Ninety two percent of construction firms report having a hard time finding workers to hire, and 45 percent say labor shortages are directly causing project delays, according to a nationwide survey from the Associated General Contractors of America.
That single statistic explains a lot about why commercial construction delays have become such a common frustration for property owners and developers, but labor is only one piece of the picture.
Understanding what actually causes a project to fall behind schedule helps owners plan realistically and choose a contractor who knows how to manage these risks before they turn into missed deadlines.
What Causes the Most Commercial Construction Delays?
A few root causes show up again and again across projects of every size:
- Labor shortages. Skilled trades are in short supply nationwide, and a project can stall simply because there are not enough qualified electricians, framers, or plumbers available to keep pace with the schedule.
- Material and supply chain issues. Long lead times on items like electrical equipment, HVAC systems, and specialty components remain a real constraint, even though supply chain disruptions have eased somewhat compared to a few years ago.
- Permitting and inspection delays. Local building departments vary widely in how quickly they review plans, and a single round of corrections can add weeks to a schedule that looked tight to begin with.
- Funding and financing uncertainty. Higher financing costs and shifting project budgets can cause an owner to pause or scale back a project mid stream, which ripples through the contractor’s schedule.
- Weather. Even in a climate like Arizona’s, where extreme heat is more often the issue than rain or snow, weather still affects concrete curing times, worker safety protocols, and outdoor work windows.
- Design changes and incomplete plans. A design that is not fully coordinated before construction starts almost always leads to change orders, and change orders almost always cost time.
How Much Do Labor Shortages Really Affect Commercial Construction Delays?
More than most owners expect. The Associated General Contractors of America reports that workforce shortages are now the leading cause of project delays nationwide, with nearly one in three firms also reporting some impact from immigration enforcement actions affecting their available workforce. This is not just a big city problem.
Contractors in growing markets like Phoenix and Tucson compete for the same limited pool of skilled tradespeople as contractors everywhere else, and that competition shows up directly in how quickly a project can be staffed and completed.
Do Tariffs and Material Costs Cause Commercial Construction Delays?
Yes, increasingly so. Recent industry reporting found that nearly 22 percent of contractors had a project delayed or canceled due to tariffs, with 87 percent reporting they had been notified of tariff related materials price increases, according to Engineering News-Record.
When material costs rise unexpectedly mid project, owners sometimes pause construction to reassess the budget, which adds delay on top of whatever the direct supply chain impact already was. AGC’s own national outlook survey lists rising material and labor costs alongside funding uncertainty as the leading causes contractors expect to affect projects going forward, according to the AGC 2026 Construction Outlook Survey.
How Common Are Delays on Large Commercial Projects?
Very common, and often more severe than people assume. Research from McKinsey found that 98 percent of megaprojects suffer cost overruns of more than 30 percent, and 77 percent run at least 40 percent behind schedule. While most commercial buildings in Arizona are nowhere near the scale of a global megaproject, the same underlying causes, poor early planning, incomplete design coordination, and unrealistic initial schedules, show up at every project size. This is exactly why the planning phase matters so much before ground is ever broken.
How Does Pre-Construction Planning Reduce Delays?
Most commercial construction delays trace back to decisions made, or not made, before the first shovel ever hits the ground. A thorough pre-construction phase gives the project team time to identify long lead materials, confirm permitting requirements with the local jurisdiction, and finalize design details before they become expensive change orders mid construction.
This phase typically includes a detailed constructability review, where the contractor walks through the design looking for conflicts between systems, unrealistic sequencing assumptions, or specifications that might create sourcing problems given current market conditions. Skipping or rushing this step is one of the most common reasons a project that looked fine on paper runs into trouble once construction actually starts.
How Does Arizona’s Climate Affect Construction Scheduling?
Arizona’s extreme summer heat shapes commercial construction schedules more than many owners from other regions expect. Concrete curing, roofing work, and even certain adhesives and sealants have manufacturer specified temperature limits that can push work into early morning hours or shift it to cooler months entirely.
OSHA heat illness prevention requirements also affect how contractors schedule outdoor labor during the hottest parts of the year, which can extend the workday or require additional crew rotation to maintain both safety and productivity.
Experienced local contractors build these seasonal realities into their schedules from the start rather than treating summer heat as an unplanned disruption. This is one of the clearest examples of why local market experience matters as much as general commercial construction experience when selecting a contractor for a project in Phoenix, Tucson, or anywhere else in the state.
What Role Does Communication Play in Avoiding Delays?
A surprising share of commercial construction delays come down to communication breakdowns rather than any single technical problem.
A subcontractor who does not know a design detail changed, a supplier who was not given enough lead time notice, or an owner who was not consulted before a decision was made can each turn a minor issue into a significant schedule setback.
Regular progress meetings, a clearly defined process for submitting and approving change orders, and a single point of contact managing the overall schedule all reduce the odds that a small miscommunication turns into a costly delay. This is particularly important on projects involving several specialized trades working in close sequence, where one trade falling behind schedule has a ripple effect on every trade that follows.
How Do Permitting and Inspections Cause Delays?
Every jurisdiction has its own process, staffing levels, and review timelines, and this is one of the least predictable parts of any commercial build. A single missing document or an incomplete first submission can trigger a correction cycle that adds weeks back onto the schedule.
Projects involving specialized use types, like a retail building with drive through access or an office building with a complex mechanical system, often face additional review from separate departments handling zoning, fire safety, and utilities, each on its own timeline.
Experienced contractors manage this risk by submitting complete, well coordinated plans the first time and by building realistic permitting timelines into the schedule from the start, rather than assuming the fastest possible review will happen.
How Do Design Changes Affect Construction Schedules?
Design changes made after construction has started are one of the most disruptive causes of delay, because they often require reworking completed work, reordering materials, and re-coordinating subcontractors who had already scheduled their crews around the original plan.
This is especially true for commercial building services that involve multiple specialized trades working in sequence, since a change to one system, like electrical capacity, can require adjustments to mechanical, plumbing, and structural work that was designed around the original assumptions.
This is part of why value engineering and thorough design review before construction begins are so valuable. Catching a needed change during design, when it is just a drawing revision, is far less costly and time consuming than catching it after framing or rough in work has already been completed.
How Do You Recover a Schedule Once a Project Falls Behind?
Even with careful planning, some commercial construction delays are unavoidable, and how a contractor responds once a project starts slipping matters as much as how well it was planned in the first place. A few approaches commonly used to recover lost time include:
- Fast tracking overlapping activities. Instead of waiting for one phase to fully finish before starting the next, some tasks can run in parallel once enough of the preceding work is complete, though this requires careful coordination to avoid rework.
- Adding crews or shifts. Bringing on additional labor or running extended hours can compress a schedule, though this comes with added cost and depends heavily on whether qualified labor is actually available given ongoing workforce shortages.
- Expediting material delivery. Paying a premium for faster shipping or air freight on a critical material can sometimes recover weeks of schedule, though this is usually a last resort given the added expense.
- Reprioritizing the critical path. A good project manager identifies which activities are actually driving the completion date and focuses recovery efforts there rather than spreading resources thin across every delayed task equally.
None of these options are free, which is exactly why avoiding delays in the first place through solid pre-construction planning is almost always more cost effective than recovering from them after the fact.
What Can Owners Do to Reduce the Risk of Delays?
A few practical steps make a real difference:
- Choose a contractor with a strong track record managing labor and material logistics, not just one offering the lowest bid. A contractor with established subcontractor relationships and reliable material suppliers is better positioned to keep a schedule on track when shortages hit the broader industry.
- Build a realistic contingency into the schedule, particularly for permitting, which is one of the least controllable variables in any project.
- Finalize design decisions before construction starts whenever possible, since late changes are consistently one of the most expensive and time consuming sources of delay.
- Ask contractors directly how they plan to handle material lead times for long lead items like specialized equipment, and confirm those orders are placed early rather than after construction begins.
Planning Around Commercial Construction Delays
Commercial construction delays are rarely caused by just one thing. Labor shortages, material costs, permitting timelines, and late design changes all compound each other, and a contractor who understands how to plan around these realities protects a project far better than one who simply hopes for the best.
Whether you are building an office building, a restaurant, or any other commercial space in Arizona, choosing a team with a proven process for managing these risks is one of the most important decisions you will make before construction ever begins.
If you are planning a commercial project and want to talk through realistic timelines from the start, Canyon BD can walk you through the process and what to expect for your specific building type.
