Rooms that are not included in the above-grade room count may add substantially to the value of a property--particularly when the quality of the "finish" is high. For that reason, the appraiser should report the basement or other partially below-grade areas separately and make appropriate adjustments for them on the "basement and finished areas below-grade" line in the "sales comparison analysis" grid. To assure consistency in the sales comparison analysis, the appraiser generally should compare above-grade areas to above-grade areas and below- grade areas to below-grade areas. The appraiser may deviate from this approach if the style of the subject property or of any of the comparables does not lend itself to such comparisons. However, in such instances, he or she must explain the reason for the deviation and clearly describe the comparisons that were made.