Block assessment additions need incriminating search material; a valuation report alone cannot justify undisclosed income treatment.

In block assessment proceedings, an addition for alleged unexplained cost of construction cannot be sustained solely on a valuation report where no incriminating material is found in search and the amounts already appear in the regular books of account. Chapter XIV-B is confined to undisclosed income detected as a result of search and does not replace regular assessment. Where there is no seized material showing understatement of cost, any dispute may at most be considered in regular assessment, not as block undisclosed income. The addition based only on the valuation report was therefore unsustainable, and deletion of the addition was upheld in favour of the assessee.

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Issues: Whether, in block assessment proceedings, an addition towards cost of construction could be sustained solely on the basis of a valuation report when no incriminating material was found in search and the amounts were already reflected in the regular books of account.

Analysis: The addition was made after the Assessing Officer rejected the books of account and relied on the valuation report to treat the difference in estimated cost of construction as undisclosed income. The governing principle is that Chapter XIV-B operates only to assess undisclosed income detected as a result of search and does not substitute regular assessment. Where the disputed amounts are already entered in the regular books and no seized material shows understatement of cost, the matter may at the highest be examined in regular assessment, not as block undisclosed income.

Conclusion: The addition based only on the valuation report was not sustainable in block assessment, and the finding deleting the addition was upheld in favour of the assessee.

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