"Specialist military teams" have started clean-up work at the house today.
British personnel have started decontamination work on Sergei Skripal's home in Salisbury.
Mr Skripal and his daughter Yulia were contaminated with the nerve agent Novichok at the property in March 2018.
It is thought the decontamination work at the Christie Miller Road property will take several weeks and cordons have been enforced around the house.
This latest clean-up operation is not thought to be linked to the identification by of two Russian nationals as suspects over the Salisbury nerve agent attack.
The British military has 120 personnel involved in the general clean-up in Salisbury after an original deployment in April.
They completed decontamination of the Maltings area, where the two Skripals were found, in May.
The Department for Environment, Food and Rural Affairs (DEFRA) are overseeing the decontamination of Mr Skripal's house.
A DEFRA spokesperson said: “Clean-up efforts are ongoing in Christie Miller Road as part of our tailored decontamination plans for each of the affected sites.
“Specialist military teams are beginning the process of testing and removing items, a precautionary measure to ensure that any potential contamination is appropriately dealt with.
"Our number one priority is making all sites safe so South Wiltshire can get back to normal."
Public Health England say risk to the public in Salisbury and Amesbury remains low, however, they are advising people not to pick up unknown items from the ground.