<![CDATA[In practice, third-party victims often encounter legal obstacles and difficulty in claiming compensation because consultants hide behind the principle of contractual personality and the lack of explicit regulations detailing external protections in the Construction Services Law, so that the process of recovering victims’ rights is suboptimal. Das Sollen: Construction consultancy service providers should bear clear and firm legal responsibility to third parties if proven to have committed professional errors or negligence that violates safety standards, codes of ethics, and the principle of prudence, as mandated by Article 1365 of the Civil Code concerning Unlawful Acts. Legal protection for third parties is a form of public justice that cannot be ignored by the barriers of internal contractual relationships in the project. This research uses normative legal research, which is examined through a statutory approach, a conceptual approach, and a case study approach using primary, secondary, and tertiary legal materials analyzed qualitatively using a descriptive-analytical method. Indonesian positive law through Law Number 2 of 2017 concerning Construction Services clearly regulates the liability of service providers for building failures due to planning or supervision, where third parties have a legal basis to claim compensation under Article 1365 of the Civil Code even though they are not bound by a direct contract, with professional standards, codes of ethics, and duty of care as the primary references for determining professional error. The form of legal responsibility of construction consultancy service providers can arise through default or unlawful acts, where the consultant can be held responsible for paying material and immaterial compensation if it is proven that the losses to third parties are a direct result of professional errors such as negligence in technical analysis, errors in working drawings, or supervision that does not meet standards.]]>
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