The elemental cost plan is arguably the best cost management template ever developed. By breaking down construction cost into recognizable building elements — substructure, frame, external walls, roof, services, and so on — it gives clients, designers, and QS professionals a clear, comparable view of where cost sits across a project, at any stage of design.

Importantly, there’s no contradiction in applying the elemental cost plan within a 5D BIM environment. What changes is simply the method by which quantities are derived — manual measurement versus 5D BIM model-based extraction. Everything else in the cost management workflow — the elemental structure, the pricing approach, the reporting format — remains exactly as it always has been.

This continuity matters because it means 5D BIM doesn’t require reinventing cost management practice; it fits within the framework already established by the profession. In this context, the AIQS Cost Management Manual (Volumes 1 & 2) remains the guiding practice, setting out how elemental cost plans should be structured and reported throughout a project’s lifecycle.

One specific requirement worth highlighting is the Manual’s approach to Gross Floor Area (GFA), broken into Fully Enclosed Covered Area (FECA) and Unenclosed Covered Area (UCA). Revit fully supports the measurement of these area types directly from the model, ensuring this foundational metric — used across nearly every elemental cost plan — is captured accurately and consistently from within the same environment as the design itself.

On the elemental breakdown and pricing side, the Workbook is designed to carry the full elemental cost plan through every project stage — from early conceptual pricing through to more detailed cost planning as design develops. It’s built to reflect the same elemental structure QS professionals already use, simply populated with 5D BIM model-derived quantities rather than manually measured ones.

As the Level of Development (LOD) increases through the project — from conceptual massing to precise, coordinated geometry — the elemental cost plan naturally becomes more reflective of the actual design. Early cost plans, built on indicative LOD 100–200 information, are necessarily broad; as the model matures toward LOD 300 and beyond, quantities sharpen, and the cost plan tightens in accuracy alongside it.

This is precisely why the elemental cost plan never becomes outdated in a 5D BIM environment. Rather than being replaced or rendered obsolete by design progression, it evolves continuously alongside the model — always current, always reflective of the latest design intent, from inception through to final account. 5D BIM doesn’t retire the elemental cost plan; it keeps it perpetually up to date.