Appointing individual trades yourself can save the main contractor's margin, typically 10 to 20 per cent. In exchange you take on sequencing, coordination, quality control, permits, insurance and the risk when two trades disagree. In Dubai there is an additional obstacle: most communities require a single registered contractor with insurance and a deposit before allowing works at all.
What you actually save
The main contractor's overhead and profit, plus the cost of their supervision. On a residential renovation that is typically 10 to 20 per cent of the total.
It is a real saving, and for a small single-trade job — a repaint, a flooring replacement — managing it yourself is often perfectly sensible.
What you take on
Sequencing, which is the hard part. Trades must arrive in the right order and each must have finished properly before the next starts. Get it wrong and you pay twice.
Coordination between trades. Quality control, which means knowing what good looks like. Permits and NOCs, which someone has to obtain. Insurance. Waste removal. And responsibility for the gap when the tiler blames the screeder.
The Dubai-specific obstacle
Most communities require a single registered contractor with a trade licence, insurance and a refundable deposit before permitting works. Managing eight individual trades through that process ranges from difficult to impossible depending on the community.
This is frequently what decides the question rather than the economics.
Where the line sits
Single-trade work with no permit implications: manage it yourself. Anything multi-trade, anything needing a permit, anything in a gated community with an approved-contractor register: appoint a main contractor.
The margin you save on a complex project is usually less than the cost of one sequencing mistake.
What you are actually choosing between
One contract with a main contractor who coordinates everyone, or several contracts with individual trades that you coordinate yourself. The money saved in the second arrangement is the main contractor's preliminaries and margin. The cost is that the coordination becomes your job.
That trade is worth making in some situations and not in others, and the deciding factor is almost always the number of interfaces rather than the size of the budget.
What the main contractor is actually for
Sequence. A renovation is not a series of independent tasks; it is a chain where each trade depends on the one before. First fix before plastering, plastering before second fix, screed curing before tiling, joinery measured after walls are true.
They also carry single-point responsibility. When the tiling fails because the screed was wrong, there is one party accountable rather than two trades pointing at each other. And they hold the programme, the site, the waste, the protection and the approvals.
When managing trades yourself works
Single-trade work with few interfaces. A repaint. A floor replacement. A new kitchen in an existing opening with no services alteration. One trade, one dependency, little to coordinate.
It also works where you have genuine time and the inclination. Managing trades is not difficult; it is relentless, and it requires being available during the working day to make decisions that cannot wait.
When it does not
Anything involving services, structure, approvals or more than about three trades. The point at which coordination becomes the project rather than an overhead is earlier than most people expect.
The failure mode is predictable: a trade arrives, finds the previous one has not finished or has done something that does not suit, and leaves. Rebooking costs a week. Three of those and the saving has gone.
| Situation | Usually better |
|---|---|
| Repaint, or single-room flooring | Trades direct. |
| New kitchen, no services or structural change | Either, depending on your time. |
| Bathroom with drainage alteration | Main contractor. |
| Full renovation with MEP | Main contractor. |
| Anything needing a permit | Main contractor — registration and submission. |
| Extension | Main contractor and consultant. |
Related Questions
Can I supply my own materials to reduce cost?
Often yes, and it genuinely saves money on items like sanitaryware, tiles and appliances.
Be clear about risk. If you supply it and it arrives late, damaged or short quantity, that is your delay and your cost. Agree the split in writing at the outset rather than when a delivery has already gone wrong.
What does a main contractor actually do for their margin?
Sequences the programme. Coordinates every trade. Supervises quality daily. Obtains permits and NOCs. Carries the insurance. Manages waste and site protection. Prices and controls variations.
And carries the risk when something goes wrong — which, on a complex project, is a substantial part of what you are buying.
Is it cheaper to manage trades myself?
On paper, by the main contractor's preliminaries and margin. In practice it depends on how many interfaces there are. One trade with one dependency, usually yes. Four trades with services between them, usually not — the rebooking cost of one sequencing failure tends to exceed what was saved.
What does a main contractor actually do?
Holds the sequence, the site and the responsibility. A renovation is a chain where every trade depends on the one before, and managing that chain is the work. They also carry single-point accountability, which matters when something fails at the interface between two trades.
When should I definitely use a main contractor?
Anything with services, structure, approvals or more than about three trades. Also anything needing a permit, because the contractor must be registered with the authority to file it. The threshold at which coordination becomes the project is lower than most people expect.
Can I use a main contractor but supply my own kitchen?
Usually yes, and it is a common arrangement. What matters is that responsibility for the interface is clear — who measures, who takes delivery, who is liable if it does not fit. Supplied items need the same written definition as everything else, or they become the gap everyone points at.
What goes wrong when people manage trades themselves?
Sequencing. A trade arrives to find the previous one unfinished, or finished in a way that does not suit, and leaves. Rebooking is a week. Three of those and the saving has gone, along with the time spent arranging them.
Who is responsible if trades blame each other?
With a main contractor, they are — that is largely what you are paying for. Managing trades directly, you are. When tiling fails because the screed was wrong, the tiler blames the screeder and the screeder blames the tiler, and resolving it is whoever holds the contracts, which is you.
Can I act as my own main contractor on a villa?
You can, and people do. What it requires is availability during the working day, a real understanding of sequence, and the willingness to make decisions quickly when a trade is standing waiting. The cost is rarely money; it is time and attention, sustained for months.
What about insurance if I manage trades myself?
It becomes your exposure. A main contractor carries all-risks and workmen's compensation covering the works. Individual trades carry their own, with gaps between them, and damage occurring at an interface is where those gaps show. It is worth checking what your own property insurance says about works in progress.
What does a main contractor's preliminaries cover?
Site set-up and welfare, supervision, protection of the parts of the property not being worked on, waste removal and skips, temporary power and water, insurances, and the approvals administration. These are real costs rather than margin, and they are the ones that get paid twice when a project is phased or when trades are managed separately with gaps between them. On a small project they can look disproportionate, which is the main argument for managing single trades directly. On anything with services or approvals they are what makes the project run, and removing them does not remove the need for them.
Can I start with trades and bring in a contractor later?
It rarely works well. A main contractor taking over part-completed work inherits responsibility for what someone else did without having seen it done, and most will either decline or price the uncertainty heavily. If the project is likely to grow beyond a couple of trades, it is considerably cheaper to appoint properly at the outset than to assemble a project and then ask someone to adopt it halfway through.