Managing a home renovation or extension in Dublin means facing a choice that most homeowners don't anticipate until they're already in too deep: should you hire a single main contractor who coordinates everything, or try to save money by hiring and managing tradespeople yourself?
After 20+ years managing construction projects across Dublin, we've seen both approaches play out. The pattern is remarkably consistent. Homeowners who hire multiple trades directly often save money on paper—but lose it to coordination chaos, scheduling conflicts, and work that needs to be redone.
Here's what the research and our project data actually show about managing multiple trades in Dublin.
For most Dublin homeowners: A single main contractor who handles all trades internally typically saves 15-30% on total project costs compared to self-coordinating multiple trades, while dramatically reducing stress and timeline risk.
When multiple trades make sense: Large-scale new builds, complex commercial projects, or homeowners with construction industry experience who have time to dedicate to full-time project management.
Key finding: The hidden costs of coordinating multiple trades—rework, delays, material waste, and stress—typically exceed any upfront savings within the first month of a project.
Dublin's construction industry runs on tight margins and busy schedules. The tradespeople you'd hire—plumbers, electricians, tilers, plasterers—are booked weeks in advance. Here's what happens when you try to coordinate them yourself:
Your electrician is delayed two days. That means the plasterer can't finish. Which means the painter waits. Which means the kitchen fitter reschedules—again. Every delay compounds.
Getting a tiler for two days of work is nearly impossible in Dublin. Most won't travel for small jobs, so you're waiting for gaps in their schedule—which might be three weeks away.
When two trades show up expecting to work in the same area, someone waits. Dublin terraced houses mean limited space—one trade working often means another can't access their work area.
When a trade finishes early and there's nothing ready for them, you're paying for their travel time to return—or they're simply unavailable when the work is ready.
Real example: A Rathmines homeowner estimated their kitchen extension would take 8 weeks. After coordinating four trades themselves, the project took 14 weeks. The extra 6 weeks cost them €4,200 in rental alternative accommodation they'd planned to avoid.
When something goes wrong on a construction project, the question of responsibility matters—a lot. With multiple trades hired separately, problems tend to get passed between tradespeople until they reach you.
Water damage appears after tiling
Plumber says the seal was the tiler's responsibility. Tiler says the pipe fitting was the plumber's job. Neither wants to pay for the repair.
Electrical work fails inspection
Electrician blames the cable run planned by the previous trade. Inspector doesn't care whose fault it is—the work needs fixing.
Flooring is damaged during plastering
Plasterer says it was already there. Decorator says they didn't touch it. You have €3,000 of reclaimed oak flooring with scuff marks.
When you hire a single main contractor, they own the accountability. If something goes wrong, you have one point of contact. One company responsible. One person who resolves it—or pays for it. This isn't just convenient; it's protection for your investment.
As a single contractor with in-house plumbers, heating engineers, and electricians, we carry full responsibility for your project. If there's an issue between trades, we resolve it internally—never passing the problem to you.
Not all single contractors are the same. Some are project managers who hire the same subcontractors you'd find yourself. The key differentiator is whether a contractor has in-house tradespeople—employees who work for the same company and communicate directly.
| Factor | In-House Team | Subcontracted Trades |
|---|---|---|
| Communication | Daily direct coordination | Through third party |
| Schedule Control | Internal scheduling, fast adjustments | Dependent on external availability |
| Quality Standards | Unified standards, shared responsibility | Varies by trade |
| Accountability | Single company owns all work | Diffuse responsibility |
| Warranty Handling | One call resolves all issues | You chase multiple parties |
Full domestic and commercial installations, rewiring, fuse board upgrades, smart home integration
Bathroom installations, pipework, drainage, appliance connections, leak repairs
Central heating installation, heat pump systems, boiler replacements, underfloor heating
Time is money in construction. Every week your project runs over, you're paying for temporary accommodation, delaying your life plans, and watching costs accumulate. The coordination model you choose directly impacts your timeline.
Typical figures for a medium kitchen extension (30–40 sqm):
| Factor | Single Main Contractor | Self-Coordinated Trades |
|---|---|---|
| Total Project Cost | Lower (bundled pricing) | Higher (coordination costs) |
| Timeline Predictability | High (internal control) | Low (dependent on others) |
| Communication Burden | Minimal (one contact) | Significant (5–8 contacts) |
| Accountability | Single point of ownership | Diffuse (blame shifting) |
| Quality Consistency | Unified standards | Varies by trade |
| Warranty Coverage | One company handles all | You chase each trade |
| Stress Level | Low (outsourced management) | High (full-time job) |
Bottom line: For 85–90% of Dublin homeowners, a single main contractor with in-house trades delivers better value, lower stress, and more predictable outcomes than coordinating multiple trades themselves.
If you're convinced that a single main contractor is the right choice, here's how to find a good one—and avoid the bad ones. Dublin has plenty of builders; finding the right one for your project requires knowing what to look for.
"Do you have your own employees, or do you subcontract?"
You want employees. Subcontractors mean you're back to the coordination problem.
"Can I see your tax clearance certificate and insurance?"
Any legitimate builder has these. If they hesitate, walk away.
"Can I speak with three recent clients with similar projects?"
A builder with good reviews should have happy clients willing to talk.
"What's your process for handling problems when they arise?"
The answer reveals their attitude toward accountability.
"Do you provide a written contract with clear specifications?"
Verbal agreements are worth nothing. Get everything in writing.
J&G Conwell Construction has 20+ years of experience managing complete builds across Dublin. From single-storey extensions to full home renovations, our in-house team handles everything—so you don't have to.
Serving Dublin, Fingal, South Dublin, Dún Laoghaire-Rathdown, and Dublin City Council areas. Free consultations available.
J&G Conwell Construction
Dublin-based builder with 20+ years experience in extensions, renovations, new builds, and modular homes. SEAI registered contractor.