What type of property is 20 Allen Close, CF3 5DH?

20 Allen Close, CF3 5DH is a 3-bedroom detached house.

What did 20 Allen Close, CF3 5DH sell for?

20 Allen Close, CF3 5DH last sold for £195,000 in April 2024, around 2 years ago. Land Registry has 5 sales on record going back to £81,000 in November 1997. Source: HM Land Registry.

Has 20 Allen Close, CF3 5DH appreciated in value?

Across 5 sales between November 1997 and April 2024, 20 Allen Close, CF3 5DH rose from £81,000 to £195,000, a change of £114,000. That works out to roughly +3.4% per year compounded over 26 years. Source: HM Land Registry.

What is the EPC rating for 20 Allen Close, CF3 5DH?

The current EPC rating for 20 Allen Close, CF3 5DH is C with a score of 76 out of 100, lodged in April 2024. It has improved from a D recorded in October 2008. The assessor estimates the property could reach a B. Source: EPC Register.

What is the floor area of 20 Allen Close, CF3 5DH?

20 Allen Close, CF3 5DH has a recorded floor area of 55 m² (592 sq ft), around 18 m² per bedroom. That makes it about 47% smaller than the median EPC-recorded property in CF3 5DH. Source: EPC Register.

How is 20 Allen Close, CF3 5DH heated?

The latest EPC at 20 Allen Close, CF3 5DH records mains gas as the main heating fuel. Source: EPC Register.

Are there any planning records for 20 Allen Close, CF3 5DH?

20 Allen Close, CF3 5DH has council approval for two-storey extension granted in October 2014 under ref. 14/01235/DCH. Source: PlanIt planning register.

What council tax band is 20 Allen Close, CF3 5DH?

20 Allen Close, CF3 5DH is in council tax band E.

Where is 20 Allen Close, CF3 5DH located?

20 Allen Close, CF3 5DH sits in Old St. Mellons, Cardiff, Cardiff. It falls within the CF3 postcode district.

How safe is the area around 20 Allen Close, CF3 5DH?

Police records around 20 Allen Close, CF3 5DH show an average of 3 reported crimes per month over the last 13 months. Violent crime makes up roughly 48% of reports, the most common category. The overall trend is rising (210% versus the prior period). Source: Police UK.

How well connected is 20 Allen Close, CF3 5DH?

The closest bus stop to 20 Allen Close, CF3 5DH is Llaneirwg Way, 176m away. In total there are 30 bus stops within the surrounding area.

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20 Allen Close, Old St Mellons, Cardiff, CF3 5DH

5 sales on record2 planning records

Property type

Detached

Bedrooms

Bathroom

Floor area

55 m²

592 sq ft

Energy rating

Score 76

Council tax

Band E

Tenure

Owner Occupied

Overview

About 20 Allen Close

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

20 Allen Close is a three-bedroom detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 1996-2002 and council tax band E. The latest certificate (April 2024) shows a C (score 76), near the top of the C band. When first surveyed in October 2008 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 91).

At 55 m² it sits well below the postcode median (99 m² across 24 EPCs), making it one of the more compact homes locally. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include a loft conversion, an extension and a porch, meaningful when judging how the property has evolved. Across 1997–2024, sale prices on this property compounded at 3.4% per year. Today's modelled estimate of £238,000 is 22.1% above the 2024 sale price. On a £-per-square-foot basis, the last sale (£329/sq ft) was about 154.5% above the typical sold price in the postcode. Last sale on file: £195,000 in April 2024.

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

Outside

Private gardenYes

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Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

20 Allen Close's carbon output is low for the local stock.

Current Certificate(1 of 5)

Apr 2024

EPC Rating

C76

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Good

CO2 Emissions

1.5 t/year

Occupancy

Owner Occupied

Property Improvements

Changes detected from historical EPC data

Oct 2013from Aug 2010

EPC improved fromD64toE54

Hot Water

Main SystemImmersion

Hot water system changed

Floor Insulation

UninsulatedPartial

Floor insulation added or improved

Ventilation

NaturalExtract

Mechanical ventilation installed

Feb 2014from Oct 2013

Low Energy Lighting

18%91%

More low energy lighting installed

Apr 2024from Feb 2014

EPC improved fromE53toC76

Heating Controls

Prog + StatFull

Heating controls upgraded for better temperature management

Hot Water

ImmersionMain System

Hot water system upgraded

Windows

AverageGood

Window efficiency improved

Roof Insulation

PartialInsulated

Roof insulation improved

Floor Insulation

PartialInsulated

Floor insulation added or improved

Ventilation

ExtractNatural

Ventilation system changed

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Late 20th centuryDetached HouseEPC C

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Planning

Planning history

Applications and permits filed against 20 Allen Close, Old St Mellons, Cardiff, CF3 5DH, sourced from the PlanIt planning register.

2 applications on record at 20 Allen Close, Old St Mellons, Cardiff, CF3 5DH

2decisions2extensions71documents

Oct 2014
PorchFull
Outcome in report
Extension: Two storey
PROPOSED REMOVAL OF EXISTING SIDE ATTACHED GARAGE. PROPOSED TWO STOREY SIDE AND REAR EXTENSION. REAR EXTENSION TO HAVE A FIXED PERGOLA. THE EXISTING FRONT PORCH IS TO BE EXTENDED.
Extension
Documents
59 docs on file
Reference
14/01235/DCH
Full record in report
More recent applications — locked
Loft ConversionNov 2015Decision

Unlock 20 Allen Close, Old St Mellons, Cardiff, CF3 5DH's full planning history

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Every decision — granted, refused or withdrawn (2 on record)
All 2 applications on this property in full
The 71 documents, officer reports & conditions
What the pattern means for extending or converting here

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Price

Sales history & valuation

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

20 Allen Close has more than doubled in price since the earliest registered sale in 1997.

Current estimate

£238,000

Modelled from EPC, postcode comparables and a sale-price growth of 3.4% per year over 26 years.

See how we calculated this

Last sold (2024)

£195,000

Growth on file: 3.4% per year over 26 years.

Sales timeline

17 April 2024Most recent
£195,000
16 September 2010
£195,000
+14.7%over 5 years
28 January 2005
£169,950
+99.9%over 4 years
18 May 2000
£85,000
+4.9%over 2 years
7 November 1997
£81,000

Median price across the last 5 sales in CF3 5DH: £258,000 (2025–2020).

Nearby sales in CF3 5DH

On the street

Versus other Allen Close homes

Four headline reads against 24 similar houses on this street, drawn from the latest EPC and Land Registry data.

20 Allen Close outperforms the street on epc rating by a wide margin.

Price per m²

£3,545

Street avg £2,269

Strongly above

Floor Area

55 m²

Street avg 101 m²

Strongly below

Habitable Rooms

3 rooms

Street avg 6 rooms

Strongly below

CO₂ Emissions

1.5 t/year

Street avg 3.7 t/year

Strongly above

Before you decide

Everything you need to know about 20 Allen Close

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

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Comparables

Similar properties nearby

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

£265k

1 Axbridge Crescent, Llanrumney

CF3 5TJ

3 bed

£274k

1 Brendon Close, Llanrumney

CF3 5RJ

3 bed1 bath

£196k

1 Banwell Place, Llanrumney

CF3 5SH

3 bed

£195k

1 Bronte Close, Llanrumney

CF3 5PN

3 bed

£150k

1 Bluebell Drive

CF3 5RA

3 bed

£426k

1 Chapel Row Lane, Old St Mellons

CF3 5ST

3 bed

£251k

1 Captain S View, Braunton Crescent, Llanrumney

CF3 5AD

2 bed1 bath

£596k

1 Courtenay Close, Old St Mellons

CF3 5UL

4 bed2 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

Reported crime in the wider district is trending notably upward year-on-year.

Crime

3/mo

Rising year-on-year across the wider district.

Nearest stop

0.2 km

Llaneirwg Way — 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 20 Allen Close, Old St Mellons, Cardiff, CF3 5DH. Each answer is also embedded as structured data for search engines.