Yondr sustainability score: 28/100
Yondr designs, builds and runs large data centres for big technology customers. Yondr Group Limited, the company filing its UK group accounts, was incorporated in 2019, and its UK accounts show £81.5 million revenue, split between contract revenue and data centre consulting, with 118 employees on average in its 2025 year.
More about Yondr
The group as a whole reports 222 employees. It has been owned by DigitalBridge and La Caisse since 2025.
Founded 2019Head office London, United KingdomStaff ~222 (2025, group, Sustainability Report 2025 p.67; UK filer average 118)Revenue ~£81.5M (UK filer Yondr Group Limited, FY2025; group revenue not published)Website ↗
Yondr reported 150,664 tCO2e in 2025, up from 42,667 t in 2024, but that leaves out purchased goods and capital goods, the materials and equipment for its buildings, so the size deduction for an incomplete footprint (0.70x) applies. It says 51.7% of its energy is renewable, using certificates, with no contract share published. It discloses that clients also claim those certificates on 58% of its 2025 electricity. Its net zero 2030 goal for its own emissions has no outside validation and expects to use offsets. Two sites negatively affect protected or key biodiversity areas.
Yondr scores 28/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Scores are free. Companies can never pay for anything about their own score. Last verified November 2026.
That places Yondr joint 775th of 988 companies scored, and 31st of 32 in Construction / Real Estate.
What is Yondr doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Transparency & Accountability (7/10, 7/10). Weakest on Emissions Trajectory and Energy Source (0/10, 2/10).
Where Yondr lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
- Emissions from its own operations7/10Its own emissions aren't independently verified or tracked over several years.
- Emissions from its supply chain4/10Most of its supply-chain (Scope 3) emissions aren't measured.
- Whether its emissions are falling0/10No evidence its emissions are falling, not even from energy bills or mileage.
- How clean its energy is2/10No renewable energy tariff or major efficiency investment shown.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste5/10No measurable waste or recycling targets reported publicly.
- Its effect on water4/10No measured water footprint with reduction targets.
- Its climate targets3/10No specific targets with dates.
- How openly it reports7/10No annual impact report, or no pay linked to climate targets.
- Its record on controversies7/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Yondr's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Yondr's score based on?
14 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
21% of them were published by Yondr itself; the rest come from independent sources.
Its report shows 0 m³ withdrawn and 202,317 m³ consumed, without explanation; we show it as published.
11 of 14 sources are independent of the company.
“Gross scope 1 greenhouse gas emissions: 11,201 tCO2e”
“Figure 3 demonstrates that 89% of these are related to downstream leased assets”
“These activities fall under Yondr Operations UK Ltd”
“52 diesel fired Rolls Royce mtu 20V4000 DS3300 generators”
“Yondr has set a target to achieve net zero scope 1 and scope 2 GHG emissions (market-based) by 2030”
“data center developer Yondr's plans to build multiple data center buildings behind the small HOA community”
“According to his noise model, when the Yondr data centers are operational, noise levels will go up to 72-77 decibels”
“Thames Water had not objected to the plans”
“today announced the successful completion of the acquisition of Yondr Group”
“La Caisse partner to acquire Yondr from Cathexis Holdings”
“View the permit issued for Wexham Road Datacentre (Building A and B), Slough under the Industrial Emissions Directive.”
“68320 - Management of real estate on a fee or contract basis”
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How does Yondr compare with other construction / real estate companies?
Where Yondr sits among construction / real estate peers.
Among the 32 major construction / real estate brands we've scored, Yondr sits 31st of 32.
Who scores higher in Construction / Real Estate?
The 3 companies in the sector scoring nearest above Yondr.
Highlands Rewilding restores land on Scottish estates and has registered credits under the Woodland and Peatland Codes, but it publishes no emissions figures.
See the breakdown →Holcim reports comprehensive emissions data and leads in construction waste recycling, but relies overwhelmingly on intensity targets that mask stagnant absolute emissions and hide reliance on unproven CCUS technology.
See the breakdown →Bouygues reports detailed Scope 1, 2, and 3 emissions with SBTi-validated targets across all six business segments, but undermines credibility through intensity-based Scope 3 targets on buildings instead of absolute reductions.
See the breakdown →Which companies moved this week, and why.
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