LEED AP ID+C Simulator

Updated on 29 September 2026. What’s new: the exam now follows LEED v5, with 85 scored questions across seven content areas, and the LEED v4 version closed on 28 June 2026

LEED AP ID+C is the USGBC credential for professionals who design, specify and build commercial interiors, and it earns its place when tenant fit-outs are your daily work. The exam is 100 multiple-choice questions in 120 minutes, with 170 out of 200 needed to pass. It now tests LEED v5, so older study material no longer fits. This guide covers the exam facts, the interior-specific content, what the credential changes on real projects and a study route.

Who is LEED AP ID+C really for, and who should pick a different specialty?

LEED AP ID+C sits in the family of LEED AP with specialty credentials that USGBC and its certifying body GBCI run. Each specialty pairs the same core green-building knowledge with one rating system. USGBC describes the Interior Design and Construction specialty as serving people who take part in the design, construction and improvement of commercial interiors and tenant spaces that offer a healthy, sustainable and productive place to work. The phrase to hold on to is tenant space. An ID+C project is usually a fit-out inside a building somebody else owns, so the decisions on the table are partitions, ceilings, floor finishes, lighting, furniture, fixtures, mechanical zoning inside the lease line and the way the site is run while the work goes on. It is not about the shell, the core or the structure.