Landlord Gas Safety Certificate It is a Legal requirement for landlords to have all the gas appliances in a rented property safety-tested every 12 months by a Gas Safety registered engineer. Gas Safety Certificate (CP12 – 1 Appliance) £55.00 Gas Safety Certificate (CP12 – 2 Appliances) £60.00 Gas Safety Certificate (CP12 – 3+ Appliances) £75.00 All jobs carried out by our engineers  carry a three month guarantee and a  one year guarantee for new installations. 07940765792 (9am-6pm 7 Days a week)