"The relationship between land prices and house prices is the most important factor. Land in London is so scarce - and planning permission so hard to come by - it is barely worth the cost and effort of attempting your own project. However, other regions show enormous savings, especially the South East and South West.”, say Nicholas Leeming, director of propertyfinder.com.

Building your own house in the UK costs 20 per cent less than buying one, Reuters reported, as quoted by Dnevnik daily.

If you decide to invest in the construction of a house with three bedrooms, a living room and a kitchen box, this would cost about 283 637 euro. An already built home of such size in Great Britain would cost 356 722 euro, taking account of regional variations.

Propertyfinder.com portal believes that home buyers taking on the construction themselves can save over 73 000 euro on land, materials and labour costs. This is 20.1 per cent cheaper, Reuters reports.

Currently 20 000 self-builds are commissioned each year, making up 12 per cent of all housing completions - a figure which is set to grow as homeowners look for a viable way to afford their ideal home. However, plots' prices are different in the different regions.

The construction of a three-bedroom house in East Midlands costs 203 459 euro, while a similar venue in London would cost an average 393 228 euro. A hectare of land with a construction permit in London costs to 12.79 million euro. In the Midlands, it costs 2.53 million euro.

"The relationship between land prices and house prices is the most important factor. Land in London is so scarce - and planning permission so hard to come by - it is barely worth the cost and effort of attempting your own project. However, other regions show enormous savings, especially the South East and South West.”, say Nicholas Leeming, director of propertyfinder.com.