The Old Exchange

Office · EPC A · published · control basis: operational · 1,500 m²

Footprinti

16.8 tCO₂e

Uncertainty bandi

14.1 – 20.3 tCO₂e

Intensityi

11.2 kgCO₂e/m²

What the numbers say

Category 13 is 100% of this building

Tenant energy in leased space is effectively this building's entire footprint — Aurora Design Studio alone is 100% of it. The lever here is tenant engagement, not the landlord's own operations.

All tenant energy is measured data

Every tenancy reports on rung 1 (actual data) — the whole footprint is GRESB-eligible and the uncertainty band is tight.

Footprint is -12.0% over 2022–2024

A genuine downward trend — see the year-on-year chart below for the split between operational improvement and one-off effects.

Footprint by GHG category

Cat 13 — Downstream leased assets100%

Cat 1 — Purchased goods and servicesi—

Cat 2 — Capital goodsi—

Cat 3 — Fuel- and energy-related activitiesi—

Cat 4 — Upstream transportation and distributioni—

Cat 5 — Waste generated in operationsi—

Cat 6 — Business traveli—

Cat 7 — Employee commutingi—

Cat 8 — Upstream leased assetsi—

Cat 9 — Downstream transportation and distributioniNot applicable

Cat 10 — Processing of sold productsiNot applicable

Cat 11 — Use of sold productsiNot applicable

Cat 12 — End-of-life treatment of sold productsiNot applicable

Cat 13 — Downstream leased assetsi16.8 tCO₂e

Cat 14 — FranchisesiNot applicable

Cat 15 — Investmentsi—

All 15 GHG Protocol Scope 3 categories, in order. Categories 9–12 and 14 are not applicable to a CRE owner — the UKGBC guide marks them out.

Provenance — how 16.8 tCO₂e is derived

Record	kWh	Emission factor	Rung	tCO₂e
Aurora Design Studio Electricity · Tenant portal submission · evidence attached	81,200	DEFRA 2024 — UK electricity 0.2069 kgCO₂e/kWh	Rung 1	16.8
Total				16.8

Each record = activity quantity (kWh) × a pinned DEFRA emission factor. Records are append-only; corrections supersede, never overwrite.

Uncertainty — each record carries a tier-based σ (log-space); a correlated Monte Carlo (5,000 iterations) produces the 95% band 14.1–20.3 tCO₂e.

Method — HemeraScope asset-v1, UKGBC Table 4 accuracy ladder. Reproducible: the same inputs replay to the same number.

Factor lineage

Trace every kgCO₂e back to the exact emission factor row, version and vintage it came from — plus any analyst override that altered the calculated number.

Footprint over time

Down 12.0% since 2022 — a steady operational improvement as tenant energy is measured and reduced, not a one-off.

Tenancies — Cat 13 downstream leased assets

Tenant	Demised	Energy	Data quality	tCO₂e
Aurora Design Studio	1,100 m²	Landlord-procured	Rung 1 — actual tenant data	16.8
Unit 2 — vacant	400 m²	Landlord-procured	Vacant — not let	—

Methodology & disclosure

Actual data

100%

Estimated

GRESB-eligiblei

100%

SBTi >40% triggeri

Yes

Tenant energy resolved at Rung 1 — actual tenant data on the UKGBC Table 4 accuracy ladder.

Relevant Scope 3 activities & how to collect the data

highCat 13 — Downstream leased assetsrelevance 7.5

▸Use actual tenant energy data where readily available.
▸Where not, apply the tenant-energy estimation ladder (UKGBC Table 4).

mediumCat 1 — Purchased goods and servicesrelevance 4.7

▸Request a spend breakdown for the reporting year from procurement, by category/supplier.
▸Subtract spend already reported under energy or upstream transport.

mediumCat 2 — Capital goodsrelevance 4.7

▸Use spend data to split operating vs capital costs.
▸Ask finance for capital goods with acquisition dates.

mediumCat 3 — Fuel- and energy-related activitiesrelevance 4.7

▸Take the electricity and fuel figures already in the Scope 1 & 2 footprint.

lowCat 6 — Business travelrelevance 2.5

▸Pull mode, distance and class from the central travel-booking system.

lowCat 5 — Waste generated in operationsrelevance 2.5

▸Request waste quantity by disposal route from waste collectors and landlords.
▸Tenant waste is excluded from the boundary by default (optional for GRESB).