Feb 07, 2023 by HM

House prices in Pentwyn (CF23 7)

This article reveals price per square metre data and various charts to help you understand current housing market in Pentwyn (CF23 7).

Price per square metre

Knowing the average house price in Pentwyn is not much use. However, knowing average price per square metre can be quite useful. Price per sqm allows some comparison between properties of different size. We define price per square metre as the sold price divided by the internal area of a property:

£ per sqm = price ÷ internal area
E.g. 166, The Hawthorns, Pentwyn, Cardiff, sold for £255,000 on Oct-2023. Given the internal area of 108 square metres, the price per sqm is £2,361.

England & Wales have been officially metric for many decades. However house price per square foot is sometimes prefered by those of sufficiently advanced age. They may want to convert metres on this page to square feet.

The chart below is called a histogram, it helps you see the distribution of this house price per sqm data. To make this chart we put the sales data into a series of £ per sqm 'buckets' (e.g. £2,900-£3,000, £3,000-£3,100, £3,100-£3,200 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 171 sales in Pentwyn (CF23 7) that took place in the last two years.

Distribution of £ per sqm for Pentwyn (CF23 7)
Distribution of £ per sqm house prices in Pentwyn

You can see the spread of prices above. This is because although internal area is a key factor in determining valuation, it is not the only factor. Many factors other than size affect desirability; these factors could be condition, aspect, garden size, negotiating power of the vendor etc.

That said, the spread of prices will give you a feel of the typical range to expect in Pentwyn (CF23 7). Of the 171 transactions, half were sold for between £2,230 and £2,900 per square metre. Notably, only 25% of properties that sold recently were valued at more than £2,900m2. For anything to be valued more than this means it has to be more desireable than the clear majority of homes.

For the average, we calculate the 'median' or middle price. The median price per square metre in 'CF23 7' is £2,500. The table below shows how 'CF23 7' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
CF23 5 Penylan £3,190m2 £3,700m2 £4,290m2
CF23 6 Cyncoed £3,100m2 £3,800m2 £4,560m2
CF23 8 Pontprennau £3,180m2 £3,620m2 £4,030m2
CF23 7 Pentwyn £2,230m2 £2,500m2 £2,900m2
CF23 9 Llanedeyrn £1,980m2 £2,550m2 £3,530m2

Will Pentwyn house prices drop in 2024?

I cannot tell the future and don't believe anyone who says they can. I can however plot price trends - I have done this in the scatter plot below for CF23 7 (Pentwyn). From this one could infer a range of reasonable possible future price falls or rises. In the chart below, the red dashed line is the house price trend for CF23 7 and the blue dots are the individual property sales that inform this trend.

Price per square metre in Pentwyn (CF23 7) over time
House price trends for Pentwyn

Hover on any blue dot to see details of specific sales

Disclaimer: The data provided throughout this website about Pentwyn and any other area, is not financial advice. Any information provided does not and cannot ever take in to account the particular financial situation, objectives or property needs of either you or anyone reading this information. Furthermore, I cannot guarantee the accuracy of any data shown. This information is based on sold prices and internal area data provided by Land Registry and other third parties - I do not verify the accuracy of the Pentwyn data or any other data I am given.

Price map for Pentwyn

I've just finished coding the map I link to below. I find it useful and I am sure it will help you in exploring Pentwyn. You can zoom in all the way to individual properties and then all the way back out to see the whole country. The colours show the current estimated property values. I will explain more about the methodology and create a key next week.

Property price heatmap for Pentwyn
House price heatmap for Pentwyn

Street level data

Street Avg size Avg £/m2 Recent sales
Wyncliffe Gardens, Pentwyn, CF23 7F 77m2 £2,529 51
The Hawthorns, Pentwyn, CF23 7A 78m2 £2,330 37
Glyn Eiddew, Pentwyn, CF23 7B 92m2 £2,513 26
Brynheulog, Pentwyn, CF23 7J 76m2 £2,300 20
Waun Fach, Pentwyn, CF23 7B 94m2 £2,295 16
Bryncyn, Pentwyn, CF23 7B 91m2 £2,393 16
Glyn Rhosyn, Pentwyn, CF23 7D 93m2 £2,524 15
Coeden Dal, Pentwyn, CF23 7D 93m2 £2,241 15

Search for your street here.

Raw data

Our analysis of Pentwyn is derived from what is essentially a big table of sold prices from Land Registry with added property size information. Below are three rows from this table to give you an idea.

Address Paid m2 £/m2
166, The Hawthorns, Pentwyn, Cardiff £255,000
108 2,361
54, Waun Fach, Pentwyn, Cardiff £215,000
90 2,388
9, Rhododendron Close, Pentwyn, Cardiff £335,000
90 3,722

See the entire list of all sales in Pentwyn (CF23 7) here.


HouseMetric is a hobby, created out of a desire to see data and analysis not present on any free to use website. It is still a work in progress and I'll add more stuff in the near future.