Process · 10 February 2026 · 2 min read
One contractor or five? What actually goes wrong when you manage trades yourself
Hiring each trade directly looks cheaper on paper. The cost shows up in sequencing, in the gaps between trades, and in who is responsible when something does not line up.
On a multi-trade project, engaging each trade directly is often cheaper on the quotes. Whether it is cheaper on the outturn depends almost entirely on sequencing.
Trades depend on each other
A renovation has a required order. First-fix electrics and plumbing go in before the ceiling closes. Plastering follows first fix. Second fix follows decoration in some areas and precedes it in others. Tiling needs the substrate ready and the wet-area first fix set out to the final layout.
Get the order wrong and work gets undone. The tiler who arrives before the plumber has set out the outlet positions will either wait or tile to the wrong lines.
The gap problem
When each trade is engaged separately, each one is optimising their own schedule. The electrician finishes first fix and moves to another job. The ceiling contractor is booked for the following week. The electrician's second fix cannot be scheduled until the ceiling is done, but by then they are committed elsewhere.
None of them has done anything wrong. The programme still slips, and the person absorbing that is the client.
Who owns the interface
The more consequential issue is responsibility at the boundaries. If a tiled wet area leaks, is that the tiler's tanking or the plumber's joint? If a ceiling cracks around a light fitting, is that the ceiling installer's support or the electrician's cutting?
With separate contracts, each party can reasonably point at the other, and the client is left arbitrating a technical dispute they are not equipped to judge — and paying for whichever remedy they end up believing.
Under a single contract, that interface is internal. It is our problem to resolve, not yours to adjudicate.
When managing trades yourself does make sense
To be fair about it, there are cases where direct engagement works well:
- Single-trade work with no meaningful interfaces — a repaint, a boiler replacement
- Projects with a long, flexible programme, where sequencing gaps cost time but not money
- Clients with genuine construction experience who can sequence the programme themselves
The case weakens as the number of trades and interfaces rises.
What to compare
If you are weighing the two approaches, do not compare the sum of the trade quotes against the main contract price. Compare it against the sum of the quotes plus the programme risk, plus your own time coordinating it, plus the cost of resolving any interface dispute.
That is the actual comparison, and it looks different from the one on the spreadsheet.
