Select comma separated value from multiple column

I need to select value with comma separated from more than one column.

But need to Ignore if value is NULL

this needs to be done in SQL SERVER 2008.

and getting result like

, THE PINNACLE, BUT need to ignore if value IS null (No need of extra comma)

SELECT TOP 100 ISNULL(BuildingNo, '') + isnull(BuildingName, '') AS AddressLine1

,COALESCE(BuildingNo + ', ', '') + COALESCE(BuildingName + ', ', '') AS AddressLine1

FROM v_AddressList VL

Getting result like

, THE PINNACLE, : with extra , in first if value is null