In all proceedings before county commissioners under this chapter, section eighteen of chapter thirty-four shall be applicable. In all proceedings brought under section fourteen, if a petition is filed after an award of damages has been made and the damages are increased, or if no award has been made and the petitioner is found to be entitled to damages, he shall recover costs, which shall be taxed as in actions at law; otherwise he shall pay costs.
Mass. Gen. Laws ch. 79, § 38