Why cheap boiler installation quotes
often fall apart in London
If you’ve ever stared at two boiler quotes and thought, “How can one be so much cheaper?” — your instinct is probably doing you a favour.
In London especially, very low boiler installation quotes tend to rely on one thing: assumptions. Not always bad intentions — just things that haven’t been checked yet.
Low prices often rely on best-case property conditions that haven’t been verified.
Access, parking, flues, shared services and older installs change the job fast.
A short call can uncover what’s missing before you book and regret it.
This page isn’t a price list.
If you want realistic London cost ranges, we keep that separate on purpose:
realistic new boiler costs in London (full guide)
.
This page is about why “cheap” quotes so often unravel.
If you’re trying to understand what’s really driving the number you’ve been given, these two breakdowns help:
labour vs boiler cost (where the money actually goes)
and
hidden costs people miss when getting a new boiler
.
The uncomfortable truth: cheap quotes assume a best-case home
A low quote usually works on paper because it assumes your home is straightforward: clear access, suitable pipework, clean system water, easy flue route, and nothing unexpected once panels come off.
Sometimes that’s true. Often in London, it isn’t.
Flats, older houses, tight cupboards, shared services, parking restrictions and decades-old installs don’t show up in a five-minute quote form. They show up on the day — and that’s when prices start to move.
Where cheap boiler quotes usually start to unravel
Things are priced before they’re checked
Many low quotes are built around assumptions: that the existing setup is suitable, that no upgrades are needed, and that everything will behave nicely once work begins.
When those assumptions don’t hold — and nobody’s checked them — the job changes. Not because anyone lied, but because reality turned out to be messier than expected.
Protection and testing are assumed, not allowed for
Some quotes quietly assume the system is clean, that protection isn’t required, and that everything will test perfectly first time.
London homes hide complexity
Housing stock across Forest Gate, Stratford, Leyton, Hackney and Central London varies massively. Shared services, altered pipework, and older layouts all add uncertainty.
Access and time are underestimated
Controlled parking zones, restricted hours, and awkward access mean a job that looks quick on paper often isn’t. Time doesn’t disappear — it shows up somewhere.
Call 07727 154746. We’ll explain what’s usually hiding between the lines — no pressure.
Why we’re careful about this conversation
ARA Services Ltd is a small, hands-on team based in Forest Gate, working across East and Central London. We’re Gas Safe registered and we carry out the work ourselves — no call centres, no passing jobs around.
We’re also a 5-star rated local business with over 30 Google reviews. The pattern in those reviews isn’t about being the cheapest — it’s about showing up, explaining things clearly, fixing issues properly, and sticking to what was agreed.
How to protect yourself before booking a “cheap” quote
You don’t need to know boilers. You just need clarity.
- Ask what assumptions the quote is based on
- Ask what’s been checked — and what hasn’t
- Ask how changes are handled if something unexpected appears
- Ask whether testing and compliance are fully included
For context on what a full job normally involves, you can also see what a proper boiler installation actually includes .
What a boiler quote should explain before you say yes
A solid quote doesn’t need jargon — it needs transparency.
You should understand what’s included, what hasn’t been checked yet, and how surprises are handled if they show up mid-job.
If you’re specifically comparing combi quotes, real-world examples help more than headlines: real combi boiler installation examples in London .
If you’re weighing up two quotes and trying to understand the difference, call 07727 154746. We’ll explain what usually causes prices to drift — no sales pressure.
Common questions
Does a cheap quote always mean poor work?
Not always. Issues usually arise when a low quote relies on assumptions that haven’t been checked.
Why do prices change mid-job?
Because something was discovered that wasn’t allowed for. That’s why clarity before booking matters more than the headline number.
Is this more common in London?
Yes. Property age, access, shared services and regulations vary widely across London homes.
How should I compare quotes safely?
Compare what’s included, what’s been checked, and how changes are handled. For cost benchmarks, refer back to the main boiler cost guide.
Want clarity before committing — not a sales pitch?
Call 07727 154746, email info@aragas.co.uk, or use our contact page. A short conversation can save a long headache.
ARA Services Ltd • Durning Hall, Suite 14, Hyat Hub 14, Earlham Grove, London E7 9AB • Hours: Mon–Sat 24 hours; Sunday 6:00am–5:00pm.