Most Quantity Surveyors in Ireland build their early career on the contractor side. It is where the volume of roles has always been, and it teaches the discipline that everything else rests on: measurement, valuations, subcontractor accounts and the habit of knowing exactly where a job is spending its money.
A growing share of the commercial work in Ireland now sits on the developer side, and it is a different job rather than a higher one. The distinction is worth setting out properly, because the two roles share a job title and very little else.
It is not a promotion, it is a different thing to protect
On the contractor side you protect margin on a scheme that has already been defined. The scope exists, the price is agreed, and the commercial task is to deliver that scheme without losing the position you started with. It is demanding work and it is measurable, which is one of the reasons it suits a lot of people very well.
On the developer side you are involved before that definition exists. The decisions you influence are the ones that set what the scheme costs in the first place: what gets built, to what specification, procured which way. Nobody hands you a fixed scope to defend, and the number you are protecting is one you helped create.
When you get involved
The point of entry is the single biggest practical difference. Developer side commercial work starts at appraisal, when the question is still whether a scheme stacks up at all, and it stays involved through design development, procurement strategy and the appointment of the professional team.
That means a meaningful part of the job is influencing decisions before they are made, rather than pricing the consequences afterwards. Commercial people who move across often say the early stage is the part they enjoy most, and also the part they were least prepared for, because it asks for a view rather than a calculation.
The reporting line and the size of the team
Contractor side, you sit in a commercial team. There is a structure above and below you, a Commercial Manager to test your position against, and colleagues doing a version of the same job on other packages. Your work is reviewed by people who understand it in detail.
Developer side, the commercial view is often held by one or two people, and it is reported upwards to a director or a board rather than sideways to other surveyors. That changes the day considerably. Your position is challenged by people who are not commercial specialists, which means part of the role is explaining a commercial reality to an audience that does not live in the numbers.
A pipeline rather than a project
Contractor side commercial work tends to be organised around a project and its final account. Developer side, the horizon is usually wider: several schemes at different stages, cash flow across the pipeline, and funding or reporting cycles that do not line up neatly with any one site.
The consequence is that you carry your own decisions for longer. A call made at design stage on one scheme shows up eighteen months later on site, and you are still there when it does. That is the part experienced commercial people describe as the real adjustment, more than the change of employer or the change of title.
What people underestimate
Three things come up repeatedly. The first is how few colleagues are doing your job, which suits people who are comfortable holding a position alone and is genuinely difficult for those who are not.
The second is the shift from measurement to judgement. The technical work does not disappear, but a smaller proportion of the week is spent producing numbers and a larger proportion is spent deciding what to do about them.
The third is exposure. On the contractor side a commercial error is usually contained within a package. On the developer side, decisions taken early are harder to unwind, and the scheme carries them all the way through.
It does not suit everyone, and it does not need to
Some of the strongest commercial professionals in Ireland have stayed on the contractor side deliberately. They prefer the pace, the structure, the clarity of the target and the depth of the commercial team around them. That is a considered choice rather than a career that stalled.
People also move for reasons that have nothing to do with any of this. Money, location, a better team, a project worth being part of. Those are perfectly good reasons, and any honest account of the market should say so. The useful question, if you are weighing the move, is not which side pays more in a given year. It is which kind of problem you want to be responsible for.
Where the commercial work sits in Ireland right now
The market is splitting rather than slowing. Central Statistics Office figures published in August 2026 show residential building output up 5.5% in the second quarter and civil engineering up 3.1%, while non residential building fell 9.7%. Housing commencements have been running well ahead of last year, with 3,028 homes started in July and 18,974 year to date.
For commercial professionals that pattern matters. Residential and civils activity is where a large share of the current opportunity is being created, and a good deal of that work is led by private developers rather than by main contractors alone. It is one of the reasons the developer side conversation is coming up far more often than it did a year ago.
Necto Selection works with Quantity Surveyors and commercial professionals across Ireland, on both the contractor and the developer side. Contact the team for a straight conversation about where your experience fits.
