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General

HOAI Service Phases

The nine service phases of the Fee Scale for Architects and Engineers (HOAI) structuring the planning process and determining fee calculation.

What are HOAI Service Phases?

The HOAI service phases (LP 1-9) divide planning into nine phases: basic evaluation (2%), preliminary planning (7%), design (15%), approval (3%), detailed planning (25%), procurement preparation (10%), procurement support (4%), construction supervision (32%), and object management (2%).

Since the 2019 CJEU ruling, HOAI fees are no longer binding. Planning services are typically procured through negotiated procedures.

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