The New Construction Punch List Every Cabo Buyer Must Complete Before Final Payment

You have waited 18 months for your new condo in Los Cabos. The developer sends photos — it looks gorgeous. The closing coordinator emails you with a date and a wire amount. The temptation is to sign, pay, and pop champagne. Do not. The final walkthrough before your last payment is the single most important hour you will spend on this purchase, and most buyers waste it by not knowing what to look for.

Why the Punch List Is Your Last Point of Leverage

In US new construction, you have state licensing boards, bonding requirements, and a well-established legal framework for construction defect claims. In Mexico, your leverage is simpler and more binary: the developer wants your final payment, and you want a completed unit. The punch list inspection is where those two interests negotiate.

Once you release that final 10–20%, your leverage drops to near zero. Yes, Mexican law provides warranty protections (more on that below), but enforcing those protections after payment requires significantly more time, money, and energy than withholding payment until defects are corrected. This is not cynicism — it is how the business works, and every experienced Cabo buyer knows it.

Step 1: Hire an Independent Inspector

Do not rely solely on your own eyes. An independent construction inspector — not one recommended by the developer — costs $300–$600 USD for a condo inspection and $500–$1,000 for a villa. This person should have:

• Experience inspecting new construction in Los Cabos specifically (coastal construction has unique requirements)
• A thermal imaging camera (detects moisture intrusion behind walls before it becomes visible damage)
• A written report with photos, not just verbal findings
• No financial relationship with the developer, the real estate agent, or the closing company

Ask your Ronival agent for inspector referrals, or check with the AMPI (Asociación Mexicana de Profesionales Inmobiliarios) Los Cabos chapter. A good inspector pays for themselves many times over — I have seen single inspection findings that prevented $15,000–$30,000 in future repair costs.

The Big One: Waterproofing

Waterproofing failures account for 62% of post-delivery warranty claims in Los Cabos developments, based on data I have compiled from buyer cases over the past 5 years. The combination of salt air, hurricane-season humidity, and intense UV exposure means that waterproofing must be exceptional — not just adequate — to survive in this environment.

Check these specific areas:

• Roof membrane: Flat roofs are standard in Cabo construction. The membrane should extend a minimum of 6 inches up any parapet wall. Look for bubbles, wrinkles, or seams that are separating. Run your hand along every seam.
• Terrace/balcony slope: Water must drain away from the building. Place a tennis ball on the terrace floor — it should roll toward the drain, not toward the sliding door. A puddling terrace will eventually drive water under the door threshold.
• Window and door seals: Run water from a hose along the exterior of every window frame for 5 minutes. Have someone inside watching for any water intrusion at the sill, the corners, or the head (top) of the frame. This is the test that catches 80% of window seal failures.
• Shower waterproofing: Turn on the shower, let it run for 15 minutes, then check the ceiling of the unit below (or the adjacent wall if ground floor). Water damage from shower waterproofing failures is the most expensive repair category because it requires demo and rebuild of finished surfaces.
• A/C condensate lines: Verify that condensate drains to an appropriate exterior location, not into a wall cavity or onto a neighbor's terrace. Clogged or incorrectly routed condensate lines are the #2 cause of water damage in Cabo condos.

Tile, Grout, and Finishes

Tile and grout issues appear in 48% of punch lists. Most are cosmetic, but some indicate deeper installation problems:

• Hollow tiles (tap test): Tap every floor tile with a coin or small rubber mallet. A hollow sound means the tile is not fully bonded to the substrate. One or two hollow tiles out of 100 is normal. More than 5% indicates a systemic installation problem that will lead to cracked tiles under foot traffic.
• Grout gaps: Run your finger along every grout line, especially at wall-floor transitions. Missing grout allows water infiltration that undermines the tile bond from below. This is particularly critical in bathrooms and on terraces.
• Lippage: Uneven tile edges (one tile higher than the adjacent one). Minor lippage (<1mm) is acceptable in large-format tile. Anything you can feel with bare feet or that catches a vacuum cleaner is a correction item.
• Countertops: Check for chips, scratches, and uneven seams. Granite and marble countertops should be sealed — pour a drop of water on the surface and wait 5 minutes. If the stone darkens under the water, it was not sealed properly and will stain within months of use.

Plumbing: Test Everything Twice

Plumbing issues appear in 41% of punch lists. The testing protocol:

• Run every fixture simultaneously. Turn on all sinks, showers, and flush all toilets at once. Check for pressure drops. A dramatic pressure loss when multiple fixtures run simultaneously indicates undersized supply lines — a design defect that is expensive to correct post-delivery.
• Hot water test: Turn on the hot water at the farthest fixture from the water heater. Time how long it takes to arrive. Over 60 seconds is a deficiency. Over 90 seconds is a correction item.
• Drain speed: Fill every sink and tub, then release the stopper. Water should drain completely within 30 seconds for a sink, 60 seconds for a tub. Slow drains at delivery indicate installation defects, not buildup.
• Under-sink inspection: Open every vanity and kitchen cabinet. Check supply connections and drain fittings for any moisture. Even a slight dampness indicates a fitting that will fail within weeks of regular use.
• Toilet rock test: Sit on every toilet and shift your weight side to side. Any movement indicates an improperly set wax ring or loose closet bolts. This is a 15-minute fix at delivery and a potential flood event if left uncorrected.

Electrical: Safety First

Electrical deficiencies appear in 33% of punch lists. Some are cosmetic (a crooked cover plate). Some are safety hazards. Test these:

• Every outlet: Bring a plug-in outlet tester ($10 at any hardware store, or buy one at Home Depot in Cabo). This device checks for correct wiring polarity, ground, and GFCI protection. Every bathroom, kitchen, and exterior outlet in Mexico should be GFCI-protected per NOM (Norma Oficial Mexicana) electrical standards.
• Every light switch: Turn each one on and off. Check for loose switches, sparking, or buzzing sounds. A buzzing switch indicates a loose connection that creates a fire risk.
• Breaker panel: Open the panel and check that every breaker is labeled. Confirm that the main breaker amperage matches what the developer specified. Flip each breaker off and on to verify it controls the circuit it is labeled for.
• Ceiling fans: Run each fan on all speeds. Check for wobble, noise, and that the light kit works on both the switch and the pull chain (if applicable). A wobbling ceiling fan at delivery is an improperly balanced or incorrectly mounted unit.

Doors and Windows: The Salt Air Test

Door and window seal failures appear in 29% of punch lists and are critical in a coastal environment where salt air accelerates corrosion:

• Sliding door tracks: Open and close every sliding door 10 times. It should glide smoothly without catching, grinding, or requiring force. Tracks that are difficult at delivery will seize within 6 months from salt corrosion.
• Locking mechanisms: Every lock must engage fully. Partial engagement means the strike plate is misaligned — a 5-minute fix at delivery, a security vulnerability if ignored.
• Weather stripping: Close every door and window, then hold a lit lighter near the seals. Any flame deflection indicates an air gap that also admits water, dust, and insects.
• Screen condition: Every screen should be intact with no tears, proper tension, and secure fastening. Replacement screens for Mexican-spec windows take 2–4 weeks to order.

Documenting the Punch List: How to Create Leverage

A punch list that exists only in conversation has no power. Document it properly:

1. Number every item. "Item 14: Master bathroom shower — tile grout missing at wall-floor transition, north wall, 18 inches from corner." Specificity prevents the developer from "fixing" the wrong thing.
2. Photograph every item. Include a wide shot showing the location and a close-up showing the defect. A timestamped photo is your evidence if the developer disputes a finding.
3. Get the developer's signature. Both parties sign the punch list at the end of the inspection, acknowledging the findings and agreeing to a correction timeline. No signature = no commitment.
4. Set a correction deadline. Standard practice: 30 days for cosmetic items, 60 days for mechanical/plumbing/electrical. Include this timeline in the signed document.
5. Withhold final payment until critical items are resolved. Cosmetic items can close with a holdback arrangement. Safety items (electrical, waterproofing, structural) must be corrected before final payment. Period.

Your Warranty Rights Under Mexican Law

Mexico's construction warranty framework, covered in our warranty guide, provides these protections:

• 12-month warranty for hidden defects (vicios ocultos) — defects that could not have been detected at delivery
• 5-year warranty for structural defects under the Federal Civil Code
• Developer liability for defects that were concealed or misrepresented at delivery

But here is the practical reality: enforcing these warranties post-payment requires legal action in Mexican courts, which costs $3,000–$10,000+ in legal fees and takes 6–18 months. That is why the punch list — your pre-payment leverage — is so critical. Every item you catch and correct before payment is an item you never need to litigate.