My landlord has no meter for our floor but can give us its own Scope 1 and 2 totals: how do we work out our share in Scope 3 Category 8?

The Scope 3 technical guidance calls it the lessor-specific method. Take the landlord's Scope 1 and 2 emissions, then multiply by your leased area over the total area of the landlord's assets. The printed formula has no occupancy term, unlike the single-building formula.

When this applies

Category 8 covers leased assets not already in your Scope 1 or 2. Under operational control, many tenants report the space they run in Scope 2, so check that first on the leased factory page linked below. The Greenhouse Gas (GHG) Protocol guidance gives a choice of three methods and a decision tree: use the asset-specific method if you have site fuel and energy data, the lessor-specific method if the lessor can give Scope 1 and 2 data, and the average-data method otherwise.

The formula (Formula 8.3)

1. For each lessor, add its Scope 1: fuel litres times the fuel factor, plus refrigerant leaked in kilograms times the refrigerant factor, plus any process emissions.
2. Add its Scope 2: kilowatt hours (kWh) of electricity, steam, heating or cooling times the matching factor.
3. Multiply the lessor's Scope 1 plus Scope 2 by (area, volume or quantity of your leased asset) divided by (total area, volume or quantity of the lessor's assets).
4. Sum across lessors.

Two things to check before you use it

• The decision tree in the guidance asks whether the lessor "can provide scope 1 and scope 2 emissions data, allocated to the relevant leased asset". The method text and Formula 8.3 also allow the lessor's totals to be allocated by area, volume or quantity. We read the formula as the working rule, and a figure the landlord has already allocated to your space is better still.
• The denominator is the total of the lessor's assets, not just your building. Formula 8.2 for a single building does include an occupancy rate; Formula 8.3 does not. Do not mix the two.

Data to collect from the landlord

• Total fuel, electricity and refrigerant leakage for the year, or its Scope 1 and 2 total.
• Total area of all its assets and the area you lease.
• Its factors and base year, so your report can say what was used.

Two landlords (example figures)

• Landlord 1: 600,000 kilograms (kg) of carbon dioxide equivalent (CO2e) over 8,000 square metres. You lease 400: 600,000 x 400 / 8,000 = 600,000 x 0.05 = 30,000 kg
• Landlord 2: 250,000 kg CO2e over 5,000 square metres. You lease 150: 250,000 x 150 / 5,000 = 250,000 x 0.03 = 7,500 kg
• Total Category 8 from leased space: 30,000 + 7,500 = 37,500 kg CO2e

The landlord totals and areas are example figures, not published data. Say in your report that the figure is an allocation.

What Senseible does here

Senseible reads fuel invoices and electricity bills into monthly records. It can read your own premises' bills. A landlord's company-wide total is a figure you request and note yourself.

• Floor share with occupancy rate
• Leased factory: which scope
• Leased space for part of a year
• Free calculators

Sources: GHG Protocol Technical Guidance for Calculating Scope 3 Emissions, Category 8 (Figure 8.1, Formulas 8.2 and 8.3)

Last reviewed 2026-11-06. Formulas are from Chapter 8 of the Technical Guidance. Re-check if the guidance is updated.