House prices in 'NG31 7', Grantham

Price per square metre data and charts revealed. Latest statistics for the housing market in 'NG31 7' (Grantham) - calculated on 05 January 2026.

Defining 'NG31 7'

This analysis is limited to properties whose postcode starts with "NG31 7", this is also called the postcode sector. There are no official postcode sector names so I've just labelled it NG31 7, Grantham. It is shown in red on the map below.

Want to change geography?

You can click on the map above to change to a neighbouring sector, or you can use the search form below.

Price per square metre

Knowing the average house price in NG31 7 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 November 2025, 34, Rosemary Crescent, Grantham, NG31 7JS sold for £215,000. Given the internal area of 87 square metres recorded on the EPC, the price per sqm is £215,000 ÷ 87 sqm = £2,471.

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 NG31 7 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 'NG31 7' vs 'NG31'

The chart above is called a histogram, it helps you see the distribution of house price per sqm in NG31 7 To make this chart we put all the sales data into a series of £ per sqm 'buckets' (e.g. £2,350 to £2,500, £2,500 to £2,650, £2,650 to £2,800 etc...) we then count the number of sales with within in each bucket and plot the results. The histogram is based on 385 sales that took place in NG31 7, Grantham 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 NG31 7, Grantham. Notably, only 25% of properties that sold recently were valued at more than £2,540 sqm. For anything to be valued more than this means it has to be more desireable than the clear majority of NG31 7 homes.

Box plot of £ per sqm for NG31 7

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. Grantham. The chart above shows a boxplot for 'NG31 7' as well as the 'NG31' postcode district.

  • 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 'NG31 7' is £2,100.
  • 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 385 transactions in NG31 7, Grantham half were sold for between £1,760 and £2,540 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; 385 for NG31 7, Grantham.

    • Property price map for Grantham

    Have a look at the interactive price map I created for myself. Use it to explore 'NG31 7' house prices all the way down to individual property plots.

    Property price heatmap for Grantham
    House price map for Grantham

    Grantham house price forecasting

    House prices in NG31 7 fell -2.6% in the last year, -6.3% 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 NG31 7 (Grantham) compared with the wider postcode district of NG31.

    House price index for NG31 7

    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 'NG31 7' property prices over the last 20 years. The index is calculated from the average price paid per sqm for property in NG31 7 and is set to 100 in 2004. I'm comparing the trends for NG31 7,Grantham with the wider postcode district of NG31 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 South Kesteven 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 NG31 7
    NG31 7 sector NG31 district
    Nominal Real Nominal Real
    20 yr per annum 2.6% -0.1% 2.6% -0.2%
    20 yr total 67.7% -2.8% 66.8% -3.3%
    10 yr per annum 4.3% 1.1% 4.0% 0.8%
    10 yr total 52.3% 11.8% 48.0% 8.7%
    5 yr per annum 4.4% -0.1% 4.6% 0.1%
    5 yr total 23.9% -0.7% 25.3% 0.4%
    1 yr per annum -2.6% -6.3% 1.9% -1.9%
    1 yr total -2.6% -6.3% 1.9% -1.9%

    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, NG31 district have seen a -0.2% annual change when adjusted for inflation. This translates to a total change of -3.3% in real terms.
    • Over the past 5 years, NG31 district have seen a 0.1% annual change when adjusted for inflation. This translates to a total change of 0.4% in real terms.

    Most recent NG31 7 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
    Victoria Street, Grantham, NG31 7B 77 sqm £1,627 31
    Kedleston Road, Grantham, NG31 7F 91 sqm £2,345 26
    Harlaxton Road, Grantham, NG31 7A 123 sqm £1,737 25
    Hudson Way, Grantham, NG31 7B 71 sqm £2,178 21
    Huntingtower Road, Grantham, NG31 7A 101 sqm £2,043 20
    Stamford Street, Grantham, NG31 7B 84 sqm £1,630 19
    Coles Way, Grantham, NG31 7G 83 sqm £2,474 15
    Springfield Road, Grantham, NG31 7B 86 sqm £1,541 14

    Search for your street here.

    Nearby geographies

    The table below shows how 'NG31 7' compares to the other postcode sectors in NG31.

    Sector Lower quartile Median Upper quartile Sales in last 2yr
    NG33 5 South Witham £1,940 sqm £2,420 sqm £2,810 sqm 157
    NG33 4 Corby Glen £2,650 sqm £2,910 sqm £3,160 sqm 176
    NG32 3 Ancaster £2,360 sqm £2,790 sqm £3,100 sqm 134
    NG32 1 Barrowby £2,630 sqm £2,960 sqm £3,360 sqm 95
    NG31 9 Grantham £2,100 sqm £2,500 sqm £2,840 sqm 327
    NG31 8 Grantham £2,240 sqm £2,680 sqm £3,030 sqm 528
    NG31 7 Grantham £1,760 sqm £2,100 sqm £2,540 sqm 385
    NG31 6 Grantham £1,330 sqm £1,530 sqm £1,740 sqm 167

    Raw data

    Our analysis of NG31 7 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
    34, Rosemary Crescent, Grantham £215,000
    Nov-2025
    		 87 2,471
    84, Barrowby Gate, Grantham £310,000
    Nov-2025
    		 110 2,818
    145, Victoria St, Grantham £100,000
    Nov-2025
    		 66 1,515

    See the entire list of all sales in NG31 7 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.