The Boost Society sustainability score: 19/100
Better than 0% of Construction / Real Estate
Below expectations starts at 31. The highest score on SINK is 71.
The Boost Society is a French student housing operator and developer managing approximately 40 residential buildings housing ~10,000 people, with a portfolio expansion pipeline targeting 20,000 residents by 2030. The group acquires properties via VEFA (off-plan purchase) and operates mixed-use residential assets across France.
More about The Boost Society
Founded in the mid-2010s, it is a mid-market player in European purpose-built student accommodation.
Founded 2014Head office Levallois-Perret, FranceStaff ~50 (holding entity)Revenue €7.4M (FY2023, holding entity; group AUM ~€1.3B)Website ↗
The Boost Society operates mid-sized student housing across France with no emissions data, no decarbonisation targets, and no renewable energy strategy. Portfolio expanding rapidly to 20,000 residents by 2030 without any climate commitment. Transparency limited to vague CSR messaging; no formal accountability structure.
The Boost Society scores 19/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified July 2026.
That places The Boost Society joint 991st of 1,023 companies scored, and 40th of 40 in Construction / Real Estate.
What is The Boost Society doing well, and where does it fall short?
Strongest on Controversies & Red Flags and Nature & Biodiversity Impact (8/10, 3/10). Weakest on Targets & Commitments and Carbon Footprint: Supply Chain (0/10, 1/10).
Where The Boost Society lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Its climate targetsSet emissions reduction targets.
- Emissions from its supply chainAssess where its supply-chain emissions come from.
- Whether its emissions are fallingShow its emissions are falling, even from energy bills or mileage.
Every question that lost points
- Emissions from its own operations2/10No emissions figures for its own operations, not even an estimate from energy bills.
- Emissions from its supply chain1/10No assessment of where its supply-chain emissions come from.
- Whether its emissions are falling1/10No 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 nature3/10No assessment of its effect on nature, and no basic environmental policy.
- How it uses materials and handles waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water2/10No monitoring of water use, or no measures to reduce it.
- Its climate targets0/10No emissions reduction targets.
- How openly it reports2/10No published sustainability data, or no one named as responsible for it.
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 The Boost Society's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleHas The Boost Society's score changed?
The Boost Society's score has moved from 27 to 19 across 2 recorded reviews, down 8 points.
- 27 → 19-87 November 2026
The small-company exception no longer applies: its latest revenue figure is for 2023, more than 24 months old. With no published emissions figure, the 0.70x size step now applies.
- Scored 277 November 2026
Correction, 7 November 2026: removed an unsourced emissions figure. Score unchanged.
What evidence is The Boost Society's score based on?
8 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
38% of them were published by The Boost Society itself; the rest come from independent sources.
“Thermal insulation meeting the high standards of RT 2012-20, an intelligent lighting system with presence detectors”
“The Boost Society is currently home to 10,000 young people across nearly 40 residences”
“The Boost Society (ex-KLEY) student-residence operator; holding-entity accounts, group ~10,000 beds”
“investment capacity of more than €1.3 billion and a pipeline of more than 16,000 beds”
“La résidence KLEY Saint-Ouen sera située au cœur d'un écoquartier de 100 hectares”
“The Boost Society accueille désormais 7 500 jeunes dans près de 30 résidences”
“Découvrez les engagements RSE de The Boost Society pour offrir des lieux de vie durables”
“THE BOOST SOCIETY (SIREN 803724699, ex-KLEY): chiffre d'affaires 7 387 951 EUR (2023), effectif 50, creee 2014, Levallois-Perret”
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How does The Boost Society compare with other construction / real estate companies?
The Boost Society sits at the bottom of the construction / real estate pack.
Among the 40 major construction / real estate brands we've scored, The Boost Society sits 40th of 40.
Who scores higher in Construction / Real Estate?
The 3 companies in the sector scoring nearest above The Boost Society.
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