Property profile

21 Clos AlynPontprennau

CF23 8LB

Pontprennau and Old St Mellons

Area profile →

Map showing 21 Clos Alyn, Pontprennau, Cardiff

Property Price
150k200k250k300k400k500k750k1.5M

Estimated sale price

£355,000

Terraced sold in Pontprennau and Old St Mellons

The box shows the middle 50% of terraced sale prices, the whiskers show the 5th to 95th percentile, and the marker shows this property's estimated price.

Half of similar homes sold within the box; most sold within the wider line.

An indicative model estimate, not a survey or formal valuation.

This property vs market

Last sold26 Sept 2025
£334,000Change since last sale: +£22,000 (+6.7%)
Annualised change
+6.8% per yearCardiff annualised change (terraced) since 2025: +3.7% per yearThis property's value grew faster than the market
Price per sq ftLocal median £342 per sq ft
£309 per sq ftEstimate vs local median: −£32 per sq ft (−9.5%)
Local sold pricesMedian for terraced in Pontprennau and Old St Mellons
£244,000Estimate vs local median: +£112,000 (+46%)
How this estimate is calculated

Area360's automated valuation uses available property details, recorded sales and local market data to estimate a sale price. This automated estimate is a guide, not a survey, mortgage valuation or formal valuation. See the valuation methodology and limitations.

Estimate calculated .

Property facts

Property typeHouse / End-Terrace
TenureFreehold
Construction period1991-1995
Floor area107 m² / 1,152 sq ft
Rooms6 habitable / 6 heated
EPC ratingC
EPC inspection06 Mar 2025

Sales history

DatePriceChange
26 Sept 2025£334,000+51%
31 Oct 2014£221,000-

Local market

Property prices in Pontprennau and Old St Mellons

Median price£290,000
Price per sq ft£342
Sales (last 12 months)190
Typical range (middle 50%)£241K – £355K

Based on 190 recent sales, the median property price is £290,000 (about £342 per square foot) in Pontprennau and Old St Mellons area, with individual transactions ranging from £30,000 up to £1,340,000.

Prices by property typelast 12 months

Median sale price, median price per square foot, sales count, and percentile information for each property type in Pontprennau and Old St Mellons over the last year.
TypeSalesMedian£/sq ft
Detached62£406,750£347
Semi-Detached63£283,500£372
Terraced48£244,000£342
Flats17£170,000£291

10-year price trendmedian sale price in Pontprennau and Old St Mellons

Sale price

Ten year median sale price trend for each property type in Pontprennau and Old St Mellons.
YearDetachedFlatsSemi-DetachedTerraced
2016£284,995£125,000£181,750£187,998
2017£305,000£130,000£224,995£182,750
2018£320,000£120,000£224,995£179,995
2019£309,498£127,498£219,995£184,995
2020£330,000£137,995£224,995£193,998
2021£336,000£137,000£239,995£220,000
2022£379,973£163,418£271,000£234,998
2023£363,000£165,000£280,000£244,995
2024£370,000£165,000£285,000£250,000
2025£415,000£175,000£285,500£248,498
2026£395,010£167,000£285,000£242,000
Ten year median sale price trend for each property type in Pontprennau and Old St Mellons.

Price per sq ft

Ten year median sale price per square foot trend for each property type in Pontprennau and Old St Mellons.
YearDetachedFlatsSemi-DetachedTerraced
2016£255£199£249£277
2017£271£198£238£283
2018£261£213£263£282
2019£272£223£281£280
2020£270£239£239£288
2021£292£236£299£302
2022£341£294£336£363
2023£344£283£350£353
2024£347£244£334£350
2025£347£287£357£342
2026£358£287£368£352
Ten year median sale price per square foot trend for each property type in Pontprennau and Old St Mellons.

Price distribution by property typelast 12 months

Price distribution by property type for Pontprennau and Old St Mellons in the last year.

Recent sales

There were 50+ recent sold properties in the last 18 months near CF23 8LB.

Recent sold properties in the last 18 months near CF23 8LB
DateAddressTypeTenurePriceMap
17 Feb 20264, Clos Alyn, Cardiff, CF23 8LBSemi-DetachedFreehold£300,000
26 Sept 202521, Clos Alyn, Cardiff, CF23 8LBTerracedFreehold£334,000
22 May 202644, Clos Cwm Creunant, Cardiff, CF23 8LADetachedFreehold£450,000
20 Mar 202640, Sindercombe Close, Cardiff, CF23 8LPSemi-DetachedFreehold£325,000
07 Jan 202623, Sindercombe Close, Cardiff, CF23 8LPTerracedFreehold£230,000

Other properties at this postcode

AddressTenureFloor areaLast sale
1, Clos Alyn, Pontprennau, CardiffFreehold91 m²£225,000 (2014)
3 Clos Alyn, Pontprennau, CardiffFreehold90 m²£270,000 (2023)
4 Clos Alyn, Pontprennau, CardiffFreehold80 m²£300,000 (2026)
5, Clos Alyn, Pontprennau, CardiffFreehold94 m²£220,000 (2019)
6, Clos Alyn, Pontprennau, CardiffFreehold107 m²£235,000 (2017)
7, Clos Alyn, Pontprennau, Cardiff-82 m²-
8, Clos Alyn, Pontprennau, CardiffFreehold90 m²£173,000 (2013)
9, Clos Alyn, Pontprennau, CardiffFreehold99 m²£77,000 (1998)
10 Clos Alyn, Pontprennau, CardiffFreehold53 m²£136,700 (2015)
11, Clos Alyn, Pontprennau, CardiffFreehold103 m²£281,000 (2019)

Area insights for CF23 8LB

Full area profile →

Overview

Postcode CF23 8LB is located in an urban city, within the Pontprennau and Old St Mellons ward of Cardiff in the Wales region, and forms part of the Pontprennau area. It has very low deprivation and low crime levels, with around 45.9 crimes per 1,000 residents per year, about 46% below the Wales average of 86 per 1,000. The average income per household in Pontprennau is £68,205 per year. The nearest station is Llanishen, about 1.7 miles away. There are no primary and no secondary schools in the area. There are 5 parks nearby, the closest large park is Pontprennau Park.

Crime rate
4/10
Crimes per 1k residents
46
Deprivation level
1/10
Income level
10/10
Social housing
0.7%
Connectivity
N/A
Flood Risk
N/A
Noise Level
No noise

Deprivation level

1/10

Pontprennau has a very low level of deprivation, ranked at position 1,758 out of 32,844 areas in England, placing it within the top 5% most deprived areas in Wales.

Crime level

4/10

Pontprennau has a low crime rate, with approximately 45.9 reported incidents per 1,000 population each year.

Social housing

0.7%

Approximately 0.7% of homes on this street are social housing provided by a local council or housing association. Across the surrounding area, around 7.2% of dwellings are socially rented.

Income level

10/10

The average income per household in Pontprennau is £68,205 per year.

Noise Level

No noise

No significant noise sources from railways or roads near CF23 8LB.

Transport

The nearest station is Llanishen located about 1.7 miles away. There are no other stations nearby.

Parks

Nearby parks and green spaces for CF23 8LB
DistanceNameSizeDirections
0.3 miPontprennau ParkLargeWalking directions to Pontprennau Park
0.3 miButterfield ParkMediumWalking directions to Butterfield Park
0.4 miGreen Acre ParkSmallWalking directions to Green Acre Park

Area Profile

Population
301
Population density
8,179.3 per km²

Crime

Crime per 1,000 population

Violence and sexual offences
19.03(-44%)
Shoplifting
17.35(+170%)
Anti-social behaviour
12.87(-1%)
Public order
9.51(+16%)
Criminal damage and arson
5.04(-31%)
Wales average

Demographics

Ethnic groups

British
225
74.75%
Other White
26
8.64%
Pakistani
9
2.99%
Chinese
8
2.66%
Bangladeshi
7
2.33%
Total population: 301

Economics

Education (age 16+)

Level 4+ (Degree)
115
47.72%
Level 3 (A level)
56
23.24%
No qualifications
28
11.62%
Level 2 (GCSEs 9-4)
23
9.54%
Level 1 (GCSEs 3-1)
10
4.15%
Total 16+ residents: 241

Housing

Housing tenure

Owns with a mortgage
48
35.82%
Private landlord or letting agency
46
34.33%
Owns outright
34
25.37%
Other forms of private rent
3
2.24%
Shared ownership
2
1.49%
Total households: 134

Schools

In the CF23 8LB postcode area, located within Pontprennau, there are 0 primary and 0 secondary schools in close proximity.

Nearby primary and secondary schools for CF23 8LB
DistancePhaseNameTypeRating
0.1 miNot applicablePontprennau Primary SchoolWelsh establishment

N/A

0.6 miNot applicableSt Bernadette's R.C. Primary SchoolWelsh establishment

N/A

0.6 miNot applicableThe Hollies Special SchoolWelsh establishment

N/A

Local amenities

3 nearby supermarkets & convenience stores within 0.5 mi of CF23 8LB

Nearby supermarkets & convenience stores for CF23 8LB
DistanceNameAddressDirections
0.3 miWaitroseCroescadarn Close, Cardiff, CF23 8ANWalking directions to Waitrose
0.4 miLidlCaxton Place, Cardiff, CF23 8HAWalking directions to Lidl
0.5 miAldiDartington Drive, Cardiff, CF23 8SQWalking directions to Aldi