Feb 07, 2023 by HM

House prices in Welwyn (AL6 9)

This article reveals price per square metre data and various charts to help you understand current housing market in Welwyn (AL6 9).

Price per square metre

Knowing the average house price in Welwyn 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
E.g. 8, Roman Way, Welwyn, sold for £695,000 on Aug-2023. Given the internal area of 136 square metres, the price per sqm is £5,110.

England & Wales have been officially metric for many decades. However house price per square foot is sometimes prefered by those of sufficiently advanced age. They may want to convert metres on this page to square feet.

The chart below is called a histogram, it helps you see the distribution of this house price per sqm data. To make this chart we put the sales data into a series of £ per sqm 'buckets' (e.g. £6,250-£6,500, £6,500-£6,750, £6,750-£7,000 etc...) we then count the number of sales with within in each bucket and plot the results. The chart is based on 102 sales in Welwyn (AL6 9) that took place in the last two years.

Distribution of £ per sqm for Welwyn (AL6 9)
Distribution of £ per sqm house prices in Welwyn

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.

That said, the spread of prices will give you a feel of the typical range to expect in Welwyn (AL6 9). Of the 102 transactions, half were sold for between £4,470 and £6,180 per square metre. Notably, only 25% of properties that sold recently were valued at more than £6,180m2. For anything to be valued more than this means it has to be more desireable than the clear majority of homes.

For the average, we calculate the 'median' or middle price. The median price per square metre in 'AL6 9' is £5,360. The table below shows how 'AL6 9' compares to neighbouring postcode sectors.

Postcode sector Lower quartile Middle quartile Upper quartile
AL6 9 Welwyn £4,470m2 £5,360m2 £6,180m2
AL6 0 Welwyn £4,960m2 £5,540m2 £6,190m2

Will Welwyn house prices drop in 2024?

I cannot tell the future and don't believe anyone who says they can. I can however plot price trends - I have done this in the scatter plot below for AL6 9 (Welwyn). From this one could infer a range of reasonable possible future price falls or rises. In the chart below, the red dashed line is the house price trend for AL6 9 and the blue dots are the individual property sales that inform this trend.

Price per square metre in Welwyn (AL6 9) over time
House price trends for Welwyn

Hover on any blue dot to see details of specific sales

Disclaimer: The data provided throughout this website about Welwyn and any other area, is not financial advice. Any information provided does not and cannot ever take in to account the particular financial situation, objectives or property needs of either you or anyone reading this information. Furthermore, I cannot guarantee the accuracy of any data shown. This information is based on sold prices and internal area data provided by Land Registry and other third parties - I do not verify the accuracy of the Welwyn data or any other data I am given.

Price map for Welwyn

I've just finished coding the map I link to below. I find it useful and I am sure it will help you in exploring Welwyn. You can zoom in all the way to individual properties and then all the way back out to see the whole country. The colours show the current estimated property values. I will explain more about the methodology and create a key next week.

Property price heatmap for Welwyn
House price heatmap for Welwyn

Street level data

Street Avg size Avg £/m2 Recent sales
Becket Gardens, Welwyn, AL6 9J 96m2 £4,841 15
Node Way Gardens, Welwyn, AL6 9F 73m2 £4,068 13
Butterwick Way, Welwyn, AL6 9G 138m2 £4,699 11
London Road, Welwyn, AL6 9H 83m2 £4,492 10
Wilshere Road, Welwyn, AL6 9P 100m2 £5,348 9
Frythe Avenue, Welwyn, AL6 9G 154m2 £5,291 9
St Marys Court, Welwyn, AL6 9A 72m2 £4,397 9
Codicote Road, Welwyn, AL6 9T 143m2 £5,782 9

Search for your street here.

New build activity

Street Avg size Avg £/m2 New build sales
Tomlinson Court, Welwyn, AL6 9G 93m2 £4,961 10

Tomlinson Court, Welwyn, AL6 9G has seen 10 new build sales in the last 4 years (average price £458,115). These new build homes typically have an internal area of 93 m2, with an average price of £4,961 m2. This £sqm average is £-399 below the average for AL6 9. New builds typically command a £ per sqm premium. In the case of Tomlinson Court the premium seems not to exist. Without more info we can only speculate why this may be. Perhaps it may be greater density and smaller gardens, but this is just a guess.

Raw data

Our analysis of Welwyn 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 m2 £/m2
8, Roman Way, Welwyn £695,000
136 5,110
4, Hensley Close, Welwyn £940,000
173 5,433
29, Wilshere Rd, Welwyn £611,500
138 4,431

See the entire list of all sales in Welwyn (AL6 9) here.


HouseMetric is a hobby, created out of a desire to see data and analysis not present on any free to use website. It is still a work in progress and I'll add more stuff in the near future.