Building biology
Building biology, carried further.
Building biology — from the German Baubiologie, sometimes written as bau biology — is the study of how a building affects the health of the people living in it. It looks at a house the way a doctor looks at a patient: the air it breathes, the water it serves, the light and sound it gives, the materials it is made of, and the quiet of the places where you sleep.
The discipline
What building biology actually is.
Building biology began in Germany in the 1960s, when builders and doctors started asking a simple question: if a person spends ninety percent of their life indoors, why does almost nobody study whether the indoors is good for them? The answer became a discipline — one that treats air, moisture, light, sound, materials and the electromagnetic environment as parts of a single system.
A building biologist works differently to most trades. They are not repairing a fault or installing a product; they are reading the building itself — how air moves, where moisture sits, what the finishes emit, what the bedroom does to a night’s sleep. In Australia the work is usually reactive: someone notices staining, or a smell that will not leave, or a family member who is well outdoors and unwell at home.
We start much earlier than that.
Prevention, not response
The difference between preventing a problem and answering one.
Most building biology in Australia happens after the fact. A family discovers mould behind a wardrobe. A moisture problem that was written into the building details years earlier — a slab edge left uninsulated, a bathroom with no planned path for damp air — has finally shown itself. The building biologist walks into a home that is already sick, and the work becomes remediation: testing, removal, repair, and often months of living around it.
That work matters, and we do it. But it is the least interesting version of the discipline. The same knowledge, applied at the drawing stage, prevents the problem entirely — which is why the Homey Standard treats building biology as one voice among eight, present from the first meeting rather than after handover.
Our building biologists sit with the architects while the design is still soft — when a wall can move, a window can change, and a ventilation strategy can be drawn in instead of retrofitted. They watch the decisions that quietly decide how a home behaves for decades: where moisture will condense, where air will go stale overnight, which surfaces will run cold.
Being preventative rather than reactive is the whole point. A home designed for health never needs the painful conversation; a home designed without it eventually has that conversation somewhere.
The assessment
What a building-biology assessment looks at.
Air and moisture
Ventilation, filtration, humidity and the pollutants that gather indoors — fine particles, carbon dioxide and the chemical vapours released by newer finishes. Moisture is read as a building problem before it becomes a health problem.
Water quality
What arrives at the tap, what it carries, and what happens to it between the main and the glass. Chlorine, dissolved minerals and plumbing materials are all considered.
Light and sleep
How daylight reaches the rooms you live in, and what light does to the body clock after dark — including the darkness, temperature and quiet of the bedroom.
Materials
Finishes, furniture and fabrics are assessed for what they emit into the air over years, not just how they look on day one.
The electromagnetic environment
Fields from wiring, appliances and wireless devices — measured in sleeping areas, and reduced through layout and design as a precaution. We treat it as prudence, not promise: the evidence on health effects is unsettled, so the homes are built to be quiet anyway.
Sound
Acoustic separation between the rooms that need it — sleep from service, rest from entertainment — because a home that keeps you awake is not a healthy one.
A standalone assessment answers questions about an existing home. The same readings, taken across a whole build and recorded honestly, become something more — which is where our work departs from the discipline alone.
Where we take it
Building biology is one instrument. We play the whole score.
Building biology looks after the health of the building. We look after the life inside it. The eight pillars of the Homey Standard — air, water, sleep, light, materials, acoustics, technology and space — take the concerns building biology names and fold them into the whole way a home is briefed, designed, built and lived in.
And because a claim is only worth what proves it, every pillar is recorded. At handover the home receives its certification: a written document that walks pillar by pillar through the building and states plainly what was implemented against each one — and flags anything that was specified but not carried through, or specified and not needed. It is the record that lets a future owner, a guest or a buyer know exactly what they are standing in, instead of taking someone’s word for it.
That is the part we are proudest of. There is no other certification we know of that documents a home against all eight pillars of lived wellness the way this does — and it exists so that a person with asthma, disturbed sleep or chemical sensitivity can read how a house was actually built before they commit to it.
Go deeper
Mould is a symptom. The building is the cause.
How mould actually starts — condensation, confined spots and stale air — and how a home can be designed so it never does. A prevention-first guide.
How to test the air quality in your home.
What to measure, what healthy ranges look like, and when a home’s air deserves professional instruments rather than a bedside monitor.