Gas Safe Registered (633735) | Domestic & Commercial Specialists

Boiler Servicing

★ 4.9 on Trustpilot & Google · 120+ reviews

Boiler servicing & Gas Safety Certificates, done properly.

Three service levels from £95+VAT, carried out by a Gas Safe registered engineer. Book your slot online in under two minutes — certificate issued on the day.

"Doing things the right way, not the easy way."
Call 020 8059 2307
CP12 certificate same day All major brands serviced Payment on completion

Three easy ways to book: do it online in two minutes below, ask us a question, or call to book — whatever suits you.

Gas Safe engineer working on a boiler
Most popular
Safety Check Plus
£140exc VAT
Full service + CP12 certificate
Accredited & servicing all major brands
Worcester Bosch Vaillant Baxi Gas Safe registered Mitsubishi
Gas Safe 633735
Registered & fully insured
Same-day CP12
Certificate issued on the visit
Fixed pricing
No hidden costs, ever
Book online 24/7
Pick your own slot instantly
Our service options

Three levels, depending on what your boiler needs.

Every service includes a full Gas Safety inspection and a certificate for your records.

Gas Safety Check
£95exc VAT

A focused safety inspection. Essential for landlords.

Gas tightness test
Flue gas analysis
Operating pressure check
Visual inspection of boiler & pipework
Gas Safety Certificate (CP12) issued
MOST POPULAR
Safety Check Plus
£140exc VAT

What most homeowners choose — the safety check plus a service of core components.

Everything in Gas Safety Check
Clean or replace the burner
Check heat exchanger for debris
Test & verify all safety devices
Check condensate drain
Inspect expansion vessel pressure
Premium Strip-Down
£300exc VAT

The complete service. For boilers 2+ years without a service or where performance has dropped.

Everything in Safety Check Plus
Full strip-down and clean
Replace all accessible seals & gaskets
Descale heat exchanger if required
Test every component individually
Written report on condition & lifespan
Not sure which you need? Most homeowners choose the Safety Check Plus.
Prices exclude VAT, per appliance · No hidden costs — confirmed before any work begins · Call 020 8059 2307 for advice.
Why service your boiler?

The cheapest way to avoid a January breakdown.

Most breakdowns we attend could have been prevented. A blocked condensate trap, corroded burner or failing expansion vessel rarely fails without warning — a service catches these before they leave you cold.

An unserviced boiler also wastes gas. A clean, properly maintained boiler runs at peak efficiency — and that shows on your bill.

Warranty voidedmost manufacturers require an annual service by a Gas Safe engineer. Miss one and you lose cover.
Higher energy billsa boiler losing 5% efficiency on a £1,200 bill costs you £60 extra every year.
Breakdowns at the worst timeboilers fail when working hardest — January, when every plumber is booked solid.
Safety riska faulty boiler can produce carbon monoxide. Every service we do includes a check.
3 in 4
boiler breakdowns are preventable with regular servicing
12 yrs
manufacturer warranty available on qualifying Worcester Bosch & Vaillant installs
50+
UK deaths a year from carbon monoxide — annual checks save lives
£95
starting price for a full gas safety check with CP12 certificate
Why it matters

Three reasons an annual service pays for itself

!
Carbon monoxide safety
A cracked heat exchanger or blocked flue can leak carbon monoxide — an odourless gas linked to around 50 UK deaths a year. Every service includes a flue gas analysis and CO safety check.
Catch faults early
A worn pump, sticking valve or failing expansion vessel rarely fails without warning. We spot and flag wear before it leaves you with no heat or hot water — usually in the depths of winter.
Preventative maintenance
Cleaning the burner, filter and condensate trap keeps efficiency high and your gas bills low — and keeps your manufacturer warranty valid year after year.
Which one do I need?

Gas Safety Check vs a full strip-down service

They're not the same thing. One confirms your boiler is safe; the other keeps it running efficiently. Here's the difference.

A safety inspection
Gas Safety Check

Confirms your boiler and gas appliances are safe to use — without stripping the boiler down. This is what a CP12 certificate covers.

Gas tightness test
Flue gas analysis & CO check
Operating pressure & safety devices
CP12 Gas Safety Certificate issued
Best for: landlords & annual compliance. From £95+VAT.
A hands-on service
Full Boiler Service — strip-down clean

We remove and clean the core components, replace seals and gaskets, descale where needed and test every part — restoring efficiency and extending the boiler's life.

Strip-down & clean of burner and heat exchanger
Replace accessible seals & gaskets
Descale heat exchanger if required
Every component tested individually
Written report on condition & lifespan
Best for: boilers 2+ years unserviced or losing performance. From £300+VAT.

In short: a Gas Safety Check confirms your boiler is safe; a full strip-down service keeps it running efficiently and reliably for years. Landlords legally need at least the safety check — most homeowners benefit from the full service.

Landlords

Gas Safety Certificates (CP12), sorted.

If you rent out a property you're legally required to have a CP12 issued annually by a Gas Safe registered engineer. We issue the certificate on the day of the visit.

Single properties or full portfolios — we batch-schedule certificates and send renewal reminders so you never miss one.

FROM
£95
+VAT per appliance
Certificate issued same day
Gas Safe 633735

What happens on the day

1
Book online
Pick your service level and choose a date that suits you.
2
Confirmation
We confirm your booking, access and parking details ahead of the visit.
3
Service & test
We arrive, do the work, and test everything thoroughly.
4
Certificate issued
Your Gas Safety Certificate is issued on the spot. Payment on completion.
Accredited installers

Real workmanship from Gas Safe engineers

Every visit is carried out by our own Gas Safe registered engineers. As accredited Worcester Bosch & Vaillant installers, we can register manufacturer warranties of up to 12 years on qualifying installations.

Gas Safe engineer servicing a boiler
Servicing, repairs & strip-down cleans
Hands-on work by Gas Safe registered engineers
Engineer explaining boiler controls to a homeowner
Honest advice, explained clearly
We walk you through what your boiler needs — and what it doesn't

Trusted across South London

★★★★★  4.9 average · 120+ reviews on Trustpilot & Google
★★★★★

"Needed an urgent boiler replacement and Ben sorted everything quickly and to a really high standard. All the certification was handled — total peace of mind as a landlord."

James · Clapham
Trustpilot
★★★★★

"My boiler stopped completely. Ben came out fast, diagnosed it and managed the whole process from quote to install. Couldn’t recommend more."

Sarah · Brixton
Google
★★★★★

"Five years using Blue Flame and never less than fully satisfied. Knowledgeable, tidy and always on time."

Michael · Balham
Trustpilot
★★★★★

"Had an F22 fault and no heating. Ben found the leak, returned with the parts and had it working again. Professional and reliable throughout."

Priya · Battersea
Google

Common questions

A standard annual service usually takes around 45–60 minutes, depending on your boiler and how accessible it is.
A service keeps your boiler running safely and efficiently. A CP12 Gas Safety Certificate is a formal check of your gas appliances — a legal requirement for landlords. Every service level we offer includes a CP12.
All major brands including Worcester Bosch, Vaillant, Baxi and Mitsubishi. As accredited Worcester Bosch and Vaillant installers we can register warranties up to 12 years on qualifying installs.
Prices shown exclude VAT and are charged per appliance. Payment is taken on completion, once the work is done and your certificate is issued.
Our boiler servicing starts at £95+VAT for a full Gas Safety Check with CP12 certificate. The most popular Safety Check Plus is £140+VAT, and a complete Premium Strip-Down is £300+VAT. All prices are per appliance and confirmed before any work begins.
Once a year. An annual service keeps your manufacturer warranty valid, maintains efficiency, and catches small faults before they turn into winter breakdowns.
For homeowners it is strongly recommended and usually required to keep your warranty valid. For landlords, an annual CP12 Gas Safety Certificate is a legal requirement under the Gas Safety (Installation and Use) Regulations 1998.
A CP12 confirms each gas appliance is safe to use: a gas tightness test, flue gas analysis, operating pressure check and safety device tests, plus a visual inspection of the boiler and pipework. The certificate is issued on the day of the visit.
Yes. We’re Gas Safe registered (633735) and accredited Worcester Bosch and Vaillant installers, so our servicing keeps manufacturer warranties valid — up to 12 years on qualifying installations.
We cover Balham, Brixton, Clapham, Battersea, Camberwell, Tooting, Streatham, Dulwich, Wandsworth and surrounding SW London postcodes. Not sure if you’re in range? Just ask.
Someone needs to be there to provide access to the boiler and any controls. We confirm access and parking arrangements with you before the visit.

Ready to book?

Book online in two minutes, ask us a question, or call to book — whatever's easiest.

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Gas Safety Check — £95+VAT Safety Check Plus — £140+VAT Premium Strip-Down — £300+VAT
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