Common Causes of Construction Delays (and How Planning Helps)

One of the biggest concerns homeowners have when considering a remodel, ADU, or new construction project is timing. Delays are frustrating—especially when expectations aren’t clear from the start.

While every project is different, most construction delays in Los Angeles are not random. They tend to fall into a few predictable categories. Understanding these early can help homeowners plan more realistically and reduce stress throughout the process.

Delays Often Start Before Construction Begins

Many people associate delays with construction itself, but in reality, some of the most impactful delays happen before work ever starts on site.

Early planning decisions—such as scope definition, design coordination, and feasibility review—play a major role in how smoothly a project progresses later.

Permitting and Plan Review Timelines

Permitting is one of the most common sources of delay in Los Angeles. Projects often require review by multiple departments, each with its own process and timeline.

Factors that influence permitting duration include:

• Scope and complexity of the project

• Completeness of submitted plans

• Zoning overlays or site-specific conditions

• Reviewer workload and scheduling

These timelines are rarely predictable to the week—and they’re often outside a homeowner’s or builder’s direct control.

For a deeper look at why approvals take time, see our resource on Why Permitting Takes So Long in Los Angeles.

Design Changes and Scope Adjustments

It’s common for projects to evolve as homeowners see plans come together. Changes to layout, finishes, or scope can feel small, but they often have ripple effects.

Design changes can:

• Require revised drawings

• Trigger additional reviews or approvals

• Affect material lead times

• Shift construction sequencing

Clear scope definition early on helps minimize mid-project changes and the delays that come with them.

Utility Coordination and Infrastructure Upgrades

Utility work is another frequent source of delay—particularly for ADUs and larger projects.

Delays can occur due to:

• Electrical service upgrades

• Sewer or water connection requirements

• Coordination with utility providers

• Inspections tied to utility work

Because utilities often involve third parties, timelines can extend beyond the construction schedule itself.

Inspections and Scheduling Constraints

Construction projects require inspections at key milestones. While inspections are a normal part of the process, scheduling them can sometimes introduce delays.

Factors include:

• Inspector availability

• Required corrections

• Sequencing dependencies between trades

Well-coordinated projects tend to move through inspections more smoothly, but some waiting is inevitable.

Material Availability and Lead Times

Material lead times have become an increasingly important consideration. Custom or specialty items—such as cabinetry, windows, or fixtures—may have longer production timelines.

Delays can happen when:

• Selections are made late

• Materials arrive damaged or incomplete

• Substitutions are required

Making key selections earlier in the process helps reduce these risks.

Weather and Site Conditions

While Los Angeles has relatively mild weather, site conditions can still affect progress.

Unexpected conditions—such as soil issues, drainage challenges, or existing structural concerns—may not be fully apparent until construction begins.

Addressing these responsibly can add time but helps protect long-term quality and safety.Utility Coordination and Infrastructure Upgrades

How Planning Helps Reduce Delays

While no project can eliminate delays entirely, thoughtful planning can significantly reduce avoidable ones.

Early planning helps by:

• Identifying constraints before design begins

• Establishing realistic timelines

• Clarifying scope and priorities

• Coordinating consultants early

• Setting expectations around flexibility

Homeowners who understand the process tend to experience fewer surprises and a smoother overall experience.

What This Means for Your Project

Delays don’t necessarily indicate a problem—they often reflect the realities of building in Los Angeles.

Whether you’re considering an ADU, remodel, or new construction project, understanding common delay causes allows you to plan with patience and perspective.

For a broader overview of planning considerations, timelines, and next steps, explore our Resources page or visit the hub that matches your project type:

• Planning an ADU

• Planning a Remodel

• Planning New Construction

A Thoughtful Next Step

If you’re early in the planning process and want help understanding how timelines and potential delays may apply to your specific project, a planning call can help clarify next steps.

Schedule a Planning Call

Well-planned projects don't avoid every delay, but they handle them with clarity and intention.