Du kan gøre det ved at tilføje nogle få sammensatte operationer.
Tjek nedenstående kode, det burde virke.
SELECT CONCAT(housename, CONCAT(" ",CONCAT(housenumber, CONCAT(" ",CONCAT_WS(' ,',
NULLIF(address1, ''),
NULLIF(address2, ''),
NULLIF(address3, ''),
NULLIF(town, ''),
NULLIF(postcode, '')))))) AS concatedAddress FROM tblAddress;