Moving into a new home should feel fresh and exciting. But for many homeowners, there’s one unexpected issue: A strange, lingering smell. Whether it’s a brand-new build or an older home, unexplained odors are more common than you might think. And while some smells fade over time, others stick around—or even get worse.
The key is understanding what’s causing the odor and how to eliminate it at the source.
Why Your House Smells (Even If It Looks Clean)
A home can look spotless and still have underlying odor issues. That’s because many smells don’t come from visible dirt—they come from materials, moisture, or contaminants embedded deep within the home. Common sources include:
- Moisture and humidity
- Building materials and off-gassing
- Mold or mildew (even if hidden)
- Previous occupants (pets, smoke, cooking)
- HVAC systems circulating odors
If the smell keeps coming back, it’s a sign the issue isn’t just surface-level.
Why a Brand-New House Smells
It might seem surprising, but new construction homes often have strong or unusual odors. These odors are mostly commonly caused by fresh paint. While some homeowners may think it smells fresh and clean, others find it unnatural and potentially harmful.
3 Common Causes of Odors in New Builds:
- Off-Gassing from Building Materials: New homes are filled with fresh materials—paint, flooring, cabinets, adhesives, and insulation. These can release gases (often called VOCs) that create a “chemical” or “new house” smell. The American Lung Association warns that VOCs can be harmful to your health.
- Trapped Moisture: During construction, moisture can get trapped in wood, drywall, or insulation—especially if the home was built quickly or in humid conditions.
- New HVAC Systems: Dust, debris, or residue in new ductwork can circulate odors throughout the home.
How to Fix Odors in New Homes:
- Increase ventilation (open windows, run fans)
- Use dehumidifiers to control moisture
- Replace HVAC filters and clean ducts
- Allow time for materials to off-gas
If the smell lingers for weeks or months, it may not go away on its own.
“Many of the calls we get are from homeowners who just moved into a new house and quickly realize something doesn’t smell right. They’ve cleaned, aired it out, even tried DIY solutions—but the odor is still there. That’s when they reach out to Pur360. We’re able to identify the source and eliminate it completely, restoring comfort to the home. It’s one of the most rewarding parts of what we do—helping turn a house that doesn’t feel quite right into a place that truly feels like home.”
—Zak Khoshbin of Pur360
Why Older Homes Smell
Older homes come with charm. Sometimes, they also come with years (or decades) of absorbed odors. Most homeowners hope they’ll just get used to the new smell but can’t help noticing it whenever they return home from an extended time away. Is this what our guests smell when they enter our house? Do we have a smelly house?
Common Causes in Older Homes:
- Previous Occupants: Smoke, pets, cooking oils, and everyday living can leave odors trapped in walls, floors, and HVAC systems.
- Hidden Mold or Moisture Issues: Even without visible mold, past leaks or humidity can create musty smells that never fully go away.
- Aging Materials: Carpet, wood, and insulation can break down over time and release odors.
- Poor Ventilation: Older homes often lack modern airflow systems, allowing smells to linger. The crawl space is a common culprit of musty smells.
How to Fix Odors in Older Homes:
- Deep clean carpets, floors, and surfaces
- Repaint walls and ceilings
- Replace old materials (carpet, padding)
- Address moisture issues
Even after cleaning and renovations, odors can remain trapped deep within the home.
Common Odors and What They Mean
Understanding the type of smell can help identify the source:
| Smell | Likely Cause |
| Musty smell | Moisture or hidden mold |
| Chemical smell | Off-gassing from new materials |
| Pet odor | Absorbed into flooring or subfloor |
| Smoke smell | Embedded in walls and HVAC |
| Sewer or rotten smell | Plumbing issues or organic buildup |
DIY Odor Removal vs. Professional Treatment
Many homeowners try to solve odor issues themselves first. There may be some “new home odors” that can simply be wiped away or sealed with an odor-blocking primer.
DIY Methods:
- Cleaning and disinfecting
- Air fresheners or odor absorbers
- Painting or replacing surfaces
- Ventilation and airflow improvements
These methods often mask the odor or treat only the surface, not the source. That’s why so many homeowners end up searching for a better solution after weeks or months of frustration. Homeowners with children, pets or family members with compromised immune systems may not want to take the risk.
I highly recommend Pur360. My wife and I bought a new home and with a 1 month old baby we wanted the air and the surfaces in the home purified to have 100% peace of mind moving in . We picked Pur360 because it’s chemical free and guaranteed . It feels great to be breathing in clean air.
How Pur360 Eliminates Odors at the Source
At Pur360, we take a different approach. Instead of masking odors, we neutralize them at a molecular level so they don’t come back. Our process is 100% natural, safe for families and pets, and is completed in 24 hours or less. Also, it’s non-invasive, meaning you don’t have to demolish any part of your new home.
Our process helps neutralize odors at the source:
- Airborne odor particles
- Odors embedded in walls, floors, and materials
- Hidden sources you can’t reach with cleaning
Pur360’s Preferred Realtor Program
Odor issues don’t just affect homeowners—they can also impact home sales, listings, and first impressions. That’s why Pur360 offers a Preferred Realtor Program designed to help real estate professionals and their clients.
Benefits for Realtors and Homeowners:
- Eliminate odors before listing a home
- Improve buyer experience and confidence
- Avoid price reductions due to odor concerns
- Fast turnaround—perfect for tight closing timelines
Whether you’re a homeowner preparing to sell or a realtor trying to move a listing, odor removal can make a significant difference in how a home is perceived.
When to Call a Professional
If you’ve tried to eliminate the odor and it keeps coming back, it’s time to look deeper.
Signs You Need Professional Help:
- Odor persists after cleaning or renovations
- You can’t identify the source
- The smell is getting stronger over time
- It’s affecting comfort or indoor air quality
Get Rid of That “New House Smell” (or Old One) for Good
A strange smell in your home isn’t something you have to live with. Whether it’s a brand-new build or an older home, the key is finding and eliminating the source. Pur360 provides fast, safe, and effective odor removal that works where other methods fall short.
Schedule your FREE consultation today
We’ll help you figure out what’s causing the smell and get rid of it for good.
