The Complete New Home Inspection Walkthrough Guide

Many first-time homebuyers assume that buying a new build means everything is perfect. After all, the house was just constructed -- what could possibly be wrong? The reality is far more nuanced. Studies consistently show that new construction homes often have just as many issues as resale properties, sometimes more. Rushed timelines, subcontractor miscommunication, and the sheer complexity of modern home building mean defects slip through.

A thorough new home inspection is your last line of defense before closing day. It's the one opportunity you have to walk every room, test every system, and flag problems while the builder is still contractually obligated to fix them. Skipping this step can mean inheriting thousands of dollars in hidden repairs.

Common issues found in new builds include improperly graded lots (leading to water pooling at the foundation), missing insulation in walls or attic spaces, reversed hot/cold plumbing lines, unsealed window flashing, and cosmetic damage from the construction process itself. Each of these can escalate into expensive problems if not caught early.

A successful home walkthrough checklist starts before you ever set foot in the house. Preparation turns a casual walk-through into a systematic, thorough inspection.

Bring the Right Tools

• A phone or tablet with Close List installed -- you'll use it to upload floor plans, drop markers on problem areas, and attach photos of each issue in real time.
• A flashlight -- attics, crawl spaces, and cabinet interiors are poorly lit even in brand-new homes.
• A small level -- useful for checking countertops, window sills, and floors.
• Blue painter's tape -- the classic trick for flagging cosmetic issues on walls, trim, and cabinets so you can photograph them later.
• Your contract and spec sheet -- know what was promised so you can verify everything was delivered.

Set Expectations with the Builder

Schedule at least two to three hours for your walkthrough. Let the builder's representative know in advance that you plan to be thorough. A reputable builder will welcome this -- it's in their interest to fix punch-list items before closing rather than dealing with warranty claims later.

Start your new home inspection from the outside. The exterior tells you a lot about the overall quality of construction and can reveal issues that are invisible from indoors.

Foundation

Walk the entire perimeter and look for cracks in the foundation. Hairline cracks are common and usually cosmetic in new concrete, but anything wider than 1/4 inch or cracks that show vertical displacement are red flags. Check that the foundation is clean and free of mortar droppings or construction debris.

Grading and Drainage

The ground around the house should slope away from the foundation at a grade of at least 6 inches over the first 10 feet. Poor grading is one of the most common construction defects and can lead to water intrusion, basement flooding, and long-term structural damage. Look for standing water or erosion channels near the foundation.

Roof and Gutters

If possible, visually inspect the roof from the ground using binoculars. Look for missing or misaligned shingles, exposed flashing around vents and chimneys, and gutters that are already pulling away from the fascia. Downspouts should direct water at least 4 feet from the foundation.

Exterior Walls and Siding

Check for consistent caulking around windows and doors. Look for gaps in siding joints, paint overspray, and dents or scratches from construction equipment. Examine any brick or stone veneer for proper mortar joints and weep holes at the base.

Structural issues are the most serious -- and most expensive -- category of construction defects. While major structural failures are rare in new builds, subtler problems are surprisingly common.

Floors

Walk every room slowly. Squeaky floors in a new home may indicate improperly fastened subfloor. Use a marble or small ball to check for noticeable slopes -- some settling is normal, but significant slopes suggest framing or foundation problems. Check transitions between different flooring materials for level alignment.

Walls and Ceilings

Look for drywall cracks at corners, above door frames, and along ceiling seams. While settling cracks are common in new construction, diagonal cracks that follow stair-step patterns or cracks that appear at load-bearing walls deserve professional evaluation. Run your hand along walls to feel for nail pops -- bumps where drywall screws are pushing through the surface.

Doors and Alignment

Open and close every interior door. Doors that swing open or closed on their own, stick at the frame, or have uneven gaps around the edges can indicate framing that's out of square. This is one of the earliest and most visible signs of structural shifting.

Plumbing problems are among the most frequently discovered issues during a new home inspection walkthrough. Even in brand-new homes, leaks, low pressure, and improper installations are common.

Run Every Faucet

Turn on every faucet in the house -- kitchen, bathrooms, laundry, and utility sinks. Check for consistent water pressure and verify that hot and cold lines aren't reversed (this happens more than you'd think). Let the water run for at least 30 seconds and look under the sink for any drips at supply connections or drain joints.

Flush Every Toilet

Flush each toilet multiple times. Watch for slow draining, running water after the tank fills, and wobbling at the base. Check the caulk seal where the toilet meets the floor -- a missing seal can allow sewer gases to leak and makes cleaning more difficult.

Check for Leaks

Open every cabinet under every sink and inspect for water stains, dampness, or mold. Look at ceiling surfaces below upstairs bathrooms for discoloration. Turn on the dishwasher and washing machine (if installed) and check their drain connections for leaks during the cycle.

Water Heater

Verify the water heater is the correct size for your home (a common issue in spec homes where the builder may have installed a unit that's too small). Check for proper venting, a temperature and pressure relief valve, and that the drain pan is connected.

Electrical issues in new construction can range from minor annoyances to serious safety hazards. A methodical check of the electrical system is essential.

Test Every Outlet

Bring an inexpensive outlet tester (available at any hardware store for under $15). Plug it into every outlet in every room. It will immediately tell you if the outlet is wired correctly, has a missing ground, or has reversed polarity. Dead outlets are common and usually mean a wire came loose during construction.

GFCI Outlets

Building codes require GFCI (Ground Fault Circuit Interrupter) outlets in kitchens, bathrooms, garages, laundry rooms, and any exterior locations. Press the test button on each GFCI outlet -- it should click and cut power. Press reset to restore it. If a GFCI doesn't trip when tested, it's not providing the safety protection it's designed for.

Electrical Panel

Open the main electrical panel. Every breaker should be clearly labeled. Look for double-tapped breakers (two wires connected to a single breaker terminal), which are a code violation. Check that the panel is neat and organized -- messy wiring inside the panel often indicates hasty work throughout the house.

Light Fixtures and Switches

Turn on every light. Flip every switch. Test every dimmer. Check that three-way switches (the ones that control a light from two different locations) both work. Look for flickering lights, which can indicate loose connections.

The heating, ventilation, and air conditioning system is one of the most expensive components in your new home. Verifying it works properly during your walkthrough can save you thousands.

Test Heating and Cooling

Even if it's a mild day, run both the heating and cooling systems. Let each run for at least 15 minutes. Walk through every room and hold your hand near every supply vent to confirm airflow. Rooms that are significantly warmer or cooler than others may have disconnected or crushed ductwork -- a common issue when ducts are run through tight spaces.

Thermostat

Verify the thermostat is level, responsive, and programmed correctly. Smart thermostats should be connected to Wi-Fi and functioning. Check that the temperature displayed is reasonable for the conditions.

Exhaust Fans

Turn on every bathroom exhaust fan and the kitchen range hood. Hold a tissue near the fan -- it should be pulled toward the fan if it's working properly. Exhaust fans that vent into the attic instead of outdoors are a code violation that leads to moisture damage and mold.

Doors and windows are the primary interface between your home's interior and the elements. Proper installation is critical for energy efficiency, security, and comfort.

Windows

Open and close every window. They should slide smoothly, lock securely, and seal tightly. Look for condensation between double-pane glass (which indicates a broken seal), gaps in caulking around the frame, and screens that don't fit properly. Check that all window locks engage.

Exterior Doors

Every exterior door should close flush against the weather stripping with no visible light gaps around the edges. Deadbolts and handle locks should operate smoothly. Sliding glass doors should glide easily on their tracks with no sticking.

Insulation

If you have access to the attic, check that insulation is evenly distributed and at the depth specified in your contract. Look for gaps around light fixtures, plumbing penetrations, and ductwork. Missing or inadequate insulation is one of the most common new construction defects and directly impacts your energy bills.

While cosmetic issues aren't structural, they reflect the overall quality of workmanship and are the easiest items to get fixed on a punch list before closing.

Paint

Examine walls in natural light. Look for uneven coverage, drips, overspray on trim or ceilings, and missed spots. Check that colors match between walls in the same room -- different paint batches can have subtle variations.

Cabinetry and Countertops

Open and close every cabinet door and drawer. They should align properly and close fully without catching. Inspect countertop surfaces for chips, scratches, and uneven seams. Check that backsplash caulk lines are clean and consistent.

Flooring

Walk every inch of flooring. For hardwood, look for scratches, gaps between planks, and squeaks. For tile, check for cracked or hollow-sounding tiles (tap them gently -- a hollow sound indicates poor adhesion). For carpet, look for seam visibility, wrinkles, and consistent pile direction.

Trim and Molding

Inspect baseboards, crown molding, and window casings for gaps, nail holes that weren't filled, and joints that don't meet flush. These details matter -- they indicate whether the finish carpenters were careful or rushed.

Finding problems is only half the battle. You need a clear, organized record of every issue to ensure the builder addresses them all before closing. This is where most homebuyers fall short -- scribbled notes on paper get lost, and photos without context are hard to interpret weeks later.

The Modern Approach: Digital Floor Plan Mapping

Instead of a paper checklist, use a tool like Close List to upload your home's floor plan and drop markers directly on the exact location of each issue. Attach photos and severity ratings to every marker. For multi-story homes, use separate floor plans for each level so nothing gets lost.

What to Capture for Each Issue

• Exact location -- room, wall, and position (e.g., "Kitchen, east wall, 3 feet from corner")
• Photo evidence -- close-up of the issue plus a wider context shot showing where it is in the room
• Severity -- is it cosmetic, functional, or a safety concern?
• Description -- what you see and why it matters

Share the Report

Once your walkthrough is complete, generate a shareable link with your full punch list. Send it to the builder, your real estate agent, and keep a copy for your records. Having everything documented with photos and precise locations makes it nearly impossible for items to be "forgotten."