How to Manage Subcontractors as a Builder (Using Job Management Software)

Add a subcontractor to your WhatsApp group and they can suddenly see every customer, every job, and every conversation you've had for months. Not just the one thing they're actually working on.

That's the problem most builders run into once they start working with subcontractors regularly. This guide covers what a subcontractor actually needs to know, how to share job details without handing over everything else, and how job management software solves the access problem that WhatsApp and shared spreadsheets can't.

What subcontractors actually need to know (and what they don't)

A subcontractor needs the site address, the job details, and any photos or notes relevant to the work they're doing. They don't need your other customers, your pricing, or your full job list.

That distinction matters more than it sounds. Most builders default to giving a subcontractor either full access to everything or none at all, because that's how the tools they're using are built. Neither option fits how the relationship actually works. A subcontractor is there for one job, sometimes a handful of jobs. They shouldn't be able to see the rest of your business just because they're helping with one part of it.

Sharing jobs without sharing everything

This is where most builders get caught out. A WhatsApp group works fine at first, but it doesn't scale. Add a subcontractor to the group and they're in every conversation from that point on, whether it's relevant to them or not. A shared spreadsheet has the same problem: give someone edit access and they can see every row, not just the one that's theirs.

Part of the reason this matters is that a genuine subcontractor relationship is different from an employee relationship. The FMB defines a bona fide subcontractor as someone who works without your direction, provides their own tools, carries their own liability insurance, and is typically paid by invoice rather than an hourly rate. They're running their own business alongside yours, not working inside it. Giving them job-specific access rather than blanket access reflects that.

I've seen this exact frustration up close. My sister runs the admin side of a property maintenance business with her partner, and she went looking for a job management tool before we built Trader. Every tool she tried treated people the same way: a person was either fully in the team, seeing everything, or completely outside it, seeing nothing. She worked with electricians, carpenters, plasterers, and landscapers, and none of them needed to see each other's jobs, let alone her full customer list. There was no middle ground on offer.

Keeping site photos and job status updated without WhatsApp chaos

Photos are usually where things fall apart fastest. A subcontractor takes a photo on site and sends it into a WhatsApp thread that already has forty other messages in it. Six weeks later, when you need that photo for a dispute or to show a customer, it's buried somewhere in a scroll of unrelated messages.

The same goes for status updates. A subcontractor tells you a job's finished over text, and that information lives in your messages, not anywhere your team can actually see it. Properly attached to the job means something specific: the photo, and the update, sit against that job's record, not in a separate conversation that happens to be about that job.

Checking a subcontractor before you share anything with them

Before giving a subcontractor access to a job, check their experience, insurance, and health and safety credentials, exactly as you would before any work starts. The FMB recommends checking a subcontractor's experience and training, their health and safety policies, and confirming they carry sufficient insurance for the work, before they're brought onto a job. That's just the vetting side. Our guide on managing subcontractors as a builder covers the contracts and payment side too, if you need the fuller picture.

There's a compliance side to this too. Contractors are required to register for the Construction Industry Scheme and deduct tax from subcontractor payments before passing it to HMRC. That side of things sits outside what job management software covers, but it's worth knowing it runs alongside whatever system you use to share job details.

How job management software handles subcontractor access

The fix for the all-or-nothing problem is job-specific access. Instead of adding a subcontractor to your whole system, you invite them to one job. They see that job's site address, details, and photos. They don't see your other customers, your other jobs, or your finances.

This is what people usually mean by subcontractor management software: not a separate tool bolted onto everything else, but a way of scoping what each person can see. The access is tied to the job, not to you as a person. A subcontractor working for you and three other builders at the same time doesn't need three different systems or one giant group chat that mixes all of it together. They just need to see what's relevant to them, from whoever they're currently working for.

How Trader CRM works for builder and subcontractor teams

Trader CRM is builder project management software built around exactly this problem, and it handles subcontractor access the way my sister needed it to. Each person has their own account. They can belong to one business as an owner or partner, or be invited to any other business as a subcontractor and assigned to specific jobs. The same electrician who's a subcontractor for you might also be a subcontractor for five or six other building businesses, and none of those businesses see each other's data.

Adding someone takes seconds. You invite a subcontractor to a job, they see the site details and photos for that job, and nothing else. If the job ends, so does their access to it. You can upload multiple photos directly from your phone on site, so nothing gets lost in a separate thread. And it all works from a phone, a tablet, or a laptop, whichever you're near at the time.

Sharing jobs the right way

Managing subcontractors well means giving them exactly what they need for the job in front of them, and keeping everything else where it belongs. It has nothing to do with trusting them less.

Invite your first subcontractor in Trader CRM, free during your trial. Start your trial here. You can see what Trader CRM does on the features page, and current pricing on the plans page.

Frequently Asked Questions

How do I manage subcontractors without giving them access to my whole business?

Invite them to a specific job rather than adding them to your full customer list or team. Job management software like Trader CRM lets you assign a subcontractor to one job at a time, so they see the details and photos relevant to that job and nothing else.

What should a subcontractor be able to see in job management software?

The site address, the job details, and any photos or notes relevant to the work they're doing. They shouldn't be able to see your other customers, your cost estimates, or any job they haven't been assigned to.

Do I need to check a subcontractor's insurance before sharing a job with them?

Yes. A genuine subcontractor should carry their own liability insurance and have the relevant experience and health and safety credentials for the work. Check this before you take them on, regardless of what software you use to manage the job afterwards.

Can the same subcontractor work with more than one of my businesses at once?

Yes, and it's common. Many subcontractors work for several building businesses at the same time. With Trader CRM, each person has their own account and can be invited to different businesses as a subcontractor, with each business only seeing the jobs they've assigned to that person.

Is WhatsApp good enough for managing subcontractors?

It works for quick messages, but it doesn't scope access properly. Anyone added to a WhatsApp group can see every message in it, not just the parts relevant to them, and photos or updates get buried over time. Job management software attaches everything to the specific job it belongs to instead.