Slow broadband speeds can wipe as much as 20 per cent off the value of properties and lack of superfast connectivity in an area can be a dealbreaker in house sales, property experts have said.

With growing numbers of people going online to perform tasks ranging from working to grocery shopping and streaming entertainment, good broadband has become critical.

Property search website Rightmove has now added a broadband speed checker to every one of its listings alongside factors such as quality of local schools and transport links.

Estate agents said broadband speed is so vital that buyers are walking away from a purchase if they discover that superfast speeds are not available in that area.

Rightmove said research it conducted among among 3,000 people found that broadband details were ranked as a more important feature when searching for property than information on transport links and nearby schools.

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