Commercial Gas Safety Installation Certificate (CP17)
Installation certificates for every new commercial gas appliance. Legal proof your equipment was fitted safely by a Gas Safe registered engineer.
Officially RegisteredWhat is a CP17 Certificate?
The CP17 certificate is issued for every new commercial gas appliance installation. It records the details of the appliance, the installation, and confirms the work has been carried out safely and in compliance with regulations.
The CP17 certificate is issued for new commercial gas installations.
This certificate confirms that a new gas appliance has been installed correctly and safely in a commercial setting.
Our engineers ensure all installations comply with Gas Safe regulations and manufacturer requirements.
The certificate includes full details of the appliance, gas rate, operating pressures, and safety checks performed.
Why Do You Need a CP17 Certificate?
Insurance companies, building control, and landlords require proof that gas appliances have been correctly installed. The CP17 provides this proof and is a legal requirement for all new commercial gas installations.
📋 Legal Requirement
Under the Gas Safety (Installation and Use) Regulations 1998, a Gas Safe registered engineer must issue a CP17 for every new commercial gas appliance installation.
🔄 How Often?
Issued once when a new appliance is installed. The appliance then requires annual safety checks.
Gas Appliances Covered & Required Qualifications
Each appliance type requires the engineer to hold a specific ACS (Accredited Certification Scheme) qualification on their Gas Safe registration. Our engineers hold all of the qualifications listed below.
| Appliance | Gas Safe Qualification Required |
|---|---|
| Commercial boiler (floor standing) | COCN1 + CIGA1 (Indirect-fired Heating) |
| Commercial boiler (wall hung) | COCN1 + CIGA1 (Indirect-fired Heating) |
| Commercial water heater (storage) | COCN1 + CIGA1 (Indirect-fired Heating) |
| Commercial water heater (instantaneous) | COCN1 + CIGA1 (Indirect-fired Heating) |
| Warm air heater (direct fired) | COCN1 + CDGA1 (Direct-fired Heating) |
| Warm air heater (indirect fired) | COCN1 + CIGA1 (Indirect-fired Heating) |
| Radiant tube heater | COCN1 + CORT1 (Overhead Radiant Heaters) |
| Radiant plaque heater | COCN1 + CORT1 (Overhead Radiant Heaters) |
| Commercial range cooker | CCCN1 + COMCAT1 (Atmospheric Burners / Ranges) |
| Commercial fryer | CCCN1 + COMCAT3 (Deep Fat Fryers) |
| Overhead air curtain heater | COCN1 + CDGA1 (Direct-fired Heating) |
| Cabinet heater | COCN1 + CDGA1 (Direct-fired Heating) |
Who Needs This Certificate?
⚠️ What Happens Without a Valid CP17?
Operating without a valid gas safety certificate puts your business, staff, and customers at serious risk:
- ✗Unlawful installation if no certificate issued
- ✗Insurance policy invalidated
- ✗Appliance warranty voided
- ✗Risk of gas leak, fire, or CO poisoning
CP17 Inspection Checklist
Every item below is verified by our Gas Safe registered engineer during the inspection:
Verify the appliance is suitable for the installation location
Check gas supply pipe is correctly sized
Confirm adequate ventilation for the appliance
Test gas supply pressure at the appliance
Verify correct appliance gas rate
Check flue system is correct type and properly installed
Perform combustion analysis
Test all safety devices and controls
Check condensate disposal (if applicable)
Verify electrical connections are safe
Complete and issue CP17 installation record
Our Gas Safety Inspection Process
Thorough Visual Assessment
Our engineer examines every gas appliance, pipe run, and fitting for wear, corrosion, or non-compliant installation before any testing begins.
Pipework Integrity Testing
We pressurise the gas pipework downstream of the meter and monitor for any drop, confirming no leaks exist within your installation.
Flue & Ventilation Checks
We verify that all flues draw correctly and combustion gases are safely evacuated, protecting your premises from carbon monoxide build-up.
Combustion Performance Analysis
Using calibrated flue-gas analysers, we measure CO, CO₂, and O₂ concentrations to confirm each appliance burns efficiently and within safe limits.
On-the-Spot Certification
Once every check passes, your Gas Safe registered engineer issues the relevant certificate immediately — no waiting, no follow-up visits.
Scope of the Inspection — From the Meter Onwards
Downstream of the Gas Meter Only
By regulation, our engineers inspect and test the gas installation from the outlet of the gas meter onwards. Everything upstream — the service pipe and the meter itself — falls under the gas transporter's responsibility.
Included in the inspection:
- ✓ All internal gas pipework from the meter to each appliance
- ✓ Every connected gas appliance (boilers, cookers, heaters, etc.)
- ✓ Isolation valves and emergency controls
- ✓ Flue systems, ventilation openings, and extraction
- ✓ Operating pressure at each appliance
Not included:
- ✗ The incoming supply pipe before the meter (gas transporter's asset)
- ✗ The gas meter itself (owned by your gas supplier)
- ✗ Any leak or fault on the supply side of the meter
Suspect a gas leak before the meter? Call the National Gas Emergency Service on 0800 111 999 immediately — it is free and available 24/7.
Understanding Inspection Outcomes
Every appliance inspected receives one of three classifications. Knowing what each means helps you respond quickly and keep your business running safely.
Satisfactory
The appliance meets all current standards and is safe to operate. Simply schedule your next annual check and continue trading with confidence.
At Risk (AR)
The appliance falls short of current standards but poses no immediate threat to life. Continued use is at the responsible person's discretion while remedial work is arranged promptly.
- • Ventilation below recommended levels
- • Minor flue joint deterioration
- • Overdue servicing or worn seals
- • Damaged flame supervision device
Immediately Dangerous (ID)
The appliance poses an immediate risk to life. The engineer must disconnect and isolate it on the spot. Reconnection is only permitted after a qualified repair and a fresh safety inspection.
- • Active gas leak detected
- • Blocked or severed flue
- • Dangerously high CO readings
- • Flame failure device bypassed
- • Critical ventilation deficiency
Warning Notices Explained
When a fault is identified, the engineer records it formally. Here is what each notice type means for you and your premises:
At Risk Notice
Issued when an appliance does not fully conform to current standards yet is not life-threatening. The responsible person — landlord, manager, or business owner — is informed and should arrange repairs without delay.
Practical impact: The appliance may remain in use at your own risk while repairs are scheduled. However, if you decline to act, the engineer can escalate the classification to Immediately Dangerous.
Immediately Dangerous Notice
Issued when there is a direct and immediate risk to life. The engineer disconnects and caps the gas supply to the appliance without exception.
Practical impact: The appliance is labelled "DO NOT USE" and cannot be reconnected until a Gas Safe registered engineer completes repairs, confirms safe operation, and issues a new safety record.
CP17 Certificate Pricing
Prices start from £150 + VAT for 1 gas appliance. Additional appliances are charged at £25 + VAT each.
£150
1 appliance
£175
2 appliances
£200
3 appliances
£225
4 appliances
Gas Safe Engineer Services in the UK
Our Gas Safe registered engineers cover the full range of commercial and domestic gas, boiler, heating and plumbing works in the UK.
Commercial Gas Safe Engineer in the UK
Commercial Gas Safe registered engineer in the UK — qualified across COMCAT 1–5, CODNCO1 and CORT1 for catering, plant rooms, pipework and certification.
- Full commercial Gas Safe ticket
- Catering, plant & pipework
- Same-day commercial response
Commercial Gas Safe Plumber in the UK
Commercial Gas Safe plumber in the UK — for restaurants, offices, schools and industrial premises needing combined gas, hot water and plumbing works under one engineer.
- Commercial gas + plumbing in one visit
- Catering, washroom & plant room work
- Out-of-hours scheduling
Local Gas Safe Engineer in the UK
Local Gas Safe registered engineer in the UK — fast response from an engineer who knows your area, for boiler, heating, plumbing and certificate jobs.
- Local engineer, local response times
- Domestic & light-commercial jobs
- Boiler repair, service & install
Gas Safe Boiler Engineer in the UK
Gas Safe boiler engineer in the UK for service, repair and installation of domestic and light-commercial boilers — combi, system and conventional. Worcester, Vaillant, Ideal, Baxi and more.
- Boiler service, repair & install
- Combi, system & conventional boilers
- All major brands supported
Gas Safe Heating Engineer in the UK
Gas Safe registered heating engineer in the UK — central heating installs, power-flushes, radiator replacements, smart controls and full system upgrades for homes and commercial premises.
- Full central heating design & install
- Power-flush & system clean
- Smart thermostats & zone controls
Gas Safe Plumbers in the UK
Gas Safe registered plumbers in the UK for any job that combines gas and water — boilers, hot water cylinders, gas cookers, leak repairs and plumbing emergencies.
- Gas + water specialists
- Leak detection & repair
- Hot water cylinder & unvented work
Gas Safe Installers in the UK
Gas Safe registered installers in the UK for boilers, cookers, hobs, fires and full heating systems — domestic and commercial. Notified to Gas Safe and certified on completion.
- Notified installations (Gas Safe / Building Regs)
- Boiler, cooker, hob & fire installs
- Full system upgrades
Gas Safe London in the UK
Gas Safe registered engineers across London — covering all 32 boroughs and the City. Commercial and domestic gas, boilers, heating and certificates with same-day availability.
- All London boroughs covered
- Same-day London-wide response
- Commercial & domestic engineers
Gas Safe Registered Engineer in the UK
Gas Safe Registered engineer in the UK — fully qualified, ID-carded and listed on the Gas Safe Register for any natural gas or LPG work in your home or business.
- Verified on the Gas Safe Register
- ID card available on request
- Domestic & commercial qualifications
Gas Safe Registered Heating Engineers — Central London in the UK
Gas Safe registered heating engineers covering Central London — Westminster, City, Mayfair, Soho, Marylebone, Kensington and Chelsea. Boilers, heating systems and emergency response.
- Central London priority response
- Heating system design & repair
- Listed building & period property experience
Gas Safe Registered Boiler Services in the UK
Annual boiler service by Gas Safe registered engineers in the UK — combustion check, safety device test and full service report. Keeps warranty valid and bills lower.
- Manufacturer-spec annual service
- Flue gas analysis report
- All boiler brands supported
Commercial Gas Fitter in the UK
Commercial gas fitter in the UK — pipework, meter alterations, appliance connections and full kitchen/plant room fit-outs to IGEM and BS standards.
- Steel, copper & TracPipe pipework
- Meter alterations & upgrades
- Catering & plant room fit-outs
Gas Safe Registered Plumber in the UK
Gas Safe registered plumber in the UK — verified on the Gas Safe Register for any job that combines gas and water: boilers, hot water cylinders, gas cookers, leak repair and unvented systems.
- Verified on the Gas Safe Register
- Combined gas + water specialists
- Hot water, leak & cylinder work
Independent Gas Safe Engineer in the UK
Independent Gas Safe registered engineer in the UK — no call-centres, no franchise mark-ups. Direct booking with the engineer who turns up, for boilers, heating, plumbing and certificates.
- Talk direct to the engineer
- No franchise or call-centre fees
- Honest, fixed-price quotes
LPG Gas Safe Registered Engineer in the UK
LPG Gas Safe registered engineer in the UK — qualified for LPG boilers, cookers, heaters and pipework on properties off the mains gas network, plus mobile catering and leisure use.
- LPG-qualified Gas Safe ticket
- Off-grid homes & rural properties
- Mobile catering & leisure (CP44 / CP2)
Find a Gas Safe Engineer in the UK
Find a Gas Safe registered engineer in the UK — fast match with a verified, ID-carded engineer for boilers, heating, plumbing, gas certificates and emergency callouts.
- Verified on the Gas Safe Register
- Same-day & next-day availability
- Domestic & commercial engineers
CP12 Landlord Gas Safety Certificate in the UK
CP12 landlord gas safety certificate in the UK — the annual gas safety record every rental property needs by law, issued same-day by Gas Safe registered engineers.
- Annual CP12 landlord gas safety record
- All gas appliances & pipework tested
- Certificate emailed same day
Boiler Service & Gas Safety Certificate in the UK
Combined annual boiler service and landlord gas safety certificate in the UK — one Gas Safe registered engineer, one visit, one fixed price, certificate issued same day.
- Full boiler service + CP12 in one visit
- Manufacturer warranty maintained
- One engineer, one fixed price
Air Conditioning Installation in the UK
Air conditioning installation in the UK — split, multi-split, VRF and cassette systems for homes, offices, shops and commercial premises. F-Gas certified, fully insured and building-regs compliant.
- Split, multi-split, VRF & cassette systems
- F-Gas certified engineers
- Free on-site survey & fixed quote
Air Conditioning Installers in the UK
Air conditioning installers in the UK — F-Gas certified engineers installing wall-splits, multi-splits, cassettes, ducted and VRF systems for domestic and commercial clients.
- F-Gas Category I certified installers
- Domestic & commercial installs
- £5m public liability insurance
Air Conditioning Contractors in the UK
Air conditioning contractors in the UK — design, supply, install and maintain commercial cooling systems for offices, retail, hospitality, data rooms and industrial premises. REFCOM F-Gas registered.
- REFCOM F-Gas registered company
- Design & build contracts
- Planned preventive maintenance
Commercial Air Conditioning Installation in the UK
Commercial air conditioning installation in the UK — VRF, VRV, ducted, cassette and split systems for offices, retail, restaurants, hotels, gyms and server rooms. REFCOM F-Gas registered, CDM 2015 compliant.
- VRF / VRV, ducted & cassette systems
- Offices, retail, hospitality & server rooms
- Out-of-hours & phased installs
Commercial Air Conditioning Supply & Design in the UK
Commercial air conditioning equipment supply and system design in the UK — CIBSE heat-load calculations, ductwork design, VRF/VRV and split system specification for offices, retail and hospitality. REFCOM F-Gas registered.
- Equipment supply — all major brands
- CIBSE heat-load & ductwork design
- VRF / VRV & split system specification
CP17 Certificate FAQs
What is a CP17 certificate?
Commercial Gas Safety Installation Certificate (CP17) — issued by a Gas Safe registered commercial engineer after the appliances, pipework and ventilation covered by the certificate have been inspected and tested.
How much does a CP17 certificate cost?
Pricing starts at £150 + VAT for the first appliance, with £25 + VAT for each additional appliance inspected on the same visit. You get a fixed written quote before we attend — call 07427 826446.
How long is a CP17 certificate valid for?
Twelve months from the date of inspection. We send a renewal reminder before it expires so your premises never trades without valid documentation.
How quickly can you issue the certificate?
Same-day and next-day appointments are available seven days a week, and the certificate is issued by email on the day of the inspection once the installation passes.
Ready to Book Your CP17 Certificate?
Secure your certificate today. Our Gas Safe registered engineers are available seven days a week with same-day service as standard.
Starting from £150 + VAT for 1 appliance • Same-day service available