Building a Renovation Schedule That Survives a Late Subcontractor

The plumber runs two days behind and suddenly the whole job is a week late. Not because two days actually costs a week, but because every trade after the plumber was scheduled back to back with zero room to absorb the slip. That's a scheduling problem, not a plumber problem.

Why a tight schedule is actually a fragile schedule

A schedule with every trade booked immediately after the one before it looks efficient on paper. In practice it means a single delay anywhere in the sequence, a backordered material, a sick crew member, a failed inspection, pushes every single trade behind it by the same amount. Renovation work has more variables than new construction: existing walls hide surprises, older homes fail inspections more often, and homeowners living through the work create access constraints a vacant lot never has. A schedule that doesn't plan for any of that is a schedule that fails on the first real project.

How much slack to actually build in

The goal isn't padding every phase equally, it's putting slack where delays actually happen. Demo and rough in (plumbing, electrical, HVAC) are where hidden condition surprises show up, so give those phases 15 to 20 percent more time than your best case estimate. Cabinet and countertop install depends on outside lead times you don't control, so build the order date backward from a real fabricator lead time, not a hopeful one. Final finishes and punch list rarely need much slack since they're mostly your own crew's time, but always leave a buffer before a client's fixed move in date rather than scheduling right up against it.

What to do when a sub actually runs late

• Call the moment you know, not the moment the delay hits. A two day heads up lets everyone downstream adjust before it compounds.
• Look for parallel work. Paint prep, trim material staging, and fixture unboxing can often move earlier without waiting on the delayed trade.
• Reset the whole downstream schedule once, clearly, in writing, instead of letting the client discover the new date phase by phase.

What to do about it starting Monday

Pull your current schedule and check which phases are booked with zero gap between them. Add real slack to the two or three riskiest transitions, especially anything depending on an inspection or a materials lead time you don't control. That alone prevents most of the "one late sub, whole job late" scenarios before they happen.