The Boost Society sustainability score: 27/100

·Construction / Real Estate·Levallois-Perret, France·Founded 2014·Last verified 25 July 2026
27
out of 100
Significant gapsPending ReviewMixed evidence· 8 src

The Boost Society scores 27/100 (Significant gaps) on SINK's independent climate assessment — scored from public data only, no company payment can change a number. Last verified July 2026.

That places The Boost Society joint 650th of 809 companies scored, and 20th of 20 in Construction / Real Estate.

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.

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The calculation

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) × Scale
Industry base impact
Construction / Real Estate sector ceiling.
35 / 100
Performance score
Sum of the 10 rubric questions, scored 0–10 each.
24 / 100
Raw score
Weighted average before scale penalty.
(0.3 × 35) + (0.7 × 24) = 27.3
Scale penalty
Multiplier based on absolute emissions volume — physics-first.
× 1
Final score
Rounded. Significant gaps.
27 / 100
The ten questions

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 Emissions Trajectory (0/10, 1/10).

Where the evidence comes from

What evidence is The Boost Society's score based on?

8 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.

[1]Self-reported
KLEY CSR Initiatives

“Thermal insulation meeting the high standards of RT 2012-20, an intelligent lighting system with presence detectors”

Ongoing
Q1Q4Q6Q7
View →
[2]Self-reported
The Boost Society — The Group Overview

“The Boost Society is currently home to 10,000 young people across nearly 40 residences”

Ongoing
Q1Q3Q8Q10
View →
[3]Public record
Verif.com — KLEY SIREN 803724699 Registry

“The Boost Society (ex-KLEY) student-residence operator; holding-entity accounts, group ~10,000 beds”

Ongoing
Q1
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[4]Public record
Hospitality On — Boost Society, HIFE and KLEY Maturing

“investment capacity of more than €1.3 billion and a pipeline of more than 16,000 beds”

Unknown
Q2Q3
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[5]Public record
Hospitality On — Saint-Ouen Residence Development

“La résidence KLEY Saint-Ouen sera située au cœur d'un écoquartier de 100 hectares”

Unknown
Q5
View →
[6]Public record
Hospitality On — Portfolio Expansion Coverage

“The Boost Society accueille désormais 7 500 jeunes dans près de 30 résidences”

Unknown
Q3
View →
[7]Self-reported
The Boost Society — RSE Engagements

“Découvrez les engagements RSE de The Boost Society pour offrir des lieux de vie durables”

Ongoing
Q9
View →
[8]Public record
Societe.com — The Boost Society SIREN 803724699

“THE BOOST SOCIETY (SIREN 803724699, ex-KLEY): chiffre d'affaires 7 387 951 EUR (2023), effectif 50, creee 2014, Levallois-Perret”

Ongoing
Q9
View →

If you believe a source has been misread or a newer version exists, submit a challenge.

The Boost Society in context

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 20 major construction / real estate brands we've scored, The Boost Society sits 20th of 20.

20/20
The Boost Society's rank
40
Industry average
27
Industry low
60
Industry high
How this score has moved

Has The Boost Society's score changed?

today

As The Boost Society's score updates, the trajectory will appear here.

What's being contested

Has The Boost Society's score been challenged?

This score is not currently being contested.

Every challenge is published. We'd rather be corrected than wrong — that's the whole point.

No challenges submitted yet. If you have evidence that contradicts this score, you can challenge any question above — cite a public source and we'll review it.

About The Boost Society

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. Founded in the mid-2010s, it is a mid-market player in European purpose-built student accommodation.

Founded
2014
Headquarters
Levallois-Perret, France
Employees
~50 (holding entity)
Annual revenue
€7.4M (FY2023, holding entity; group AUM ~€1.3B)
Company website ↗
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