In short
Put the quotes side by side and check they cover the same things: boiler model and output, warranty length and conditions, system clean, filter and inhibitor, controls, flue, pipework and gas supply changes, removal of the old boiler and registration. A lower price that leaves out required work is not a cheaper job.
Why do boiler quotes vary so much?
Because "a new boiler" can mean very different jobs. One quote might be a straight swap in the same place. Another might include a new flue, a system clean, a magnetic filter, smart controls and a bigger gas pipe. Until you line them up item by item, the totals are not comparable.
How much should I expect to pay for a new boiler?
Our new boilers start from £1,750 inc VAT. That is a headline price for a basic like-for-like installation. Real quotes are usually higher, because filters, flushes, thermostats, flue changes and moving the boiler are paid add-ons, and every quote is subject to a site inspection. Our boiler installation cost guide explains what drives the price.
What should every quote tell me?
The boiler
- Make, exact model and output in kW.
- Type: combi, system or regular, and whether that matches what you have now.
- The manufacturer's warranty for that model, and its conditions.
The work
- Removal and disposal of the old boiler, and any cylinder or tanks.
- Flue: reusing the position or a new flue, and any extensions.
- Gas pipe: whether it will be checked and upgraded if it is too small.
- Condensate pipe: route and size, especially if it runs outside.
- Any change of position, and the pipework and making good that involves.
Protecting the system
- System clean or power flush, and which one.
- Magnetic filter and inhibitor. Approved Document L expects the system to be cleaned, flushed and treated with inhibitor when a new boiler is fitted, so make sure every quote includes this.
Controls and paperwork
- The room thermostat or smart control, and TRVs if needed.
- For a combi in England, which of the four energy efficiency measures in Approved Document L is being fitted.
- A carbon monoxide alarm in the boiler room, as Approved Document J expects.
- Building Regulations notification, the commissioning checklist and warranty registration.
What questions should I ask each installer?
- How did you work out the boiler size?
- What is not included, and what could change after you start?
- Is the price subject to anything on the day, and how will you tell me before extra work is done?
- Who will do the work, and can I see their Gas Safe ID card?
- Will you register the warranty, and when is the first service due?
What CombiCert would check
We set out what is included: the boiler model and warranty, flue work, system filter and inhibitor, controls, disposal of the old boiler, and any extras such as a flush or moving the boiler. That makes it easier to compare our figure with another quote on a like-for-like basis. New boilers from £1,750 inc VAT, subject to a site inspection.
When to call a Gas Safe engineer
Only a Gas Safe registered engineer can fit a gas boiler. Check the business on the Gas Safe Register before you accept a quote; our guide on checking an engineer is Gas Safe registered shows how. Be wary of quotes given without anyone looking at your home, because flue, gas supply and condensate issues only show up on a site inspection.
Need a hand? CombiCert in Telford
CombiCert Ltd is a Gas Safe registered (621146) gas and heating company based at The Old School House, Park Lane, Telford TF3 4TG, working across Telford and Shropshire for homes and businesses. We are open Monday to Saturday, 08:00 to 19:45 (closed Sunday).
New boilers from £1,750 inc VAT for a basic like-for-like installation, subject to a site inspection. Most quotes are higher; filters, flushes, thermostats and moving the boiler are paid extras.
See Boiler installation cost guide for Telford, or call or WhatsApp 07393 220694, or email hello@combicert.co.uk.
We cover Telford and nearby, including Wellington, Madeley, Dawley, Oakengates, Shifnal, Newport, Ironbridge and Shrewsbury.
Sources
Frequently asked questions
Should I always choose the lowest boiler quote?
Not unless it covers the same work as the others. A low price can leave out the system clean, filter, controls, flue changes or gas pipe upgrade, which then appear as extras later. Line the quotes up item by item. If one is much cheaper, ask exactly what it does not include before you decide.
How many boiler quotes should I get?
Two or three is usually enough to see a fair range, as long as each installer has looked at your home and quoted for the same type and size of boiler. More quotes are only useful if they are like-for-like. Ask each installer to list what is included in writing.
Is £1,750 the price I will pay for a new boiler?
It is our starting price for a basic like-for-like installation, including VAT. Most quotes are higher, because filters, flushes, thermostats, flue changes and moving the boiler are paid extras. Every quote is subject to a site inspection, and we will list what is included so you can compare fairly.
What paperwork should I get after a new boiler is fitted?
You should receive the completed commissioning checklist, the manufacturer's instructions, warranty registration details and, a few weeks later, a Building Regulations compliance certificate. Keep them together. You will need them for warranty claims, for each annual service and when you sell the house.
This answer is general information, not a substitute for an on-site assessment by a Gas Safe registered engineer. If you smell gas, call 0800 111 999.