House prices in CF39 9 (Porth)

This article reveals price per square metre data and various charts to help you understand current housing market in Porth, Tonyrefail (CF39 9).

Defining 'CF39 9'

This analysis is limited to properties whose postcode starts with "CF39 9", this is also called the postcode sector. It is shown in red on the map above. There are no official names for postcode sectors so I've just labelled it Porth.

You can click on the map labels to change to a neighbouring sector, or you can enter a different postcode sector (e.g. CM23 4) below.

FYI, a postcode sector is the full postcode without the last two letters.

Price per square metre

Knowing the average house price in Porth 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. 3, Leyshon Terrace, Porth, Tonyrefail, sold for £66,500 on Apr-2024. Given the internal area of 75 square metres, the price per sqm is £886.

England & Wales have been officially metric since 1965. However house price per square foot is prefered by some estate agents and those of sufficiently advanced age ;-) They may want to convert square meters 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. etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 198 sales in Porth (CF39 9) that took place in the last two years.

Distribution of £ per sqm for Porth, Tonyrefail
Distribution of £ per sqm house prices in Porth

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 Porth (CF39 9). Of the 198 transactions, half were sold for between £1,080 and £1,690 per square metre. The median, or 'middle', price per square metre in 'CF39 9' is £1,340. Notably, only 25% of properties that sold recently were valued at more than £1,690 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of homes.

Price map for Porth, Tonyrefail

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 Tonyrefail. 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.

Property price heatmap for Porth
House price heatmap for Porth, Tonyrefail

Comparison with neighbouring postcode sectors

The table below shows how 'CF39 9' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
CF39 8 Tonyrefail £1,450 sqm £1,780 sqm £2,550 sqm
CF39 0 Porth £1,020 sqm £1,320 sqm £1,600 sqm
CF39 9 Porth £1,080 sqm £1,340 sqm £1,690 sqm

Will Tonyrefail 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 chart below for CF39 9 (Porth) compared with both the wider area CF39 and inflation (CPIH from the Office of National Statistics). The dashed trend lines in the chart show the average over time.

Historic price per square metre in Porth,Tonyrefail
House price trends for Porth

For the most recent sales activity, rather than a summarized average, it is better to see the underlying data. This is shown in the chart below, where blue dots represent individual sales, click on them to see details. If there is an obvious trend you should be able to spot it here amid the noise from outliers.

Most recent CF39 9 sales
Recent trends for Porth

Data from Land Registry comes in gradually over time. I update it every month but it takes about 5 months for the majority of sales for Tonyrefail to be recorded. Disclaimer: I do not verify and cannot guarantee the accuracy of any data shown. Outliers exist in the data, typically these are where the EPC registry records the internal area incorrectly, sometimes although very rarely the Land Registry price paid data can be wrong. The data provided throughout this website about Tonyrefail 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.

Street level data

Street Avg size Avg £sqm Recent sales
High Street, Porth, CF39 9A 79 sqm £1,177 26
North Road, Porth, CF39 9S 77 sqm £978 25
Charles Street, Porth, CF39 9Y 92 sqm £1,306 23
High Street, Porth, CF39 9E 83 sqm £1,047 20
Birchgrove Street, Porth, CF39 9U 91 sqm £1,336 17
Trebanog Road, Porth, CF39 9E 81 sqm £1,293 14
Trebanog Road, Porth, CF39 9D 85 sqm £1,115 13
Eirw Road, Porth, CF39 9L 82 sqm £1,222 12

Search for your street here.

Raw data

Our analysis of Porth 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 sqm £/sqm
3, Leyshon Terrace, Porth, Tonyrefail £66,500
75 886
78, Birchgrove St, Porth, Tonyrefail £169,995
88 1,931
215, High St, Porth, Tonyrefail £120,000
52 2,307

See the entire list of all sales in Porth (CF39 9) here.


I created HouseMetric because I wanted to see this data and analysis myself, I also wanted to teach myself to build a website. Please give me feedback or spread the word about it. I'm constantly tinkering and adding more stuff to it.