When someone dies, either with a will or a trust, the assets owned by the decedent have to be valued to determine the fair market value. The date used for valuation of assets is usually the date of death. Sometimes the document, whether a will or a trust, will provide that another date can be used such as 6 months from the date of death. The important thing is that the date is consistent for all of the assets.
Assets that have to be valued can be real property, personal property, investments, bank accounts, IRAs, pension and retirement plans, stocks, bonds, mineral rights, and business interests. Some of these may not be trust assets but still have to be valued if there is going to be an issue with estate taxes. For example, assets held in joint tenancy may not be subject to probate or trust administration, but they still have to be valued for estate tax purposes.
Property such as real property is valued by obtaining a written appraisal by a licensed experienced professional appraiser. The appraisal should include descriptions and photos of the subject property, comparable sales, and a determination of value. Sometimes real property can also include having to appraise personal property as well such as farm equipment, livestock, crops, etc. or in the case of a professional building, the value of equipment and trade fixtures.