A brand-new house can still have dozens of defects — missing flashing, unsealed penetrations, rough-in errors, and cosmetic damage are routine in new construction. Municipal code inspectors check minimum life-safety standards, and the builder's representative works for the builder, not you. An independent inspection in three phases — pre-drywall, final/pre-closing, and the 11-month warranty visit — is how you catch problems while the builder is still obligated to fix them.

Why a new home needs an independent inspector

Three parties touch a new build before you move in, and none of them is your advocate. The municipal or county building inspector verifies code minimums — structural, electrical, plumbing, and fire safety at a handful of milestone visits — but "meets code" is a floor, not a ceiling, and code inspectors spend minutes per trade, not hours. The builder's superintendent or customer-care rep works for the builder; their job is to close homes, not to hunt defects. Your own inspector works only for you, documents everything in writing with photos, and gives you the punch list that becomes the builder's to-do list.

New homes fail in predictable ways: trades rushing to meet schedules, details missed behind drywall, and cosmetic damage from the final months of construction traffic. The three-phase inspection schedule exists because each phase catches what the next one hides.

Phase 1: Pre-drywall inspection (before the walls close)

This is the highest-value phase. Once drywall goes up, framing errors, rough plumbing, and rough electrical disappear for the life of the house — or until they cause damage. The pre-drywall inspection happens after framing, roofing, window installation, and the plumbing/electrical/HVAC rough-ins are complete, but before insulation and drywall.

Typical pre-drywall findings include:

  • Framing issues: missing or misplaced studs, improperly notched or bored joists, missing fire blocking, and unprotected top-plate penetrations.
  • Plumbing rough-in: unsecured or improperly sloped drain lines, missing nail plates where pipes pass through studs (a future drywall-screw puncture waiting to happen), and unsealed tub/shower drain connections.
  • Electrical rough-in: missing junction box covers, wires run without proper protection through framing, and circuits that don't match the panel schedule.
  • HVAC rough-in: crushed or disconnected flex duct, ducts run through unconditioned space without insulation, and missing return-air pathways.
  • Envelope and flashing: incomplete house wrap, unsealed penetrations for vents and hose bibs, and window flashing that skips the sill pan — the source of a large share of new-home water intrusion.

Typical cost: $300–$600 depending on home size and market. Schedule it the moment your builder confirms the rough-in milestone is complete — this window is often only a few days, and once drywall starts, it's gone.

Phase 2: Final / pre-closing inspection

Done when the home is substantially complete — typically a few days before closing, after final cleaning. This inspection looks like a standard general inspection plus new-construction specifics: it covers everything from the home-inspection-101 checklist, with extra attention to finish quality and builder punch-list items.

Common final-phase findings:

  • Grading and drainage that slopes toward the foundation or leaves low spots against the slab.
  • Missing or incomplete caulking and sealant at windows, doors, and exterior penetrations.
  • Paint, drywall, and trim defects — nail pops, tape seams, dings from construction traffic.
  • Appliances not fully connected or tested; GFCI/AFCI protection missing or non-functional.
  • Garage door safety reverse not set; attic access missing insulation cover or weatherstripping.
  • Landscape irrigation spraying the house or pooling at the foundation.

The deliverable is a written punch list you hand to the builder before closing. Get the builder's written commitment — which items will be fixed, and by when — before you sign closing documents. Anything not in writing tends to become your problem after the keys change hands.

Typical cost: $300–$600, roughly the price of a standard resale inspection for a comparable home.

Phase 3: The 11-month warranty inspection

Most builder warranties run one year on workmanship and materials (structural warranties often run longer, typically up to 10 years through a third-party warranty company). The 11-month inspection — scheduled just before the one-year workmanship warranty expires — catches everything that developed during the home's first year of settling and seasonal cycling.

First-year findings inspectors commonly document:

  • Nail pops and drywall cracks from framing shrinkage and settlement — cosmetic but covered.
  • Caulk and grout failures at tubs, showers, windows, and exterior trim.
  • Doors and windows that no longer latch as the frame settled.
  • Concrete cracks in driveways, walkways, and garage floors beyond normal hairlines.
  • HVAC performance issues that only show up across a full summer and winter — weak airflow, condensate problems, rooms that won't hold temperature.
  • Roof and flashing leaks revealed by the first full rainy season.
  • Grading settlement that created new low spots against the foundation.

Submit the report to the builder's warranty department in writing before the 12-month mark, and keep copies of everything with dates. Typical cost: $300–$600. Miss the deadline and workmanship items become out-of-pocket.

Getting builder cooperation and documenting the warranty period

Most production builders accept third-party inspectors — it is your home and your contract right — but cooperation varies. Practical steps:

  1. Notify the builder in writing that you'll have an independent inspector at each phase. Put it in the purchase contract if you can; at minimum, email the sales agent and superintendent so there's a record.
  2. Get site access in writing for the pre-drywall visit specifically — this is the phase builders are most likely to resist, because it slows the schedule. A short email confirmation with a date is enough.
  3. Share the report, not just complaints. Send the inspector's written report to the superintendent and warranty contact. Specific, photo-documented items get fixed; vague verbal complaints get forgotten.
  4. Keep your own log. From move-in day, note every defect you spot with a date and photo — sticky notes on the wall during the 11th month are a classic for a reason. Cross-reference your log against the 11-month inspection report before submitting the warranty claim.
  5. Confirm completion in writing. When the builder says an item is fixed, verify it yourself and get the sign-off documented. Re-inspection of corrected items ($150–$300 for a return visit) is money well spent on structural, roofing, or water-intrusion items.

What this guide does not cover — and when to hire a professional

This guide covers the standard three-phase private inspection program. It does not cover code-compliance disputes (a code consultant or attorney, not a home inspector, argues code interpretation with a building department), structural engineering analysis (if any phase reveals foundation movement, sagging, or major framing defects, a licensed structural engineer at $300–$600 writes the evaluation), or warranty litigation — if a builder refuses legitimate warranty claims, that's a construction-defect attorney's territory, and your dated reports and correspondence log are the evidence. Also note: some states limit what a home inspector can opine on for new construction; your inspector will tell you where their license draws the line.

Frequently asked questions

Won't the county inspector catch all of this?

No. Municipal inspectors verify code minimums at a few quick visits — they check that the structure won't fall down and the wiring won't start a fire, not that the flashing is detailed correctly or the ducts are sealed. Most new-home defect lists are full of items that pass code but fail quality, and code inspectors never test finish systems at all.

What does the three-phase program cost in total?

Budget roughly $900–$1,800 total for all three phases ($300–$600 each) on a typical single-family home. Compared against the cost of one hidden defect — a shower pan leak behind tile can run $3,000–$8,000 to repair — it's the cheapest insurance in the transaction.

Can the builder refuse to let my inspector on site?

For the pre-drywall phase, access is the friction point — the builder controls the job site. Most builders allow it when asked in writing, and many purchase contracts explicitly permit buyer inspections. If a builder flatly refuses all third-party inspections, treat that as information about the builder, not about the inspections.

What if problems show up after the one-year warranty expires?

Workmanship coverage typically ends at 12 months, but structural warranties (often 10 years through a third-party provider) cover major structural defects much longer, and major systems like the roof carry manufacturer warranties. Document everything in writing during year one — a defect reported at month 11 and ignored by the builder is far easier to pursue than one first mentioned at month 14.

Do I need all three phases, or is the final inspection enough?

If budget forces a choice, the pre-drywall inspection catches the defects that can never be seen again — it's the one you can't replicate later. The final inspection is the standard must-have. The 11-month visit is the warranty play. All three together is the complete program; any two beats any one.