How to get remove Blank or white page in PDF exported in SSRS

• Click on Report > Report Properties > Layout tab (Page Setup tab in SSDT-BI)
• Make a note of the values for Page width, Left margin, Right margin
• Close and go back to the design surface
• In the Properties window, select Body
• Click the + symbol to expand the Size node
• Make a note of the value for Width

To render in PDF correctly Body Width + Left margin + Right margin must be less than or equal to Page width. When you see blank pages being rendered it is almost always because the body width plus margins is greater than the page width.

Remember: (Body Width + Left margin + Right margin) <= (Page width)