House prices in CF64 5 (Sully)

This article reveals price per square metre data and various charts to help you understand current housing market in Sully, Penarth (CF64 5).

Defining 'CF64 5'

This analysis is limited to properties whose postcode starts with "CF64 5", 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 Sully.

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 Sully 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. 103, South Road, Sully, Penarth, sold for £360,000 on Mar-2024. Given the internal area of 81 square metres, the price per sqm is £4,444.

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. £4,250-£4,500, £4,500-£4,750, £4,750-£5,000 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 137 sales in Sully (CF64 5) that took place in the last two years.

Distribution of £ per sqm for Sully, Penarth
Distribution of £ per sqm house prices in Sully

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 Sully (CF64 5). Of the 137 transactions, half were sold for between £3,100 and £4,630 per square metre. The median, or 'middle', price per square metre in 'CF64 5' is £3,860. Notably, only 25% of properties that sold recently were valued at more than £4,630 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 Sully, Penarth

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 Penarth. 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 Sully
House price heatmap for Sully, Penarth

Comparison with neighbouring postcode sectors

The table below shows how 'CF64 5' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
CF64 1 Penarth £3,010 sqm £3,550 sqm £4,040 sqm
CF64 2 Penarth £2,900 sqm £3,450 sqm £4,030 sqm
CF64 3 Penarth £3,320 sqm £3,880 sqm £4,500 sqm
CF64 4 Dinas Powys £3,020 sqm £3,510 sqm £4,000 sqm
CF64 5 Sully £3,100 sqm £3,860 sqm £4,630 sqm

Will Penarth 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 CF64 5 (Sully) compared with both the wider area CF64 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 Sully,Penarth
House price trends for Sully

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 CF64 5 sales
Recent trends for Sully

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 Penarth 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 Penarth 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
Hayes Road, Sully, CF64 5Q 78 sqm £2,551 61
Arlington Road, Sully, CF64 5T 60 sqm £3,882 21
Althorp Drive, Sully, CF64 5F 74 sqm £3,927 14
Porlock Drive, Sully, CF64 5Q 77 sqm £4,080 13
Minehead Avenue, Sully, CF64 5T 101 sqm £3,029 13
Wimborne Crescent, Sully, CF64 5S 84 sqm £2,915 10
Bassett Road, Sully, CF64 5H 96 sqm £3,901 9
Cosmeston Drive, Sully, CF64 5F 107 sqm £3,924 9

Search for your street here.

Raw data

Our analysis of Sully 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
103, South Rd, Sully, Penarth £360,000
81 4,444
22, Conybeare Rd, Sully, Penarth £280,000
76 3,684
16, Whitcliffe Drive, Sully, Penarth £785,000
110 7,136

See the entire list of all sales in Sully (CF64 5) 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.