Quick answer
Most high-value home insurance runs $3,000 to $10,000 or more per year, with homes in the $750,000 to $1 million replacement-cost range typically landing toward the lower end of that band and larger custom estates running higher. Some carriers price it as a percentage of dwelling value instead, generally 1 to 5 percent, which produces a similar range for most Ohio properties in this category.
The number moves based on a few specific things: the home’s actual rebuild cost (not its market value), the scope of scheduled valuables attached to the policy, the umbrella liability limit, and which carrier is writing it. A standard captive carrier and a specialist carrier like Cincinnati Insurance or Chubb can land on meaningfully different numbers for the same home, because they’re underwriting it differently, not just pricing it differently.
The only way to get an accurate number for a specific property is a full asset review. Anything else is an estimate based on averages that may not reflect your home at all.