Final answer:
A home appraiser is responsible for providing a professional estimate of a property's market value, which is integral in mortgage loan processes and determining an owner's equity.
Step-by-step explanation:
A professional estimate of a property's market value or opinion of value, based on established methods and using trained, professional judgment, is performed by a home appraiser. The role of the home appraiser is critical in the process of a real estate transaction, particularly when it involves financing through a mortgage loan. As banks and financial institutions rely on the accurate valuation of assets, a home appraiser’s evaluation helps in determining the amount that can be borrowed. This is linked to the concept of equity, where the market value of the house is offset against what is still owed to the bank. For instance, if the value of the house is $200,000 and the owner owes $180,000, the equity would be $20,000. This appraisal value can also affect other aspects like escrow payments for home insurance and property taxes.