House prices in SO51 (Romsey)

Price per square metre data and charts to help you understand the housing market in SO51 - stats were last calculated on 29 October 2025.

Defining 'SO51'

This analysis is limited to properties whose postcode starts with "SO51", this is also called the postcode district. There are no official postcode district names so I've just labelled it SO51, Romsey. It is shown in red on the map below.

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Price per square metre

Knowing the average house price in SO51 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, 15, Mount Pleasant, Romsey, SO51 8GP sold for £125,000. Given the internal area of 90 square metres recorded on the EPC, the price per sqm is £125,000 ÷ 90 sqm = £1,388.

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 SO51 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 SO51

The chart above is called a histogram, it helps you see the distribution of house price per sqm in SO51 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £4,350 to £4,500, £4,500 to £4,650, £4,650 to £4,800 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 851 sales that took place in SO51, 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 SO51, Romsey. Notably, only 25% of properties that sold recently were valued at more than £5,170 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of SO51 homes.

Box plot of £ per sqm for SO51

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. Romsey. The chart above shows a boxplot for 'SO51' as well as the 'SO' 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 'SO51' is £4,490.
  • 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 851 transactions in SO51, Romsey half were sold for between £3,910 and £5,170 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; 851 for SO51, Romsey.

    • Property price map for Romsey

    Have a look at the interactive price map I created for myself. Use it to explore 'SO51' house prices all the way down to individual property plots.

    Property price heatmap for Romsey
    House price map for Romsey

    Will SO51 house prices drop in 2025?

    House prices in SO51 grew 1.8% in the last year, -2.1% 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 SO51 (Romsey) compared with the wider postcode area 'SO'.You can extrapolate from this based on your own views.

    House price index for SO51

    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 'SO51' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in SO51 and is set to 100 in 2004. The chart compares trends for SO51, Romsey against those of the broader postcode area 'SO'. 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 Test Valley 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 SO51
    SO area SO51 district
    Nominal Real Nominal Real
    20 yr per annum 2.9% 0.1% 3.2% 0.4%
    20 yr total 77.5% 2.9% 88.6% 9.3%
    10 yr per annum 2.9% -0.2% 3.0% -0.1%
    10 yr total 33.4% -2.1% 34.9% -0.9%
    5 yr per annum 2.5% -1.9% 3.4% -1.1%
    5 yr total 13.1% -9.3% 18.0% -5.4%
    1 yr per annum 1.0% -2.8% 1.8% -2.1%
    1 yr total 1.0% -2.8% 1.8% -2.1%

    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, SO area have seen a 0.1% annual change when adjusted for inflation. This translates to a total change of 2.9% in real terms.
    • Over the past 5 years, SO51 district have seen a -1.1% annual change when adjusted for inflation. This translates to a total change of -5.4% in real terms.

    Most recent SO51 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
    Cutforth Way, , SO51 0B 93 sqm £3,974 22
    Middlebridge Street, , SO51 8H 72 sqm £5,109 21
    Viney Avenue, , SO51 7N 79 sqm £3,929 21
    Duttons Road, , SO51 8L 70 sqm £5,135 17
    Winchester Road, , SO51 8J 84 sqm £4,370 15
    Botley Road, , SO51 5P 63 sqm £3,697 15
    Sutherland Close, , SO51 7T 39 sqm £3,786 14
    Botley Road, , SO51 5A 76 sqm £4,651 13

    Search for your street here.

    Nearby geographies

    The table below shows how 'SO51' compares to the other postcode districts nearby 'SO51'.

    District Lower quartile Median Upper quartile Sales in last 2yr
    SP5 Downton £3,570 sqm £4,130 sqm £4,810 sqm 466
    SO53 Chandlers Ford £3,730 sqm £4,330 sqm £4,900 sqm 790
    SO52 North Baddesley £3,770 sqm £4,300 sqm £4,830 sqm 205
    SO51 Romsey £3,910 sqm £4,490 sqm £5,170 sqm 851
    SO50 Eastleigh £3,160 sqm £3,730 sqm £4,290 sqm 1,294
    SO45 Hythe £3,230 sqm £3,750 sqm £4,390 sqm 782
    SO43 Lyndhurst £4,240 sqm £4,910 sqm £6,150 sqm 116
    SO42 Brockenhurst £4,950 sqm £5,940 sqm £7,250 sqm 109
    SO41 Milford On Sea £4,330 sqm £5,190 sqm £6,090 sqm 907
    SO40 Totton £3,490 sqm £4,100 sqm £4,720 sqm 1,104

    Raw data

    Our analysis of SO51 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
    15, Mount Pleasant, £125,000
    Sep-2025
    		 90 1,388
    69, Ashdown Way, £370,000
    Sep-2025
    		 82 4,512
    40, Fairview Drive, £317,500
    Sep-2025
    		 81 3,919

    See the entire list of all sales in SO51 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.