The search was part of the on-going probe into election fraud during May 2007 elections when Labour's Lydia Simmons lost her Central ward seat to former Tory Eshaq Khan after 23 years. A special election court earlier this year found that fake names were used to cast votes.
Khan faces criminal charges along with five other men, including Slough deputy mayor Mohammed Aziz. The group are due back at Reading Crown Court on Friday, August 8.