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Annual CP12 Landlord Gas Safety Certificate — legally required for all rented properties with gas appliances.
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Certificate expired
Mandatory annual. Set reminder.
Tenant access
Reasonable notice required. Tenant must cooperate.
Failed inspection
Appliance condemned. Repair or remove before re-test.
Multiple properties
Bulk discount providers.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Standard CP12 (1 boiler)Most rentals
£60–£120
CP12 (boiler + 2 appliances)Hob + fire
£80–£150
Multi-property portfolio (per)Bulk discount
£50–£100
Same-day emergency CP12Urgent
£120–£250
Combined CP12 + boiler serviceBest value
£120–£250
HMO CP12 (multiple boilers)Larger property
£150–£400
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Landlord Services explained
Gas Safety Certificate (CP12) — annual legal requirement for landlords of gas-using rental properties. Gas Safe engineer inspection. Expect to pay £60–£150 for UK CP12 gas safety inspection.
What Does the Work Involve?
Gas Safe registered engineer visits. Inspects all gas appliances (boiler, hob, fire). Tests for gas tightness. Flue performance. Carbon monoxide check. Issues CP12 certificate within 28 days. Annual renewal required.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard CP12 (1 boiler) | 60 | 120 | Most rentals |
| CP12 (boiler + 2 appliances) | 80 | 150 | Hob + fire |
| Multi-property portfolio (per) | 50 | 100 | Bulk discount |
| Same-day emergency CP12 | 120 | 250 | Urgent |
| Combined CP12 + boiler service | 120 | 250 | Best value |
| HMO CP12 (multiple boilers) | 150 | 400 | Larger property |
| Repair work if failed (separate) | 100 | 1,500 | If issues found |
How Long Does It Take?
Inspection: 30 minutes-1 hour. Certificate within 28 days.
UK Regulations
Gas Safety (Installation and Use) Regs 1998. Annual inspection mandatory. Tenant copy within 28 days. New tenant before move-in. Fines up to £6,000 + criminal liability for non-compliance.
Common Problems
- Certificate expired: Mandatory annual. Set reminder.
- Tenant access: Reasonable notice required. Tenant must cooperate.
- Failed inspection: Appliance condemned. Repair or remove before re-test.
- Multiple properties: Bulk discount providers.
Frequently Asked Questions
Is CP12 legally required?
Yes — annual for any rental property with gas. Criminal offence to fail to provide.
How long valid?
12 months from inspection date. New tenant requires current certificate.
Tenant must allow access?
Yes — reasonable notice. Court order if obstructive. Cannot fit gas appliance if no access.
What if fails?
Appliance condemned. Cap or remove. Repair and re-inspect. Cannot let with failed gas.
Cost compared to boiler service?
Combined £120-£250 cheapest. CP12 alone £60-£150.
HMO different requirement?
HMO multiple appliances. More thorough. Higher cost.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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