Feb 07, 2023 by HM
House prices in Thornhill (CF14 9)
This article reveals price per square metre data and various charts to help you understand current housing market in Thornhill (CF14 9).
Defining 'CF14 9'
This analysis is limited to properties whose postcode starts with "CF14 9", this is also called the postcode sector. It is shown in red on the map above. You can click on the map labels to change to a neighbouring sector.
Price per square metre
Knowing the average house price in Thornhill 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 areaE.g. 35, Guenever Close, Thornhill, Cardiff, sold for £292,000 on Feb2024. Given the internal area of 94 square metres, the price per sqm is £3,106.
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. £3,800£4,000, £4,000£4,200, £4,200£4,400 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 168 sales in Thornhill (CF14 9) that took place in the last two years.
Distribution of £ per sqm for Thornhill (CF14 9)
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.
The spread of prices will give you a feel of the typical range to expect in Thornhill (CF14 9). Of the 168 transactions, half were sold for between £3,590 and £4,350 per square metre. The median, or 'middle', price per square metre in 'CF14 9' is £4,010. Notably, only 25% of properties that sold recently were valued at more than £4,350m^{2}. For anything to be valued more than this means it has to be more desireable than the clear majority of homes.
Price map for Thornhill
Do have a look at the interactive price map I created. I find it useful and I am sure it will help you in exploring Thornhill. 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.
House price heatmap for Thornhill
Comparison with neighbouring postcode sectors
The table below shows how 'CF14 9' compares to neighbouring postcode sectors.
Postcode sector  Lower quartile  Middle quartile  Upper quartile 

CF14 5 Llanishen  £2,830m^{2}  £3,140m^{2}  £3,600m^{2} 
CF14 9 Thornhill  £3,590m^{2}  £4,010m^{2}  £4,350m^{2} 
CF14 0 Lisvane  £3,170m^{2}  £3,850m^{2}  £4,220m^{2} 
CF14 3 Gabalfa  £2,620m^{2}  £3,020m^{2}  £3,530m^{2} 
CF14 4 Heath  £2,940m^{2}  £3,450m^{2}  £3,980m^{2} 
CF14 2 Whitchurch  £2,610m^{2}  £3,240m^{2}  £3,760m^{2} 
CF14 7 Whitchurch  £2,960m^{2}  £3,540m^{2}  £4,130m^{2} 
CF14 1 Whitchurch  £3,190m^{2}  £3,710m^{2}  £4,300m^{2} 
CF14 6 Rhiwbina  £2,890m^{2}  £3,900m^{2}  £4,610m^{2} 
Will Thornhill 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 CF14 9 (Thornhill). 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 CF14 9 and the blue dots are the individual property sales that inform this trend.
Price per square metre in Thornhill (CF14 9) over time
Hover on any blue dot to see details of specific sales
Disclaimer: The data provided throughout this website about Thornhill 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 Thornhill data or any other data I am given.
Street level data
Street  Avg size  Avg £/m^{2}  Recent sales 

Oakridge, Thornhill, CF14 9B  57m^{2}  £3,765  26 
Pinecrest Drive, Thornhill, CF14 9D  65m^{2}  £3,983  17 
Heol Llinos, Thornhill, CF14 9J  64m^{2}  £2,418  16 
Woodruff Way, Thornhill, CF14 9F  100m^{2}  £3,181  15 
Guenever Close, Thornhill, CF14 9A  92m^{2}  £3,281  10 
Woodlawn Way, Thornhill, CF14 9E  57m^{2}  £3,981  10 
Cheriton Drive, Thornhill, CF14 9D  91m^{2}  £4,022  10 
Heol Y Cadno, Thornhill, CF14 9D  68m^{2}  £3,828  9 
Search for your street here.
Raw data
Our analysis of Thornhill 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  m^{2}  £/m^{2} 

35, Guenever Close, Thornhill, Cardiff  £292,000
Feb2024

94  3,106 
2, Guenever Close, Thornhill, Cardiff  £330,000
Feb2024

87  3,793 
94, Heol Llinos, Thornhill, Cardiff  £153,000
Jan2024

77  1,987 
See the entire list of all sales in Thornhill (CF14 9) here.
About
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.