Gas Safety Certificates in
Bethnal Green & East London
Stay legally compliant with annual landlord gas safety inspections. CP12 certificates from £79.99, issued same-day by Gas Safe registered engineers. Multi-property discounts available.
★ CP12 from £79.99 · Gas Safe registered · Same-day certificates · 1,000+ issued
£79.99
From
Same Day
Certificate Issue
12 Months
Validity
Gas Safe
Registered
1,000+
Issued
What Is a Gas Safety Certificate (CP12) & Who Needs One?
A Landlord Gas Safety Certificate — formally known as a CP12 or Landlord Gas Safety Record — is a legal document confirming that all gas appliances, pipework and flues in a rental property have been safety-checked by a Gas Safe registered engineer within the last 12 months.
Under the Gas Safety (Installation and Use) Regulations 1998, every landlord in the UK must provide a valid CP12 to every tenant within 28 days of the inspection (or before they move in for new tenancies). The certificate must be renewed annually. Failure to comply carries unlimited fines and, in cases of injury or death, criminal prosecution under the Health and Safety at Work Act.
MAMOSS issues CP12 certificates across Bethnal Green and East London from £79.99 for a single-appliance property, with same-day digital certificates emailed to you and your tenant. We are Gas Safe registered (engineers carry ID — always ask to see it), carry calibrated equipment for every test, and offer significant discounts to landlords with multiple properties.
- Tightness test on the gas supply pipework
- Standing and working gas pressure check at every appliance
- Burner pressure or gas rate against manufacturer specification
- Combustion analysis (flue gas readings)
- Visual inspection of flue and ventilation
- Safety device testing (flame supervision, ODS)
- Visual check of pipework for damage and corrosion
- Digital CP12 certificate emailed same-day
The Real Cost of an Out-of-Date CP12
Operating a rental property with an expired or missing CP12 is one of the most heavily enforced landlord obligations in the UK. The consequences extend well beyond a fine:
Unlimited Fines
Fines for breaches of the Gas Safety Regulations are unlimited under criminal court sentencing guidelines. Typical fines range from £6,000-£25,000 per breach, with worse cases reaching six figures.
Criminal Prosecution
If a tenant suffers injury or carbon monoxide poisoning in a property without a valid CP12, the landlord can be prosecuted under the Health and Safety at Work Act — potentially leading to a custodial sentence.
Voided Insurance
Landlord insurance policies universally require a current CP12. Any fire, gas or CO incident in a non-compliant property will result in the claim being refused — leaving you personally liable for damage and injury.
Section 21 Blocked
You cannot serve a valid Section 21 (no-fault) eviction notice on a property without an in-date CP12. Eviction proceedings will be ruled invalid by the court.
Tenant Compensation Claims
Tenants who can prove they were not provided with a valid CP12 may claim compensation through the courts — and success rates are high. Some tenants now actively check certificate dates as part of their rights.
Carbon Monoxide Risk
The CP12 inspection includes flue gas analysis — the only reliable way to detect a boiler producing dangerous levels of carbon monoxide. Skipping it is gambling with your tenant's life.
Our Process
What Happens During a MAMOSS CP12 Inspection
Tenant Liaison & Access
We coordinate access directly with your tenant (or letting agent) at a time that works for them. Calibrated equipment and ID are carried — your tenant can verify our Gas Safe registration on the spot.
Tightness Test
We perform a manometer tightness test on the gas supply pipework to confirm there are no leaks anywhere in the property's gas installation. This is the single most important safety check on every CP12.
Appliance-by-Appliance Inspection
Every gas appliance — boiler, hob, fire, water heater — is individually checked: standing pressure, working pressure, burner pressure, flue gas analysis, flame supervision, ventilation adequacy, and visual condition.
Flue & Ventilation Check
We inspect every flue (including concealed flues where access permits), visually check terminations, and verify adequate room ventilation. CO alarms in habitable rooms with gas appliances are checked.
Documentation & Coding
Any defects are coded as Immediately Dangerous (ID), At Risk (AR) or Not to Current Standards (NCS). ID and AR appliances are disconnected with the tenant's consent and you are notified immediately.
Certificate Issued
The CP12 certificate is issued digitally on the day, emailed to you and to the tenant. We diary your renewal date 12 months later and send you a reminder a month in advance.
Why Landlords Choose MAMOSS for Their CP12s
Lowest Compliant Price
From £79.99 for a single-appliance property — among the lowest fully Gas Safe compliant prices in East London. No 'admin fee' or 'callout charge' surprises.
Same-Day Certificate
Digital CP12 emailed within hours of inspection. No waiting weeks for paperwork. Forward straight to your tenant or letting agent.
Tenant Coordination
We deal with the tenant directly to arrange access — saving you the hassle. Polite, professional engineers who respect the tenant's home.
Multi-Property Discounts
Portfolio landlords get discounted rates and coordinated scheduling. Some landlords have us inspect 20+ properties in a single batch — significant savings on the unit price.
Annual Reminder Service
We diary your renewal date and send a reminder a month before expiry — so you never accidentally let a CP12 lapse.
Combined Boiler Service Discount
Add an annual boiler service to the CP12 visit and save £20 on the combined price. Keeps the boiler warranty valid and your CP12 done in one visit.
Gas Safety Certificates in Detail: Pricing, Coverage & Codes
Our CP12 pricing is structured by the number of gas appliances in the property. Single-appliance properties (boiler only) start at £79.99. Two appliances (boiler + gas hob) is £89.99. Three appliances £99.99. Each additional appliance £15. Combined CP12 + annual boiler service is £99 — saving £20 versus booking separately.
Multi-property landlords get tiered discounts: 5+ properties 10% off, 10+ properties 15% off, 20+ properties bespoke quote. We coordinate tenant access across the whole portfolio in a single scheduling exercise and issue all certificates simultaneously for tax-period record-keeping.
Defect coding follows the Gas Industry Unsafe Situations Procedure (GIUSP). Immediately Dangerous (ID) means a real and present risk — the appliance must be disconnected on the spot (with tenant consent — refusal is reported to the Gas Safe Register). At Risk (AR) means a defect that creates risk under foreseeable conditions — disconnect recommended. Not to Current Standards (NCS) is advisory only and does not affect the CP12 outcome.
Common findings in East London properties include: blocked or partially obstructed flue terminals (especially where extensions have been built), inadequate ventilation in modernised kitchens (extractor hoods replacing wall vents), corroded supply pipework in older installations, and missing CO alarms in habitable rooms with gas appliances (a legal requirement since 2022).
We also provide CP12s for HMO properties (per-unit pricing), commercial gas safety inspections (CP15, CP17), catering equipment certificates (CP42) and gas warning notice issuance. Whatever the gas safety paperwork, MAMOSS handles it.
- 1 appliance (boiler only) — £79.99
- 2 appliances (boiler + hob) — £89.99
- 3 appliances — £99.99
- CP12 + annual boiler service — £99 (save £20)
- Multi-property landlord rates — up to 15% off
- HMO per-unit pricing available
- Commercial CP15/CP17 quotes on enquiry
- Same-day digital certificate to landlord and tenant
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