New Construction Inspection: What to Check Before the Builder's Warranty Expires

Every home inspector hears this from homeowners: "It's brand new — do I really need an inspection?" The answer is always yes. And if you're the inspector, your answer should include why. New construction inspections consistently reveal defects — not because builders are incompetent, but because residential construction involves hundreds of subcontractors, thousands of decisions, and a schedule that rewards speed over perfection.

A new construction inspection checklist isn't just a homeowner protection tool. For inspectors, it's a revenue stream and a reputation builder. Homeowners who hire you for a pre-drywall or warranty inspection become clients for life. They refer friends. They call you back when they sell. This is how you build a practice.

This guide covers the three critical inspection phases for new construction — pre-drywall, final walkthrough, and the 11-month warranty inspection — along with the specific defects builders commonly miss, documentation strategies for warranty claims, and when to recommend specialists.

Why New Construction Needs Inspection

Municipal building inspectors are overworked, understaffed, and often reviewing dozens of homes at various stages in a single day. They check for code compliance at specific milestones, but they don't perform a comprehensive quality assessment. They're looking at minimum standards. You're looking at workmanship, installation quality, and long-term performance.

Common reasons new construction has defects:

• Subcontractor coordination failures — The plumber's rough-in conflicts with the HVAC duct route. The framer leaves gaps the insulation contractor doesn't fill.
• Schedule pressure — Production builders work on tight timelines. When the schedule slips, corners get cut.
• Workforce variability — The quality of a framing crew can vary dramatically from one house to the next in the same development.
• Incomplete punch lists — The builder's own quality control misses items that a fresh set of eyes catches immediately.

Phase 1: Pre-Drywall Inspection

The pre-drywall inspection is the most valuable inspection phase in new construction. Once drywall goes up, you lose visibility into the structural, mechanical, electrical, and plumbing systems that define whether this house will perform well for decades or develop problems within years.

When to Schedule

The pre-drywall inspection should occur after:

• Framing is complete
• Rough plumbing is installed
• Rough electrical is installed
• HVAC ductwork and equipment are roughed in
• Insulation is installed (ideally before drywall but sometimes done simultaneously)

And before:

• Drywall installation begins
• Interior finishes cover the framing

This window is often narrow — sometimes just 3-5 days. Advise your clients to coordinate timing with the builder early and establish a firm date.

What to Check: Pre-Drywall Checklist

Framing

• Stud spacing — 16" on center for load-bearing walls, verify per plans
• Header sizing — Adequate for window and door openings
• Fireblocking — Required at floor/ceiling transitions, soffits, and utility penetrations
• Nailing patterns — Proper nail spacing on sheathing, rim joists, and connections
• Simpson ties and connectors — Hurricane straps, hold-downs, joist hangers — verify they're installed per engineering
• Plywood vs. OSB sheathing — Verify against specs and check for water damage before enclosure
• Notching and boring — Studs, joists, and rafters haven't been over-cut for plumbing or HVAC runs
• Crown direction on joists — All crowns should face up

Electrical Rough-In

• Wire gauge — Correct gauge for circuit amperage (14 AWG for 15A, 12 AWG for 20A)
• GFCI/AFCI locations — Verify protected circuits per current code
• Box fill — Junction boxes aren't overfilled
• Staple spacing — Wiring properly secured
• Smoke/CO detector locations — Every bedroom, outside sleeping areas, every level
• Panel location and capacity — Sufficient capacity for the home's electrical load
• Dedicated circuits — Kitchen, bath, laundry, HVAC, garage — all present

For a comprehensive electrical reference, see our electrical inspection checklist.

Plumbing Rough-In

• Supply line material — PEX, copper, or CPVC per specs
• Drain slope — 1/4" per foot minimum on horizontal runs
• Vent configuration — Every fixture properly vented
• Water heater location — Adequate clearance, proper venting planned
• Hose bib placement — Frost-free where required
• Shut-off valves — Accessible for every fixture group
• Support and strapping — Pipes properly supported at intervals

See our plumbing inspection checklist for detailed documentation guidance.

HVAC Rough-In

• Duct sizing — Matches equipment capacity and design load
• Duct connections — Sealed at joints, properly supported
• Return air pathways — Adequate returns in every room with a supply register
• Equipment location — Adequate clearance for service access
• Refrigerant line routing — Protected, properly insulated
• Condensate drain — Routed to appropriate termination point
• Exhaust fan ducting — Bath fans and range hoods ducted to exterior (not into attic)

Our HVAC inspection checklist covers system documentation in detail.

Insulation

• R-values — Match or exceed code requirements for the climate zone
• Coverage gaps — No voids, compressions, or missing sections
• Exterior wall cavities — Completely filled, especially around windows and doors
• Rim/band joists — Insulated (commonly missed)
• Attic insulation — Correct depth and type, baffles at eaves for ventilation
• Air sealing — Penetrations sealed before insulation installation

Moisture Management

• House wrap/WRB — Installed correctly with proper lapping and sealed penetrations
• Window and door flashing — Integrated with the WRB, proper head flashing
• Kickout flashing — Where roofs meet sidewalls (one of the most missed details in new construction)
• Vapor barriers — Correct placement for climate zone (warm-side installation)

Phase 2: Final Walkthrough Inspection

The final walkthrough inspection happens after construction is complete and before the homeowner closes. This is the most common new construction inspection — many homeowners skip pre-drywall but at least get this one.

What to Check: Final Walkthrough Checklist

Exterior

• Grading and drainage — Positive slope away from foundation (minimum 6 inches in 10 feet). This is one of the most common defects in new construction. See our exterior inspection checklist for documentation details.
• Downspout extensions — Discharge at least 6 feet from foundation
• Siding installation — Proper nailing, clearance from grade, flashing at transitions
• Concrete flatwork — Driveway, walkways, patio — check for premature cracking, settling, proper slope away from structure
• Landscaping grading — Final grade maintains drainage away from foundation

Roofing

• Shingle installation — Starter course, exposure, nail pattern, hip and ridge caps
• Flashing — Step flashing at walls, valley flashing, pipe boot seals
• Ventilation — Ridge vent, soffit vents, or powered ventilation per design
• Gutters — Properly sloped, sealed at joints, secured

See our roofing inspection checklist for comprehensive roof documentation.

Interior Systems

• Electrical — All outlets operative, GFCI protection functional, panel properly labeled
• Plumbing — All fixtures functional, no leaks at connections, proper water pressure, hot water delivery
• HVAC — System operational, airflow at all registers, thermostat functional, filter accessible
• Appliances — All installed appliances operational per specifications

Cosmetic and Finish Quality

• Drywall — No cracks, nail pops, or visible seams (some settlement cracks are normal but should be documented)
• Paint — Complete coverage, no drips, consistent color
• Flooring — No gaps, squeaks, or damage from construction traffic
• Cabinets — Properly aligned, doors and drawers operate smoothly
• Countertops — Properly sealed, no chips or defects
• Trim and molding — Properly mitered, caulked, finished
• Windows and doors — Operate smoothly, lock properly, weatherstripping intact

Common Builder Defects at Final Walkthrough

These come up again and again:

Phase 3: The 11-Month Warranty Inspection

This is the inspection most homeowners don't know they need — and it's the one that saves them the most money. Most builders provide a one-year warranty on workmanship and materials. At month 11, you inspect everything that's developed since move-in, document it, and give the homeowner a comprehensive warranty claim list.

Why 11 Months?

• The home has been through at least one seasonal cycle — Summer heat, winter cold, spring rain. Systems have been stressed.
• Settlement has occurred — Foundation and framing settle during the first year. Cracks, nail pops, and movement become visible.
• Systems have been operational — Plumbing has been pressurized, HVAC has run through heating and cooling seasons, electrical has been under load.
• The warranty deadline creates urgency — Builders are obligated to address warranty items reported before the one-year mark. After that, it's the homeowner's problem.

What to Check: 11-Month Warranty Checklist

Everything from the final walkthrough checklist, plus:

Settlement-Related Issues

• Drywall cracks — Especially at window and door corners, ceiling-wall joints, and over archways
• Nail pops — Fasteners pushing through drywall from framing shrinkage
• Door and window alignment — Doors that stick, windows that don't lock, gaps that weren't there at move-in
• Floor squeaks — Subfloor movement after drying
• Grout cracks — Tile grout cracking from movement
• Caulking separation — Interior and exterior caulk joints pulling apart

Performance Issues

• HVAC performance — Rooms that don't heat or cool evenly, unusual noises, condensation issues. Check our HVAC inspection checklist.
• Plumbing leaks — Check under all sinks, around tub/shower surrounds, at water heater connections
• Water intrusion — Basement moisture, window leaks, roof leak stains (check attic)
• Drainage problems — Has water ponded near the foundation? Are swales functioning?

Exterior Deterioration

• Concrete cracking — Driveway, walkway, garage floor
• Siding issues — Loose, cracked, or buckling siding panels
• Deck or porch — Connection to house, railing security, board spacing
• Grading changes — Soil settlement that's created negative drainage

How to Document for Warranty Claims

Documentation quality determines whether a warranty claim gets addressed or ignored. Your report is the homeowner's evidence.

Photo Documentation Standards

• Wide shot + close-up for every defect — The wide shot shows location context. The close-up shows the specific defect.
• Include measurements — A tape measure in the frame of grading photos proves slope. A ruler next to a crack shows width.
• Show water staining patterns — Direction, extent, and location of water marks tell a story
• Capture dates — Ensure your report system timestamps photos automatically
• Label clearly — "Northeast corner of garage, where slab meets foundation wall" is useful. "Crack" is not.

Report Writing for Warranty Claims

Your warranty inspection report should:

• Be organized by system — Match the builder's warranty categories
• Distinguish cosmetic from functional — Nail pops are cosmetic. A roof leak is functional. Builders prioritize differently.
• Reference the original warranty document — Quote specific warranty provisions when applicable
• Include a prioritized summary — Give the homeowner a clear list ranked by urgency
• Use objective language — "Negative grading observed, measuring approximately 2 inches of slope toward foundation over a 10-foot run" is actionable. "The grading is bad" is not.

When to Recommend Specialists

Not every finding is within the scope of a general home inspection. Know when to recommend further evaluation:

Recommending specialists isn't a weakness in your inspection — it's a sign of professionalism. You identify the issue. The specialist quantifies and resolves it. Our foundation inspection guide covers when to escalate structural concerns.

Builder Pushback: What to Expect

Builders don't always welcome third-party inspectors. Here's what you'll encounter and how to handle it:

• "Our homes are inspected by the city" — True, but municipal inspections check code minimums at specific milestones. They don't assess overall quality or workmanship.
• "You'll scare the buyer" — A professional inspector provides objective information. That builds confidence, not fear.
• "You can't inspect during construction" — Actually, in most jurisdictions, the buyer has the right to have the property inspected. Check local contract terms.
• "Those are cosmetic issues" — Document everything. Let the homeowner and builder negotiate what gets addressed. Your job is to report, not to arbitrate.

Stay professional. Stick to facts. Document thoroughly. Your relationship is with the homeowner, not the builder.

Pricing New Construction Inspections

New construction inspections typically command premium pricing:

The bundled package is the best value for the homeowner and the best revenue opportunity for you. If you inspect at pre-drywall, you already know the house when you return for the warranty inspection. Your documentation is more comprehensive and your findings carry more weight.

Building Your New Construction Practice

Target Builders and Developments

• Identify active builders in your market and their current developments
• Monitor new construction permit activity through your local building department
• Visit model homes and introduce yourself to sales staff (they often recommend inspectors to buyers)

Market to Buyers Directly

• Create content about new construction defects for your website and social media
• Partner with real estate agents who specialize in new construction
• Offer educational seminars or webinars about what new home buyers should know

Develop a Niche

Inspectors who become known for new construction expertise get steady referral streams. The word spreads among real estate agents: "Use [your name] for new construction — they know what to look for."

Streamline Your New Construction Workflow

New construction inspections generate extensive documentation — often more than resale inspections because you're creating a baseline record of the entire property. Dictating findings in real-time as you walk the property beats stopping to type at every defect.

ReportWalk lets you capture observations by voice on your iPhone, converting your spoken findings into structured report content as you move through the inspection. When you're documenting 50+ items during an 11-month warranty walkthrough, voice-first reporting keeps you efficient and thorough without slowing your pace.

New construction inspection is one of the most valuable services you can add to your practice. The work is consistent (builders keep building), the fees are strong, and the client relationships last. Get good at it, document thoroughly, and let your reports speak for themselves.