Chichester
01243 774447
Worthing
01903 250139
If you’ve been looking to replace your boiler this year, you’ve probably noticed prices are all over the place. Some quotes sound too good to be true, others seem sky-high, and it’s hard to know who to trust.
One comapany might quote £1,500, another £4,000, so what’s the real cost?
At Here4Heat, we’ve installed hundreds of boilers across Worthing, Chichester, and Littlehampton, so we know what really affects the price, and how to save money without cutting corners.
We were in Chichester last week fitting a new Worcester Bosch Greenstar 4000 for a lovely lady whose old boiler kept cutting out mid-shower, not ideal when you’re halfway through washing your hair!
She’d already had three quotes ranging from £2,200 to £4,800, all claiming to cover the same work. When I checked her setup, it was clear half the “extras” weren’t needed.
The pipework was sound, and the flue just needed a small extension, not a full replacement like she’d been told.
We fitted the new boiler properly, flushed the system, added a magnetic filter, and registered the 10-year warranty. The whole job came in at just over £3,000, and her home’s been warm, quiet, and reliable ever since.
It’s a good reminder that a fair price isn’t always the lowest one, it’s the one that leaves you warm, comfortable, and confident it was done properly.
When people ask how much a boiler costs, the honest answer is, it depends on the setup. But here’s a fair guide for what most homeowners in West Sussex can expect in 2025:
| Type of Installation | Average Cost (inc VAT) | Typical Range |
|---|---|---|
| Combi-to-Combi Replacement | £2,100 | £1,800 – £2,500 |
| System Boiler Replacement | £2,600 | £2,200 – £3,000 |
| Regular Boiler Replacement | £2,800 | £2,400 – £3,200 |
| Full Conversion (e.g. Regular → Combi) | £3,200 | £2,800 – £3,800 |
Those ranges are a good starting point, but every home’s different.
Things like the type of boiler, where it’s fitted, and the condition of your system can all change the price, sometimes by quite a bit.
So if you’ve been wondering why prices can vary so much, like in the examples above, it’s usually down to what’s included in the job.
| What Can Affect the Price | Why It Matters |
|---|---|
| 1. Type of Boiler | A simple combi swap is usually the cheapest. System and heat-only boilers need more parts and labour. |
| 2. Where It’s Fitted | Moving a boiler from the kitchen to the loft or garage always takes more time and materials. |
| 3. Condition of Your System | If your radiators and pipes are full of sludge, we’ll need to clean them before connecting the new boiler. |
| 4. Brand and Warranty | You’ll pay more for a Worcester Bosch or Vaillant, but you get long warranties and reliability that’s hard to beat. |
| 5. Any Extras | Smart thermostats, filters, or upgraded flues can raise the price slightly — but they make the system more efficient in the long run. |
So to summarise, the final cost really depends on those five factors, the type of boiler, where it’s fitted, the condition of your system, the brand you choose, and any extras you add.
Get those right, and you’ll know exactly what you’re paying for, no surprises later.
I completely understand wanting to save money, everyone does. But in heating, the cheapest option often ends up costing the most.
I’ve seen boilers fitted without filters, wired incorrectly, or never flushed through. They look fine on day one but break down within a year or two. By then, the installer’s long gone, and the customer’s paying twice.
When you’re comparing quotes, don’t just look at the number. Check what’s included:
These aren’t “extras”, they’re the difference between a 2-year boiler and a 15-year boiler.
Good work isn’t about rushing; it’s about doing it right the first time. That’s how Here4Heat builds its reputation, one boiler at a time, and it’s why most of our work now comes from recommendations.
If your boiler’s over a ten years old, or it’s breaking down more than it’s behaving, it might be time to think ahead rather than wait for it to fail.
New boilers are up to 94% efficient, that means more heat for your money and fewer repairs to worry about.
It’s not just about saving gas, it’s about knowing your heating will work when you need it most.
And if cost’s a concern, finance options can help spread the payments so you can upgrade without the big upfront hit.
If you’re thinking about upgrading your boiler, I’m happy to pop round for a proper look and give you straightforward, honest advice.
We’ll chat through your options, show you what’s worth keeping, and explain anything that could help improve your system’s efficiency.
My goal’s simple: to help you stay warm, save money, and feel confident about the work before anything starts.
You can book online anytime, or give us a call on Worthing 01903 250139 or Chichester 01243 774447.
