What do I do if I smell gas in my home?
If you smell gas: don't operate any electrical switches, open the windows and doors, leave the property, and call Gas Networks Ireland's 24-hour emergency line on 1800 20 50 50 — or 999/112 if you can't get through. Don't go back inside until you're told it's safe to do so.
Smell gas or a sounding CO alarm — act immediately
Don't use electrical switches, open windows and doors, leave the property, and call 1800 20 50 50 (or 999/112 if you can't get through). Treat a sounding CO alarm the same way.
A sounding carbon monoxide alarm is treated the same way: leave the property immediately and call 999 or 112 — CO is odourless, so trust the alarm over how you feel.
Once the immediate danger has passed, the cause still needs to be found and fixed by a current RGI (Registered Gas Installer) before the gas supply is used again — this isn't a job to reconnect yourself even if the smell has gone.
This guidance applies the same way whether the smell is near a hob, a boiler, or you can't tell where it's coming from — the steps don't change.
What to check (once it's safe)
- Has Gas Networks Ireland or an RGI engineer confirmed the property is safe to re-enter
- Is your carbon monoxide alarm working and in date
- Was the actual cause found and fixed by an RGI-registered engineer, not just the smell going away
When to call a pro
Follow the steps above immediately — then have an RGI-registered engineer find and fix the cause.
Sources
- Gas Networks Ireland, gasnetworks.ie/gas-safety/emergency-numbers (verified 1 Oct 2026)
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