I suggest you contact an insurance company for a quote. Here are some factors that will determine the cost: square ft., bedrooms, bathrooms, age and type of roof, year built, alarm system etc. Something else to consider is have you had any insurance claims?
I'm sure you know that when you have multiple types of insurance coverage ( e.g., car, R.V. etc,) with the same insurance company, you can get a better rate.
Hope this information helps you.