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This framework applies at feasibility and concept stage.

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Step 1: Existing Building Assessment

Evaluate:

• Structural viability
• Heritage constraints
• Embodied carbon retention potential
• Adaptability potential

Step 2: Comparative Strategy Review

Document:

• Retention strategy (baseline)
• Partial demolition option
• Full demolition option (if relevant)

For each:

• Carbon implications (qualitative minimum)
• Planning risk
• Cost implications
• Programme implications