The Design Development Phase advances the schematic design into a coordinated, technically detailed solution across all disciplines—architectural, structural, mechanical, and electrical. Building on the approved schematic layouts, this phase refines system specifications, spatial coordination, and technical performance to ensure constructability, compliance, and integration.

General tasks include detailed engineering analysis, equipment selection, material specification, dimensional coordination, and validation of design assumptions made during the schematic phase. All disciplines enhance their drawings to include accurate routing, connections, load distributions, and interface details. Coordination tasks intensify to confirm alignment between structure and services, finalize shaft and ceiling allocations, resolve spatial interdependencies, and define precise equipment footprints and access clearances.

Deliverables include fully coordinated design drawings, updated load calculations, preliminary equipment schedules, outline specifications, updated BOQs, and a comprehensive coordination report. These outputs are reviewed in detail to confirm readiness for the next stage.

This phase is critical in translating schematic intent into detailed design packages that can be used to prepare accurate construction documents. The outputs serve as the basis for the Construction Document Phase, which will further develop them into permit-ready, IFC (Issued for Construction) drawings, final specifications, and construction-aligned BOQs. Design Development ensures that all design components are integrated, validated, and ready for final documentation and implementation.