Replacing a boiler is one of the biggest home maintenance decisions you will make, and the first question almost every customer in Telford asks us is a simple one: what is this actually going to cost? This guide sets out realistic 2026 prices for a boiler installation in Telford and across Shropshire, explains what pushes the price up or down, and shows where you can sensibly save without cutting corners on safety.
At CombiCert we install and service boilers throughout Telford and the surrounding towns, so the figures below reflect what local homeowners and landlords are genuinely paying rather than national averages skewed by London pricing.
Boiler installation cost in Telford: 2026 price ranges
Our new boiler installations start from £1,750, fully fitted. That figure covers a straightforward like-for-like combi swap in a typical Telford semi or terrace, where the new boiler goes back in the same position and the existing pipework and flue route are in good order.
As a broad guide for 2026, here is what different jobs tend to cost locally:
- Straight combi-for-combi swap: from £1,750 to around £2,400, depending on the make and output you choose.
- Conventional (heat-only) boiler to combi conversion: roughly £2,600 to £3,600, because the hot water cylinder and feed tanks are removed and pipework is reworked.
- System boiler with unvented cylinder: usually £3,200 to £4,500 for larger homes with two or more bathrooms.
- Boiler relocation (for example garage to kitchen): add roughly £400 to £900 for the extra pipework, flue and making good.
Those ranges include the boiler, the labour, the standard controls, commissioning and manufacturer warranty registration. If you would like a firm figure rather than a range, our new boiler installation service in Telford page explains what is included, and we can quote properly once we have seen the property.
What affects the price of a new boiler?
1. The type of boiler you need
A combi is usually the cheapest option to install because there is no cylinder or tank work. A system boiler costs more up front but suits homes where several people want hot water at the same time. Changing type, rather than replacing like for like, is the single biggest cost jump in most quotes.
2. Output and brand
A 24kW combi for a two-bedroom flat costs noticeably less than a 32kW or 35kW unit for a four-bedroom detached house in Priorslee or Admaston. Premium brands with long warranties sit at the top of the range; solid mid-range units with a good parts network sit lower. We will always talk you through the trade-off rather than simply fitting the most expensive option.
3. Condition of the existing system
Old, sludged radiators and steel pipework can shorten the life of a new boiler, so a power flush or chemical clean is sometimes recommended before commissioning. A magnetic system filter is now effectively standard and is required by most manufacturers to keep the warranty valid.
4. Flue route and gas supply
Long horizontal flue runs, vertical flues through a roof, or an undersized gas supply that needs upgrading from 15mm to 22mm all add labour and materials. These are the items that most often turn an online ‘fixed price’ into something higher on the day, which is why we prefer to check before quoting.
5. Controls and compliance
Current building regulations expect proper heating controls and correct system commissioning. Smart thermostats are an optional extra and typically add £150 to £300, though many customers find the payback in day-to-day control worthwhile.
Combi vs system boiler: which is better value in Telford homes?
Most Telford properties, including the large stock of estate housing around Dawley, Madeley and Hollinswood, are well suited to a combi. You get instant hot water, no cylinder taking up airing cupboard space, and the lowest installation cost.
A system boiler makes more sense if you have two or more bathrooms, a large family, or mains water pressure that struggles to feed a combi at a decent flow rate. Some older properties in the more rural parts of Shropshire also have low incoming pressure, where a stored hot water solution genuinely performs better. The right answer depends on the house, not on what is fashionable.
Grants, finance and reducing the cost
Government-backed help for heating in England continues to focus on insulation and low-carbon heating rather than straight gas boiler replacement. Support such as the ECO scheme is means-tested and generally aimed at households on qualifying benefits with an inefficient existing system; eligibility is assessed by the scheme, not by us. Heat pump grants exist for households moving away from gas altogether, which is a different conversation and a different budget.
For most people, the practical ways to keep the cost sensible are more mundane: replace before the old boiler fails completely so you are not paying for an emergency, book outside the winter rush, choose a well-supported mid-range boiler rather than the flagship, and keep the new boiler in its existing position if the layout allows. If spreading the cost would help, ask us and we will explain the options available at the time of quoting.
Landlords vs homeowners: what changes
If you own the home you live in, the decision is mostly about comfort, efficiency and budget. If you let property in Telford, there are legal duties on top of that.
Landlords must have every gas appliance and flue checked every 12 months by a Gas Safe registered engineer and must give tenants a copy of the record. Our gas safety check service covers the CP12 landlord certificate, and we can carry it out alongside a service visit to save a second appointment. When a boiler is nearing the end of its life, many landlords find that planned replacement is cheaper over a tenancy than repeated call-outs and repairs.
Whichever applies to you, an annual service protects the manufacturer warranty on a new installation. Skipping it is a common and expensive mistake — you can book through our boiler servicing in Telford page.
Why use a local Gas Safe engineer in Telford
Any gas work must be carried out by a Gas Safe registered engineer — that is a legal requirement, not a preference. Always ask to see the engineer’s Gas Safe ID card and check the categories of work listed on the back.
Beyond the legal minimum, using a local firm has practical advantages. We know the housing stock across Telford, from the newer developments at Lawley and Lightmoor to older properties in Wellington, Newport and Shifnal, so quotes are realistic first time. If something needs attention after installation, we are a short drive away rather than a call centre. And because our work is local and repeat-based, we would rather explain a cheaper option than sell you a boiler you do not need.
Frequently asked questions
How much does a new boiler cost in Telford in 2026?
CombiCert installations start from £1,750 fully fitted for a straightforward combi replacement. Most Telford jobs land between £1,750 and £3,000, with conversions and system boiler installations costing more depending on cylinder work and pipework.
How long does a boiler installation take?
A like-for-like combi swap is usually a one-day job. A conversion from a conventional system, or a relocation, typically takes two days because of the extra pipework, cylinder removal and making good.
How much is a CP12 landlord gas safety certificate?
Our CP12 gas safety certificates start from £80. If you combine the safety check with an annual boiler service on the same visit, it works out cheaper than booking the two separately.
Do I need a power flush with a new boiler?
Not always. If the existing system is clean and the radiators heat evenly, a chemical clean and a magnetic filter may be enough. Where there is heavy sludge or cold spots at the bottom of radiators, a power flush protects your new boiler and its warranty.
Is it worth repairing an old boiler instead of replacing it?
If the boiler is under roughly ten years old, parts are available and the repair is modest, repairing usually makes sense. Once repair costs approach a third of a replacement, or parts become obsolete, replacement is normally the better value decision.
Does a new boiler come with a warranty?
Yes. Manufacturer warranties commonly run from five to ten years or more, depending on the brand and model, and are conditional on correct registration and an annual service by a Gas Safe registered engineer.
Get a fixed price for your Telford boiler installation
Every home is a little different, so the most useful thing we can give you is a proper quote rather than a guess. Tell us what you have now, what is going wrong, and what you want from the new system, and we will set out the options and the price clearly.
Call CombiCert on 07393 220 694 or get in touch here for a no-obligation quote across Telford and Shropshire.