It depends on which melody you're using, but we use these chords:

HOUSE CARPENTER

Am                   G         Em       Am
Well met, well met, my own true love
          C          G            E
Well met, well met, cried he
      Am      C                   G          Em
I've just returned from the salt, salt sea
            Am          G       Am
And it's all for the love of thee


hope it helps