House prices in KT7 (Thames Ditton)

Price per square metre data and charts to help you understand the housing market in KT7 - stats were last calculated on 29 October 2025.

Defining 'KT7'

This analysis is limited to properties whose postcode starts with "KT7", this is also called the postcode district. There are no official postcode district names so I've just labelled it KT7, Thames Ditton. It is shown in red on the map below.

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Price per square metre

Knowing the average house price in KT7 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 2025, Flat 5 Weston Court, 37, The Broadway, Thames Ditton, KT7 0LU sold for £405,000. Given the internal area of 65 square metres recorded on the EPC, the price per sqm is £405,000 ÷ 65 sqm = £6,230.

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 KT7 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 KT7

The chart above is called a histogram, it helps you see the distribution of house price per sqm in KT7 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £7,250 to £7,500, £7,500 to £7,750, £7,750 to £8,000 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 294 sales that took place in KT7, 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 KT7, Thames Ditton. Notably, only 25% of properties that sold recently were valued at more than £8,040 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of KT7 homes.

Box plot of £ per sqm for KT7

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. Thames Ditton. The chart above shows a boxplot for 'KT7' as well as the 'KT' postcode area.

  • Median: The horizontal line inside the box represents the median (£ per square meter). This is the midpoint of the data, meaning 50% of the prices are below this value, and 50% are above. The middle price per square metre in 'KT7' is £7,080.
  • Interquartile Range (IQR): The box spans from the 25th percentile (Q1) to the 75th percentile (Q3). This is the range where the middle 50% of the data lies, giving a good indication of the typical price spread. Of the 294 transactions in KT7, Thames Ditton half were sold for between £6,170 and £8,040 per square metre.
  • Whiskers: In our case, the whiskers extend from the 9th percentile (at the lower end) to the 91st percentile (at the upper end), This provides a slightly broader view of the distribution by including the middle 82% of records. The whiskers capture most of the variation but exclude extreme outliers caused by data errors in recording sold house prices or internal area.
  • 'n=' is the number of property transactions the box plot is based on; 294 for KT7, Thames Ditton.

    • Property price map for Thames Ditton

    Have a look at the interactive price map I created for myself. Use it to explore 'KT7' house prices all the way down to individual property plots.

    Property price heatmap for Thames Ditton
    House price map for Thames Ditton

    Will KT7 house prices drop in 2025?

    House prices in KT7 fell -0.2% in the last year, -3.9% after inflation. Whether or not this trend will continue depends on many factors, such as wage growth, net migration, interest rates and the level of house building. No one can predict these things with certainty however we can plot the historic trends in house prices in KT7 (Thames Ditton) compared with the wider postcode area 'KT'.You can extrapolate from this based on your own views.

    House price index for KT7

    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 'KT7' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in KT7 and is set to 100 in 2004. The chart compares trends for KT7, Thames Ditton against those of the broader postcode area 'KT'. 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 Elmbridge 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) – 1
    In 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 KT7
    KT area KT7 district
    Nominal Real Nominal Real
    20 yr per annum 3.7% 0.9% 4.1% 1.3%
    20 yr total 105.0% 18.8% 122.3% 28.8%
    10 yr per annum 1.8% -1.3% 1.3% -1.8%
    10 yr total 19.0% -12.6% 13.5% -16.6%
    5 yr per annum 1.7% -2.7% 2.1% -2.3%
    5 yr total 9.0% -12.6% 11.2% -10.9%
    1 yr per annum 0.5% -3.3% -0.2% -3.9%
    1 yr total 0.5% -3.3% -0.2% -3.9%

    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, KT area have seen a 0.9% annual change when adjusted for inflation. This translates to a total change of 18.8% in real terms.
    • Over the past 5 years, KT area have seen a -2.7% annual change when adjusted for inflation. This translates to a total change of -12.6% in real terms.

    Most recent KT7 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
    Summer Road, , KT7 0Q 102 sqm £7,183 21
    Rushett Close, , KT7 0U 81 sqm £8,045 17
    Lynwood Road, , KT7 0D 168 sqm £5,141 17
    Queens Road, , KT7 0Q 85 sqm £7,565 17
    Portsmouth Road, , KT7 0T 63 sqm £6,828 17
    Thistledene, , KT7 0Y 132 sqm £7,136 15
    Warwick Gardens, , KT7 0R 63 sqm £5,764 13
    Speer Road, , KT7 0P 88 sqm £8,834 13

    Search for your street here.

    Nearby geographies

    The table below shows how 'KT7' compares to the other postcode districts nearby 'KT7'.

    District Lower quartile Median Upper quartile Sales in last 2yr
    KT9 Chessington £5,000 sqm £5,740 sqm £6,390 sqm 484
    KT8 West Molesey £5,400 sqm £6,350 sqm £7,400 sqm 498
    KT7 Thames Ditton £6,170 sqm £7,080 sqm £8,040 sqm 294
    KT6 Surbiton £5,820 sqm £6,590 sqm £7,460 sqm 913
    KT5 Surbiton £5,920 sqm £6,590 sqm £7,410 sqm 467
    KT4 Worcester Park £5,470 sqm £6,190 sqm £6,940 sqm 665
    KT3 New Malden £5,820 sqm £6,630 sqm £7,380 sqm 766
    KT24 East Horsley £5,830 sqm £6,600 sqm £7,500 sqm 195
    KT23 Bookham £5,210 sqm £5,980 sqm £6,740 sqm 267
    KT22 Fetcham £4,850 sqm £5,680 sqm £6,540 sqm 753

    Raw data

    Our analysis of KT7 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
    Flat 5 Weston Court, 37, The Broadway, £405,000
    Sep-2025
    		 65 6,230
    9, Ditton Reach, £855,000
    Sep-2025
    		 154 5,551
    2, Mount Holme, £880,000
    Aug-2025
    		 150 5,866

    See the entire list of all sales in KT7 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.