Investigating Sick Building Syndrome in UK workplaces

Most people in the United Kingdom spend more than ninety percent of their time indoors — at home, in offices, in classrooms, in healthcare settings and in transport hubs. Yet the air inside these buildings is frequently two to five times more polluted than the air outside, and in poorly ventilated spaces it can be far worse. Indoor air carries a complex mixture of fine particulates, volatile organic compounds, carbon dioxide, nitrogen dioxide, formaldehyde, mould spores, radon and bioaerosols. Each of these has measurable effects on cognitive performance, respiratory health, sleep quality and long-term disease risk.

The science is now unambiguous. Elevated CO₂ above 1,000 ppm reduces decision-making accuracy by up to fifteen percent. Chronic exposure to PM2.5 — even at concentrations once considered safe — is linked to cardiovascular disease, stroke and accelerated cognitive decline. Damp and mould in housing contribute to childhood asthma, eczema and persistent respiratory infection. Radon, the second leading cause of lung cancer in the UK after smoking, remains undetected in thousands of homes across affected regions.

SickBuildingSyndrome.uk exists to make this evidence accessible. We translate guidance from CIBSE TM40, BS EN 16798, the WHO 2021 air-quality guidelines, BREEAM Hea 02, the WELL Building Standard, COSHH Regulation 9 for local exhaust ventilation, TR19 for ductwork hygiene, HTM 03-01 for healthcare ventilation, and HSE and UKHSA technical notes into clear, practical advice for building owners, facilities managers, employers, designers and homeowners.

Whether you are investigating headaches and fatigue in a workplace, scoping a ventilation upgrade, preparing for a BREEAM assessment, monitoring a school during the winter heating season, or testing a new-build home for VOC off-gassing, the goal is the same: turn invisible air into measurable, manageable, healthier indoor environments. Every page on this site is written and reviewed by environmental specialists with first-hand experience of UK buildings.