Feb 07, 2023 by HM

House prices in Mountain Ash (CF45 3)

This article reveals price per square metre data and various charts to help you understand current housing market in Mountain Ash (CF45 3).

Price per square metre

Knowing the average house price in Mountain Ash 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. 58, Victoria Street, Mountain Ash, sold for £85,000 on Sep-2023. Given the internal area of 68 square metres, the price per sqm is £1,250.

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. £1,350-£1,500, £1,500-£1,650, £1,650-£1,800 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 257 sales in Mountain Ash (CF45 3) that took place in the last two years.

Distribution of £ per sqm for Mountain Ash (CF45 3)
Distribution of £ per sqm house prices in Mountain Ash

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 Mountain Ash (CF45 3). Of the 257 transactions, half were sold for between £900 and £1,460 per square metre. Notably, only 25% of properties that sold recently were valued at more than £1,460m2. 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 'CF45 3' is £1,170. The table below shows how 'CF45 3' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
CF45 3 Mountain Ash £900m2 £1,170m2 £1,460m2
CF45 4 Abercynon £1,200m2 £1,500m2 £1,830m2

Will Mountain Ash 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 CF45 3 (Mountain Ash). 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 CF45 3 and the blue dots are the individual property sales that inform this trend.

Price per square metre in Mountain Ash (CF45 3) over time
House price trends for Mountain Ash

Hover on any blue dot to see details of specific sales

Disclaimer: The data provided throughout this website about Mountain Ash 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 Mountain Ash data or any other data I am given.

Price map for Mountain Ash

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 Mountain Ash. 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 Mountain Ash
House price heatmap for Mountain Ash

Street level data

Street Avg size Avg £/m2 Recent sales
Woodland Street, Mountain Ash, CF45 3R 82m2 £1,064 23
Penrhiwceiber Road, Mountain Ash, CF45 3S 85m2 £991 22
Tyr Felin Street, Mountain Ash, CF45 3Y 80m2 £545 20
Woodfield Terrace, Mountain Ash, CF45 3U 102m2 £730 19
High Street, Mountain Ash, CF45 3P 72m2 £906 17
Victoria Street, Mountain Ash, CF45 3A 63m2 £1,046 15
Harcourt Terrace, Mountain Ash, CF45 3S 76m2 £1,045 15
Hamilton Street, Mountain Ash, CF45 3R 102m2 £1,107 13

Search for your street here.

Raw data

Our analysis of Mountain Ash 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
58, Victoria St, Mountain Ash £85,000
68 1,250
9, Albert St, Mountain Ash £120,000
70 1,714
5, Duffryn St, Mountain Ash £75,000
68 1,102

See the entire list of all sales in Mountain Ash (CF45 3) 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.