Renovation acceptance is your last chance to catch quality issues. It's a major hassle to discover problems after the renovation crew has left. This guide teaches you how to systematically inspect a new home and renovation quality.

How to Inspect a Renovated Home? A Complete Guide to Avoiding Pitfalls in New Home Handover and Renovation Acceptance

1. Differences Between Handover Acceptance and Renovation Acceptance

Handover Acceptance (Developer Delivery)

Inspection when receiving a new home from the developer:

Structural integrity of the building
Waterproofing
Electrical and plumbing provisions
Door and window quality

Important: Issues must be raised before signing. After signing, the developer's liability decreases.

Renovation Acceptance (Renovation Company Delivery)

Inspection when receiving the home from the renovation company after work is complete:

Workmanship quality for each trade
Whether materials match the contract
Whether construction meets standards

Most Important Principle: Inspect as work progresses, don't wait until everything is finished.

2. Handover Acceptance Checklist

Structural Inspection

Walls:

Hollow sound detection: Tap the wall lightly with a solid metal rod. A hollow sound = hollow area (internal delamination).
Cracks: Pay special attention to corners of doors and windows, and beam-column junctions (these areas have stress concentration).
Diagonal cracks: May be settlement cracks. Monitor the width (>0.5mm requires attention).
Horizontal/vertical hairline cracks: Usually shrinkage cracks, relatively normal.

Floors:

Also check for hollow areas by tapping with a rod.
Floor flatness (difference should not exceed 5mm over 2 meters).
No large-area cracks.

Ceilings:

Any water stains (signs of leakage).
Any cracks.

Waterproofing Inspection

Key Areas: Bathroom, kitchen, balcony

Water Ponding Test:

Block the floor drain in the bathroom/kitchen.
Fill with water to a height of 5cm.
Wait 24-48 hours.
Check with the downstairs neighbor for any leakage.

Prerequisite: This test must be done before renovation. Fixing waterproofing issues after renovation is extremely costly.

Electrical and Plumbing Inspection

Water Supply:

Turn on all faucets, check water pressure.
Check water quality (temporary cloudiness is acceptable, persistent cloudiness is not).

Drainage:

Floor drains drain smoothly (pour water to test).
Toilet flushes properly.

Gas:

No odor when the gas valve is closed.
Gas meter displays normally.

Electrical:

Test all light switches.
Test all outlets (use an outlet tester or phone charger).
Check for dedicated circuits for high-power appliances like air conditioners, water heaters, and bathroom heaters.

Door and Window Inspection

Doors:

Open and close smoothly without sticking.
Even gaps (consistent clearance around the door frame).
No looseness in the lock or hinges.
Test the anti-pry feature of the security door.

Windows:

Open and close smoothly.
Weatherstripping seals properly (no drafts).
Glass sealant is intact, no peeling.
No deformation of the aluminum alloy frame.

3. Phased Renovation Acceptance

Phase 1: Electrical and Plumbing Acceptance (After Chasing, Before Sealing)

This is the most important concealed work inspection.

Electrical Acceptance:

Separate conduits for high and low voltage (maintain a distance of at least 15cm between high and low voltage lines).
Switch and outlet routing is logical (straight and level for easy future tracing).
Circuit labeling (each breaker in the distribution box should be labeled with its corresponding area).
Test the power status of every outlet with a phase tester during acceptance.
Critical: Take photos for records, documenting the routing of every wire (impossible to see after walls are sealed).

Plumbing Acceptance:

Color-coded hot and cold water pipes (usually blue for cold, red for hot).
Water pipe pressure test:
- Pressurize the system to 0.8 MPa.
- Maintain pressure for 30 minutes.
- A pressure drop of no more than 0.05 MPa is acceptable.

Phase Acceptance Requirements:

Photograph all pipe and wire routing.
Request plumbing and electrical diagrams from the renovation company.

Phase 2: Masonry Acceptance (After Tiling, Before Painting)

Tile Installation:

Hollow sound detection (same tapping method).
Level check (use a spirit level, tolerance ≤ 3mm over 2 meters).
Aligned grout lines (visual inspection).
External corner finishing (edge treatment).

Floor Drain Placement:

Proper slope towards the floor drain (drainage direction).
No areas where water can pool.

Waterproofing:

Bathroom waterproofing acceptance (wall waterproofing height at least 1.8m, shower area 2.0m or more).

Phase 3: Carpentry Acceptance

Cabinets, Door Frames, Window Frames:

Door frames are level and plumb.
Cabinet bodies are flat and free from deformation.
Hinges open and close smoothly.
Even gaps between cabinet panels.

Flooring (if applicable):

Even seams.
No hollow sounds (step on it like checking a carpet; different for floating floors).
Baseboard joint treatment.

Phase 4: Paint Acceptance

Wall Paint:

Even color, no color variation.
No brush marks.
No blistering (blistering usually indicates a damp substrate or uncured putty).
Check smoothness by touch (should be relatively smooth after putty application).

Internal and External Corners:

Internal corners (wall-to-wall angle): Uniform and straight.
External corners (protruding angle): Straight (check with a straightedge).

Phase 5: Final Acceptance Summary

Post-Completion Checklist:

All lights function at normal brightness.
All switches and outlets function correctly.
No leaks from faucets.
Floor drains drain smoothly.
Doors and windows open and close smoothly.
Any renovation odors (VOCs).

4. Common Acceptance Tools

Tool	Purpose
Hollow sound hammer (solid metal rod)	Detecting hollow areas
Spirit level (2 meters)	Checking level and plumb
Outlet tester	Checking correct outlet wiring
Flashlight	Inspecting corners and details
Tape measure	Measuring dimensions
Lighter / thin paper	Checking window seal (hold paper near the gap to see if it flutters)
Phone camera	Photographing issues for records

Professional Tools Available for Rent:

Laser level (precise level detection)
Pressure gauge (for pressure testing)
Infrared thermometer (detecting pipe leaks)

5. Issue Reporting and Resolution

Methods for Documenting Issues

Take photos (clear, with a scale or finger for reference).
Take videos (for dynamic issues like door gaps, drainage).
Keep written records (location, problem description).
Have the contractor sign to acknowledge (Important! Verbal agreements don't count).

Post-Rectification Acceptance

Re-inspection is mandatory after rectification; don't rely on verbal promises.
Keep a record of the number of times the same issue is rectified.

Payment Milestones and Acceptance

Standard Contract Payment Milestones:

Upon signing contract: 10-20%
After electrical/plumbing completion and acceptance: 30%
After masonry/carpentry completion and acceptance: 30%
After final completion and acceptance: 20%
After warranty period: 10% (final payment)

Core Strategy: Use payment milestones to enforce construction quality.

6. Handling Common Disputes

Construction Quality Disputes

Preserve Evidence:

Contract (including material list, workmanship standards).
Payment records.
Photos of quality issues + date stamp.
Rectification notice (written notification requesting correction).

If Negotiation Fails:

File a complaint with 12315 (consumer protection hotline).
Contact the local housing and construction department (for contractor licensing supervision).
Contact the Consumer Association.
File a lawsuit (with contract and evidence).

Project Delays

The contract should clearly specify:

Completion date.
Daily penalty amount for delays.
Force majeure clauses (agreed upon by both parties).

7. Formaldehyde Testing

Minimum Ventilation Time After Renovation

Newly renovated homes must be ventilated. VOC (Volatile Organic Compound) emission times:

Paint: Main emission period is approximately 2-4 weeks.
MDF (Medium-Density Fiberboard, for cabinets, wardrobes): Continuous emission for approximately 1-3 years.
Flooring adhesive: Main emission period is approximately 1-3 months.

Recommendation: After renovation, ventilate the new home for 3-6 months before moving in (especially for families with elderly or children).

Formaldehyde Testing Methods

Professional Testing: Hire a professional agency (a qualified third party).

Test after closing windows and doors for 12-24 hours.
Standard: Indoor residential ≤ 0.08 mg/m³.

Simple Testing: Commercially available formaldehyde detectors.

Less accurate than professional agencies.
But can be used for daily monitoring.

8. Summary

Most Important Points:

Inspect as work progresses (concealed work is most critical).
Document all issues in writing and get the contractor's signature.
Link payments to acceptance (no acceptance, no payment).
Keep plumbing/electrical diagrams and photos on file.
Ensure adequate ventilation before moving in.

Most Expensive Renovation Lessons:

Discovering a burst pipe only after the wall is sealed.
Finding hollow floor tiles only after handover.
Discovering waterproofing issues only after moving in.

Proactive acceptance is always less effort and cheaper than seeking recourse after the fact.