How to Find Subcontractors: Where to Look, How to Vet Them

The best way to find subcontractors is through the trades you already work with: ask every good sub who they would recommend for the disciplines you do not cover. Back that up with builders' merchant counters, online subcontractor platforms and local trade groups, then vet every name the same way before a client's job depends on them.

Here's the truth that decides whether this business is freedom or misery: your subcontractors are your product. You can be brilliant at sales and pricing, but if the trade does poor work or doesn't show up, it's your name on the contract and your reputation on the floor. Finding and vetting trades well is the highest-leverage skill in the entire model.

Where to find subcontractors, ranked by quality#

Ranked by quality of what you'll typically get:

• Referrals from other trades. Good tradespeople know other good tradespeople. Ask every trade you work with who they'd recommend for the disciplines you don't yet cover. This is the gold source.
• Referrals from clients and your network. "Who did your extension? Were they any good?" Warm, proven, often available.
• Builders' merchant counters. The trades buying materials at 7am are working trades. A relationship with the counter staff at a local merchant can introduce you to busy, reliable crews.
• Trade job boards, platforms and apps. Plenty of platforms list subcontractors looking for work. Useful for volume, but you must vet hard - anyone can list. The ones worth your time are in the next section.
• Local trade Facebook groups. Fast and free, same caveat: vet everyone.

Avoid building a business on cold directory leads alone. Anyone can pay to be listed; not everyone can be vouched for. Sourcing names is the easy half - separating good subcontractors from merely available ones is what the first call, the cheap quote and the paid trial are actually for.

How to find subcontractors online#

Online is where most people start and where most people get burned, because most of these platforms are built to sell leads to trades, not to find trades for you. Use them with that in mind: they give you names, you do the vetting.

In the UK:

• Constructionline. Once you hold the contract you are the buyer, and buyers can search its database of pre-qualified contractors by trade and region. Every firm on it has already completed the pre-qualification questionnaire and, at Gold and above, had its health and safety evidence verified - which takes a chunk of the vetting off your plate. Best for established firms rather than one-man bands.
• Trade job ads on Indeed and the trade boards. Post the trade, the area and the day rate and you will have working trades replying within days. Treat it as a first filter only.
• CIS labour agencies. They supply CIS-registered trades at a day rate plus their margin. Expensive, but the fastest way to fill a gap on a live job while you build your own bench.
• Checkatrade, MyBuilder and Rated People. Built for homeowners, but they list working trades with reviews, photos and a phone number. Good for finding names in a specific town; vet exactly as hard as a cold call.
• LinkedIn and trade Facebook groups. Search the trade plus the town, or post that you have steady work coming. The serious ones reply with photos of finished jobs.

In the US and Canada:

• The Blue Book Network. The long-standing commercial construction directory where general contractors find subs by trade and region and send out bid invitations.
• BuildingConnected and the Procore Construction Network. Bid-management tools with large subcontractor networks attached. Both let you search by trade and location and invite subs to price a scope.
• Angi, HomeAdvisor and Thumbtack. Consumer-facing, the same caveat as the UK homeowner platforms: names and reviews, not vetting.
• Local AGC and ABC chapters and the trade associations. Member directories of real firms, and meetings where subs are actively looking for general contractors to work under.

Wherever you find them, the next move is the same: get the relationship off the platform and onto the phone. And once you have a bench, run the jobs on something built for the flow. A platform like Plan a Job is where you send each job out to your subs, get their prices back and add your markup on one record, instead of chasing it across five apps.

Finding subcontractors near you#

"Near me" is the right instinct. A sub forty miles away turns down your small jobs and turns up late to the big ones. The local sources that work:

• Vans and hoardings. The trades working your patch advertise on their own vans. Note the names you see on the same streets week after week; a trade with steady local work is usually a good one.
• Your client's last trade. Ask every client who did their previous work and whether they would use them again. A trade the client already trusts is easier to sell on the next job too.
• Google Maps, used properly. Search the trade and the town, skip the paid results, and look for a business with recent reviews, a live phone number and photos of real jobs. Call as a contractor offering steady work, not as a customer asking for a quote - it is a different conversation.
• Local trade WhatsApp and Facebook groups. Every town has one. Ask who is free next week and watch who answers with a photo and a price.

The vetting checklist#

Before you trust a trade with a real client's job, run every one of these. Skipping any is how cowboys get onto your sites:

1. Insurance. They must carry their own liability cover (and employer's liability if they have staff). Ask for the certificate. No cover, no work - their accident becomes your lawsuit otherwise.
2. Certifications for regulated work. Gas and electrical work must be done by someone licensed or registered for your country (Gas Safe for gas in the UK; a state or provincial trade licence in the US and Canada; national equivalents elsewhere). Verify the licence or registration number, don't take their word.
3. Proof of recent work. Photos of jobs they've actually done, and ideally a past client you can call. A real trade has a phone full of finished work.
4. Day rate and pricing, in writing. Agree what they charge before you ever quote a client. A text confirming the rate is enough - vagueness here destroys your margin.
5. Availability and reliability signals. Do they answer the phone? Reply when they say? Turn up to the first meeting on time? How someone behaves before you've paid them is the best preview of how they'll behave after.
6. A small trial first. Never bet a $40k job on an untested trade. Give a new sub a small, low-stakes job and watch everything - quality, timekeeping, communication, cleanliness. Promote the ones who pass.

Each of these has a deeper version - the licence databases, what to ask the insurer, how to run a reference call - in how to vet subcontractors before you give them a job.

Cowboys reveal themselves on the small jobs. Test cheap, then trust expensive.

How to hire subcontractors once you have found them#

Finding the name is half the job. Hiring them properly is what keeps the spread yours when something goes wrong. The five checks below are the short version; day rate versus price work, retention and what belongs in the written agreement are covered in full in how to hire a subcontractor. Before the first day on site:

1. Scope in writing. What is included, what is not, who supplies materials, who clears the waste. Most disputes with subs are scope disputes that were never written down.
2. Price and payment terms in writing. Day rate or fixed price, when they invoice, when you pay. Milestone payments on anything longer than a few days; never pay in full up front. Where your number sits on top of theirs is covered in how much general contractors mark up subcontractors.
3. Insurance certificate on file before they start. Public liability as a minimum, employer's liability if they bring anyone. In the US, ask for a certificate of insurance naming you as additional insured.
4. The paperwork your tax system demands. UK: verify every new sub with HMRC under the Construction Industry Scheme before you pay them. HMRC tells you whether to deduct 20%, 30% or nothing from the labour element, and an under-deduction is your liability, not theirs. US: a W-9 before the first payment, a 1099-NEC at year end once payments cross the IRS reporting threshold, and a lien waiver with each payment wherever your state uses them. The UK side in full, consent clauses and CDM duties included, is in the subcontracting rules UK contractors must follow.
5. Start date, access and who they report to. If you will not be on site, say so on day one and set the check-in rhythm before the first photo is due.

Get this right once, turn it into a one-page template, and every new sub after that is a twenty-minute onboarding rather than a negotiation.

Build a bench, not a dependency#

The most expensive mistake in this business is depending on a single trade per discipline. The day your only plumber is sick, double-booked, or simply ghosts you, your job stops dead - and the client doesn't care whose fault it is. They blame the company on the contract. You.

So build a bench: at least two vetted, reliable trades for each core discipline (plumbing, electrics, general building, tiling, plastering, decorating). Keep them warm with steady work even when you don't strictly need both. Redundancy isn't waste - it's the insurance policy that lets you promise clients certainty and actually deliver it. How big the bench needs to be depends on your trade mix; how many subcontractors you actually need works through it from one sub to a full database.

Treat your trades like the asset they are#

Good trades have options. If you're a hassle to work with - slow to pay, vague on scope, chaotic on scheduling - the best ones quietly stop answering and you're left with whoever's available. Become the operator the best trades want to work for:

• Pay on time, every time. This alone puts you ahead of most of the cowboys who hire trades. It buys loyalty and first dibs on their diary.
• Give clear scope and clean sites. Respect their time; don't make them figure out the job on arrival.
• Bring them steady, predictable work. A reliable pipeline of jobs is worth a premium to a tradesperson, and it earns you their best rate and their best behaviour.

The reasons good subcontractors leave main contractors are always the same three - late payment, wasted days and margin squeezing - and all three are in your control.

Reading this as a subcontractor?#

Then you are on the other side of the same table, and the fastest way up it is to become the one holding the contract. From subcontractor to main contractor walks the ladder rung by rung, and getting on a council approved contractor list is the first public door most firms walk through.

The next step#

Look after your bench and your hardest operational problem - delivery - quietly solves itself. That is the whole of construction arbitrage in one line: win the work, hand it to trades you trust, keep the margin. Now learn to run them when you're not there: Managing Subcontractors You've Never Met.