Common Defects We Find in New Construction Homes Across Arizona
When buyers step into a brand-new home—complete with fresh paint, sparkling countertops, and modern finishes—they often assume everything behind the walls is just as flawless.
But the truth is: new construction does not always mean defect-free.
At Dwellinspect Arizona, we inspect hundreds of newly built homes every year across the Phoenix metro area, and we consistently uncover construction oversights that, if left unchecked, can lead to expensive repairs, performance issues, or even safety concerns. From Queen Creek to Surprise, no subdivision or builder is immune to construction defects.
Below, we’ll explore the most common issues we find during new construction inspections and explain why buyers should never skip them—even when the home is fresh off the job site.
Grading and Drainage Errors
The problem:
Arizona’s dry climate often gives builders (and buyers) a false sense of security when it comes to water management. But grading errors are one of the most frequent—and most serious—issues we find in new homes.
What we see:
Negative slope that drains water toward the foundation
Missing or improperly installed splash blocks and extensions
Settling near patios, walkways, or A/C pads that cause pooling
Why it matters:
Poor drainage around a home can cause foundation settlement, moisture intrusion, or even slab cracking—especially in areas with expansive soil, which is common across Maricopa County. Drainage problems can remain hidden until the first major monsoon hits.
HVAC Oversights
The problem:
HVAC systems in Arizona work overtime during the summer—and new builds aren’t always equipped with properly designed or installed systems.
What we see:
Undersized units that struggle to cool the home efficiently
Crushed or poorly sealed ductwork in attics
Inconsistent airflow between rooms or floors
Missing return vents in larger rooms
Why it matters:
An HVAC system that doesn’t match the home’s size and layout will lead to uneven temperatures, high utility bills, and reduced system lifespan. In our inspections, we test airflow to ensure clients are getting the performance they paid for.
Attic Insulation Gaps
The problem:
Insulation is often installed in a rush during the final phases of construction, when deadlines are looming. Unfortunately, this leads to coverage gaps, thin spots, or missing insulation altogether, especially in hard-to-see areas like eaves or corners.
What we see:
Blown-in insulation that doesn’t meet R-value requirements
Missing baffles or vent chutes, causing airflow issues
Exposed attic access points with no weatherstripping
Why it matters:
Even small insulation deficiencies can make a big difference in Arizona’s extreme temperatures. Poor attic insulation contributes to higher energy costs and reduced comfort, especially during triple-digit summers.
Roof Flashing and Tile Misalignment
The problem:
The roof is your home’s first line of defense, but minor mistakes during installation can lead to major leaks down the line.
What we see:
Flashing installed under—not over—shingles or tiles
Improper kick-out flashing at roof-wall intersections
Loose, crooked, or overlapping tiles
Why it matters:
These errors may go unnoticed during dry spells, but they can lead to water intrusion, mold growth, and structural damage once Arizona’s monsoon season rolls in. A proper roof inspection is critical, even when everything looks perfect from ground level.
Real Agent Insight: Use This Checklist to Guide Clients
As a real estate agent, you're often the first person a buyer turns to for advice during the new construction process. Help your clients make smarter decisions with this inspection preparation checklist, based on our field experience:
New Construction Inspection Checklist for Agents & Buyers
Grading Check: Ensure soil slopes away from the home for at least 6 feet.
HVAC Verification: Confirm system tonnage matches home size; ask for Manual J/S report if available.
Duct Integrity: Look for crushed or loose ducts in the attic.
Insulation Coverage: Confirm uniform R-value in all attic areas; inspect garage ceilings and access covers.
Roof Evaluation: Inspect flashing at walls, chimneys, and valleys; check tiles for alignment and secure placement.
GFCI/AFCI Testing: Confirm proper protection in all required outlets.
Final Walkthrough Prep: Bring blue tape for cosmetic defects—but don't skip the inspection for structural or systems review.
Print this list out or send it digitally to buyers before their inspection—it’s a small gesture that builds lasting trust and positions you as a knowledgeable and proactive partner.
Final Thoughts
Every home, new or old, has potential issues. The key difference? In new construction, you still have the builder’s warranty to back you up. But only if you identify the issues before the warranty expires.
At Dwellinspect Arizona, we know where and how to look for the most common (and costly) defects in new construction homes. Our detailed reports, including photos and recommendations, help buyers take informed action—before hidden problems become permanent headaches.