Harrow · England
Gas Safety Certificate (CP12) in Harrow
From enquiry to certificate: Gas Safety Certificate (CP12) for landlords in Harrow, handled by professionals holding the registration the law requires, with pricing confirmed before you commit.
Straight answer
Landlords in Harrow must have every gas appliance, flue and the associated pipework checked once a year by a Gas Safe registered engineer. The check produces the Landlord Gas Safety Record — the CP12 — which remains valid for 12 months.
Booking
Booking in three steps
We're building coverage in Harrow through our national onboarding programme, and we won't pretend otherwise with a fake availability calendar. Send the property details and we'll confirm by email whether we can cover the job, and the price, before anything is committed.
Paperwork
Copies, retention and the renewal window
Once the record is issued, three dates matter. Tenant copies: within 28 days for current tenants, before occupation for new ones — and for lets shorter than 28 days, a displayed copy in the property is acceptable. Retention: keep each record at least two years, though holding the full chain is smarter. Renewal: book in the final two months and the MOT-style rule keeps your original expiry date, so early booking never costs you certificate time.
Pricing
What a CP12 costs
What moves the price is mostly appliance count: a flat with a single combi boiler sits at the bottom of the range, while a house with a boiler, hob and gas fire takes longer and costs more. Adding a boiler service to the same visit is usually cheaper than a separate appointment. The figures above are national guidance — your confirmed price comes before anything is booked.
Letting property in Harrow
Letting in Harrow: the practical points
For landlords in Harrow, the practical points are the universal ones: annual check, Gas Safe engineer, tenant copies on time. Keep the record where you can produce it quickly — for your agent, your insurer, or London Borough of Harrow if the property is licensed or ever inspected. Certificates that can't be found cause almost as much trouble as certificates that were never done.
Credentials
Who you're letting in
Gas work is one of the few trades where the register isn't optional: an engineer who isn't Gas Safe registered can't legally sign your record, full stop. We check registration and insurance before confirming any booking, and you can verify any engineer yourself on the public Gas Safe Register — ask to see the ID card, and check the back for the work categories it covers.
The law
Your legal duty, in plain English
Legally, three things are required of you: a check of every appliance and flue at intervals of no more than 12 months, carried out by a Gas Safe registered engineer; a record of that check retained for at least two years; and copies to tenants — within 28 days for existing tenants, before move-in for new ones. The regulations apply UK-wide, and the HSE treats non-compliance as a criminal matter with unlimited fines available.
Landlords must have every gas appliance and flue they provide checked by a Gas Safe registered engineer at least every 12 months, keep the record for two years, give tenants a copy within 28 days of the check, and give new tenants a copy before they move in.
Equivalent annual duty applies in Northern Ireland; engineers must be Gas Safe registered.
Penalties stated are statutory maximums or court-set; London Borough of Harrow is the local housing authority for Harrow.
The inspection
What the engineer actually checks
The inspection covers three layers: the supply (a tightness test from the meter), the appliances (combustion, pressure, safety devices, ventilation — tested with each appliance running), and the flues (visual condition plus confirmation that combustion gases discharge safely outside). An appliance the tenant owns isn't yours to certify, but pipework serving it is, and it stays in scope. The signed record closes the visit.
FAQ
Gas Safety Certificate (CP12) questions, answered
What if an appliance fails the gas safety check?
The engineer records the defect and classifies how dangerous it is. Immediately dangerous appliances may be disconnected with your permission. You must have faults fixed by a Gas Safe engineer before the appliance is used again; the record itself lists the defects found.
Are the gas rules different for an HMO in Harrow?
The annual check itself is the same, but HMO licensing (administered by London Borough of Harrow) usually requires you to provide the current gas safety record with your licence application and on request. Check your licence conditions for any extra record-keeping duties.
How long does a gas safety check take?
Typically around 30 to 60 minutes for a property with a boiler and one or two additional gas appliances. More appliances, or access issues, extend the visit.
How often does a landlord need a gas safety check?
Every 12 months. You can arrange the renewal check any time in the two months before the current record expires and keep the original expiry date — the MOT-style rule — so booking early never shortens your certificate.
What if my tenant refuses access for the gas check?
You must take all reasonable steps: written requests, offering alternative dates, and keeping evidence of each attempt. You may not force entry. A documented paper trail of reasonable attempts is what the HSE expects if access is ultimately refused.
Is a gas safety check the same as a boiler service?
No. The safety check confirms appliances are safe to use; a service is a maintenance clean and inspection of the boiler itself. Many landlords in Harrow book both together because the engineer is already on site, but only the safety check is a legal requirement.
Nearby
Letting elsewhere close by? See: Brent · Hillingdon · Barnet · Watford · all of London
Tell us the postcode and what needs certifying; we'll handle the rest and keep the renewal on our calendar, not just yours. Request pricing for Harrow
Sorting your Gas Safety Certificate (CP12) in Harrow?
Tell us the property and we'll confirm coverage and price by email before anything is committed.