Carbon and ESG governance for real estate portfolios
Carbon data that survives the audit.
Sustainify AI is a carbon accounting and ESG governance platform for UK real estate portfolios. Factor sets versioned and pinned per reporting period. Calculation runs stored with unique run IDs. Closed periods locked against silent restatements. Built for estates operating under SECR, CSRD and investor scrutiny.
- Portfolio grade
- Governed factors
- Assurance ready
- ISO 14064 compatible
Portfolio overview
Example Estates LLP
All buildings · 2024/25
Performance at a glance
Share of 10,998.0 tCO2e grossConsumption behind Scope 2
Footprint is 10,998.0 tCO2e, down 4.2% on the previous period, led by Scope 2.
Scope 3 sits at 35.6% of total and is still climbing. Bankside is the one to watch at 96.1 kgCO2e/m².
Emissions trend & reduction pathway
Year-over-year footprint by scope, against the required glidepath
You already know this
You can produce the number. You cannot prove how you produced it.
- The auditor asks how a figure was arrived at, and the answer is in a spreadsheet somebody has edited since.
- The GHG conversion factors updated, and last year's baseline quietly changed. Nobody told you.
- Your GRESB score is capped by how much of your data is estimated, and nobody can tell you exactly how much.
- A tenant disputes their recharge, and your allocation methodology is a tab in a workbook.
Reported · FY 2024/25
board pack, p.123,094.4
tCO2e. Produced on time, signed off, sent out.
Now show your working. The auditor walks it downwards.
RPT-08 / line 14
The report line the board saw
Scope 1, 2 and 3, one figure
entry 4471
A ledger entry underneath it
27,050,972 kWh × 0.01830 kgCO2e/kWh, ties out to 495.03 tCO2e
imp_8841
An import batch behind that
3,910 rows accepted. The factor version in force that day was never written down.
Sheet3!D42
workbook_final_v7.xlsx
A typed cell. The comment on it reads "as agreed with FM".
And then nothing.
no source document · no factor version · no owner · no timestamp
Depth you can actually evidence under questioning
Ungoverned carbon data is not a reporting inconvenience. It is an audit liability.
The platform
Three things, governed properly.
Governed calculations.
UK GHG Conversion Factors versioned and pinned per reporting period. Calculation runs stored with unique run IDs. Closed periods locked against silent restatements. Full Scope 1, 2 and 3 across the portfolio.
Governed cost recovery.
Tenant carbon allocation built into the platform. Time-bound rules across area, headcount, sub-meter and contractual agreements. Allocation feeds recharges, tariffs and carbon price models from the same dataset.
Governed intelligence.
The Living AI monitors the portfolio continuously, explains variance, identifies outliers and surfaces estimation exposure. Every answer traces back to the source activity record, the factor set and the run ID.
Data lineage · entry 4471
Data Lineage4471UK electricity · Bishopsgate
Read-time checks: MISSING_CASCADE · CV_BASIS_FALLBACK · STALE_PROVENANCE
History
- Recalculated against UK DEFRA GHG 2024, 4 rows14 Oct 2024
- Quantity corrected 27,050,792 to 27,050,972 kWh13 Oct 2024
- Entry imported from edf-2024-q3.csv12 Oct 2024
Feeds
- Dashboard
- Emissions Summary
- SECR / Reports
Living AI
It finds the problem, works out who needs to know, and tells them.
Most carbon software gives you a dashboard and waits for you to open it. Living AI does not wait. It detects the anomaly, assesses materiality against your reporting thresholds, identifies the right stakeholder for that asset and that scope, composes a precise, context-aware email, and sends it.
And when you do want to ask it something, you ask in plain English. It will also draft a SECR narrative, a GRESB commentary or a CSRD disclosure section from your governed data. Every answer traces back to the source record, the factor version and the run ID. If the data does not support an answer, it says so.
No human prompt. No manual review. No delay.
Living AI · scheduled briefing
To: sustainability@example.co.uk
Scope 2 rose 14% at Bankside last month.
- Bankside electricity is 14% above the trailing three-month mean.
- Fitzrovia gas has no readings for March, so the period is incomplete.
- Portfolio measured share improved from 79% to 82%.
Recommended: confirm the Bankside chiller schedule before the quarter closes.
Included, not upsold
You just gave every tenant enterprise ESG tools.
A startup on your third floor cannot afford sustainability software. Add them to your portfolio and they get access to the same platform your sustainability team uses. Free to them. Included for you.
- 01
Better tenant engagement
- 02
Better Scope 3 data
- 03
Stronger compliance submissions
Savile Row · one subscription, five accounts
Sustainify AI, your platform
Landlord subscription · unlimited tenant accounts
199.1
tCO2e returned to you
Northwind Studios
520 m² · full platform, £0 to them
12.6
tCO2e
Halden Legal
980 m² · full platform, £0 to them
31.4
tCO2e
Perigee Bio
1,640 m² · full platform, £0 to them
58.9
tCO2e
Marlowe & Field
2,180 m² · full platform, £0 to them
96.2
tCO2e
Common parts, landlord retained
30.0% of the demise
Down: the same tooling your sustainability team uses, extended to every occupier, included rather than upsold.
Up: their consumption comes back measured rather than requested, and lands in your Scope 3 as evidence.
Scope 3 is a data collection problem. This is how you solve it without asking anyone for a favour.
Two minutes
Would your carbon data survive external assurance?
Six questions. An honest score, and a list of exactly what would fail.
Built for the frameworks your auditors, investors and regulators require.
- UK GHG Conversion Factors
- SECR
- CSRD
- SFDR
- GRESB
- TCFD
- GHG Protocol
- AR5 GWPs
- BREEAM
- TOMs
- EPC
- ISO 14064
Insights
Latest thinking
Notes on getting the number right, for teams reporting under assurance.
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7 min read
Automating Utility Data Collection Across Portfolios
Manual utility data collection does not scale past a handful of buildings. Here is what automating utility data collection actually requires to work well.
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7 min read
Estimated vs Measured Data: How Data Quality Grades Affect ESG Scores
Data quality grades quietly decide how much of your GRESB score is trusted. Here is how estimated versus measured data actually affects the final outcome.

2 Sept 2026 · 7 min read
ESG Dashboard Metrics That Matter for Real Estate Board Reports
Most ESG dashboards are full of numbers nobody actually acts on. Here are the dashboard metrics that genuinely matter for a real estate board report today.

1 Sept 2026 · 7 min read
How to Present ESG Performance to Investors A Guide for Property Teams
A polished ESG slide means nothing without the data behind it. Here is how property teams should actually present ESG performance to investors properly.

31 Aug 2026 · 8 min read
TCFD vs CSRD vs SECR A Comparison Guide for UK Property Companies
Three frameworks three sets of rules one property company caught reporting all of them. Here is how TCFD CSRD and SECR actually differ and overlap.
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28 Aug 2026 · 8 min read
SFDR Reporting for Real Estate Funds: What ESG Data You Need
SFDR still binds real estate funds today reform or not. Here is exactly what ESG data Article 8 and 9 disclosure actually requires from a portfolio.
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27 Aug 2026 · 8 min read
ISSB Standards for UK Real Estate: What Property Teams Should Prepare For
UK SRS S1 and S2 the UK endorsed ISSB standards are voluntary now and may become mandatory from 2027. Here is what property teams should prepare for.
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26 Aug 2026 · 8 min read
UK GHG Conversion Factors 2026: What Changed and How It Affects Your Reports
DESNZ cut the UK electricity factor by 26 percent in June 2026. Here is what actually changed in the GHG conversion factors 2026 and what it means for you.
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21 Aug 2026 · 7 min read
BMS Data Integration for Carbon Reporting: What Property Teams Need to Know
Most BMS data never reaches a carbon report untouched. Here is what property teams need to know before they try to integrate it properly across a portfolio.

19 Aug 2026 · 7 min read
Linking EPC Ratings to Carbon Intensity: A Data Led Approach for Portfolios
Why EPC ratings and measured carbon intensity often diverge, and how a data led approach helps real estate portfolios reconcile both metrics properly.
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18 Aug 2026 · 7 min read
How Carbon Accounting Data Supports MEES Compliance Planning
How carbon accounting data supports MEES compliance planning from EPC baselines to retrofit prioritisation across large UK commercial portfolios today.
Governed carbon intelligence for your portfolio.
A one-hour session, tailored to your sector, portfolio size and compliance requirements. Not a generic pitch.