF3 5RJ

3 bed1 bath
£269k

1 Axbridge Crescent, Llanrumney

CF3 5TJ

3 bed
£443k

1 Chapel Row Lane, Old St Mellons

CF3 5ST

3 bed
£263k

1 Captain S View, Braunton Crescent, Llanrumney

CF3 5AD

2 bed1 bath
£538k

1 Courtenay Close, Old St Mellons

CF3 5UL

4 bed2 bath

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 21 Blackbirds Way is modelled from its 71 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in CF3 5RE. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 3 sales are recorded for 21 Blackbirds Way. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 21 Blackbirds Way was lodged in February 2026 at band C and is valid until February 2036. 3 certificates are on record, which shows how the home has changed.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 21 Blackbirds Way. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 18 months, which places each incident at an approximate point. Schools and stops are measured in a straight line from CF3 5RE.
Council tax band
21 Blackbirds Way is in council tax band B. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Blackbirds Way, St Mellons, Cardiff, CF3 5RE. Each answer is also embedded as structured data for search engines.

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