Skip to content
UK Property Looker

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

2 planning records

Estimated value

£482,000

  • Since the 2012 sale (£310,000)+55%
  • Against CF3 5DH's recent median (£258,000)+87%

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
Bedrooms
4
Floor area
141 m²
1518 sq ft
Energy rating
D
Score 67
Council tax
Band F
Tenure
Owner Occupied
Get directions (opens in a new tab)
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

£482,000

  • Against its 2012 sale (£310,000)+55%
  • Against CF3 5DH's recent median (£258,000)+87%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 17 Allen Close is modelled from its 141 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

    141 m² from the EPC lodged in April 2012

  • Sales of this home

    2 sales recorded, the latest in 2012

  • 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
Planning1 of 2 applicationsFull 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.

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

Sales timeline

  1. 5 August 2012Most recent

    £310,000

    +150.0%over 14 years

  2. 10 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

One time fee only - money back guarantee

Overview

About 17 Allen Close

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

17 Allen Close is a four-bedroom detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 141 m² (around 1518 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (April 2012) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 81), a 2-band jump. The latest certificate is from April 2012, so improvements made since then won't be reflected.

At 141 m² the property is well over the postcode median (90 m² across 24 EPCs), placing it in the larger end of the local stock. Across 1997–2012, sale prices on this property compounded at 6.3% per year. Today's modelled estimate of £482,000 sits 55.5% above the 2012 sale of £310,000. On a £-per-square-foot basis, the last sale (£204/sq ft) was about 45.7% above the typical sold price in the postcode. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include tree works, meaningful when judging how the property has evolved. On the market in August 2012 and unlisted since — roughly 14 years.

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

  • Bedrooms4
Before you decide

Everything you need to know about 17 Allen Close

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
Energy

Energy performance

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

Recommended upgrades on file would lift this property by multiple EPC bands.

EPC Expired

This certificate is over 10 years old and is no longer valid.Expired 02 Apr 2022

Current Certificate
Apr 2012

EPC Rating

A
B
C
D
D67
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
4.8 t/year
Occupancy
Owner Occupied

Certificate validity

Expired on 2 April 2022

New assessment needed to sell or let
Planning

Planning history

Applications and permits filed against 17 Allen Close, Old St Mellons, Cardiff, CF3 5DH, sourced from the PlanIt planning register.

Planning history at 17 Allen Close is exclusively tree-management applications — typical for a property with mature trees on or near the plot.

2 applications on record at 17 Allen Close, Old St Mellons, Cardiff, CF3 5DH

2decisions
  1. Jun 2013
    Tree WorksTrees
    Outcome in report

    CUT DOWN A NUMBER OF TREES AT REAR OF 17 ALLEN CLOSE ADJACENT TO BOUNDARY WITH 15 ALLEN CLOSE : TWO SYCAMORE TREES (FOUR STEMS), CENTRE OF GARDEN TWO ASH TREES (FOUR STEMS)

    Reference
    OSTM/TP/13/00096
    Full record in report
  2. More recent applications — locked
  3. Tree WorksDecision

Unlock 17 Allen Close, Old St Mellons, Cardiff, CF3 5DH's full planning history

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

  • Every decision — granted, refused or withdrawn (2 on record)
  • All 2 applications on this property in full
  • What the pattern means for extending or converting here
£14.99one-off · instant

One time fee only - money back guarantee

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.

17 Allen Close outperforms the street on floor area by a wide margin.

Price per m²

£2,199

Street avg £2,325

Below

Floor Area

141 m²

Street avg 98 m²

Strongly above

Habitable Rooms

8 rooms

Street avg 6 rooms

Strongly above

CO₂ Emissions

4.8 t/year

Street avg 3.6 t/year

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

Late 20th centuryDetached HouseEPC D

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 £695 · 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.
£538k

1 Courtenay Close, Old St Mellons

CF3 5UL

4 bed2 bath
£472k

1 Clos Hendre Gadno, Old St Mellons

CF3 5UJ

5 bed3 bath
£443k

1 Chapel Row Lane, Old St Mellons

CF3 5ST

3 bed
£269k

1 Axbridge Crescent, Llanrumney

CF3 5TJ

3 bed
£264k

1 Brendon Close, Llanrumney

CF3 5RJ

3 bed1 bath
£200k

1 Bronte Close, Llanrumney

CF3 5PN

3 bed
£197k

1 Banwell Place, Llanrumney

CF3 5SH

3 bed
£150k

1 Bluebell Drive

CF3 5RA

3 bed

Property research, connected

Get up to date data on unlimited properties per month

Explore sale histories, valuations, energy ratings and local areas. Ask the assistant to connect the details and take your research further.

Start your research
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 17 Allen Close is modelled from its 141 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 17 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 17 Allen Close was lodged in April 2012 at band D and expired in April 2022, 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. 2 applications are matched to 17 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
17 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 17 Allen Close, Old St Mellons, Cardiff, CF3 5DH. Each answer is also embedded as structured data for search engines.

Know this home? Think our valuation is wrong?

Leave a note for other visitors about work done or anything the records miss, and say what you think it's worth. It takes about two minutes.

Keep exploring