The insurance of valuables and art at premises where works are going on can be difficult.
Most insurers will exclude cover for fine art and jewellery during the continuance of works because of both security and accidental damage reasons.
If you are remaining in the property and are able to maintain part of it discreetly from the works and carry on your former level of security it is possible that a solution can be found.
It is advisable though to include the cost of removal and storage in your project budget or at least the cost of temporary works to secure the items of value in one room.