House prices in 'CF5 6', St Fagans
This article reveals price per square metre data and various charts to help you understand current housing market in 'CF5 6' (St Fagans, Cardiff)  statistics were last calculated on 01 November 2024.
Defining 'CF5 6'
This analysis is limited to properties whose postcode starts with "CF5 6", this is also called the postcode sector. There are no official postcode sector names so I've just labelled it CF5 6, St Fagans. It is shown in red on the map below.
Want to change geography?
You can click on the map above to change to a neighbouring sector, or you can use the search form below.
Price per square metre
Knowing the average house price in CF5 6 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
For example in September 2024, 17, Le Sor Hill, St Fagans, CF5 6LW sold for £292,000. Given the internal area of 127 square metres recorded on the EPC, the price per sqm is £292,000 ÷ 127 sqm = £2,299.
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 ;). It is a huge pain to code the automatic conversion for square meters to square feet for all the graphs and charts on CF5 6 and elsewhere. All the conditionals turn my tidy code for into spaghetti. I will get around to it at some point, but for now you can just divide everything by 10 in your head, move a decimal place and you'll be close enough. If you want to be more precise 1 sqm = 10.76391 sqft.
Distribution of £ per sqm for 'CF5 6' vs 'CF5'
The chart above is called a histogram, it helps you see the distribution of house price per sqm in CF5 6 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £4,250 to £4,500, £4,500 to £4,750, £4,750 to £5,000 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 237 sales that took place in CF5 6, St Fagans, Cardiff in the last 24 months.
Generate a custom histogram like the one above but based on your own criteria.
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 CF5 6, St Fagans. Notably, only 25% of properties that sold recently were valued at more than £4,000 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of CF5 6 homes.
Box plot of £ per sqm for CF5 6
Tip: click on the chart to see the values.
The chart above is called a boxplot (or a boxandwhisker plot). Box plots, like histograms, are used to graphically represent the distribution of data, showing the central tendency, spread of the distribution. In the context of £ per square metre property price distributions, box plots represent the variation in property prices within a geographic area e.g. St Fagans. The chart above shows a boxplot for 'CF5 6' as well as the 'CF5' postcode district.
Property price map for St Fagans
Have a look at the interactive price map I created for myself. Use it to explore 'CF5 6' house prices all the way down to individual property plots.
St Fagans house price forecasting
I cannot tell what house prices will do in the future and don't believe anyone who says they can. However we can plot price trends, I have done this in the chart below for CF5 6 (St Fagans) compared with the wider postcode district of CF5. You can extrapolate from this based on your own views on future interest rates, inflation and other factors.
House price index for CF5 6
Tip: click on the legend items to show/hide different lines
Download house price index as CSV (premium users only).
The chart above shows changes in 'CF5 6' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in CF5 6 and is set to 100 in 2004. I'm comparing the trends for CF5 6,St Fagans with the wider postcode district of CF5 What is more interesting is to look at the difference between flats and houses, even those in the same area follow a very different trend, to get a robust enough sample size to see this we need to zoom out and look at house price trends for the entire Vale of Glamorgan local authority.
The dashed lines show nominal house price changes, the solid lines show the same data adjusted for inflation. Economists call this the 'real' price change. You have to take inflation into account when comparing prices over time. It's calculated using the formula:
Real Rate of Return = (1 + Nominal Rate) ÷ (1 + Inflation Rate) – 1In this formula, the nominal rate is the rate of change before any adjustments, and the inflation rate is taken from the Consumer Price Index. The real rate of return is a more accurate measure of change in value, because £1 today does not have the same buying power as £1 in the past. For example, if a savings account pays an interest rate of 3% per year and the inflation rate is 5% per year, the real rate of return is 2%. This means that the investment's value is shrinking by 2% each year.
Historic returns for CF5 6
CF5 6 sector  CF5 district  

Nominal  Real  Nominal  Real  
20 yr per annum  3.2%  0.6%  3.5%  0.8% 
20 yr total  89.0%  11.9%  98.0%  17.3% 
10 yr per annum  4.1%  1.3%  4.7%  1.8% 
10 yr total  49.4%  13.4%  58.1%  20.0% 
5 yr per annum  3.7%  0.4%  5.3%  1.2% 
5 yr total  20.0%  1.8%  29.6%  6.1% 
1 yr per annum  9.0%  12.6%  0.8%  4.7% 
1 yr total  9.0%  12.6%  0.8%  4.7% 
This table complements the house price index chart above, presenting the data in a more detailed format. It breaks down the information into 20year, 10year, 5year, and 1year periods, further categorized by property type. For each period, we display both a per annum rate of change and a total rate of change.
The total rate of change represents the overall change over the entire period. The formula for total return is:
Total return = (Index at end of period ÷ Index at start of period)  1
The per annum rate of change is the annualized rate of change over the period. This is equivalent to the annual bank savings rate you would need to achieve the same total return over the given period. This annualized return is also known as the Compound Annual Growth Rate (CAGR). The formula for CAGR is:
CAGR = (1 + Total return) ^ (1 ÷ Number of years)  1
Some specific examples:
 Over the past 20 years, CF5 district have seen a 0.8% annual change when adjusted for inflation. This translates to a total change of 17.3% in real terms.
 Over the past 5 years, CF5 district have seen a 1.2% annual change when adjusted for inflation. This translates to a total change of 6.1% in real terms.
Most recent CF5 6 sales
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.
Tip: hover over dots to see details
Street level data
Street  Avg size  Avg £sqm  Recent sales 

Picca Close, St Fagans, CF5 6X  108 sqm  £3,276  19 
Trem Y Coed, St Fagans, CF5 6F  109 sqm  £3,111  19 
Harlech Road, St Fagans, CF5 6X  114 sqm  £3,139  14 
Cae Newydd, St Fagans, CF5 6F  115 sqm  £4,289  12 
Michaelston Road, St Fagans, CF5 6F  85 sqm  £4,092  12 
Goldsland Walk, St Fagans, CF5 6F  123 sqm  £3,875  9 
Old Port Road, St Fagans, CF5 6A  159 sqm  £3,593  9 
Gwern Close, St Fagans, CF5 6X  93 sqm  £3,178  8 
Search for your street here.
Nearby geographies
The table below shows how 'CF5 6' compares to the other postcode sectors in CF5.
Sector  Lower quartile  Median  Upper quartile  Sales in last 2yr 

CF72 8 Miskin  £2,530 sqm  £3,040 sqm  £3,530 sqm  191 
CF71 7 Cowbridge  £3,390 sqm  £3,840 sqm  £4,250 sqm  226 
CF64 4 Dinas Powys  £3,010 sqm  £3,570 sqm  £4,060 sqm  143 
CF63 1 Barry  £1,810 sqm  £2,230 sqm  £2,970 sqm  161 
CF62 9 Barry  £2,300 sqm  £2,670 sqm  £3,130 sqm  98 
CF62 8 Barry  £2,070 sqm  £2,720 sqm  £3,120 sqm  131 
CF62 3 Rhoose  £2,700 sqm  £3,130 sqm  £3,520 sqm  139 
CF5 6 St Fagans  £3,300 sqm  £3,580 sqm  £4,000 sqm  237 
CF5 5 Cardiff  £1,990 sqm  £2,420 sqm  £2,810 sqm  189 
CF5 4 Cardiff  £2,100 sqm  £2,540 sqm  £3,110 sqm  227 
Raw data
Our analysis of CF5 6 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 

17, Le Sor Hill, St Fagans, Cardiff  £292,000
Sep2024

127  2,299 
13, Trem Y Rhyd, St Fagans, Cardiff  £390,000
Sep2024

81  4,814 
4, Campbell Court, St Fagans, Cardiff  £800,000
Aug2024

217  3,686 
About
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.