How much does a new boiler cost in Hertfordshire?
A like-for-like combi swap in Hertfordshire typically costs £1,900–£2,600 installed — including the boiler, flue, system flush, controls, labour and VAT. A conversion (say, system boiler to combi) runs higher, typically £3,200–£4,300, because pipework and cylinder removal are involved. Anyone quoting far below these ranges is leaving something out of the job or out of the price.
What moves the price
Three things, mostly: the boiler itself (brand, output, warranty length), the complexity of the swap (like-for-like is a day; relocating or converting is more), and what the flush and making-good genuinely involve. Postcode matters less than people think — labour rates across South Herts and North London are broadly similar.
What should always be included
The boiler and flue, a full system flush (not a rinse), controls set up and explained, making good, removal of the old boiler, Gas Safe certification and registration, and a proper handover. If a quote is vague on any of these, ask — 'while we're here' extras are how cheap quotes become expensive jobs.
Fixed price vs estimate
An estimate can move; a fixed price can't. We survey first (free), then the price is fixed in writing — if something genuinely unforeseeable turns up mid-job, we stop and talk to you before anything changes.