REScheck vs COMcheck: The Ultimate 2025–2026 Comparison

Choosing between a REScheck vs COMcheck Energy Efficiency Report can make or break your building permit approval. These two DOE energy compliance tools look similar, but using the wrong one will get your project rejected and cost you weeks of delays. REScheck is designed for residential buildings with three stories or fewer, while COMcheck handles commercial projects and taller multifamily structures. With the 2024 IECC now adopted in most jurisdictions, understanding which tool supports your local code edition is critical. This comparison breaks down exactly when to use REScheck vs COMcheck, what each tool calculates, and how to avoid the most common mistakes that lead to permit rejection in 2025

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