House prices in KT11 (Cobham)
This article shows price per square metre data and various charts to help you understand the housing market in KT11 - stats were last calculated on 05 March 2025.
Defining 'KT11'
This analysis is limited to properties whose postcode starts with "KT11", this is also called the postcode district. There are no official postcode district names so I've just labelled it KT11, Cobham. It is shown in red on the map below.
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You can click on the map above to change to a neighbouring district, or you can use the search form below.
Price per square metre
Knowing the average house price in KT11 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 January 2025, 27, Oak Road, Cobham, KT11 3BA sold for £3,200,000. Given the internal area of 459 square metres recorded on the EPC, the price per sqm is £3,200,000 ÷ 459 sqm = £6,971.
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 KT11 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 KT11
The chart above is called a histogram, it helps you see the distribution of house price per sqm in KT11 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £6,700 to £7,000, £7,000 to £7,300, £7,300 to £7,600 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 401 sales that took place in KT11, 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 KT11, Cobham. Notably, only 25% of properties that sold recently were valued at more than £8,160 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of KT11 homes.
Box plot of £ per sqm for KT11
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. Cobham. The chart above shows a boxplot for 'KT11' as well as the 'KT' postcode area.
Property price map for Cobham
Have a look at the interactive price map I created for myself. Use it to explore 'KT11' house prices all the way down to individual property plots.
Will KT11 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 KT11 (Cobham) compared with the wider postcode area 'KT'. You can extrapolate from this based on your own views on future interest rates, inflation and other factors.
House price index for KT11
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 'KT11' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in KT11 and is set to 100 in 2004. The chart compares trends for KT11, Cobham 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) – 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 KT11
| KT area | KT11 district | |||
|---|---|---|---|---|
| Nominal | Real | Nominal | Real | |
| 20 yr per annum | 3.8% | 1.0% | 4.2% | 1.4% |
| 20 yr total | 110.6% | 22.5% | 128.1% | 32.7% |
| 10 yr per annum | 2.0% | -1.0% | 2.8% | -0.3% |
| 10 yr total | 22.5% | -9.7% | 31.6% | -3.0% |
| 5 yr per annum | 2.3% | -2.0% | 4.4% | -0.0% |
| 5 yr total | 12.1% | -9.8% | 24.1% | -0.1% |
| 1 yr per annum | 3.4% | -0.2% | 8.9% | 5.2% |
| 1 yr total | 3.4% | -0.2% | 8.9% | 5.2% |
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, KT11 district have seen a 1.4% annual change when adjusted for inflation. This translates to a total change of 32.7% in real terms.
- Over the past 5 years, KT11 district have seen a -0.0% annual change when adjusted for inflation. This translates to a total change of -0.1% in real terms.
Most recent KT11 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 |
|---|---|---|---|
| Anyards Road, , KT11 2L | 88 sqm | £6,832 | 27 |
| Hogshill Lane, , KT11 2A | 110 sqm | £7,033 | 23 |
| Portsmouth Road, , KT11 1H | 95 sqm | £5,546 | 20 |
| St Andrews Gardens, , KT11 1H | 139 sqm | £6,722 | 20 |
| Freelands Road, , KT11 2N | 88 sqm | £6,118 | 20 |
| Between Streets, , KT11 1D | 73 sqm | £5,585 | 19 |
| Blundel Lane, , KT11 2S | 171 sqm | £6,792 | 19 |
| Portsmouth Road, , KT11 1J | 102 sqm | £5,222 | 16 |
Search for your street here.
Nearby geographies
The table below shows how 'KT11' compares to the other postcode districts nearby 'KT11'.
| District | Lower quartile | Median | Upper quartile | Sales in last 2yr |
|---|---|---|---|---|
| KT9 Chessington | £5,010 sqm | £5,710 sqm | £6,450 sqm | 456 |
| KT8 West Molesey | £5,360 sqm | £6,450 sqm | £7,630 sqm | 437 |
| KT7 Thames Ditton | £6,170 sqm | £7,010 sqm | £8,110 sqm | 243 |
| KT6 Surbiton | £5,630 sqm | £6,470 sqm | £7,400 sqm | 848 |
| KT5 Surbiton | £5,830 sqm | £6,520 sqm | £7,330 sqm | 418 |
| KT4 Worcester Park | £5,480 sqm | £6,130 sqm | £6,870 sqm | 611 |
| KT3 New Malden | £5,890 sqm | £6,600 sqm | £7,410 sqm | 713 |
| KT24 East Horsley | £5,870 sqm | £6,830 sqm | £7,650 sqm | 219 |
| KT23 Bookham | £5,240 sqm | £5,950 sqm | £6,630 sqm | 261 |
| KT22 Fetcham | £4,870 sqm | £5,640 sqm | £6,370 sqm | 653 |
Raw data
Our analysis of KT11 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 |
|---|---|---|---|
| 27, Oak Rd, | £3,200,000
Jan-2025
|
459 | 6,971 |
| 1 Curtain Pond Cottages, Downside Rd, | £605,000
Jan-2025
|
87 | 6,954 |
| 19, Brunswick Grove, | £830,000
Jan-2025
|
107 | 7,757 |
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.