CRREM Library

Beta

Open-access market infrastructure for CRREM assessment

The complete, documented foundation for a CRREM assessment. Any investor can use it, any service provider can apply it with clients, any auditor can check against it, any market participant can read it — regardless of budget or technical capability. Commercial platforms that integrate CRREM into their own products do so via a License Partner agreement.

Who this is for

Real estate teams & consultants

Running assessments on your own portfolio, building in-house tools, or applying CRREM on behalf of clients.

Start with Assessment Guide

Software teams

Building CRREM-aligned platforms, dashboards, and integrations that bring assessment into your product workflow.

Start with Technical Blueprint

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01Read

Assessment Guide

Every step behind a CRREM assessment, clearly written down for practitioners and data-assurance professionals.

01Collect inputs

02Energy use intensity

03Emission factors

04Carbon intensity

05Pathway selection

06Misalignment year

PDF · 5.3 MB Read the guide

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02Download

Pathways & Datasets

All global CRREM Pathways, emission factors, and climate-zone mappings — versioned and ready to use.

Global Pathways44 countries · 18 property types 4.7 MB Emission FactorsPer-carrier actuals & projections 171 KB Postal Code LookupUS · CA · AU sub-national regions 3.7 MB HDD/CDD Lookup (EU)Climate-adjusted projections · optional 35.4 MB

v2.05 · 30 Apr 2026 Explore a pathway

schema

03Build

Technical Blueprint

A precise technical specification for anyone building a CRREM assessment tool from scratch. Made to suit AI-coding tools.

1{
2  "asset": {
3    "id": "A-001",
4    "name": "Midtown Tower",
5    "sector": "office",
6    "intensity_kgCO2_m2": 31.6
7  },

XLSX · 155 KB Read the spec

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04Compute

Worked Examples

Step-by-step worked examples showing how Assessment Guide rules translate to numbers — every formula visible and traceable.

Midtown Tower Office · NY · 7,500 m²
Misaligns 2025
Pacific Plaza Mall Shopping Center · HK · 22,000 m²
Misaligns 2036
Northgate Quarter Mixed-Use · London · 12,000 m²
Misaligns 2036
Tokyo Logistics Park Warehouse · Tokyo · 15,000 m²
Misaligns 2032

XLSX · 178 KB See worked examples

Working with a coding assistant?

Drop the Technical Blueprint into Claude, GPT, or Codex as context. Schema and prose, no parsing required. The Blueprint is the specification your assistant reads to learn how CRREM works; the reference fixtures are worked input/output examples it can use to check its math against ours.

Blueprint · Markdown Blueprint · JSON Schema Reference fixtures · JSON

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CRREM Risk Assessment Tool — ExcelLegacy

Free Excel-based tool for building-level transition risk. Retiring 1 July 2026, replaced by the Library.

EU N. America APAC

If you used the Excel tool, here's where each part of it lives now

Calculation methodology and assumptions

Assessment Guide

Pathway lookups and emission factors

Pathways & Datasets

Formulas, field definitions, validation rules

Technical Blueprint

Worked example calculations to check against

Worked Examples

What’s changed 6 updates · latest 29 July 2026 Affects results

Version history for the open-access Library. Entries marked Affects results change what an assessment computes — re-check any assessment built on an earlier version.

29 July 2026

Assumptions Disclosure Table v1.1

Adds a District Heating / Cooling emission-factor disclosure row and widens the vacancy options to cover partial vacancy extrapolated to full occupancy. Accredited Service Providers complete this table as part of their deliverables.
29 July 2026

Machine-readable exports v1.1

Blueprint schema, Blueprint Markdown, reference fixtures, and the expected-outputs summary regenerated from the v1.1 workbooks. The schema now states that the district cooling factor is held flat, and the fixtures carry the v1.1 asset set and results.
28 May 2026

Technical Blueprint v1.1 Affects results

District cooling emission factor is now held flat through 2050. Previously it declined over time, coupled to the grid (the same as district heating).
28 May 2026

Emission Factors v2.05 updated Affects results

Carrier factors refreshed to the UK Government 2025–26 conversion factors. Added biogas, wood fuels, and a separate North America carrier set (EPA-sourced).
28 May 2026

Assessment Guide v1.03

Methodology guide refreshed and aligned with the current Pathways and datasets.
30 Apr 2026

CRREM Library v2.05

Initial open-access release: Global Pathways, emission factors, climate-zone lookups, Assessment Guide, Technical Blueprint, and Worked Examples.

Each workbook also carries a detailed, cell-level Change Log on its own sheet.