Why does my kitchen sink smell?

What it could mean

Understand the symptoms.

Odours can come from organic deposits, a dry or faulty trap, or a drainage problem.

What to do next

Note whether the smell is constant or follows appliance use. Avoid combining drain chemicals.

When a plumber should assess it

If the fault continues, is affecting other fixtures, risks damage or cannot be identified safely, arrange a professional assessment. Similar symptoms can have different causes, so an inspection is needed before confirming a repair.

What to tell us

• Your suburb and the affected fixture or system
• Whether the problem is continuous or intermittent
• Any noises, visible leaks, odours or recent changes
• Whether it involves a single fixture or several

This article is general guidance. Do not attempt electrical, gas, pressurised, confined-space or unsafe drainage work.

Make the next conversation useful

Questions worth asking about why does my kitchen sink smell?.

• Which observations would help distinguish the likely causes?
• What can be inspected safely without disturbing concealed plumbing?
• What work, access and materials might be needed before a price can be confirmed?
• What findings would change the repair or replacement recommendation?

Note whether the smell is constant or follows appliance use. Avoid combining drain chemicals.

Related homeowner questions

• Why is my shower drain slow? — Hair and soap deposits can restrict an accessible shower waste, but slow drainage may also point to a larger branch issue.
• Why does my sink gurgle? — Gurgling can occur when air moves through drainage as wastewater flows around a restriction or the venting is affected.

For work across Sydney, check our service-area information and the booking and pricing FAQs. A written quotation should clarify the scope before work proceeds.