ok...so the attachment didn't go through. lest see if I can explain in words.

the sheets all have the same headers:
A1 - Property ID
A2 - Construction year
A3 - Mechanical Renovation Date
A4 - Electrical Renovation Date
A5 - Plumbing Renovation Date

The "Import" sheet starting on Row "B" I need to be able to combine the data from "Data1" and "Data2".

Data1:
A B C D E F
Property ID Construction Date Mechanical Electrical Plumbing
2 14265 1956
3 14266 1980 1999
4 14267 1620 1990 1990 1990
5 14269 1890

Data2 is vertually identical but the dates are different:
A B C D E F
Property ID Construction Date Mechanical Electrical Plumbing
2 14265 1950
3 14266 1978 1999 1998 1997
4 14268 1990
5 14270 2000

I need to be able to combine these property ID's while keeping the most recent years in the C:F columns.

Any idea how to do this?? is it a Macro button? is it a sheet filled with formulas??

Thanks for the help.
John