The final walkthrough is the moment that decides everything. Sign without a punch list and you've effectively accepted the work as-is. Sign with a thorough punch list and you keep leverage to get every defect fixed under the existing contract. Here are the 12 things to inspect before you put your name on the certificate of substantial completion.
What “substantial completion” means legally
Substantial completion is the legal moment when:
- Your warranty period starts — typically 12 months on workmanship, longer on materials per manufacturer specs.
- Final payment becomes due (minus retainage if you negotiated one).
- Risk of loss transfers to you — your homeowner's insurance covers the work going forward, not the contractor's builder's risk.
- Mechanic's lien clock starts. In most states, subcontractors have 60-90 days to file a lien for unpaid amounts. Get lien waivers before final payment.
The 12-point inspection
1. Scope vs contract
Walk the contract line by line. Every line item delivered? Right materials, right brand, right model number? Any substitutions documented with a signed change order? Don't skip this — it catches half of all punch-list issues.
2. Water tightness
Bathrooms: pour a cup of water at the base of the shower. Should drain, not pool. Check the ceiling below for any signs of dampness. Kitchens: run every faucet, fill the sink, open the dishwasher mid-cycle. Caulk lines should be uniform — no gaps, no air bubbles.
3. Plumbing pressure and drainage
Run every fixture simultaneously. Pressure should hold. Hot water should reach all fixtures in a reasonable time. No hammer (banging in pipes when valves close). Drains should empty quickly without gurgling — gurgling means a vent issue.
4. Electrical: outlets, switches, panel
Buy a $10 plug tester from Home Depot. Test every outlet — proper polarity, ground confirmed, GFCI trip working in kitchens and baths. Test every switch including three-ways from both ends. Panel should be properly labeled, AFCI/GFCI where code requires.
5. Tile and flooring: alignment and flatness
Lay a 6-foot straight edge across floors. More than 1/4" of deflection is a defect. Tile grout lines should be uniform. Tap each tile lightly — hollow sounds mean inadequate adhesive coverage. Hardwood: no creaks, expansion gaps at perimeter covered by trim.
6. Paint finish (under raking light)
Walk every room with a flashlight held parallel to the wall. This raking light reveals roller marks, drips, missed spots, and undercoating bleeding through. Trim edges should be crisp; ceiling lines should be straight. Painter's tape pulled cleanly without lifting paint underneath.
7. Windows, doors, hardware
Open and close every door and window. No binding, no rubbing. Hardware operates smoothly. Latches catch. Weatherstripping in place. Glazing clean and unmarred. Locks engage smoothly. If the contractor installed new windows, screens should be included and fit.
8. HVAC and ventilation
Turn on heat then cool. Air at every register, no whistling or rattling ducts. Thermostat operates the system. Bathroom exhaust fans pull a sheet of toilet paper to the grille (a quick airflow test). Range hood at high pulls a steady visible draft. Check the air filter is new.
9. Cabinetry and fixtures: alignment + secure mounting
Cabinet doors aligned, hinges adjusted, drawers track smoothly, all bumpers in place. Wall-hung items (vanity, shelves, wall-mount TV brackets if installed) should not flex when loaded. Toe-kicks and crown molding mitered cleanly.
10. Cleanup and trash
“Broom clean” is the standard delivery state per the AIA contract and most residential contracts. All construction debris hauled, drywall dust vacuumed, protective coverings removed, fingerprints off light switches, paint splatters off windows and floors. Yard cleared of any material.
11. Documents you need to leave with
- Certificate of substantial completion signed by both parties.
- Lien waivers from the general and every named subcontractor.
- Manufacturer warranties and registration cards for appliances, HVAC, windows, roofing.
- Inspection passes for permits — final electrical, plumbing, mechanical, building.
- As-built drawings if any plumbing or electrical was rerouted from the plans.
- Operator's manuals for new equipment.
- Itemized final invoice showing payments to date and any remaining balance.
12. The punch list and walk-back
Two outcomes: walk it with no punch list (rare — and a good sign you weren't thorough) or with a written list of items the contractor needs to fix within an agreed window (typically 14-30 days). Photograph each item, number it, both parties initial the list.
Substantial completion can still be declared with an open punch list — what matters is that the work is usable for its intended purpose. The punch list items get held against the final payment or, more commonly, the retainage.
Retainage: the 5-10% you should hold
Retainage (sometimes called holdback) is an industry-standard practice: you withhold 5-10% of the contract value until substantial completion + the punch list is closed. Protects you from a contractor walking away with the punch unfinished.
- Negotiate it before signing. Most contractors will accept 5%; some push back at 10%.
- Released after punch is closed — typically 30-90 days post-completion.
- Document the release in writing. Both parties sign a punch-list closeout confirming all items addressed.
Lien waivers: don't skip them
Even with the punch list closed, a subcontractor or supplier the general didn't pay can still file a mechanic's lien against your property. Two types of waiver to demand:
- Conditional waiver: waives lien rights upon receipt of a specific payment. Use these with progress payments.
- Unconditional waiver: waives lien rights regardless of payment status. Demand from every named sub and supplier at substantial completion before releasing retainage.
The warranty year — use it
Most workmanship warranties are 12 months from substantial completion. Around month 10, do a second walkthrough:
- Seasonal cycle reveals issues: a full winter and a full summer expose flooring movement, settling cracks, HVAC tuning problems.
- Email or letter the contractor with the list, before warranty expiration.
- Most legitimate contractors will come back to address warranty items. The few who won't are the few you needed retainage for.
Don't do this
- Don't sign “to be done” items as if they're complete. Either it's done or it's on the punch list.
- Don't release final payment before the punch list is closed and lien waivers received.
- Don't move in before substantial completion — moving in can imply acceptance in some jurisdictions, even if the work isn't finished.
- Don't take the contractor's word on permit closeout. Get the city's inspector signoff documents in your hand.
Contractors using Kwotly track scope, change orders, and substantial-completion documentation on the same signed quote page, so the punch list and warranty timeline are part of the record from day one.
Most disputes after a remodel trace back to a sloppy final walkthrough. An hour of careful inspection with this checklist in hand prevents months of finger-pointing. Take your time. The contract gives you the leverage; the walkthrough is when you cash it in.