How to Win Commercial Gas Contracts

A commercial gas maintenance contract is fundamentally different from domestic work. Instead of responding to one-off calls, you have recurring, predictable income tied to fixed-term agreements — typically 1–3 years. A single commercial contract can be worth £5,000–£50,000+ per year depending on the portfolio size and complexity.

Commercial clients — offices, restaurants, schools, care homes, hotels, housing associations — need their boilers and gas appliances maintained to legal standards. The Gas Safety (Installation and Use) Regulations 1998 require all commercial premises to have their gas appliances and pipework maintained by a Gas Safe registered engineer. This creates a guaranteed, repeat demand for your services.

The challenge: commercial tendering is more formal than domestic quoting. Clients often require accreditations, insurance levels, and references you may need to acquire before bidding. But for businesses willing to invest in these, the rewards are significant.

Domestic ACS (Accredited Competency Scheme) qualifications give you the right to work on domestic gas appliances. For commercial work, you need additional commercial categories:

• CCCN1 / CIGA1 — Commercial catering equipment (essential for restaurant and hospitality work)
• COMCAT1–5 — Commercial gas installation and maintenance across different pressure categories
• COCN1 — Commercial pipework
• TPCP1/1A — Tightness testing and purging (required for many commercial sites)

For contracts with schools, hospitals, or public buildings, you will also typically need:

• SSIP accreditation (SafeContractor, CHAS, or Constructionline) — most public sector and FM contracts require at least one of these
• Enhanced DBS check if working in schools or care homes
• ISO 9001 certification for larger corporate contracts (optional but competitive)

Acquiring SSIP accreditation (typically £300–£600/year) pays for itself many times over in commercial contract access. Many commercial clients won't even speak to you without it.

Commercial gas contracts typically require higher insurance levels than domestic work:

• Public liability: £5 million minimum, often £10 million for NHS, government, or large commercial contracts
• Employer's liability: £10 million (statutory once you employ anyone)
• Professional indemnity: £1–5 million if you're providing design or consultancy as part of the contract
• Contractor's all-risks or tool cover: covers your equipment on commercial sites

Your insurance broker can usually increase your public liability limit at relatively low additional cost — the step from £2 million to £5 million may add only £100–£200/year. Get it done before pursuing commercial contracts; being unable to meet a client's insurance requirement is a needless barrier to work you would otherwise win.

Commercial gas contracts are awarded through several channels:

• Direct relationships with facilities managers (FMs) — the most effective route. FMs at offices, retail parks, and hotels are often frustrated with their current contractor and receptive to an introduction. Network through LinkedIn, local business groups, and events
• Housing association tender portals — housing associations regularly tender their gas servicing and boiler replacement contracts. Register on Proactis, Delta eSourcing, or their own procurement portals. Contracts are often publicly advertised under OJEU/Find a Tender thresholds
• Local authority frameworks — councils maintain approved contractor lists for property maintenance. Getting on a DPS (Dynamic Purchasing System) can generate sustained work without competitive tendering each time
• FM contractor subcontracting — large facilities management companies (Mitie, Sodexo, Amey) sometimes subcontract to smaller gas engineering firms. Contact their regional procurement teams
• Pub and restaurant chains — hospitality groups with multiple sites often run competitive tender processes for gas maintenance. Approach their estates or facilities management teams directly

When tendering, your submission must address price, qualifications, method statements for how you'd carry out the work, health and safety policies, and references from comparable contracts. A well-structured tender bid demonstrates organisational capability and increases win rates substantially.

Commercial contract pricing differs from domestic quoting. Rather than a single job price, you're providing:

• A fixed annual fee for scheduled preventive maintenance (PPM) visits
• Call-out response times and rates for reactive work
• Parts pricing (often at agreed rates or with a markup cap)
• Emergency response rates and available hours

To price a PPM contract accurately, you need to know the number and type of appliances, the number of visits required per year (usually determined by regulations and appliance manufacturer requirements), your travel time to site, and the expected volume of reactive calls.

Add a margin for risk — commercial sites can have older, problematic plant that generates more reactive calls than anticipated. A 15–20% contingency on your base cost is sensible for a first contract with an unknown client site.

Contracts typically run for 1–3 years with annual break clauses. A 3-year term with a modest annual price increase (2–3% CPI-linked) is worth pursuing — it locks in income and gives you confidence to invest in staff and equipment.