Van insurance does then to cost more then car insurance unfortunately, that's why its soo worth checking to make sure you get a good deal by using a comparison service such as this. Why not give it and try and see if you can save?
Van insurance is very similar to a car insurance except with potential elements for 'carriage of goods for hire or reward'. With this cover your van insurance will protect against the risk of the goods within your vehicle getting damaged during transit, meaning either your personal possessions or those of your customers will be protected (you can even advise clients that their belongings are insured whilst you transport them).
Policy types are offered as below but all the insurers have differences in cover and its always best to check with your van insurance to make sure what you need is covered.