Condo Inspection Before Transfer: A Room-by-Room Checklist, Tools, and How to Handle Defects
ทีม TalataReal Estate
A condo inspection means walking through the actual unit and comparing it against the contract and normal build quality before you sign the transfer of ownership. The point is to catch defects while the developer is still on the hook to fix them. Five systems cover most of what matters: structure and walls, electrical, plumbing, doors and windows and paint, and the bathroom. If you are still choosing a unit, you can compare new, resale, and rental condo listings in one place on Talata, then book your inspection once you have found the right room.
What a condo inspection is and why to do it thoroughly before transfer
Timing is the whole reason inspection matters. Before you sign the transfer, the leverage sits with you as the buyer, because the developer still has to hand over a unit that matches what was agreed. Spot a defect and they fix it first. The moment you sign and pay the balance, that changes. Many repairs become a question of whether they fall inside the warranty, and in some cases the cost lands on you.
First-time buyers often assume a new unit from a large developer will be fine. But a lot of construction gets done in a short window, and things slip past the crew all the time, from small stuff like wavy paint or messy silicone to problems that affect daily life, such as a water leak, a sloping floor, or an outlet with no power. Inspecting carefully is not about nitpicking. It is about using a right you hold now, before that right disappears with your signature.
What to prepare before inspecting a condo
The inspection goes faster and more thoroughly when you bring the right things. You do not need expensive gear. Several ordinary household items do the job well.
Tools worth bringing
- A voltage tester pen, to check that outlets are live and wired correctly
- A phone charger or a small hair dryer, to plug into every outlet and confirm it actually delivers power
- A tape measure, to check room dimensions and heights against the floor plan
- A marble or golf ball, to roll across the floor and reveal any abnormal slope
- Sticky notes or coloured tape, to mark each defect so the crew can see it clearly
- A flashlight, or your phone's, for dark corners, under sinks, and inside cabinets
- A cup or bottle of water, to pour on the bathroom and balcony floor and check drainage
- Your phone, to photograph every issue as evidence
Documents to have on hand
Bring the sale contract and the floor plan so you can check that outlet positions, light points, room size, and materials match what was promised. The developer usually provides a handover or defect form, but bringing your own checklist keeps you from forgetting the important points. Book the inspection during daylight if you can, since natural light makes marks on walls and floors far easier to see.
Condo inspection checklist, system by system
The way to avoid missing anything is to work through one system at a time rather than wandering around the room. The five groups below give you points you can check off as you go.
Structure, walls, floor, ceiling, and cracks
Scan every wall and the ceiling for cracks, damp patches, or water stains. Tap the walls lightly and listen. A hollow sound means a void behind the surface, different from the solid tone of a properly filled area. For the floor, roll a marble to read the slope, and walk the whole unit listening for tiles that click or crunch, which means they were not laid tightly.
Cracks need a careful eye. Thin hairline cracks in the plaster surface, running vertically, are usually normal material shrinkage and not a big worry to repair. A quick way to judge size is to try sliding an ID card into the crack. If it goes in, that is a wide crack worth repairing, for example by epoxy injection. The ones to take seriously are diagonal cracks at roughly 30 to 70 degrees, cracks on columns or beams, and cracks running around a column. These can point to the structure and how it carries load, so have an engineer assess them before you decide. This matters even more for buildings that recently felt tremors, such as the earthquake on 28 March 2025 whose shaking reached Bangkok. If it is a condo, ask the building's juristic person to have the whole structure checked as well.
Electrical
Plug a charger or hair dryer into every outlet to confirm real power, and use the voltage tester to check correct polarity and a proper ground. Flip every switch to see it controls the light it should. Trip the breakers in the panel to confirm they actually cut power and that the circuits are labelled correctly. Check that the electricity meter belongs to your unit and that the starting reading looks reasonable. The points people forget most are the doorbell and the balcony socket.
Plumbing and drainage
Open every tap at once to check the flow is strong enough and the water runs clear with no sediment. Turn them off and watch for drips at the joints. Look under the bathroom and kitchen sinks for a dry surface or signs of a leak. Flush the toilet to see it clears well and refills normally. Pour water on the bathroom and balcony floor to confirm it all runs to the drain without pooling. Waste pipes should clear quickly and give off no back-odour.
Doors, windows, paint, and silicone
Open and close every door and window to check they move smoothly, without sticking or scraping. Test the locks. Glass should have no cracks or fine scratches. Frames and silicone beads should be continuous and neat, with no gap for water or air. View the paint in raking light and you will quickly see any ripples, drips, or thin patches.
Bathroom and drainage
The bathroom is where problems show up most, because it packs several trades into a small space. Tap the wall and floor tiles for hollow spots, check that the grout lines are full and even, and look for tiles that bow or chip. Test the floor drain to see water leaves quickly, and confirm the floor slopes toward the drain rather than out toward the doorway where water would pool. If there is a bathtub or a shower screen, check the waterproofing and the silicone all the way around.
Download a condo inspection form and checklist (PDF/Excel)
Having a form in hand keeps the inspection systematic and captures better evidence than scribbling on blank paper. A good form gives you rows to work through unit by unit and system by system, a place to note each issue, a status tick, and space to attach photos. When you finish, use that same form to get the developer's representative to sign off, then keep a copy for the re-inspection.
To make it work, photograph every marked point and name each file to match the number on the form, for example bedroom wall point 3, and note the location on the floor plan too. When the developer finishes the fix, you can check back against the exact same spot.
Inspect it yourself or hire a condo inspection company
There is no single right answer here. It comes down to your confidence, your time, and your budget.
The case for doing it yourself
Inspecting yourself is cheaper and flexible. You pick the time, and you get to go over your own unit slowly without rushing. It suits a studio or a one-bedroom where the checkpoints are not complex. The limit is that some problems hide behind walls or inside pipes, and without specialist tools and experience you may not spot them. Bringing along someone who has done an inspection before helps a lot.
How inspection companies price the job, and who they suit
Inspection companies usually carry tools most people do not have, such as a pipe camera, a thermal camera to find leaks or damp behind walls, and a level more accurate than the eye. Fees generally depend on unit size and the number of inspection rounds, starting around 2,500 to 3,000 baht for a standard one-bedroom and rising with area or if a re-inspection after fixes is included. Ask several providers for their rate and scope before you decide. This option suits people who are short on time, have a large unit, or want a written report to hold the developer to.
How second-hand condo inspection differs from a new unit
A new unit is checked against the standard the developer promised. A resale unit is checked to see its real condition after being lived in, so the focus shifts. With resale, look for signs of accumulated leaks, water stains on the ceiling that hint at a leak from the floor above, ageing electrical and plumbing, and built-in furniture that still works with hinges that are not loose.
One thing a new unit does not have but a resale does is its standing with the juristic person. Ask whether the unit has any unpaid common-area fees, since an outstanding balance can pass to the new owner, and ask to see the repair history or any past problems with the room. If you are comparing several resale units, browsing the listings with photos and details on Talata and shortlisting the ones you like before booking inspections will save you time.
What to do when you find a defect during inspection
Finding defects during inspection is normal. What matters is handling them methodically so the developer fixes the right spots and you can re-check.
Log the defects and notify the juristic person or developer
Write down every issue on the defect form in detail, naming the room, the location, and the nature of the problem. Photograph each one. Have the developer's representative sign to acknowledge the list and set a clear date for the repairs. Always keep a copy for yourself. On the agreed date, ask to re-inspect only the points you flagged, confirming they are genuinely fixed before you move ahead with the transfer.
When you should not sign for transfer
Minor issues like paint or silicone can usually wait for the scheduled fix. But when the problem affects living in the unit or safety, such as a leak whose source is still unknown, faulty electrics, or a crack you suspect is structural, holding off on the transfer until it is fixed is the safer path. Once you sign, your leverage drops immediately. Weigh it up and compare your options carefully before you put your name down.
Found problems after transfer, can you still get repairs or file a complaint?
Signing the transfer does not end your rights straight away. Under the standard condo sale contract set by Thailand's Office of the Consumer Protection Board (OCPB), the developer is liable for defects in the building structure for five years from the date of transfer, and for fixtures and major building components for at least one year. Some contract forms state a different period, so read your project's actual contract as well. If a problem appears within the warranty window, notify the juristic person or the after-sales team in writing with photos and details, and keep a record of every follow-up. If the developer ignores you or refuses a responsibility that should fall inside the terms, you can still file a complaint with the OCPB.
Why find your condo on Talata
Before you get to the inspection, you have to find the right unit first. Talata brings new, resale, and rental condo listings from many sources into one place, so you can filter by location, price, floor, or number of bedrooms and compare several units side by side before deciding. When you find one you like, you can contact the owner or the developer directly, arrange a viewing, and inspect the actual unit against the checklist in this article.
If you have a condo to sell or rent out, listing it on Talata with clear photos and full details helps buyers and renters who know how to inspect decide faster, because the information is straightforward from the start. When you are ready, start searching or list your condo on Talata.
Frequently Asked Questions
What should I check when inspecting a condo?
Five systems cover the essentials: structure and walls (cracks, sloping floor, ceiling), electrical (outlets, switches, breakers), plumbing (water pressure, leaks, drainage), doors, windows and paint, and the bathroom. Work through one system at a time and log every issue on a defect form with photos.
If I find a defect during inspection, can I refuse the transfer?
Minor issues usually wait for the developer's scheduled fix and a re-inspection. But if it affects living in the unit or safety, such as a serious leak, faulty electrics, or a crack you suspect is structural, you can hold off on the transfer until it is fixed, since your leverage is strongest before you sign.
After transfer, can I still get the developer to fix issues or file a complaint?
Yes, within the warranty under the OCPB standard contract: five years for the building structure from the transfer date, and at least one year for fixtures and major components. Notify the juristic person or after-sales team in writing with evidence. If the developer ignores you, you can complain to the OCPB. Check the exact warranty in your project's contract, as some differ.
What should I look at specifically with a second-hand condo?
Focus on real condition after use: water stains on the ceiling that hint at past leaks, ageing electrical and plumbing, and built-in furniture that is still solid. Importantly, ask the juristic person about any unpaid common-area fees, since an outstanding balance can become the new owner's burden.
Should I inspect a condo myself or hire an inspector?
Doing it yourself is cheaper and flexible, and fine for a small unit if you have some knowledge. A company brings specialist tools like a pipe camera and a thermal camera, and suits a large unit, a tight schedule, or when you want a written report. If you are unsure, hiring for the first round to set a baseline is a reasonable choice.
How much does a condo inspection company cost?
Fees start around 2,500 to 3,000 baht for a standard one-bedroom and rise with unit size, the number of checkpoints, and the number of rounds. Larger units or packages that include a re-inspection after fixes cost more. Ask several providers for their rate and scope before deciding.
