07956 994429 020 8244 0912 INFO@DHPLUMBING.CO.UK GAS SAFE REGISTERED#180521 AboutServices Service Areas Our WorkReviewsContact 07956 994429020 8244 0912 Request EstimateQuote - Home - Services - Landlord Gas Safety (CP12) Gas Safe #1805214.9★ · 159 Google reviews30+ years local # Landlord Gas Safety Certificates (CP12)in Woolwich & Greenwich Legal, Same-Day, Records Kept for a Decade Statutory annual gas safety inspection carried out by a Gas Safe registered engineer, certificate emailed to tenant and agent within hours, records retained for 10 years, everything you need to stay legally compliant as a landlord in South East London. Request a free estimate Call 07956 994429 Call 020 8244 0912 £75 for one appliance · Digital certificate on the day where possible · Records kept 10 years 30+ yrs Local experience 180521 Gas Safe registered 4.9★ 159 Google reviews £5m Public liability insured 9–9 Office, 7 days a week Overview ## The certificate every SE London landlord needs, done properly A CP12 is not paperwork. It's a legal safety check with legal consequences if it's skipped or falsified. What it isA Landlord Gas Safety Record (informally CP12) is a legally required annual inspection of every gas appliance, flue and section of gas pipework in a rented property. It confirms appliances are safe to use and covers the landlord's duty under the Gas Safety (Installation and Use) Regulations 1998. Who it's forEvery UK landlord letting a property with any gas appliance, boilers, gas fires, cookers, hobs. Applies to private landlords, letting agents, HMOs, Airbnb-style short lets and social landlords equally. When you need itAnnually, and always before a new tenancy begins. New certificate must be issued within 12 months of the previous one, earlier is fine, later is illegal. Why a professional mattersOnly a Gas Safe registered engineer can legally issue a valid CP12. A certificate issued by anyone else is void, leaves the landlord fully liable, and provides no defence in any HSE investigation or insurance claim. What’s at stake ## What happens when a CP12 is skipped or done badly Landlord gas safety enforcement is one of the areas where HSE actively prosecutes, and successfully. ### Unlimited fine and custody Failure to hold a valid CP12 is a criminal offence prosecuted by HSE, carrying an unlimited fine and up to six months' custodial sentence. ### Section 21 becomes unusable Landlords cannot serve a Section 21 no-fault eviction notice without evidence of a valid CP12 having been provided to the tenant. ### Insurance void on any claim A gas-related fire, explosion or CO incident in a property without a valid current CP12 lets the insurer refuse the claim entirely. ### Local authority intervention London boroughs including Greenwich, Bexley and Lewisham inspect proactively; missing CP12s trigger enforcement notices and register the landlord on rogue-landlord databases. Common mistakes we fix - Assuming a boiler service is the same as a CP12, it isn't - Accepting a certificate without checking the engineer's Gas Safe ID - Missing the 12-month renewal window even by a day - Not issuing the certificate to a new tenant on move-in - Losing the copy, landlords must retain for 2 years, tenants must be given a copy within 28 days Our process ## From your first call to the completion certificate. - 1 ### Booking Book by phone, email or through your letting agent portal, appointment within 3 working days across SE London. - 2 ### Access & introduction We coordinate access with the tenant directly, arrive within the arranged slot, ID card visible. - 3 ### Inspection Each gas appliance visually checked and combustion-tested, flue verified, gas tightness test at the meter, ventilation and appliance clearances assessed. - 4 ### Certificate issue Digital CP12 issued promptly via email to landlord, agent and tenant. Printed copy left on-site. - 5 ### Records & renewal Certificate stored on your DHP account for 10 years. Renewal reminder sent 30 days before expiry, you never miss a deadline. Benefits ## What you actually get for the money. ### Legal cover, in writing Every certificate issued under Gas Safe #180521, verifiable and legally defensible. ### Digital issue Digital certificate in your inbox and your tenant's inbox shortly after the inspection. ### Renewal reminders Automatic email 30 days before expiry, no forgotten anniversaries. ### Letting agent friendly We invoice through most SE London letting agent portals and upload directly to Fixflo / Property Inventories where used. ### Records retained 10 years Duplicate certificates available on request, useful for buyer solicitors when you sell. ### Fair per-appliance pricing £75 for one appliance, £15 each additional, no hidden extras. Technical detail ## What a real CP12 inspection covers A CP12 issued in 15 minutes and no combustion analyser is a piece of paper, not a safety check. ### The gas tightness test Manometer connected at the meter, standing pressure recorded, tightness test carried out to BS 6891. A confirmed pass is the foundation of the certificate; failure triggers immediate leak investigation. ### Per-appliance checks Each gas appliance is visually inspected for condition, gas rate is measured against manufacturer specification, combustion is analysed for CO and CO2 ratio, flue integrity is verified and case seals confirmed intact. ### Ventilation and clearances Room ventilation is measured against appliance requirements. Combustible-material clearances checked against manufacturer instructions. ### Flueing and terminations Flue routing inspected for correct rise and support, external terminations checked for proximity to windows and openings, flue joint integrity confirmed. ### The unsafe-situations procedure If any fault is found the industry Gas Industry Unsafe Situations Procedure applies, appliance is labelled Not to Current Standards, At Risk, or Immediately Dangerous, and where necessary disconnected on the spot. A written report and remedial quote follows. ### HMO and multi-appliance properties For HMOs we schedule access in a single visit across all rooms, issue one certificate covering all appliances, and support the annual HMO licence renewal paperwork required by SE London boroughs. Frequently asked ## Questions we hear every week. How much does a CP12 cost?+£75 for a property with one gas appliance (typically the boiler). Each additional appliance (gas hob, oven, fire) is £15. Fixed price, no hidden extras. How often is a CP12 required?+Annually, a new certificate must be issued within 12 months of the previous one. Earlier is fine, later is an offence. Do you issue certificates promptly?+Yes, digital PDF sent to landlord, agent and tenant shortly after the inspection, with printed copy left on-site. Do you work through letting agents?+Yes, we invoice via most SE London letting agent portals, integrate with Fixflo where used, and copy the tenant automatically. What happens if you find a fault?+We follow the Gas Industry Unsafe Situations Procedure, appliance is labelled and, if immediately dangerous, disconnected with gas capped off. You'll receive a written report and a quote for remedial work. How long do I keep the certificate?+Landlords must retain for 2 years minimum; tenants must be issued a copy within 28 days of inspection (or before move-in). We retain records for 10 years. Can I do a CP12 while the tenant is in the property?+Yes, most inspections are completed with the tenant home. Takes 45–90 minutes depending on appliance count. What if my tenant refuses access?+You must be able to demonstrate reasonable steps to gain access. We can provide a written record of attempted visits to support a landlord's compliance defence. Book cp12 / landlord gas ## Ready to get cp12 / landlord gas sorted properly? Speak to Danny directly. Free quote in writing, honest advice, and a fair fixed price. No sales pressure, we’ve been at this for over 30 years for a reason. Call 07956 994429 Call 020 8244 0912Request estimate - Gas Safe registered #180521 - 4.9★ from 159 Google reviews - Office 8am–9pm, 7 days a week - Based in Greenwich · covers all SE London Related services ## Often booked together. See all services → Service ### Gas Safety Engineer Learn more Service ### Boiler Repairs Learn more Service ### Boiler Installation Learn more Service ### Gas Fires & Cookers Learn more Gas Safe registered plumbing, gas & heating engineers with 40 years of local experience across South East London. Gas Safe #180521 Company No. 06064438 Services - Boiler Installation - Boiler Repairs - Power Flushing - Gas Safety Engineer - Landlord Gas Safety (CP12) - Gas Fires & Cookers - Heating Engineer - Central Heating Installation Service Areas - Greenwich · Woolwich - Blackheath · Eltham - Thamesmead · Plumstead - Abbey Wood · Erith - Dartford · Bexley · Sidcup Contact - 07956 99442924/7 Emergency - 020 8244 0912Office landline - info@dhplumbing.co.uk - London - Office: 8am – 9pm, 7 days a week © 2026 DHP London Ltd. All rights reserved. AboutOur WorkReviewsContactPrivacyTerms Call nowGet a quote