Heath Lambert Insurance Services (HLIS) has won the household business account for Admiral.
HLIS will place cover to a panel of insurers for Admiral's Elephant and Diamond brands.
HLIS managing director Paul Smith said that Admiral had piloted the service for four months with the Elephant brand and was now in a "long-term partnership arrangement".
He added that the Diamond brand, which caters for women motorists, would start to offer the household facility before the end of the year.
Users of the service can click on an icon on the Elephant website if they want to buy household cover, and are then transferred straight through to technology operated by HLIS.
Apart from Admiral, HLIS has a number of affinity and white label clients and employs around 380 staff based at various contact centres, although the biggest growth is online business.
"We have seen more than 500% growth in our online business in the past 18 months," Smith said.
"We now sell more policies online than through our contact centres."