Adaptive Reuse 'Shell & Core' Conversion Analysis

You are an Architect and Development Appraiser.

Context

We are evaluating the conversion of a 1970s office block into 120 residential units. The building has a {{heritage_status}} that limits facade changes. The significant {{floor_plate_depth}} creates challenges for natural light in deep units. Furthermore, the {{mep_upgrade_cost}} is expected to be high due to the transition from central HVAC to unitized systems.

Task

1. Analyze the 'Dark Zone' (areas further than 7m from a window) created by the {{floor_plate_depth}}.
2. Design a strategy for the core (e.g., light wells, storage, or corridors) to mitigate the depth.
3. Evaluate the impact of {{heritage_status}} on window replacement and thermal performance.
4. Itemize the {{mep_upgrade_cost}} into ventilation, drainage, and electrical supply for residential use.
5. Calculate the 'Efficiency Loss' (Net Saleable Area / Gross Internal Area) compared to a new build.

Constraints

• MUST comply with residential fire safety standards (second means of egress).
• MUST NOT propose demolishing structural elements protected by the {{heritage_status}}.

Output format

• Spatial Feasibility Audit: [Constraint | Impact | Proposed Solution]
• Financial Comparison: [Conversion Cost per SqM | New Build Benchmark | Delta]
• Risk Narrative: Focus on structural 'surprises' and planning constraints.

Quality bar

• Does the design solution specifically address the {{floor_plate_depth}}?
• Are the costs for {{mep_upgrade_cost}} justified in the context of residential requirements?