How Often Do Short-Term Lets Need a Gas Safety Certificate?
The 12-month rule for holiday lets — and why booking before peak season matters more than the legal floor.
Short answer: gas appliances in rented holiday lets need checking at least every 12 months by a Gas Safe registered engineer. The longer answer is about when you book, not only the legal minimum.
The annual duty, without the fog
Landlords must keep gas appliances safely maintained and get the checks done on time. For most Gwynedd holiday cottages and lodges, that means a yearly CP12 gas safety certificate visit.
“At least every 12 months” is the floor. If your certificate expires on 12 August and your August weekends are fully booked, you needed the engineer in June — not the Tuesday after a guest complaint.
Peak season is the real deadline
Coastal towns and Eryri edges don’t run on a gentle domestic calendar. Pwllheli and Harlech fill for summer. Dolgellau and trail-side lets spike on hiking weekends.
Book annual gas safety renewals with a buffer before your busiest block. If the expiry sits inside peak, pull the visit forward.
Mid-season gaps hurt more than winter ones
A lapsed certificate in February is still a problem. A lapsed certificate between Saturday changeovers in August is a problem with guests in the driveway and an agent on the phone.
Remote owners feel this hardest: you’re not on site to “just let the engineer in tomorrow.” Build the renewal into the same diary as linen turns and deep cleans.
Multi-let landlords: stagger on purpose
Three cottages with three identical August expiries is a self-inflicted queue. Landlord gas safety packages exist to spread dates and keep reporting consistent.
Ask your agent for a simple spreadsheet: property, appliance count, current expiry, who holds keys. That alone prevents half the panic calls we see.
Lodges and cottages: same clock
Timber lodge or stone cottage — the annual clock is the same. The plant room differs; the renewal duty doesn’t. See lodge vs cottage if you want the on-the-day differences.
A rhythm that works
- Note each CP12 expiry in the booking calendar, not only in email.
- Book the visit 6–8 weeks before expiry in peak months; 3–4 weeks may do in quieter periods.
- Update the appliance list when you add a fire, hob, or outdoor point.
- Copy the agent on the new PDF the day it arrives.
Get a renewal window
Not sure when your next check is due? Send the last certificate date when you book a CP12 visit. We’ll suggest a window that respects your changeovers around Caernarfon and the wider county.
