House prices in AL5 3 (Harpenden)

This article reveals price per square metre data and various charts to help you understand current housing market in Harpenden (AL5 3).

Defining 'AL5 3'

This analysis is limited to properties whose postcode starts with "AL5 3", 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 Harpenden.

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 Harpenden 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. 18, Tintern Close, Harpenden, sold for £690,000 on Jan-2024. Given the internal area of 132 square metres, the price per sqm is £5,227.

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. £6,150-£6,500, £6,500-£6,850, £6,850-£7,200 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 99 sales in Harpenden (AL5 3) that took place in the last two years.

Distribution of £ per sqm for Harpenden
Distribution of £ per sqm house prices in Harpenden

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 Harpenden (AL5 3). Of the 99 transactions, half were sold for between £5,630 and £8,020 per square metre. The median, or 'middle', price per square metre in 'AL5 3' is £6,680. Notably, only 25% of properties that sold recently were valued at more than £8,020 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 Harpenden

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 Harpenden. 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 Harpenden
House price heatmap for Harpenden

Comparison with neighbouring postcode sectors

The table below shows how 'AL5 3' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
AL5 2 Harpenden £7,090 sqm £8,240 sqm £9,290 sqm
AL5 5 Harpenden £5,820 sqm £6,740 sqm £7,750 sqm
AL5 1 Harpenden £6,020 sqm £6,880 sqm £7,720 sqm
AL5 3 Harpenden £5,630 sqm £6,680 sqm £8,020 sqm
AL5 4 Harpenden £5,650 sqm £6,730 sqm £8,050 sqm

Will Harpenden 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 AL5 3 (Harpenden) compared with both the wider area AL5 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 Harpenden,Harpenden
House price trends for Harpenden

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 AL5 3 sales
Recent trends for Harpenden

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 Harpenden 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 Harpenden 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
Park Rise, Harpenden, AL5 3A 128 sqm £7,736 16
Harpenden Rise, Harpenden, AL5 3B 89 sqm £7,681 16
Roundwood Lane, Harpenden, AL5 3R 42 sqm £3,515 15
Park Mount, Harpenden, AL5 3A 112 sqm £7,249 14
Tuffnells Way, Harpenden, AL5 3H 131 sqm £6,432 14
Luton Road, Harpenden, AL5 3B 80 sqm £7,097 11
Vale Close, Harpenden, AL5 3L 102 sqm £6,000 9
Roundwood Lane, Harpenden, AL5 3B 109 sqm £6,808 8

Search for your street here.

Raw data

Our analysis of Harpenden 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
18, Tintern Close, Harpenden £690,000
132 5,227
Birch House, 34, Roundwood Park, Harpenden £1,910,000
239 7,991
8, Ridge Avenue, Harpenden £675,000
128 5,273

See the entire list of all sales in Harpenden (AL5 3) 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.