What does STANDARD 1 require an appraiser to do when developing a real property appraisal?

STANDARD 1 of the Uniform Standards of Professional Appraisal Practice (USPAP) emphasizes the necessity for appraisers to utilize both due diligence and due care when developing an appraisal for real property. This involves an informed and thorough approach to the collection and analysis of data, ensuring that the appraiser conducts a comprehensive examination of all relevant information that can impact the appraisal conclusion.

Applying due diligence means that the appraiser actively seeks out and verifies pertinent data, market trends, and other factors that might influence the property's value. Due care ensures that the appraiser performs their duties with a high level of professional competence, safeguarding against negligence. Together, these principles guide appraisers to maintain integrity and accuracy in their work, which is essential for producing credible and reliable appraisal reports.

The other options do not align with the requirements set forth in STANDARD 1. Seeking client approval at all stages may not be necessary for all appraisal activities and could potentially limit the appraiser's ability to conducted objective assessments. Limiting research to local market data could lead to an incomplete analysis, as appraisals should consider broader economic factors and comparative data where applicable. Exclusively using historical sales data can also be restrictive, as market conditions change and appraisals must reflect current realities rather than only