Keeping subcontractors organised, on time and on task is one of the hardest parts of running a renovation business. A delayed electrician holds up the plasterer. A plasterer who doesn't show creates a domino effect that pushes the whole job back by a week. And when things go wrong on a renovation site, it's the main contractor who answers to the client.
This guide covers how to manage subcontractors effectively — from vetting and briefing through to keeping them on track and handling problems when they arise.
Vet subcontractors before you need them
The time to build your subcontractor network is not when you're standing on a site that needs an electrician tomorrow. The best contractors maintain a roster of trusted, vetted subcontractors across all the trades they regularly need — plumbers, electricians, plasterers, tilers, decorators — and have backup options for each.
What to check before using a subcontractor
- Licensing: Electricians must be Part P registered (NICEIC or NAPIT). Gas engineers must be Gas Safe registered. Always verify — don't just take their word for it.
- Insurance: Public liability insurance is essential. Ask for a current certificate and verify it with the insurer if in doubt.
- References: Ask for references from recent similar work and follow up on them. A five-minute call to a previous contractor tells you more than any CV.
- Reliability: The best technical skill is worthless if a subcontractor doesn't show up. Ask specifically about reliability in your reference checks.
Pay your subcontractors on time, every time. The best subbies have choices about who they work for. Being known as someone who pays promptly and treats people professionally will get you access to better subcontractors and preferential availability.
Brief subcontractors properly
A brief that leaves things vague creates problems. Subcontractors who don't know exactly what's expected of them make assumptions — and those assumptions are often wrong, expensive or both.
What a good brief includes
- Exact scope of work — what is and isn't included
- Site address and access arrangements
- Start date and expected duration
- Other trades on site and sequencing — who needs to finish what before they can start
- Materials — who is supplying what
- Client expectations around site cleanliness and behaviour
- Your payment terms
Put the key details in writing — even a brief WhatsApp message is better than nothing. If a dispute arises later about what was agreed, written confirmation protects everyone.
Sequence trades correctly
On any renovation project, the order in which trades work is critical. Get the sequencing wrong and you'll have people standing around waiting, work having to be redone, or — worst of all — damage to completed work.
A typical renovation trade sequence
- Strip out: Removal of existing fixtures, fittings and surfaces
- Structural work: Any walls removed or modified, beams installed
- First fix plumbing: Pipework before walls are closed
- First fix electrics: Cables and back boxes before plastering
- Plastering: Walls and ceilings finished
- Second fix plumbing: Radiators, sanitaryware, kitchen sink
- Second fix electrics: Sockets, switches, light fittings
- Tiling and flooring
- Kitchen and bathroom fitting
- Decoration: Painting and finishing
This sequence varies by project but the principle is consistent: services before surfaces, structural before decorative. Communicate the sequence clearly to every subcontractor on site.
Always build buffer into your sequencing. If the plasterer is booked for Monday and needs the electrician to finish first fix by Friday, book the electrician for Wednesday — not Friday. Trades overrun. Always.
Keep subcontractors informed in real time
One of the most common sources of friction between main contractors and subcontractors is poor information flow. If a subcontractor turns up on site not knowing there's been a change to their scope or sequence, they're rightly frustrated — and the day is wasted.
The key is giving subcontractors visibility of exactly what they need to see on the project — their tasks, their sequence and any updates — without overwhelming them with information that isn't relevant to them.
Give subcontractors exactly what they need
RenovateIQ Business lets subcontractors join your project with a simple code. They see their tasks, tick them off and message you directly — nothing more, nothing less.
Download on the App StoreHandle problems quickly
Problems with subcontractors are inevitable on any renovation project. The difference between contractors who manage them well and those who don't is speed of response.
When a subcontractor doesn't show up
Contact them immediately. If you can't reach them within an hour, start activating your backup options. Don't wait until the afternoon hoping they'll appear — time on a renovation site costs money and delays the whole project.
When work isn't up to standard
Address it immediately and directly, without the client present. Show the subcontractor specifically what isn't right and agree how and when it will be fixed. Don't make final payment until snagging is complete.
When there's a dispute about scope or payment
Go back to what was agreed in writing. This is why documenting agreements matters. If the scope creeps — as it often does — agree the additional cost in writing before the additional work is done, not after.
Managing subcontractors well is a skill that takes time to develop. The contractors who do it best have clear processes, communicate proactively, build strong relationships with reliable subbies and deal with problems head-on rather than hoping they'll resolve themselves. Get those things right and the rest of project management becomes significantly easier.