If you let a property in Lancashire — flat, HMO, house share, holiday let, even a single room — the law requires an annual Gas Safety Record (still widely called CP12). Skip it and you face fines up to £6,000, possible jail time, and — most seriously — invalidated insurance if something goes wrong.
Here's the no-nonsense 2025 landlord guide, written by Gas Safe engineers who issue dozens of these every month across Burnley, Blackburn, Preston and the wider Lancashire area.
What exactly is a CP12?
CP12 was the old form name. The current legal name is Gas Safety Record (or LGSR — Landlord Gas Safety Record). Most landlords and tenants still call it CP12 so we'll use both terms here.
It's a 1-page certificate confirming that every gas appliance and gas pipework in the let property has been inspected by a Gas Safe registered engineer and is safe to use. It MUST be done every 12 months.
Who's responsible?
The landlord — always. Even if you use a letting agent, the legal responsibility sits with the property owner. The Gas Safety (Installation and Use) Regulations 1998 are unambiguous: landlords must arrange the inspection and provide the record to tenants.
What gets checked?
An engineer's 30–45-minute visit covers:
- Every gas appliance: boiler, gas fire, gas hob, gas oven, gas water heater
- Visual condition of pipework
- Gas pressure (working & standing)
- Flue effectiveness (CO test)
- Safety devices and shut-off valves
- Ventilation (for boilers in cupboards / kitchens)
- Combustion air supply
- Burner pressure and gas rate
If any appliance fails, it gets one of three classifications: Immediately Dangerous (ID) — must be turned off immediately; At Risk (AR) — must be turned off with the consumer's permission; or Not to Current Standards (NCS) — safe to use but outdated and advisable to upgrade.
Cost in Lancashire (2025)
- 1-property landlord CP12 only: £85–£100
- CP12 + full boiler service: £130–£160 (recommended — most warranties require annual servicing anyway)
- Multi-property portfolio (5+ rentals): £75/each — we offer a landlord rate
- HMO with multiple boilers: from £130 (varies by appliance count)
- Out-of-hours / emergency CP12: from £150
When does it need renewing?
- Annually — at the latest 12 months from the last inspection date
- You can renew up to 2 months early without losing time off your renewal date (under the “28-day rule” — gives you flexibility for tenant access)
- If you take on a new tenancy, the current CP12 must still be valid (not expired)
What you must do with the certificate
- Existing tenants: give them a copy within 28 days of the inspection
- New tenants: give them a copy before they move in
- Keep your own copy for at least 2 years (Section 21 / 8 Notice defence)
- Digital copies (emailed, WhatsApp) are legally acceptable — tenant must agree to this format
Penalties for not having a CP12
- Fines: Up to £6,000 per offence under the Gas Safety Regulations
- Imprisonment: Up to 6 months for serious breaches
- Cannot serve a Section 21 (no-fault) eviction in England if you don't have a valid CP12 in date
- Invalidates landlord insurance — if a tenant is injured by a gas appliance you knew was unsafe, your insurer can refuse to pay
- Council enforcement — Hyndburn, Pendle, Burnley, Blackburn-with-Darwen and Lancashire all have active rented-property enforcement teams
Common CP12 fails we see
In order of how often these come up in Lancashire:
- Boiler not serviced in 5+ years — heat exchanger choked, flue gas analysis fails
- Old gas cookers with no safety devices (flame failure devices were mandatory from 2008)
- Blocked flue terminals — especially in old terraces where flues exit into alleyways
- No CO alarm — legally required in any room with a fuel-burning appliance since 2022
- Tenant DIY work — replacement hobs / fires fitted without a Gas Safe engineer
Special cases
HMOs (House in Multiple Occupation)
If you let by-the-room (e.g. student houses in Preston, professional house-shares in Burnley), every gas appliance in common areas AND in individual rooms must be on the CP12. We've seen HMOs in BB10 with 5+ boilers, all needing inclusion. Allow 60–90 minutes per HMO inspection.
Holiday lets / short-term lets
Still need a CP12. Renewed annually. We do these across Clitheroe, Ribble Valley and Pendle for short-let cottages.
Right-to-rent properties (Section 21)
If you might need to serve a Section 21 eviction, you MUST have given the tenant the CP12 at the start of the tenancy AND every renewal since. Without this paper trail your Section 21 will be rejected by the court.
Book a CP12 in Lancashire
We do CP12 inspections same-day or next-day across all 15 areas we cover. Bulk landlord rates available for portfolios of 3+ properties.
Book a CP12 online or call 01282 914 044. We'll send your tenant the certificate by email or post — saves you the paperwork.