House prices in TN7 (Upper Hartfield)
This article shows price per square metre data and various charts to help you understand the housing market in TN7 - stats were last calculated on 03 December 2024.
Defining 'TN7'
This analysis is limited to properties whose postcode starts with "TN7", this is also called the postcode district. There are no official postcode district names so I've just labelled it TN7, Upper Hartfield. It is shown in red on the map below.
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Price per square metre
Knowing the average house price in TN7 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 July 2024, Jessups, , Upper Hartfield, TN7 4DL sold for £1,175,000. Given the internal area of 236 square metres recorded on the EPC, the price per sqm is £1,175,000 ÷ 236 sqm = £4,978.
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 TN7 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 houses vs flats in TN7
The chart above is called a histogram, it helps you see the distribution of house price per sqm in TN7 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £6,600 to £7,000, £7,000 to £7,400, £7,400 to £7,800 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 37 sales that took place in TN7, 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 TN7, Upper Hartfield. Notably, only 25% of properties that sold recently were valued at more than £6,300 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of TN7 homes.
Box plot of £ per sqm for TN7
Tip: click on the chart to see the values.
The chart above is called a boxplot (or a box-and-whisker 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. Upper Hartfield. The chart above shows a boxplot for 'TN7' as well as the 'TN' postcode area.
Property price map for Upper Hartfield
Have a look at the interactive price map I created for myself. Use it to explore 'TN7' house prices all the way down to individual property plots.
House price map for Upper HartfieldWill TN7 house prices drop in 2025?
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 TN7 (Upper Hartfield) compared with the wider postcode area 'TN'. You can extrapolate from this based on your own views on future interest rates, inflation and other factors.
House price index for TN7
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 'TN7' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in TN7 and is set to 100 in 2004. The chart compares trends for TN7, Upper Hartfield against those of the broader postcode area 'TN'. 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 Wealden 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 TN7
| TN area | TN7 district | |||
|---|---|---|---|---|
| Nominal | Real | Nominal | Real | |
| 20 yr per annum | 3.5% | 0.8% | 3.6% | 0.9% |
| 20 yr total | 99.9% | 18.4% | 102.7% | 20.1% |
| 10 yr per annum | 4.0% | 1.1% | 2.5% | -0.3% |
| 10 yr total | 47.5% | 12.0% | 28.0% | -2.8% |
| 5 yr per annum | 3.3% | -0.8% | 3.3% | -0.7% |
| 5 yr total | 17.5% | -3.8% | 17.7% | -3.6% |
| 1 yr per annum | -0.5% | -4.4% | -14.2% | -17.6% |
| 1 yr total | -0.5% | -4.4% | -14.2% | -17.6% |
This table complements the house price index chart above, presenting the data in a more detailed format. It breaks down the information into 20-year, 10-year, 5-year, and 1-year 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, TN7 district have seen a 0.9% annual change when adjusted for inflation. This translates to a total change of 20.1% in real terms.
- Over the past 5 years, TN area have seen a -0.8% annual change when adjusted for inflation. This translates to a total change of -3.8% in real terms.
Most recent TN7 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
Nearby geographies
The table below shows how 'TN7' compares to the other postcode districts nearby 'TN7'.
| District | Lower quartile | Median | Upper quartile | Sales in last 2yr |
|---|---|---|---|---|
| TN9 Tonbridge | £4,200 sqm | £4,870 sqm | £5,550 sqm | 479 |
| TN8 Edenbridge | £4,060 sqm | £4,910 sqm | £5,800 sqm | 285 |
| TN7 Upper Hartfield | £4,400 sqm | £5,000 sqm | £6,300 sqm | 37 |
| TN6 Crowborough | £3,820 sqm | £4,380 sqm | £4,930 sqm | 651 |
| TN5 Ticehurst | £4,200 sqm | £4,800 sqm | £5,440 sqm | 196 |
| TN40 Bexhill-On-Sea | £2,800 sqm | £3,400 sqm | £4,080 sqm | 694 |
| TN4 Tunbridge Wells | £4,250 sqm | £4,970 sqm | £5,680 sqm | 766 |
| TN39 Bexhill-On-Sea | £3,040 sqm | £3,730 sqm | £4,360 sqm | 789 |
| TN38 St Leonards-On-Sea | £2,870 sqm | £3,480 sqm | £4,150 sqm | 757 |
| TN37 St Leonards-On-Sea | £2,750 sqm | £3,410 sqm | £4,010 sqm | 568 |
Raw data
Our analysis of TN7 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 |
|---|---|---|---|
| Jessups, , | £1,175,000
Jul-2024
|
236 | 4,978 |
| 18, Rectory Field, | £492,500
Jun-2024
|
113 | 4,358 |
| 20 Oaklea Court, High St, | £260,000
Apr-2024
|
89 | 2,921 |
See the entire list of all sales in TN7 here.
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.