Boiler Installation Belfast | Gas Safe Registered | JobDoneNI
Boiler Installation Belfast
Gas Safe Registered Specialists Serving Greater Belfast and the Phoenix Natural Gas Network
Belfast’s Local Boiler Installer
If your boiler has broken down or you’re simply overdue an upgrade, JobDoneNI provides professional gas combi boiler installation across Greater Belfast. We’re fully accredited on the Phoenix Natural Gas network, which means we can legally carry out gas work on Belfast’s mains supply and complete all the required certification on your behalf.
Belfast homes present a specific challenge that catches out many installers: the city has some of the hardest water in Northern Ireland. Without proper protection, limescale builds up inside your new boiler’s heat exchanger and shortens its lifespan significantly. Every JobDoneNI installation in Belfast includes a magnetic system filter and scale inhibitor as standard — not as an optional extra.
We cover all of Greater Belfast, from the north of the city down through South Belfast and out to Lisburn. If you’re in a BT postcode and connected to the Phoenix network, we can help.
Why Belfast Homeowners Choose JobDoneNI
📋 Phoenix Network Accredited
Fully certified to work on the Phoenix Natural Gas network that serves Greater Belfast. No sub-contractors, no shortcuts.
💧 Hard Water Protection Included
Magnetic filter and scale inhibitor fitted on every Belfast installation to guard against limescale damage.
📑 Building Control Notification
Every installation is notified to building control as legally required. We advise you on exactly what’s needed.
💰 Fixed Price Guarantee
No “starting from” quotes. You receive a fixed price after a site survey, and that’s what you pay.
Belfast Boiler Installation Price Guide (2026)
Prices include VAT, A-rated boiler, magnetic filter, scale inhibitor, and system flush.
Service Type
Estimated Cost
Typical Timescale
Gas Combi Swap Like-for-like replacement, A-rated
£1,800 – £2,600
1 day
Combi Upgrade (repositioned) New location, new pipework run
£2,200 – £3,000
1 to 2 days
System Boiler to Combi Conversion Cylinder removal included
£2,400 – £3,200
1 to 2 days
System Upgrade Controls, filter and flush only
£450 – £800
Half day
*Prices are indicative. A fixed quote is provided following a site survey.
What’s Included in Every Belfast Installation
Chemical System Flush: Clears sludge and debris from your radiators before the new boiler goes in, protecting your investment from day one.
Magnetic Filter: Fitted as standard to every Belfast job. Captures magnetite and metal particles before they reach the heat exchanger.
Scale Inhibitor: Essential in Belfast due to hard water. Protects internal components and keeps the boiler running efficiently for longer.
Smart Controls Setup: Professional installation and configuration of Nest, Hive, or Tado thermostats for ErP compliance.
Building Control Notification: Legally required on all boiler installations in Northern Ireland. We’ll walk you through what’s needed for your property.
Gas Safe Certificate: Issued on completion. Required for home sales, remortgages, and rental compliance.
Belfast Areas and Postcodes Covered
We serve homeowners, landlords, and commercial customers across the full Greater Belfast area, including:
🔥 North Belfast (BT14, BT15)
🔥 South Belfast (BT7, BT8, BT9)
🔥 East Belfast (BT4, BT5, BT6)
🔥 West Belfast (BT11, BT12, BT13)
🔥 City Centre (BT1, BT2, BT3)
🔥 Lisburn (BT27, BT28)
🔥 Newtownabbey (BT36, BT37)
🔥 Castlereagh (BT16)
🔥 Holywood (BT18)
🔥 Dundonald (BT16)
🔥 Carryduff (BT8)
🔥 Glengormley (BT36)
Not sure if we cover your street? Call Mark and we’ll confirm straight away.
Belfast Landlords and Letting Agents
Rental properties in Belfast must have a valid Gas Safety Record in place before a tenancy begins. JobDoneNI carries out boiler installations and replacements for private landlords and letting agents across the city, providing all necessary certification on completion.
If you manage multiple properties, speak to us about block pricing. We work with portfolios of all sizes, from single-property landlords in Stranmillis to larger portfolios across South and East Belfast.
“Belfast’s hard water is something every homeowner should know about before they install a new boiler. It’s not optional protection — it’s essential. I include it on every job I do in the city.”
A like-for-like combi swap typically takes one day. If pipework needs repositioning or a hot water cylinder is being removed, allow one to two days. You’ll have heating and hot water restored before we leave.
Belfast has hard water. Over time, limescale builds up inside the heat exchanger and reduces efficiency, eventually causing premature failure. A scale inhibitor is added to the system water during installation to prevent this. We include it on every Belfast job as standard.
Phoenix Natural Gas is the primary distribution network serving Greater Belfast. JobDoneNI is fully accredited to carry out installations on the Phoenix network. If you’re unsure which network serves your property, check your gas bill or call us and we’ll confirm.
Yes. All boiler installations in Northern Ireland must be notified to the relevant council’s building control department. We’ll advise you on the process for your property and what documentation you’ll receive on completion.
Yes. We regularly install in Victorian terraces, maisonettes, and older mid-terrace properties across North, South, East, and West Belfast. Older properties sometimes require additional pipework or flue adjustments, which we’ll account for in your fixed quote.
Yes. We install boilers in rental properties across Belfast and provide all Gas Safety documentation on completion. If you manage a portfolio of properties, contact us to discuss pricing.
Call Mark directly on 07984 433834. We’ll arrange a site survey and provide a fixed price. No vague estimates, no hidden costs.
Get a Fixed-Price Quote in Belfast Today
Don’t wait for a breakdown. Speak to a Gas Safe registered Belfast installer and get a straight answer on price.
