Start here: confirm what your own health system provides
Before any conversation about private cost, it is worth confirming what your own health system already offers, since microtia surgery, as reconstruction of a condition present at birth, is funded as core paediatric care in most developed health systems, delivered through a team that includes audiology and ENT alongside the surgeon.
That team matters here more than in many reconstructive procedures, because hearing assessment and management run alongside the reconstruction rather than before or after it, and a funded pathway typically keeps both under one coordinated service. Confirming your child’s specific entitlement, through the paediatric or ENT team already involved, is worth doing before comparing any private price.