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

Estimated value

£434,000

  • Since the 2003 sale (£199,995)+117%
  • Against CF3 5DH's recent median (£258,000)+68%

Newest record on this page: June 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Habitable rooms
7
From EPC
Floor area
117 m²
1259 sq ft
Energy rating
E
Score 52
Council tax
Band F
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

£434,000

  • Against its 2003 sale (£199,995)+117%
  • Against CF3 5DH's recent median (£258,000)+68%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 15 Allen Close is modelled from its 117 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF3 5DH. 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

    117 m² from the EPC lodged in July 2015

  • Sales of this home

    2 sales recorded, the latest in 2003

  • Recent sales in CF3 5DH

    5 sales, median £258,000 (2025–2020)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: June 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.

15 Allen Close's estimated value is more than triple its earliest registered sale price (1997).

Sales timeline

  1. 24 September 2003Most recent

    £199,995

    +61.3%over 5 years

  2. 25 September 1997

    £124,000

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

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

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Overview

About 15 Allen Close

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

15 Allen Close is a detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to 2003-2006 and council tax band F. The latest certificate (July 2015) shows an E (score 52), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 85), a 3-band jump. The latest certificate is from July 2015, so improvements made since then won't be reflected.

It hasn't traded since September 2003, a hold of 23 years that's notably long for the area. At 117 m² the property is well over the postcode median (90 m² across 24 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1997–2003, sale prices on this property compounded at 8.3% per year. Today's modelled estimate of £434,000 sits 117% above the 2003 sale of £199,995.

Before you decide

Everything you need to know about 15 Allen Close

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.

15 Allen Close sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.

EPC Expired

This certificate is over 10 years old and is no longer valid.Expired 28 Jul 2025

Current Certificate
Jul 2015

EPC Rating

A
B
C
D
E
E52
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Average
CO2 Emissions
6.5 t/year
Occupancy
Owner Occupied

Certificate validity

Expired on 28 July 2025

New assessment needed to sell or let
Planning

Planning history

Applications and permits filed against 15 Allen Close, Old St Mellons, Cardiff, CF3 5DH, sourced from the PlanIt planning register.

15 Allen Close 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 Allen Close homes

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

On co₂ emissions, 15 Allen Close runs well behind the street norm.

Price per m²

£1,709

Street avg £2,345

Below

Floor Area

117 m²

Street avg 99 m²

Above

Habitable Rooms

7 rooms

Street avg 6 rooms

Above

CO₂ Emissions

6.5 t/year

Street avg 3.5 t/year

Strongly below
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

Llaneirwg Way — bus stop.

Nearest stops

  • Llaneirwg WayBus stop176m
  • Vaindre LaneBus stop360m
  • Wern Fawr LaneBus stop377m
  • Tyrwinch RoadBus stop407m

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

21st centuryDetached HouseEPC E

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.

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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.
£443k

1 Chapel Row Lane, Old St Mellons

CF3 5ST

3 bed
£472k

1 Clos Hendre Gadno, Old St Mellons

CF3 5UJ

5 bed3 bath
£538k

1 Courtenay Close, Old St Mellons

CF3 5UL

4 bed2 bath
£315k

1 Chapel Row, Old St Mellons

CF3 5UB

£269k

1 Axbridge Crescent, Llanrumney

CF3 5TJ

3 bed
£264k

1 Brendon Close, Llanrumney

CF3 5RJ

3 bed1 bath
£263k

1 Captain S View, Braunton Crescent, Llanrumney

CF3 5AD

2 bed1 bath
£224k

1 Dickens Avenue, Llanrumney

CF3 5LX

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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 15 Allen Close is modelled from its 117 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF3 5DH. 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. 2 sales are recorded for 15 Allen Close. 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 15 Allen Close was lodged in July 2015 at band E and expired in July 2025, so a new one is needed to sell or let. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 15 Allen Close. 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 5DH.
Council tax band
15 Allen Close is in council tax band F. 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 15 Allen Close, Old St Mellons, Cardiff, CF3 5DH. Each answer is also embedded as structured data for search engines.

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