If your plant room is coming up for a boiler replacement, the first question is always the same: what's this going to cost? Commercial boiler pricing in Dublin varies hugely depending on building size, fuel type and access, so this guide breaks down the real numbers and the factors that move them.
No two commercial boiler jobs cost the same, even for buildings of a similar size. The boiler unit itself is often only 40-50% of the total bill once you factor in the rest of the work.
In Dublin specifically, older buildings in the city centre (Georgian offices, converted warehouses, retail units on narrow streets) tend to cost more because of access restrictions, flue routing through multiple floors, and the need to work around tight loading bays or no on-site parking for deliveries.
For a small commercial premises, a single gas boiler in the 50-150kW range typically runs from around €8,000 to €18,000 fully installed, including flue work and basic controls upgrades. This covers things like small retail units, cafes, single-storey offices and similar.
A medium-sized building needing 150-500kW, such as a multi-floor office block, school or mid-size retail unit, usually falls between €18,000 and €45,000. Cascade systems (several smaller boilers working together rather than one large unit) often sit at the upper end of this range but give better redundancy if one unit needs servicing.
Larger industrial or multi-building sites, including those needing bespoke pipework, pressurisation units or BMS integration, can run from €45,000 up to €120,000 or more. These figures are indicative starting points, not fixed quotes; a proper site survey is the only way to get an accurate number for your building.
Decommissioning and safely removing the old boiler is a cost in itself, particularly in older Dublin buildings where asbestos lagging on pipework sometimes needs to be checked and dealt with before any removal work starts.
Downtime matters too. Many Dublin businesses, especially food premises, hotels and offices with tenants, need the changeover done outside trading hours or over a weekend, which affects labour cost. Ask your contractor to price the job both ways so you can weigh the saving against the disruption.
Ask any Dublin contractor for a breakdown, not just a total figure, so you can see what's allowed for the boiler, labour, flue work and controls separately. A written quote should also state whether it's based on a site survey or a desktop estimate from old drawings, since the two can differ significantly once the engineer sees the actual plant room.
For gas installations, check the installer is RGII registered, as this is a legal requirement in Ireland and matters for insurance and building compliance. It's also worth asking whether your project qualifies for any SEAI support available to businesses upgrading heating efficiency, since this can offset part of the cost depending on the scheme rules at the time.
A straightforward single-boiler swap can often be done in 2-4 days, but jobs needing new flues, pipework or scaffolding commonly take 1-2 weeks. Multi-boiler cascade systems or sites needing planning sign-off can take longer.
Repairs are usually cheaper short-term, but once a boiler is over 15 years old or needs frequent call-outs, replacement often works out better value due to efficiency gains and fewer breakdowns. A contractor can compare likely repair costs against replacement over the next few years.
Most straight swaps don't need planning permission, but changes to flue position, external plant or protected structures in Dublin's older districts can require sign-off from the local authority. Your contractor should flag this during the site survey.