Key takeaways
- ✓ Inspect a previously occupied home thoroughly before moving in — wear and hidden damage depend entirely on how it was maintained.
- ✓ Mould flourishes in damp, dark, humid corners and threatens health as well as appearances — check for it first.
- ✓ Long-closed homes accumulate heavy dust, especially in carpet, and vacuuming removes particles but not the microbial load.
- ✓ Odours from smoking, cooking, pets and bodily fluids get harder to remove with time and don't yield to regular cleaning.
- ✓ Unattended water or fire damage keeps getting worse and more expensive — find out the property's history and have damage treated before you move in.
Before the big move
Moving into a new home is exciting — but unless it's a brand-new build, you're most likely moving into a place previously occupied by other people, with wear and tear that depends entirely on how well it was maintained. Skipping a thorough inspection (and, where needed, proper remediation) can leave you with a mess, unexpected costs and genuine health risks — discovered only after all your belongings are already inside.
Check for the problems below before you move, then have a professional remediation company clean and repair whatever you find. Here are the five most common issues in previously occupied homes.
1. Mould
Mould grows and spreads quickly in damp, dark and humid areas — bathrooms, laundries, wardrobes, behind furniture and inside cupboards. It's more than an eyesore: exposure to mould can cause itchy eyes, a runny nose, sneezing and skin rashes, and it can trigger allergic reactions and asthma attacks. Check every wet area and hidden corner, and if you find growth, arrange professional mould removal before your furniture arrives — moving in on top of a mould problem only spreads it to your belongings.
2. Dust
A home that's been closed up for a long time accumulates serious dust, especially if it's carpeted. Heavy dust aggravates allergies and respiratory problems, and like mould it can set off asthma. A vacuum cleaner will pick up the visible particles, but it won't deal with the microbial load living in old carpet and soft furnishings — that takes a deep professional clean, and in some cases decontamination cleaning.
3. Odour
Unpleasant smells don't fade with time — they set in and get harder to shift. Common culprits in a previously occupied home include indoor smoking, years of cooking in a kitchen without proper ventilation, bodily fluids, and pet urine and faeces that were never properly cleaned. These odours survive ordinary house cleaning because they've soaked into porous materials; professional odour removal neutralises them at the source instead of masking them.
4. Water damage
Your new home may have been through heavy rain or flooding, or quieter events like pipe leaks, burst pipes or sewage problems. Water damage left unattended gets progressively more expensive to repair — it warps structures, feeds mould and weakens materials. Ask about the property's history, look for stains, warping and musty smells, and have any suspected damage inspected. If it's confirmed, professional water damage restoration should happen before you move in.
5. Fire damage
Like water damage, fire damage neglected for even a short period grows into a bigger, costlier problem. Even a small kitchen fire leaves soot, smoke residue and odour that affect the building and the health of the people in it. If the property has any fire history, have it assessed and treated with proper fire damage restoration before moving day.
Don't DIY it
Ignore these issues and you can end up paying far more than you expected — in repairs, replacements and health impacts. But don't attempt home remediation yourself either: mould, contaminated dust, embedded odours and fire or water damage are all jobs where amateur cleaning tends to spread the problem rather than solve it. Professional remediation specialists have the equipment and processes to repair, treat and restore the home properly, so it genuinely feels brand new when you move in.
Need a hand in Sydney or Regional NSW?
One Prime responds 24/7 across Greater Sydney & Regional NSW with comprehensive pre-move home remediation — microbial remediation, mould, odour, water and fire damage all handled by one team. Call 1300 774 631 or get in touch before moving day.
Frequently asked questions
What should I check before moving into a previously occupied home?
Focus on five things: mould in damp and hidden areas, heavy dust build-up (especially in carpet), embedded odours from smoking or pets, signs of water damage such as stains and warping, and any history of fire damage. Find and fix these before your belongings arrive.
Why can't I just clean the house myself before moving in?
Regular cleaning handles surface dirt, but it doesn't remove mould at its source, the microbial load in old carpets, or odours soaked into porous materials — and DIY attempts often spread contamination further. Professional remediation treats the cause, not just the appearance.
How do I know if a house has hidden water damage?
Look for stains on ceilings and walls, warped or lifting flooring, bubbling paint, musty smells and mould in corners. Ask the agent or previous owner about floods, leaks or plumbing incidents, and have anything suspicious professionally inspected before you commit to moving in.
Is old fire damage really a problem if the fire was small?
Yes. Even a minor fire leaves soot and smoke residue that keep corroding surfaces and affecting air quality long after the event. Untreated fire damage also worsens with time, so it should be assessed and professionally restored before you move in.
Sources & further reading
This article is general information, not medical or legal advice. Last reviewed 29 November 2018 by the One Prime Solutions team.