| IF YOU CAN SMELL GAS RIGHT NOW:
1. Do NOT touch any light switches, plug sockets, or electrical items 2. Open windows and doors if you can do so without touching electrical switches 3. Leave the property immediately take everyone with you including pets 4. Call National Gas Emergency: 0800 111 999 (free, 24 hours) 5. Wait outside and do not re-enter until the gas service has cleared the property |
If you can smell gas in your Glasgow home, the only action that matters is getting everyone out immediately and calling the National Gas Emergency Service on 0800 111 999 from outside the property. Do not attempt to find the source of the leak yourself. Do not turn any electrical switches on or off. Do not use your phone inside the property. Gas leaks are rare in UK homes, but when they occur they are a life-safety emergency the gas emergency service will attend as a priority, free of charge, at any time of day or night. This guide covers what happens during and after a gas emergency and when to call a Gas Safe engineer once the property has been cleared.
Immediate Steps In the Right Order
The sequence matters. Do these in order, stopping if any step is not safe to carry out:
| Step | What to Do |
| 1 | Do not touch any electrical switches. A spark from a light switch or socket can ignite gas that has accumulated in the room. |
| 2 | Do not use your mobile phone inside the property. Take it with you when you leave. |
| 3 | Do not light matches, candles, or cigarettes. |
| 4 | If you can do so without touching light switches, open windows and exterior doors to ventilate but do not delay leaving the property to do this. |
| 5 | Turn off the gas at the meter if it is accessible and you can reach it without going further into the property the emergency control valve is usually beside the gas meter, which is often under the stairs, in a cupboard, or outside the property. |
| 6 | Leave the property immediately. Take everyone with you, including pets. |
| 7 | Call 0800 111 999 from outside this is the National Gas Emergency line, operated by Cadent Gas and other network operators. It is free and available 24 hours. |
| 8 | Wait outside at a safe distance. Do not re-enter until the gas emergency service engineer has attended, identified the source, and confirmed it is safe. |
What Happens When the Gas Emergency Service Arrives
The National Gas Emergency Service is separate from your gas supplier and from private heating companies. When you call 0800 111 999, a network engineer is dispatched in most parts of Glasgow, attendance is typically within one to two hours, though this varies by time of day and demand.
When the engineer arrives, they will:
- Use gas detection equipment to confirm whether gas is present in the property and identify the likely source
- Isolate the gas supply to the property at the meter if not already done
- Ventilate the property thoroughly before anyone re-enters
- Identify the appliance or pipework that is the source of the leak
- Cap or isolate the faulty appliance or section of pipe to make the property safe
- Confirm it is safe to re-enter
- Issue paperwork confirming what was found and what action was taken
The gas emergency service engineer makes the property safe they do not carry out permanent repairs to your boiler, gas fire, or internal pipework. Once they have isolated the fault and confirmed the property is safe, the next step is arranging a Gas Safe certified engineer to carry out the repair and restore the gas supply.
After the Gas Emergency Arranging Repairs
Once the gas emergency service has attended and made the property safe, you will need a Gas Safe registered engineer to carry out the repair work before the gas can be restored. The gas emergency service engineer will tell you exactly what has been isolated and why this gives you the information you need to brief the repair engineer.
What happens next depends on what was isolated
| What Was Isolated | What the Repair Engineer Does |
| Boiler isolated suspected boiler fault | Gas Safe engineer inspects the boiler, diagnoses the fault, and either repairs the appliance or recommends replacement if it cannot be safely reinstated |
| Gas fire or cooker isolated | Gas Safe engineer inspects the appliance, confirms whether it is repairable, and if not, decommissions it permanently |
| Internal gas pipe isolated | Gas Safe engineer traces and repairs the leak on the internal pipework, pressure-tests the system, and reinstates the supply |
| Supply isolated at meter | Gas Safe engineer confirms all internal appliances are safe before supply is restored may require safety inspection of all gas appliances |
Under the Gas Safety Installation and Use Regulations 1998, all repair work on gas pipework and appliances following a gas emergency must be carried out by a Gas Safe registered engineer. This is not optional it is UK law. The HSE is the regulatory authority for domestic gas safety.
What Causes Gas Leaks in Glasgow Homes?
Gas leaks in domestic properties are not common, but they do occur. The most frequent causes in Glasgow homes are:
Faulty or ageing boiler components
The gas valve inside a boiler controls the flow of gas to the burner. As boilers age, gas valves can develop small leaks around their seals. This is more common in boilers over 15 years old. A boiler that smells of gas particularly when the boiler is running should be switched off and inspected by a Gas Safe engineer immediately.
Old or corroded gas pipework
In older Glasgow properties particularly Victorian and Edwardian tenements and pre-war houses sections of the internal gas pipework may be original or older installation that has never been updated. Old iron gas pipes corrode from the inside, and the joints between sections can develop slow leaks over time. Any property with original pipework should have its gas installation inspected periodically. Precision Renovators carry out gas safety checks and can assess the condition of internal gas pipework.
Poorly fitted appliances or connections
A gas appliance that has been connected by an unregistered person a gas cooker pushed back onto a flexible hose connection by a homeowner, for example is a potential leak source. Any flexible connector on a gas appliance that is more than a few years old should be inspected. Flexible hoses on gas cookers degrade over time and can develop cracks that release gas.
Accidental damage
Drilling into a wall or floor that contains a gas pipe is a recognised cause of gas leaks. Modern properties have gas pipes routed in predictable positions, but in older Glasgow properties the pipework may not follow standard routing. Before any drilling in walls or floors, use a pipe and cable detector. If a drill or nail breaches a gas pipe, treat it as an immediate gas emergency the steps at the top of this article apply.
Carbon Monoxide A Different but Related Risk
Carbon monoxide (CO) is not the same as a gas leak. A gas leak is unburned gas escaping from pipework or an appliance before combustion. Carbon monoxide is produced when a gas appliance burns gas incompletely for example, a boiler with a blocked flue, a cracked heat exchanger, or insufficient air supply. Carbon monoxide is colourless and odourless you cannot smell it. The only reliable warning is a carbon monoxide alarm.
Every Glasgow home with a gas boiler, gas fire, or any other gas appliance should have a carbon monoxide alarm fitted. If the alarm sounds:
- Leave the property immediately and get into fresh air
- Call 999 carbon monoxide is a medical emergency as well as a gas safety issue
- Do not re-enter until the property has been cleared
- Arrange for a Gas Safe engineer to inspect all gas appliances before restoring the gas supply
Carbon monoxide alarms are inexpensive around £20 at any hardware shop. If your property does not have one, fitting one before next winter is strongly recommended.
How Much Does Gas Leak Repair Cost in Glasgow? (2026)
The gas emergency service attends free of charge there is no cost for the initial emergency response and safe isolation. The costs arise from the repair work carried out afterwards by a Gas Safe engineer:
| Repair Type | Typical Cost (Glasgow 2026) | Notes |
| Gas safety inspection (all appliances) | £80 – £150 | Confirms all appliances safe before reinstatement |
| Internal gas pipe repair (accessible) | £150 – £300 | Depends on pipe location and access |
| Gas valve replacement (boiler) | £200 – £400 | Parts + labour |
| Flexible connector replacement (cooker) | £80 – £150 | Quick fix parts and labour |
| Gas appliance decommission and removal | £80 – £200 | If appliance cannot be safely repaired |
| New boiler installation (if required) | £1,800 – £2,800 | If boiler fault irreparable see boiler guide |
All repair work is quoted in writing before starting. A Gas Safe Installation Certificate is issued on completion of all gas work.
Glasgow-Specific Gas Safety Considerations
Older Glasgow properties
Glasgow has a significant proportion of housing built before 1960 Victorian and Edwardian tenements, 1930s semis, and 1950s council housing. These properties are more likely to have original or older gas installations that have never been fully assessed. The Scottish Government recommends regular gas safety checks for properties in this age bracket. If your property has never had a full gas installation inspection, booking one before a problem occurs is considerably cheaper and less stressful than dealing with an emergency.
Tenement buildings shared gas infrastructure
Some Glasgow tenements have a shared gas meter or shared pipework infrastructure serving multiple flats. If a gas leak affects the communal system rather than an individual flat, the repair responsibility lies with the building factor or owners’ association rather than an individual flat owner. The gas emergency service will identify whether the leak is in shared or individual pipework when they attend.
Landlord obligations
Landlords in Scotland are legally required to have an annual gas safety inspection carried out by a Gas Safe registered engineer and to provide tenants with the resulting Gas Safety Certificate (CP12) within 28 days. If a gas leak occurs in a rental property, the landlord is responsible for arranging the Gas Safe repair work not the tenant. See our boiler servicing and gas safety service for landlord CP12 inspections across Glasgow and South Lanarkshire.
We carry out Gas Safe repair work and gas safety inspections across all of Glasgow and surrounding areas Glasgow city centre, East Kilbride, Paisley, Hamilton, Motherwell, and Rutherglen.
Frequently Asked Questions
What should I do if I smell gas in Glasgow?
Leave the property immediately without touching any electrical switches. Take your mobile phone with you. Call the National Gas Emergency Service on 0800 111 999 from outside. Do not re-enter until the gas service has attended and confirmed it is safe. Do not attempt to find the leak yourself.
Who do I call for a gas leak in Glasgow?
Call 0800 111 999 this is the National Gas Emergency line, free and available 24 hours a day, 7 days a week. This is separate from your gas supplier and from private gas engineers. The network operator sends a qualified engineer to make the property safe. Once the property is cleared, a Gas Safe registered engineer carries out the repair work.
Is the National Gas Emergency Service free?
Yes calling 0800 111 999 and the attendance of the gas emergency service engineer is free of charge. The costs arise from the Gas Safe repair work that follows once the property has been made safe. Your gas supplier does not charge for the emergency network response.
Can I go back into my house after a gas leak?
Only after the gas emergency service engineer has attended, identified the source, isolated the faulty appliance or pipework, ventilated the property, and confirmed it is safe to re-enter. Do not re-enter before receiving this confirmation even if the smell appears to have gone. Gas can accumulate in enclosed spaces and the smell alone is not a reliable indicator of whether it is safe.
Do I need a Gas Safe engineer after a gas leak?
Yes the gas emergency service makes the property safe by isolating the leak, but they do not carry out permanent repairs. A Gas Safe registered engineer must carry out the repair work before the gas supply can be restored. Under the Gas Safety Installation and Use Regulations 1998, all repair work on gas appliances and pipework must be performed by a registered engineer.
What causes gas leaks in Glasgow homes?
The most common causes are: ageing or faulty boiler components (particularly the gas valve), old or corroded internal gas pipework (more common in pre-1960 Glasgow properties), poorly fitted appliance connections such as cracked flexible hoses on gas cookers, and accidental damage from drilling into walls or floors that contain gas pipes.
What is the difference between a gas leak and carbon monoxide?
A gas leak is unburned gas (natural gas or LPG) escaping from pipework or an appliance before it is burned. It has a distinctive smell (the odourant added to natural gas for detection). Carbon monoxide is a byproduct of incomplete combustion produced when a gas appliance burns gas with insufficient air or has a damaged flue. Carbon monoxide has no smell or colour. A CO alarm is the only reliable warning. Both are serious safety issues but require different responses.
Ready to Get Started?
If the gas emergency service has attended your Glasgow property and you need a Gas Safe certified engineer to carry out the repair work, Precision Renovators can help. We carry out emergency heating repair and gas safety work across Glasgow and South Lanarkshire Gas Safe certified, free written quotes, same-day response where possible.
Contact us online or call/WhatsApp 07495 816227 we will confirm availability and get to you as quickly as possible.
