The month-long operation to recover firearms at a property in Wyverstone in April has resulted in an overspend of £160,000 by Suffolk Police.
The figure is highlighted in a report to the Suffolk Police and Crime Commissioner.
Specialist search officers were on the scene at the home of the late James Arnold, a former chairman of Wyverstone Parish Council who was arrested in March on four charges of being in possession of a prohibited weapon.
Mr Arnold had been held in custody at HMP Belmarsh in south London whilst awaiting a hearing at Ipswich Crown Court.
However, he died in July while on remand, aged 49, and the case was discontinued. He had been suffering with terminal cancer.
A spokeswoman for Suffolk Police said officers had remained at the scene, located on Potash Road, for four weeks to ensure public safety while weapons were recovered and evidence gathered.
The Diss Express understands that the total number of weapons discovered in the search of the property and surrounding land was a “three figure sum.”
Andy Mellen, the current Wyverstone Parish Council chairman, told the Diss Express earlier this month that things were getting back to normal after the intense spotlight brought about by this police operation.
He also called on Suffolk Police to release information on the weapons, stating that some may have been replicas.