What to Do If You Smell Gas in the House
Last updated: 3 August 2025
Step 1: Do Not Use Any Electrical Switches or Flames
Avoid turning on lights, appliances, or using matches and lighters. A single spark could ignite the gas and cause an explosion.
Step 2: Open Doors and Windows Immediately
Ventilate your home by opening as many windows and doors as possible. This helps to disperse the gas and reduce the risk of ignition.
Step 3: Turn Off the Gas Supply
Locate the gas emergency control valve (usually near your gas meter) and turn it off. Turn the handle 90 degrees so it's perpendicular to the pipe.
Step 4: Evacuate the Property
Leave the building and keep others out until it’s confirmed safe. Don’t use phones or doorbells inside the property — move a safe distance away first.
Step 5: Call the National Gas Emergency Number
Once outside and safe, call 0800 111 999 immediately. This is the National Gas Emergency Service in the UK and operates 24/7.
Step 6: Wait for an Engineer to Arrive
Do not re-enter your home until a Gas Safe engineer has inspected and confirmed it’s safe to return.
How to Prevent Future Gas Leaks
- Have your boiler and gas appliances serviced annually by a Gas Safe registered engineer
- Install a gas leak detector or alarm
- Ensure your gas meter is accessible and you know how to turn it off
- Check for corrosion or damage to gas appliances regularly