House Inspection Before Handover in Thailand: Full Checklist

Why the Pre-Handover Inspection Is the One Stage Not to Rush

The inspection before handover is the only moment when you still hold the final payment and the contractor still has crews on site. Anything you find now gets fixed quickly. Anything that slips past becomes a matter of phone calls, scheduling and waiting for a crew to be free, which can easily run into weeks.

For a house built in Korat or Roi Et by an owner who lives in Bangkok or overseas, this day matters even more, because the chance to be on site with the full team present does not come often. Allow at least half a day and preferably a full day, and do not inspect on the same day as the transfer or the final payment. Foreigners generally cannot own land in Thailand, so overseas owners usually hold the plot through a long lease or another lawful arrangement, and that paperwork should be settled with a lawyer well before inspection day.

Take simple equipment with you: a torch, a spirit level, a ball or a marble for checking floor falls, a voltage-testing screwdriver, coloured tape for marking the places where you find problems, and a phone for photographing every point with the date attached.

Structure, Roof and Leaks Come Before Anything Else

Start by walking around the house, outside and in, looking for cracks. Hairline cracks in the render are normal in a new house, but diagonal cracks at door and window corners, cracks on columns or beams, and cracks that step through the mortar joints should be explained in writing by the contractor’s engineer before you accept the house.

Check the roof in two ways. First, go up through the service hatch and look from inside the roof space for daylight coming through or water staining on the insulation or the ceiling. Second, test it with water: ask the crew to run water over the roof continuously for at least fifteen to thirty minutes, concentrating on the gutters, the valleys and the junctions with walls, then watch the ceiling below for damp patches or drips.

If you are inspecting during the Isan rainy season, treat it as an opportunity. Schedule the visit for the day after heavy rain and look for staining on ceilings, window reveals and balcony floors. Most water ingress shows itself most clearly under real conditions.

Floors, Walls, Doors and Windows: Room by Room, Nothing Skipped

Tap tiled floors in a grid pattern with a coin or the handle of a screwdriver and listen for a hollow sound, which means the adhesive underneath the tile is incomplete. Hollow tiles crack later under load or when furniture is dragged across them. In bathrooms and on balconies, pour water on the floor and see whether it runs to the drain or ponds in a hollow. Ponding water is the hardest defect to fix once you have moved in.

Look at walls in raking light. A torch held parallel to the surface reveals waves in the render, filler that was never flattened, and paint applied unevenly. Pay particular attention to the corners of rooms and the edges of door and window frames, because those are the places where crews most often finish in a hurry.

Every door and window should open and close smoothly, lock properly, and show no light around the edges when shut. On sliding units, check that the track drains and does not hold water. On swing doors, check that they do not sit off plumb and drift open or closed on their own. The silicone around each frame must be continuous with no gaps, because it is the main line of defence against water in the rainy season.

Electrical and Plumbing Systems: Test Everything for Real

Test every socket with a voltage tester or a plug-in tester, operate every switch to confirm it controls the light shown on the drawings, and open the consumer unit to check that each breaker is labelled with the circuit it serves. Ask about the earth connection and the residual current device, both of which every new house should have, and have the technician press the test button in front of you.

For the plumbing, ask for the pressure test results taken before the walls were closed up. If there are none, open every tap at once and see whether the flow holds up, run the hot water to confirm it reaches every point that was agreed, and flush every toilet to check that it clears quickly with no noise of trapped air. Then open the cabinets under the basins and the kitchen sink and check that every joint is completely dry.

Do not forget the pump and the storage tank. Check that the pump cuts in and out by itself as taps are opened and closed and does not cycle unusually often, and that the tank has a proper lid and a float valve that really does stop the flow. Many houses outside the piped supply area in Roi Et run on a borehole, so ask to see the well position, the filter system and the main shut-off valve.

External Works, Septic System, Fencing and the Documents You Must Receive

Walk around the house and confirm that the ground falls away from the building rather than towards it, because water running back to the foundations is the cause of damp in ground-floor walls and of soil settling alongside the house. For the septic and holding tanks, check the position of the covers, the vent pipe, and the connection out to the public drain or to a soakaway. If it discharges to a soakaway, ask whether the distance from the water well was properly calculated.

Fences, gates and gate motors should be run open and closed several times, checking that the track is free of mortar debris and that the gate does not scrape the ground. On the driveway and the parking area, check that no water stands after the surface is wetted and that the concrete joints have expansion gaps at the correct spacing.

The documents to receive before the transfer are the as-built drawings reflecting what was actually constructed, the original building permit, warranty certificates for workmanship and materials with clear start dates, manuals for any appliances installed with the house, and a schedule of the brands and paint colours used so that future repairs can be matched. The OBILIS team supplies this document set together with an inspection checklist that owners can walk through point by point, because a house inspected thoroughly today is a house you do not spend the next year chasing.

To get a rough budget before you talk to anyone, try our house price calculator, or contact the OBILIS team to talk through your plot.

Building the Defect List, and Whether to Hire an Independent Inspector

Mark every defect you find with coloured tape, photograph it, and record it on a single list giving the room, the exact location, the symptom and the date. Have the contractor sign the list as received, with an agreed date for completion. Do not settle anything verbally, because a signed list is the only evidence that stands up if there is a dispute later.

The retention or final instalment, which is typically around five to ten per cent of the construction cost, should be paid after a re-inspection confirms that the defect list has genuinely been closed, not paid in advance and then waited on. If the contract says payment falls due on handover, define handover as the point at which the defect list is complete, and write it that way when you sign.

Hiring an engineer or an independent house inspector costs little against the price of the house and is well worth it for anyone short of time or unsure about technical detail. An independent inspector brings a thermal camera for finding damp inside walls, a moisture meter, and the experience to know where problems usually hide. For a house built upcountry by an owner living far away, this is a cost worth putting in the budget from the start.

Related reading: Construction Warranty in Thailand: How Long and What It Covers and Construction Payment Schedules in Thailand: A Safe Split

Frequently Asked Questions

How long should a house inspection take?

For a house of 150 to 250 square metres, allow at least half a day. Including a roof water test and a full test of the systems, it can take a whole day. Do not let the contractor hurry you along, and keep the inspection day separate from the transfer day.

What if I find a problem after the transfer has gone through?

Report it in writing with photographs and the date, through the channel named in the contract. Most issues are still inside the one-year general workmanship warranty, and structural cover runs considerably longer. A documented report gets a faster response than a phone call describing the problem.

What if the contractor refuses to fix items on the list?

Hold the final payment and refer to the list they signed as received. If that produces nothing, issue a formal written notice under the terms of the contract, and consult a lawyer before hiring another builder to carry out the work, because repairing it yourself before giving notice may forfeit your claim.