The Built Review

Evidence for better buildings

Made for daily practice: analysis of what improves people's wellbeing and performance in the built environment.

For architects, real estate professionals, workplace and HR specialists and all who need evidence in practice.

Latest reports

Person seen from behind working at a desk in front of a panoramic window overlooking a forest

Latest report — Workplace

Pricing biophilia: what the evidence is worth

Read at the primary sources, the business case for nature in buildings is narrower than advertised and strong enough to act on.

10 Jun 2026 12 min 29 sources confident
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Empty modern hospital room with vital-signs monitors, IV stands and a steel sliding door, daylight from a window across the unoccupied bed.

Healthcare

Built to Wake: How Hospital Noise and Light Undermine Patient Sleep

10 Jun 2026 12 min
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Silhouette of a person sitting at a floor-to-ceiling window with a view over Potsdamer Platz in Berlin

Workplace

Germany's missing indoor-air bill

10 Jun 2026 12 min
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Tiled facade of an apartment block with net curtains in the windows and a resident looking out from an upper floor

Housing

What insurers don't ask about buildings

10 Jun 2026 11 min
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Glass towers rising from densely planted concrete terraces at the Parkroyal Collection Pickering in Singapore

Urban

Singapore's green mandate, sixty years in

10 Jun 2026 11 min
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From the report · honest ranges

What survives the primary sources

Vendor numbers in circulation (a 5 to 10 % biophilic rent premium, 16 % lower tenant turnover, sub-5 % market penetration, a 50 % architect-knowledge claim) failed sourcing and are excluded from this ledger.

Sick leave, best vs worst view and lighting conditions 53 vs 71 h/yr
Green-certified office rent premium, peer-reviewed 2.5–5 %
Daylight effect on retail sales, chain-wide 0–6 %
Learning-rate difference, most vs least daylit classrooms +20–26 %
Mixed methods and units: payroll records, sales transactions, test scores, stated preferences. Correlational evidence throughout.
Sources · Elzeyadi, 2011 · Eichholtz et al., 2010; Fuerst & McAllister, 2011; Reichardt et al., 2012; JLL, 2023 · Heschong, 2003 · Heschong Mahone Group, 1999/2003

Evidence base

Impact factors

The factors with the strongest bearing on outcomes in this report, each tied to named studies and rated for strength of evidence. Drawn from "Pricing biophilia: what the evidence is worth" · 10 Jun 2026

Factor Named studies Strength Status
Window view & glare control Heschong Mahone Group, 2003; Elzeyadi, 2011; Ulrich, 1984 Confident
Certification rent premium Eichholtz, Kok & Quigley, 2010; Fuerst & McAllister, 2011; Reichardt et al., 2012 Confident
Biophilic package pricing Gillis & Gatersleben, 2015; Dalton & Fuerst, 2018 Speculative