Skip to content
UK Property Looker

21 Clos Alyn, Pontprennau, Cardiff, CF23 8LB

Estimated value

£332,000

  • Since the 2025 sale (£334,000)-1%
  • Against CF23 8LB's recent median (£220,000)+51%

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
Bedrooms
4
Bathrooms
2
Floor area
107 m²
1152 sq ft
Energy rating
C
Score 74
Council tax
Band E
Tenure
Freehold
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

£332,000

  • Against its 2025 sale (£334,000)-1%
  • Against CF23 8LB's recent median (£220,000)+51%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Clos Alyn is modelled from its 107 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF23 8LB. 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

    107 m² from the EPC lodged in March 2025

  • Sales of this home

    2 sales recorded, the latest in 2025

  • Recent sales in CF23 8LB

    5 sales, median £220,000 (2026–2019)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: February 2026Latest 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.

Latest sale on 21 Clos Alyn was the highest on Land Registry record across the postcode.

Sales timeline

  1. 25 September 2025Most recent

    £334,000

    +51.1%over 10 years

  2. 31 October 2014

    £221,000

Median price across the last 5 sales in CF23 8LB: £220,000 (2026–2019).

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 Clos Alyn

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

21 Clos Alyn is a four-bedroom end-of-terrace house in Pontprennau, Cardiff, Cardiff (CF23 8LB). It has a recorded floor area of 107 m² (around 1152 sq ft), construction records dating it to 1991-1995 and council tax band E. Tenure is freehold. The latest certificate (March 2025) shows a C (score 74). When first surveyed in June 2014 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good. The recommended improvements would push it to B (score 85). Records show the property has been extended at some point in its history. The home occupies a cul-de-sac position.

A recent sale: £334,000 in September 2025. At 107 m² it's 24.4% larger than the typical home in the postcode (86 m² median across 20 EPCs). Across 2014–2025, sale prices on this property compounded at 3.9% per year. On a £-per-square-foot basis, the last sale (£290/sq ft) was about 45.3% above the typical sold price in the postcode.

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
  • Bathrooms2
  • CloakroomYes
  • EnsuiteYes

Outside

  • DrivewayYes
  • Cul-de-sacYes

Building

  • TenureFreehold
  • Previously extendedYes
Before you decide

Everything you need to know about 21 Clos Alyn

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.
Current Certificate(1 of 2)
Mar 2025

EPC Rating

A
B
C
C74
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
3.0 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 17 March 2035

8 years remaining

Property Improvements

Changes detected from historical EPC data

Mar 2025from Jun 2014
EPC improved fromD66toC74
Hot Water
AverageGood

Hot water efficiency improved

Planning

Planning history

Applications and permits filed against 21 Clos Alyn, Pontprennau, Cardiff, CF23 8LB, sourced from the PlanIt planning register.

21 Clos Alyn has no planning applications on record.

1

But the area is active

1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.

On the street

Versus other Clos Alyn homes

Four headline reads against 20 similar houses on this street, drawn from the latest EPC and Land Registry data.

21 Clos Alyn outperforms the street on floor area by a wide margin.

Price per m²

£3,121

Street avg £2,685

Strongly above

Floor Area

107 m²

Street avg 79 m²

Strongly above

Habitable Rooms

6 rooms

Street avg 5 rooms

Strongly above

CO₂ Emissions

3.0 t/year

Street avg 3.0 t/year

On par
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

169/mo

Falling year-on-year across the wider district.

Nearest stop

0.1 km

Sindercombe Cl — bus stop.

Nearest stops

  • Sindercombe ClBus stop77m
  • Pontprennau Community CentreBus stop171m
  • Clos Cwm DuBus stop173m
  • The FarthingsBus stop260m

Most reported crime locally

  • Violence & Sexual Offences995 reports33%
  • Anti-social Behaviour345 reports11%
  • Public Order344 reports11%
  • Shoplifting340 reports11%

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 3 Building Survey

Late 20th centuryEnd-Terrace HouseFreeholdEPC CExtended multiple times (2+ extensions)

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

From £955 · 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.
£381k

1 Blackberry Way, Pontprennau

CF23 8FE

4 bed2 bath
£401k

1 Clos Nant Mwlan, Pontprennau

CF23 8NA

4 bed2 bath
£417k

1 Clos Nant Y Cwm, Pontprennau

CF23 8LG

4 bed2 bath
£488k

1 Allt Y Wennol, Pontprennau

CF23 8AS

4 bed2 bath
£503k

1 Acorn Grove, Pontprennau

CF23 8NG

4 bed2 bath
£327k

1 Amberwood Close, Pontprennau

CF23 8BZ

3 bed
£321k

1 Clos Alyn, Pontprennau

CF23 8LB

3 bed
£306k

1 Amblecote Close, Pontprennau

CF23 8BY

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 21 Clos Alyn is modelled from its 107 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF23 8LB. 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 21 Clos Alyn. 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 Clos Alyn was lodged in March 2025 at band C and is valid until March 2035. 2 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 Clos Alyn. 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 CF23 8LB.
Council tax band
21 Clos Alyn is in council tax band E. 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 Clos Alyn, Pontprennau, Cardiff, CF23 8LB. 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