House prices in DA3 7 (Hartley)

This article reveals price per square metre data and various charts to help you understand current housing market in Hartley, New Ash Green (DA3 7).

Defining 'DA3 7'

This analysis is limited to properties whose postcode starts with "DA3 7", 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 Hartley.

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 Hartley 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. 48d, Main Road, Hartley, New Ash Green, sold for £360,000 on Mar-2024. Given the internal area of 70 square metres, the price per sqm is £5,142.

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. £5,250-£5,500, £5,500-£5,750, £5,750-£6,000 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 178 sales in Hartley (DA3 7) that took place in the last two years.

Distribution of £ per sqm for Hartley, New Ash Green
Distribution of £ per sqm house prices in Hartley

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 Hartley (DA3 7). Of the 178 transactions, half were sold for between £4,300 and £5,550 per square metre. The median, or 'middle', price per square metre in 'DA3 7' is £4,910. Notably, only 25% of properties that sold recently were valued at more than £5,550 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 Hartley, New Ash Green

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 New Ash Green. 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 Hartley
House price heatmap for Hartley, New Ash Green

Comparison with neighbouring postcode sectors

The table below shows how 'DA3 7' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
DA3 8 New Ash Green £3,780 sqm £4,340 sqm £5,040 sqm
DA3 7 Hartley £4,300 sqm £4,910 sqm £5,550 sqm

Will New Ash Green 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 DA3 7 (Hartley) compared with both the wider area DA3 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 Hartley,New Ash Green
House price trends for Hartley

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 DA3 7 sales
Recent trends for Hartley

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 New Ash Green 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 New Ash Green 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
Main Road, Hartley, DA3 7P 99 sqm £4,740 20
Woodland Avenue, Hartley, DA3 7B 113 sqm £5,641 16
Longfield Avenue, Hartley, DA3 7L 150 sqm £5,355 14
Main Road, Hartley, DA3 7Q 87 sqm £4,547 13
Essex Road, Hartley, DA3 7Q 84 sqm £4,514 13
Pincroft Wood, Hartley, DA3 7H 157 sqm £4,620 10
Brickfield Farm Close, Hartley, DA3 7A 62 sqm £3,776 10
Foxwood Way, Hartley, DA3 7L 82 sqm £5,757 9

Search for your street here.

Raw data

Our analysis of Hartley 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
48d, Main Rd, Hartley, New Ash Green £360,000
70 5,142
Inverurie, Woodland Avenue, Hartley, New Ash Green £567,500
132 4,299
8, Ridgewood, Hartley, New Ash Green £750,000
133 5,639

See the entire list of all sales in Hartley (DA3 7) 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.