Reading a Building's GHG Emissions Profile: A Practical Guide

Every benchmarked commercial building now has a public GHG emissions profile. Here is how to read it, what the numbers actually tell you, and how to use it in due diligence.

Published 2026-04-03 · By ecoMetric · fundamentals

Every benchmarked commercial building in a BPS jurisdiction now has a GHG emissions profile — a public record of its greenhouse gas emissions by source, intensity, and trend. These profiles are the backbone of building performance regulation, ESG disclosure, and increasingly lender and tenant evaluation. Yet many brokers still treat the emissions number as an opaque regulatory data point rather than a readable story about the building.

This guide walks through how to read a GHG emissions profile the way a sophisticated analyst does — and how to translate it into useful deal insight.

The GHG Protocol framework

Global GHG accounting follows the GHG Protocol, which divides emissions into three scopes:

• Scope 1 — Direct emissions from sources the building owns or controls. For buildings, this is primarily combustion of on-site fossil fuels: natural gas, fuel oil, propane used for heating, hot water, cooking, or emergency generation. Refrigerant leaks are also Scope 1.
• Scope 2 — Indirect emissions from purchased electricity, steam, chilled water, or heat. The building doesn't burn the fuel on-site, but the energy it purchases was generated by burning fuel elsewhere.
• Scope 3 — All other indirect emissions — upstream supply chain, tenant operations, embodied carbon in construction materials, commuter emissions, etc. Most BPS laws exclude Scope 3 from compliance calculations.

For BPS compliance, Scope 1 + Scope 2 is what counts. A building's emissions profile is therefore primarily a combination of its on-site fuel combustion and its purchased energy.

The shape of a typical building profile

For a typical North American office building:

• Scope 1: 30–50% of total emissions (mostly heating gas, sometimes hot water and cooking).
• Scope 2: 50–70% of total emissions (electricity for lighting, cooling, plug loads, elevators, domestic hot water if electric).

For a retail or supermarket building, electricity-heavy operations push Scope 2 share even higher (70–85%). For a hospital or hotel, Scope 1 tends to dominate because of heating and hot water intensity.

The energy-to-emissions conversion

Converting energy use to GHG emissions requires emission factors:

• Natural gas — approximately 53 kg CO₂e per MMBtu (standard).
• Fuel oil #2 — approximately 74 kg CO₂e per MMBtu.
• Electricity — varies dramatically by region based on grid mix:
  • Upstate NY (hydro-heavy): ~175 kg CO₂e per MWh
  • NYC (mix): ~300 kg CO₂e per MWh
  • Ontario (nuclear + hydro): ~30 kg CO₂e per MWh
  • West Virginia (coal-heavy): ~700 kg CO₂e per MWh
• District steam — varies by plant, typically 50–80 kg CO₂e per MMBtu.

This is why identical buildings in different regions can have dramatically different emissions. A gas-heated Class B office in Manhattan has a higher total carbon footprint than an identical electric-heated building in Toronto — not because the Toronto building operates better, but because its grid is cleaner.

Reading the scope breakdown

A building's emissions report usually shows both total GHG and the scope breakdown. A few patterns to recognize:

High Scope 1, low Scope 2: Gas-heated, electric-minimal building. Often an older building with steam heat and window AC. Retrofit priority: heating electrification.

Low Scope 1, high Scope 2: Electric-heated or district-energy building. Often newer or retrofitted. Scope 2 dominates. If grid decarbonizes, building emissions drop automatically.

Both high: Large old building with both gas heating and heavy electrical loads. Major retrofit candidate.

Both low: High-performance building, possibly LEED Platinum or new construction. Typically compliant with BPS targets.

Emissions intensity metrics

Absolute emissions tell you how much a building emits. Intensity metrics let you compare:

• kg CO₂e / sq ft / year — the most common metric. Used by BERDO.
• tonnes CO₂e / sq ft / year — LL97's unit. Just the above divided by 1,000.
• kg CO₂e / occupant / year — less common but useful for operational evaluation.
• kg CO₂e / $ revenue — relevant for tenant disclosure (the tenant ESG angle).

For BPS compliance, intensity per square foot is almost always the relevant metric.

Trends over time

Single-year emissions data is a snapshot. Trends are more revealing:

• Flat or rising emissions over 3–5 years: operational or structural problem. Building is not improving. Likely to fail tightening BPS caps.
• Steady decline: usually indicates active energy management or retrofit program. Positive trajectory.
• One-year spike: often operational anomaly (weather extreme, occupancy change, vacancy). Not necessarily a problem if subsequent years normalize.
• One-year drop followed by rebound: possibly COVID-era vacancy, not a structural improvement.

Three to five years of data is the minimum to draw reliable conclusions. Most benchmarking portals now show this history publicly.

Weather and occupancy normalization

A building's raw emissions vary with weather and occupancy. A hot summer pushes up cooling emissions. A vacant floor pushes down plug loads. Some benchmarking data is weather-normalized (adjusted for standard climate), and some is occupancy-normalized.

If you're comparing two years of data and one was unusually hot or cold, check whether the numbers are weather-normalized. If not, at least know that the year-over-year delta is noisy.

What the emissions profile tells you about the building

Is this a gas-heated or electric-heated building? Scope 1 share is the fastest tell. Gas-heated buildings will need heating electrification to meet long-horizon BPS caps.

Is the building well-operated or poorly-operated? Compare its intensity to peer buildings. A Class B office at 25 kg CO₂e/sq ft is well-operated; at 50 kg CO₂e/sq ft, it's a candidate for retrocommissioning.

Is the building on a compliance trajectory? Plot emissions against the 2030, 2035, 2040 BPS caps. Is the current trend line approaching or exceeding the cap?

What's the next retrofit opportunity? The largest emissions source is usually the next target. High Scope 1 → heating electrification. High Scope 2 → efficiency improvements and renewable energy procurement.

Using emissions data in due diligence

Before closing on an acquisition:

• Pull 3–5 years of emissions history.
• Compare against peer buildings.
• Calculate projected fine exposure under relevant BPS caps.
• Estimate retrofit capital needed for long-horizon compliance.
• Factor both into the acquisition price.

For acquisitions in BPS cities, this is now standard institutional due diligence — increasingly, buyers walk away or negotiate price adjustments based on emissions trajectory.

Using emissions data in leasing

For tenants with sustainability commitments:

• A building's emissions profile is now part of lease evaluation.
• Some tenants require specific emissions performance as a lease condition.
• Lease structures are adopting emissions pass-through for future fines.

Brokers representing tenants should have the building's profile ready before recommending any space in BPS markets.

Common pitfalls

Comparing unlike buildings. A 40 kg CO₂e/sq ft hospital is doing well; a 40 kg CO₂e/sq ft office is average. Always compare within property type.

Ignoring regional grid differences. Ontario and upstate NY buildings have structurally lower Scope 2 regardless of building quality.

Missing Scope 1 detail. A profile showing "100 tonnes emissions" with no scope breakdown leaves the most important retrofit question unanswered. Demand the breakdown.

Assuming emissions will drop with grid decarbonization alone. For Scope 2, partially true — if the grid decarbonizes. For Scope 1 (on-site combustion), grid decarbonization doesn't help at all. Only electrification does.

The integrated view

A well-read GHG emissions profile tells you:

1. How much the building emits (absolute and intensity).
2. Where the emissions come from (Scope 1 vs 2, fuel mix).
3. How the trajectory looks (trend over years).
4. What the retrofit opportunity is (biggest emission source).
5. How it compares to peers (percentile in property type).
6. Whether it's on track for BPS compliance (current vs target caps).

This is the foundation of both regulatory compliance work and meaningful sustainability strategy. For commercial real estate professionals, being fluent in these profiles is now as essential as being fluent in cap rates.