There is water seepage downstairs, and the property requires that my wooden floor be removed for inspection. Can I refuse?

The facts are clear and the reason is clear. This reason was caused by accident. Try to be careful not to have an accident in the future I don't think it is necessary to tear down the floor.

My opinion: 1, may refuse to demolish the building. 2. If the property must be demolished, in case it is demolished and there is no cheating underneath, you can claim for losses. However, it is best to write an agreement with the property before the demolition, and try to write it clearly to prevent claims from being wrangled.