Gas Fitters Insurance for gas engineering firms
Gas fitters insurance for heating and gas engineering firms with teams of engineers, van stock and maintenance contracts with housing providers, landlords and commercial clients. Compare liability cover set for the consequences of a gas escape.
- Liability for gas escapes, fire and carbon monoxide
- Limits matched to housing and commercial contracts
- Van stock, tools and engineers' vans covered
Reviewed October 2026 by the MyBusinessComparison.com editorial team
What is gas fitters insurance?
Gas fitters insurance is cover for firms that install, service and repair gas appliances, pipework and heating systems. Its core is public and products liability for injury or damage from your work, including gas escapes, fires and carbon monoxide, together with employers' liability for your engineers and cover for tools, stock and vans.
A single faulty connection can lead to an explosion or a fatality, so the liability limit matters more here than in most trades. Housing providers, local authorities and commercial clients usually set the limit in their contracts, and insurers look closely at the categories of gas work your engineers are qualified for and how work is checked.
Firms doing installation projects add contract works cover, and those designing heating systems or signing off safety inspections for clients often add professional indemnity.
Gas fitters insurance at a glance
- Suits
- Heating, gas and boiler firms with employed engineers and vans
- Main sections
- Public and products liability with employers' liability
- Often added
- Contract works, tools and van stock, professional indemnity
- Insurers ask for
- Gas Safe registration and the work categories your engineers hold
- Priced on
- Domestic or commercial split, turnover, wage roll, heat work, claims
- Separate cover
- Engineers' vans on a fleet or vehicle policy
What does gas fitters insurance cover?
Gas engineering firms usually combine these sections. Each has a limit and excess, and some carry conditions on heat work and on how installations are tested.
Gas escapes and explosions
Injury and property damage when a joint, appliance or meter connection you worked on leaks and ignites, including damage to neighbouring homes.
Read more about public liability insurance
Carbon monoxide
Claims from occupants harmed by fumes after a flue, ventilation or combustion fault on an appliance you fitted, serviced or inspected.
Products and completed work
Damage arising after you leave site, such as a pressure relief valve or condensate pipe you installed failing and flooding a property.
Read more about products liability insurance
Heat work
Fire caused by brazing, soldering or using a blowlamp on pipework. Most policies apply conditions, such as clearing combustibles and checking the area after work finishes.
Employers' liability
Engineers and apprentices hurt or made ill at work, including burns, back injuries from lifting boilers, and exposure to asbestos in older properties.
Read more about employers' liability insurance
Van stock and stores
Boilers, cylinders, valves, copper and fittings in vans and at your stores, with conditions on overnight security that are worth reading closely.
Tools and test equipment
Flue gas analysers, pressing tools, pipe freezers and other kit, which is costly to replace and attractive to thieves.
Read more about business equipment insurance
Contract works
Plant rooms, boiler replacements and pipework installations still under way, if they are damaged or stolen before sign-off.
Read more about contractors' all risks cover
Other covers heating firms add
- Professional indemnity: heating design, heat loss calculations and safety inspection reports relied on by landlords
- Commercial legal expenses: disputes over maintenance contracts and with former staff
- Group personal accident: lump sums for engineers hurt at work, whatever the cause
- Cyber insurance: scheduling systems and customer data for maintenance contracts
Which firms need gas fitters insurance?
Any established business whose engineers work on gas. The firms that most often buy it are below.
Electrical or cooling work too? See electrical contractors insurance, air conditioning engineers insurance or the trades hub.
- Domestic heating and boiler firms: boiler installs, servicing and breakdown repair for homeowners and landlords
- Social housing maintenance contractors: planned replacements and annual servicing for housing providers, under contracts that set liability limits
- Landlord safety inspection firms: annual gas safety checks for letting agents and landlords, where a missed defect can lead to a serious claim
- Commercial gas engineers: boiler plant, catering equipment and warm air heaters in offices, schools and kitchens
- Mechanical and building services contractors: heating, plumbing and ventilation on new build and refurbishment for main contractors
- LPG and off-grid specialists: bulk tanks, cylinders and pipework in rural homes, caravan parks and farm buildings
- Heat pump and hybrid installers: firms adding low carbon heating alongside gas, with refrigerant and electrical work that may need declaring
- Plumbing firms with gas engineers: general plumbing and heating businesses, often working alongside building contractors
How much does gas fitters insurance cost?
There is no fixed price for a gas engineering firm. Insurers rate the work, not just the size of the business. Underwriters look at the following.
Domestic or commercial
Commercial and industrial gas work, larger pipework and catering installations carry higher rates than domestic boilers.
Liability limit
Higher limits set by housing providers or commercial clients increase the premium, so match the limit to your contracts.
Engineers and apprentices
The pay of engineers and apprentices sets employers' liability, and the ratio of apprentices to qualified staff is often asked about.
Heat work
How often you braze or solder, and the controls you use, affect the fire risk insurers see.
Qualifications and checks
Engineers' registration, categories of work held, and how you audit and sign off work all count.
Claims history
Gas escape, carbon monoxide and water damage claims weigh heavily. Show what changed afterwards.
Limits and exclusions in gas fitters insurance
Claims from gas engineering firms are refused or cut back most often for these reasons.
- Gas work carried out by engineers not registered for that category of work
- Fire from heat work where the policy conditions were not followed
- Putting right your own faulty installation, though the fire or flood it causes may be covered
- Pure financial loss from a wrong inspection report, which is a matter for professional indemnity cover
- Asbestos disturbed knowingly or without the right controls
- Tools and stock taken from an unattended van that did not meet the security conditions
- Industrial process or high pressure gas work that was not declared to the insurer
- Engineers' vans in use on the road, which are insured under a separate vehicle policy
Domestic gas work or commercial gas work: what changes?
Many heating firms move from domestic into commercial work as they grow. Insurers treat the two differently, and the policy needs to follow.
| Feature | Domestic gas work | Commercial gas work |
|---|---|---|
| Typical jobs | Boilers, fires, cookers and pipework in homes | Boiler plant, catering kit and larger pipework |
| Liability limit | Set by homeowners, landlords and housing contracts | Often higher, set by commercial and main contracts |
| Qualifications | Domestic gas categories | Additional non-domestic categories needed |
| Main claim risk | Escapes and carbon monoxide in occupied homes | Plant room fires, explosions and business interruption claims |
| Extra covers | Van stock and tools | Contract works, design cover and higher products limits |
How to compare gas fitters insurance
Gas work is underwritten on detail. Gather this before you ask for quotes.
Split your work
Give the share of turnover from domestic installs, servicing, landlord inspections, commercial work and LPG.
List your engineers
Number of engineers and apprentices, their registration and the categories of work each holds.
Check your contracts
Note the liability limit and any professional indemnity each housing provider or commercial client requires.
Value stock and tools
Typical stock per van, stores value and the cost of replacing tools and test equipment.
Note your claims
List any gas, fire, water or carbon monoxide incidents, how they were settled and what changed.
Quotes for gas engineering firms
Tell us how many engineers you run and the gas work they do, and a broker familiar with heating firms will find terms.
Get a quoteGas fitters insurance FAQs
How much does gas fitters insurance cost?
Your balance of domestic and commercial work, the limit your contracts demand, heat work and your incident record set most of it. A firm doing commercial boiler plant is rated differently from one servicing domestic boilers, even at the same turnover.
Do I need to be Gas Safe registered to get gas fitters insurance?
In practice, yes. Businesses carrying out gas work must be on the Gas Safe Register, and insurers ask for your registration number and the categories each engineer holds. Work outside those categories is usually excluded.
What liability limit do gas engineering firms need?
Set the limit by your contracts. Housing providers, local authorities and commercial clients often require higher limits than domestic customers, and the potential cost of a gas explosion is a good reason not to under-insure.
Does gas fitters insurance cover carbon monoxide claims?
Injury or death caused by carbon monoxide from an appliance you fitted, serviced or inspected is normally covered under public and products liability, subject to the policy terms. Insurers expect proper commissioning, flue checks and records.
Are landlord gas safety inspections covered?
Injury or damage after a missed defect is usually a liability claim. A purely financial claim, such as a landlord losing rent because your report was wrong, may need professional indemnity, so check how your policy treats inspection work.
Is heat work covered?
Yes, usually, but with conditions. Insurers expect combustibles to be cleared or protected, a fire extinguisher at hand, and a check of the area after brazing or soldering finishes. Breaching the conditions can put a fire claim at risk.
Are boilers and stock in my vans covered overnight?
Only if the policy includes stock in vehicles and you meet the security conditions, which may require the van to be locked, alarmed or parked in a secure place. Check the overnight conditions before relying on the cover.
Can apprentices and trainees be covered?
Yes. They are covered under employers' liability, and their work falls under public liability, although insurers usually expect any gas work by a trainee to be supervised and checked by a registered engineer. Tell the broker how many you employ and how they are supervised.
How do I get a gas fitters insurance quote?
Send an enquiry from this page and it reaches a broker who covers gas and heating firms. Expect them to ask for your registration, the engineers and categories you hold, contract limits, van stock values and any incident history.
Ready to compare gas fitters insurance?
Liability, stock and contract cover for gas engineering firms, set to the limits your clients ask for.