Retrofit beats rebuild: the new planning default
Demolition is now the exception, not the norm. Applicants must show a Pre-Redevelopment Audit proving why an existing structure cannot be reused or adapted (City of London SPD, 2025). That flips value perceptions: components designed for disassembly, refurbishment, or reuse sit higher on every material schedule.
Whole-life carbon files land on every desk
Every major scheme must submit a Whole-Life Carbon Assessment that spans modules A1–C4, mirroring EN 15978. Developers will interrogate cradle-to-grave numbers long before a shovel hits ground, pulling figures from manufacturers’ EPDs to populate the spreadsheet.
Embodied carbon benchmarks tighten the screws
The SPD aligns with Greater London Authority (GLA) benchmarks: upfront carbon in a new office must slide under 950 kg CO₂e/m², while the aspirational threshold sits at 600 kg CO₂e/m² (GLA WLC Guidance, 2022). For refurbs, the UK Net Zero Carbon Buildings Standard pegs 2025 targets at 600 kg CO₂e/m² and trending lower by 2030 (UKNZCBS, 2024). Products without credible carbon data risk blowing the cap.
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EPDs: the passport for your materials
Planning officers do not grade marketing copy. They verify third-party numbers. An EN 15804-compliant EPD provides the ingredient list, carbon nutrition label, and methodological audit trail in one PDF, ready to drop into a WLC calculator. No EPD, no entry.
Circular economy documents favour modular, low-impact specs
Applicants must lodge a Circular Economy Statement detailing how components can be removed, reused, or recycled (City of London SPD, 2025). Modular façades with documented take-back schemes shine. So do products with recycled content verified in Section 3 of the EPD. Glazing units glued together for eternity? They fall to the bottom of the shortlist.
Timing: deadlines inside the City’s planning calendar
The SPD applies to applications validated after 1 April 2025. Retrofits hitting committee in Q4 2025 must finalise product schedules by midsummer to lock carbon numbers. Leave EPD creation until the eleventh hour and you may watch the committee date sail past, which would be embarassing.
Win the spec play: three quick moves
- Map your catalogue against the GLA carbon caps today.
- Fast-track EPDs for the SKUs that land under the 950 kg CO₂e/m² headline figure.
- Hand sales teams a one-page cheat-sheet linking each product’s EPD page number to the SPD requirement it satisfies.
Key Takeaway for 2025 bids
London’s Retrofit-First SPD compresses sustainability from a nice-to-have into a planning gatekeeper. Manufacturers who serve ready-made, third-party-verified carbon data will glide through that gate while slower rivals wait outside in the drizzle.
