How Much Does a Boiler Cost in 2025? Best Ways to Buy & Get Quotes

If your old boiler’s on its last legs, the first thing you probably want to know is: how much does a new one cost in 2025? You’re not alone — it’s the number one question we hear every winter
Here’s what most households can expect to pay in 2025:
A new boiler installation in the UK will usually set you back somewhere between £1,700 and £4,500, depending on the type of boiler, the size of your home, and what’s actually included in the job.
And it’s not just about the price of the boiler itself — it’s also about how you buy it.
Some people go with a big national company, where the engineers are usually direct employees and you can spread the cost monthly with a finance deal.
Others turn to the online boiler companies, but here’s the catch — they don’t employ their own staff. Instead, they send subcontractors out to do the work.
Or maybe you’d rather keep it simple and use a local Gas Safe engineer or small firm. You probably won’t get finance that way, but you can usually pay by credit card for protection or just settle up when the job’s done, no strings attached.
This guide breaks down the average boiler costs in 2025, compares the different ways to get a quote, and explains the pros and cons of each option so you know what’s best for you. We’ll also cover the red flags to watch for — the common mistakes that can leave you paying more than you should or stuck with a poor install.
Typical Boiler Costs in 2025
- Combi boilers (24–30 kW): usually between £1,700 and £2900 installed. Best for flats and small-to-medium homes.
- Combi boilers (30–35 kW): around £2000 to £4500 installed. The most common size for medium family homes.
- System boilers with cylinder: typically £2,100 to £4,000 installed, depending on the size of the property and hot water demand.
- Heat-only/regular boilers with tanks: about £1950 to £3,500 installed, often used in older homes where tanks and pipework are already in place.
These prices are averages for 2025 and cover the boiler plus a standard installation. The total can be higher if extras are needed — like a power flush, smart controls, new radiator valves, or a longer warranty package. Always check what’s included before comparing quotes.
3 Main Ways to Get a Boiler Quote in 2025
When it comes to buying a new boiler, the way you get your quote is just as important as the boiler itself. Here are the three main options most homeowners use today:
National Companies with Employed Engineers (Finance Available)
How it works: Big national boiler firms usually have their own engineers on staff. You fill in an online form, get a quick estimate, and often have the choice to spread the cost monthly with a finance package. In many cases, a proper survey is carried out before the install goes ahead.
Pros:
- Fast process and simple finance options.
- Engineers are direct employees, not subcontractors, which in theory gives better quality control.
- “Big brand” reassurance — if anything goes wrong, there’s usually a corporate warranty and support behind you.
- Often well surveyed before work begins.
Cons:
- Usually more expensive overall.
- Sales calls and upsells are common (filters, controls, cover plans).
- Can feel pushy or overly “salesy.”
- Quality of work still varies between individual engineers, even if they’re employed.
Want to know more? Check what a National Boiler Installer typically offers.
Who it suits best: Homeowners who want a big-brand name and peace of mind if anything comes up, prefer dealing with a company that has employed staff, and need finance options to spread the cost.
Online Boiler Companies (with Subcontractors)
How it works: These companies run almost entirely online with slick websites that promise an instant fixed quote — often with finance included. They don’t employ their own engineers; instead, jobs are handed out to subcontractors in your area. You fill in a short survey about your home, choose a boiler model, and the system spits out a price within minutes. The installer then turns up based only on that information, usually without a full pre-survey.
Pros:
- Very quick and simple process — a quote can be ready in under 5 minutes.
- Prices often look cheaper upfront than national firms.
- Finance is usually available and easy to set up online.
- Straightforward booking and payment through the website.
- Ability to choose your own boiler model, which some homeowners like.
- Fast installation — in many cases the boiler can be fitted the next day.
Cons:
- No proper survey — parts or adjustments may be missing, leading to changes on the day.
- Customers sometimes pick a boiler that’s not suitable for the property. It still heats the house, so they think it’s fine, but it may be oversized, inefficient, or not the best long-term choice.
- Work is carried out by subcontractors, so quality depends on who you get.
- Installers rely heavily on the survey info — if it’s wrong, the job can feel rushed or corners cut.
- Aftercare is handled through the platform, which can feel slower in busy times and less personal.
- No ongoing relationship with the engineer who actually installs your boiler.
Thinking about getting a quote from an online boiler company? – In many cases you can get a boiler fitted the very next day.
Still, it’s a popular choice. Plenty of customers are happy because their boiler gets replaced quickly, the heating works, and the hot water’s back on. From the customer’s side that’s a win — but from the engineer’s side, if the survey is poor, they’re left grumbling, struggling to make it work, or sometimes even walking away without starting the job.
Who it suits best: People who want a fast, convenient install, aren’t necessarily looking for a personal experience (for example, landlords or homeowners living elsewhere), don’t mind using subcontractors, and are happy to book online if it means quick quotes and even next-day fitting.
Local Independent Gas Safe Installers
How it works: This is the old-school way. You contact a local Gas Safe engineer or small firm, and they’ll usually come out to do a proper survey or at least ask detailed questions before quoting. Finance isn’t always available, but most will let you pay by credit card (for added protection and to help spread the cost) or simply pay on completion once the work is done.
Pros:
- You can pick your own engineer or firm — not just whoever turns up.
- Proper surveys — the engineer sees the job before starting, so everything is tailored to your needs.
- Personal service — you deal directly with the person fitting your boiler.
- Jobs usually aren’t rushed to hit sales targets or fixed-price quotas.
- Installs are often neater, with more care taken on pipework and details.
- Prices can often be more competitive than those of national or online firms.
Cons:
- Slower process — you might wait a few days for a visit and written quote.
- Finance is usually not available.
- Smaller teams can be fully booked in the winter rush, so waiting times may be longer.
- If something goes wrong, you’re relying on the trust and insurance cover of the engineer or firm you chose.
Prefer to keep it personal? Get a local fixed quote — you’ll see an online price first, then we confirm it with a proper survey before starting the job
For many people, this is the preferred route. You don’t just get an online price — you get an engineer visit, someone accountable who surveys the job properly, talks you through the options, and answers your questions. They take the time to do the install right and are still there if you need them later.
Top Tip: Do your research. Look at job photos, check reviews (bearing in mind some can be fake), and pay attention to social media posts or videos where you can actually see the quality of their work.
Who it suits best: Homeowners who want a personal service, prefer to deal directly with the engineer fitting the boiler, value quality workmanship and accountability, and don’t mind waiting a little longer if it means the job is done properly and with more care.
Boiler Types Explained (Which One Do You Need?)
Choosing the right boiler isn’t just about price — it’s about matching the system to your home and hot-water needs. Here are the three main types:
Combi Boilers
Best for flats and smaller homes. A combi (combination) boiler heats water directly from the mains, so there’s no need for a separate cylinder or tanks. You get instant hot water on demand, and they’re usually the cheapest and quickest installs.
System Boilers with a Cylinder
A good choice for larger homes or families with more than one or two bathrooms. The boiler heats water stored in a separate hot-water cylinder, which means multiple showers or taps can run at the same time without pressure dropping.
Regular (Heat-Only) Boilers
Still common in older homes with tanks in the loft. These work with a hot-water cylinder and cold-water storage tank. They’re often the easiest swap if you already have this setup in place, but they take up more space.
Want to dig deeper into the differences? Check out our guide: [Combi vs Hot Water Cylinder]
What to Look For in a Proper Install
A boiler is only as good as the installation. When comparing quotes, check that the following are included:
- Magnetic filter + system flush (BS 7593): A proper flush and filter protect your boiler from sludge and debris, keeping it efficient and under warranty.
- Thermostat (smart or load-compensating): A good control setup improves efficiency, helps reduce gas bills, and ensures compliance with current regulations.
- Warranty length (10–12 years): Always ask about the manufacturer’s warranty. A long warranty gives peace of mind and shows the install has been done to standard.
- Benchmark Paperwork (Warranty certificate and building certificate)
For a more detailed breakdown, check out our full guide: Boiler Installation Guide Leeds 2025
Red Flags to Avoid
Not all boiler installs are equal. If you spot any of the following when comparing quotes or after the job’s done, treat them as warning signs:
- Price that looks too cheap: Often means corners are being cut, such as skipping a flush or leaving out a magnetic filter.
- Short warranty (2 years or less): A modern boiler should come with 7–12 years’ cover if installed to standard.
- Messy pipework or rushed workmanship: Quality installs take care and attention — if it looks bodged, it probably is.
- No certification paperwork: Always make sure you receive the Benchmark logbook and Gas Safe paperwork.
Want to know more? Check out our full guide: 7 Signs of a Poor Installation
Final Thoughts — Best Way to Buy in 2025
Each option has its place:
- Nationals: best for homeowners who want a big-brand name, peace of mind, and easy finance options.
- Online platforms: suit people who want speed, convenience, and don’t mind subcontractors — ideal for landlords or those living elsewhere.
- Local independents: perfect for homeowners who want personal service, accountability, and a job done with extra care.
Need a boiler in Leeds or West Yorkshire? Get a fixed quote from A-Tech Installs today.
Further Reading
Want to dive deeper? Check out these helpful guides:
- Compare 30 kW Boilers — See which 30 kW combi models offer the best flow rates, modulation, and efficiency in 2025.
- Signs of a Poor Boiler Install — Spot the common shortcuts and mistakes that could cost you down the line.
- Central Heating Flush Explained: Power Flush, Chemical Flush & Magna Cleanse Compared] — Find out when a system flush is required and why it matters for your boiler warranty.
- Combi vs Hot Water Cylinder — Learn the key differences so you can decide which system suits your home best.
Closing Thoughts
At the end of the day, a boiler is a big investment. However you choose to buy — national, online, or local — make sure the job’s done properly with a good flush, filter, and warranty.
If you’re in Leeds or West Yorkshire, we’re here to help with no-nonsense, local service.
Try our online boiler quote or be in touch.
Attila Boruzs
A Tech Installs Ltd
Gas Safe Registered Boiler Installer — Leeds & West Yorkshire