Boiler Installation Lisburn and Castlereagh | Gas Safe Registered | JobDoneNI
Boiler Installation Lisburn and Castlereagh
Gas Safe Registered Specialists Serving Lisburn, Castlereagh, and Surrounding Areas
Your Local Boiler Installer in Lisburn and Castlereagh
JobDoneNI provides professional gas combi boiler installation across Lisburn and Castlereagh, covering everything from straightforward like-for-like swaps to full system conversions. We’re accredited on the Phoenix Natural Gas network, which supplies mains gas to Lisburn city and the surrounding areas, and we handle all required certification as part of every job.
Like Belfast, Lisburn and Castlereagh sit in one of Northern Ireland’s harder water areas. Limescale is a genuine threat to a new boiler’s heat exchanger, particularly in properties that haven’t had system protection before. Every JobDoneNI installation in this area includes a magnetic filter and scale inhibitor as standard to protect your investment from day one.
Why Homeowners in Lisburn and Castlereagh Choose JobDoneNI
📋 Phoenix Network Accredited
Fully certified to carry out gas installations on the Phoenix Natural Gas network serving Lisburn and Castlereagh.
💧 Hard Water Protection Included
Magnetic filter and scale inhibitor fitted on every installation in this area. Not an optional extra.
🔧 No Sub-Contractors
Every job is carried out directly by our own Gas Safe registered engineers. No outsourcing, no surprises.
💰 Fixed Price Guarantee
You receive a fixed quote after a site survey. That’s the price you pay, with nothing added on afterwards.
Lisburn and Castlereagh 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.
Towns, Villages, and Postcodes Covered
We cover the full Lisburn and Castlereagh City Council area, including:
🔥 Lisburn City (BT27, BT28)
🔥 Castlereagh (BT6, BT8, BT16)
🔥 Carryduff (BT8)
🔥 Dunmurry (BT17)
🔥 Dromore (BT25)
🔥 Hillsborough (BT26)
🔥 Moira (BT67)
🔥 Dundonald (BT16)
Not sure if we cover your area? Call Mark and we’ll confirm straight away.
What’s Included in Every Installation
Chemical System Flush: Clears sludge and debris from your radiators before the new boiler goes in.
Magnetic Filter: Captures magnetite and metal particles to protect your new heat exchanger.
Scale Inhibitor: Essential in this area due to hard water. Prevents limescale build-up inside the boiler.
Smart Controls Setup: Nest, Hive, or Tado installed and configured for ErP compliance.
Gas Safe Certificate: Issued on completion. Required for home sales, remortgages, and rental compliance.
Building Control Notification: Legally required on all boiler installations in Northern Ireland. We’ll advise you on what’s needed for your property.
“Lisburn and Castlereagh are areas I know well. The properties here range from newer estates to older semis, and each one needs a proper site survey before you can quote accurately. That’s exactly how we work.”
Boiler Installation Lisburn and Castlereagh — FAQs
Yes. Lisburn city and many of the surrounding towns are served by the Phoenix Natural Gas network. JobDoneNI is fully accredited to carry out installations on the Phoenix network. If you’re unsure whether your property is connected, check your gas bill or give us a call.
A straightforward combi swap typically takes one day. Jobs involving pipework repositioning or cylinder removal generally take one to two days. You’ll have heating and hot water before we leave.
Yes. Lisburn and Castlereagh fall within a hard water area. Without a scale inhibitor, limescale will gradually build up inside your boiler’s heat exchanger, reducing efficiency and shortening its working life. We include one as standard on every installation in this area.
Yes. We cover the wider Lisburn and Castlereagh council area including Carryduff, Hillsborough, Moira, Dromore, Dunmurry, and Dundonald. If you’re unsure whether we reach your address, just call and we’ll confirm.
Call Mark directly on 07984 433834. We’ll arrange a site survey and give you a fixed price. No vague estimates, no hidden costs.
Get a Fixed-Price Quote in Lisburn or Castlereagh Today
Don’t wait for a breakdown. Speak to a Gas Safe registered local installer and get a straight answer on price.
