A bomb disposal squad spent more than two hours at the Surrey home of the French Alps shooting spree victims after police raised concerns about items found at the property.
Neighbours were evacuated from the area as experts examined the mock-Tudor house in the affluent village of Claygate.
Officers from the Royal Logistic Corps arrived in a bomb disposal truck at around 10am on Monday and left shortly after midday.
A cordon which had been extended to block the road in front of the property was later taken down.
Attention on the family home intensified as police in Annecy, France, waited to question seven-year-old Zainab al-Hilli, who has regained consciousness following the attack that left her parents dead.
Her father Saad al-Hilli, 50, was murdered in his car alongside his dentist wife Iqbal on Wednesday while the family holidayed in the picturesque region.
Mrs al-Hilli's mother also died in the shooting along with Sylvain Mollier, 45, a French cyclist who apparently stumbled across the attack.
Zainab's younger sister Zeena, four, who survived after she hid behind her mother, flew back to Britain with carers on Sunday.