Your unit and the building
In a condo, shared walls, stacked plumbing and common storage rooms mean an odor may start in a neighbor's space.
In a condo building, the source of a smell may be inside your unit, such as a trap or a closet, or in the building, such as a pipe stack, a mechanical room or a drain line. Treat both as possible until you can rule one out.
Begin with what you control: fill traps, check the filter, run an isolation test, and read humidity. If the smell stays the same, collect evidence and share it.
Below-grade units can collect odors that rise from nowhere obvious. Building drain lines, storage rooms and shared corridors all have their own moisture and air patterns, and your unit may be at the low end of those paths.
Be specific when you write to a manager. State where you smell it, how strong it is, when it began and what you have already checked. Specific notes are easier to act on and leave a clear record if the smell continues.
Keep any replies in one folder. If a repair is promised, note the date and check the smell afterward so you can report whether it worked.
Building age and layout vary, so avoid assuming a pattern from one neighbor's experience. Compare notes and keep your own observations separate from guesses.
If the smell eases after you act, say so in a short follow-up note. Closing the loop helps the manager prioritize, and it leaves a clean record for anyone who later asks about the unit.
Who to involve
- IfThe smell follows your fixturesThenStart with your own plumber.
- IfThe smell appears in several unitsThenTell the association or manager.
- IfThe smell follows weatherThenAsk about building drainage.
- IfThe smell comes from a shared wallThenNotify in writing with photos.
What to document
Questions for a manager
- Who handles drains and pipes in shared areas?
- Have other owners reported a similar smell?
- Is there a maintenance schedule for pits or pumps?
Common questions
Should I hire a contractor myself?
Check your documents and talk with the manager first.
Do I need a professional before telling the association?
Not necessarily. A factual note with photos and dates is a good start.
Can odors travel between units?
They can, through shared air paths and wall spaces, so a neighbor may smell the same thing.
General information for Hilltop, not a quote or professional advice. In an emergency, call 911.