Bangkok Buyer's Checklist: 55 Things to Inspect Before Buying Your Condo
You’ve found a condo to buy. Good location, recent renovation, the price seems reasonable for the area. The agent mentions other buyers are interested. “We should move quickly on this one.” You’ve heard that before.
Here’s what changes when you’re buying instead of renting: once you transfer, every problem in that unit is yours. Permanently. There’s no landlord to call. No building management obligated to fix things for you. That slow drain, that hairline crack in the bedroom wall, that AC unit running on borrowed time? All yours now.
Agents work for the seller. Their commission depends on closing the deal. They have zero incentive to mention that the foreign ownership quota is nearly full or that the building’s maintenance coverage has gaps.
We built this 55-item checklist from years of inspecting condos across Bangkok for foreign buyers. These are the items our inspectors evaluate before any client signs a transfer.
What the full checklist covers
Our 55-item checklist is organized into 9 sections:
1. Before the viewing / due diligence (8 items)
The inspection starts before you set foot in the unit. Verify the foreign ownership quota — if the building is at 49%, you cannot legally purchase as a foreigner. Research the developer’s track record. Check what maintenance the condo management covers versus what becomes your responsibility. Review monthly maintenance fees and rental restrictions if you plan to lease the unit later. Look into the building’s earthquake inspection status and pest control history.
2. Building and common areas (8 items)
Lobby condition, elevator maintenance records, security systems, parking, pool and gym upkeep. These reflect how the juristic person manages the building. Poor common area maintenance signals deferred spending everywhere, including the structure you’re about to own a piece of.
3. Structural and safety (7 items)
Wall cracks, ceiling stains, floor leveling, window seals, fire safety equipment. Bangkok’s mix of fast construction, tropical weather, and seismic activity creates problems that aren’t obvious during a 20-minute viewing. After the March 2025 earthquake, thousands of buildings in Bangkok reported new cracks. Cracks wider than 3mm or in diagonal staircase patterns suggest structural movement.
4. Plumbing and water (6 items)
Water issues are the most common and most destructive problems in Bangkok condos. Low pressure, slow drains, hidden leaks. At 70-80% humidity, any water problem becomes a mold problem fast. When you’re renting, the landlord pays for the plumber. When you own, that’s your bill.
5. Electrical and AC (8 items)
AC replacement in Bangkok costs 15,000-40,000 baht per unit. The checklist covers circuit panels, outlet testing, cooling performance, and AC drainage. Clogged AC drains are the number one cause of indoor flooding in Bangkok condos.
6. Kitchen and appliances (5 items)
Refrigerator seals, exhaust hood function, cabinet condition, and pest entry points. Kitchen problems attract pests faster than anything else. If you’re buying a furnished unit, every appliance becomes your responsibility the moment you transfer.
7. Bathroom (4 items)
Water, humidity, poor ventilation. Bathrooms are where mold takes hold first. Exhaust fans, drainage, and silicone seals all need inspection. Regrouting and mold remediation after purchase is expensive and disruptive.
8. Climate-specific (4 items)
Window seal integrity, hidden areas behind furniture, closet ventilation, exterior wall temperature. These issues develop invisibly and compound fast in tropical conditions. Sellers and agents position furniture strategically. What’s behind that wardrobe might change your offer.
9. Buyer-specific checks (5 items)
This section doesn’t exist in a rental checklist. Verify the title deed (Chanote) matches the unit and seller. Assess common area condition relative to the maintenance fees being charged. Check surrounding area development plans that could affect your view, noise levels, or resale value. Research the unit’s history: how many times has it changed hands, and why? Look at resale potential based on building age, location trends, and foreign quota status.
A few examples from the full checklist
Here’s a sample of what you’ll find:
Due diligence: Check the foreign ownership quota before you fall in love with a unit. Thai condo law caps foreign ownership at 49% of total unit area per building. If the building is at or near that limit, your purchase may not be legally possible, or you’ll face complications at the Land Department.
Due diligence: Ask what maintenance the condo management covers. Some buildings cover internal plumbing up to the unit entrance. Others stop at the meter. This affects who pays when pipes fail — you or the building.
Building: Look at the common area maintenance log, not just the common areas themselves. A building can look clean today but have a pattern of deferred repairs. Ask the juristic person for recent meeting minutes. How they handle owner complaints tells you what your ownership experience will look like.
Structural: Run your hand along window frames and balcony door seals. In Bangkok’s climate, failed seals let moisture in between the glass or into the wall cavity. By the time you see the stain on the inside, the damage is already significant.
Plumbing: Flush every toilet and run every tap simultaneously. Water pressure problems in Bangkok condos often only show up under load. A unit that seems fine with one tap running can lose pressure completely when two or three are going at once.
AC: Ask when each AC unit was last serviced and check the manufacture date on the outdoor compressor. AC units in Bangkok run hard. A 7-8 year old unit in this climate is near end of life. Factor replacement cost into your purchase decision.
Kitchen: Check behind and underneath the refrigerator. This is the most common spot for pest activity that sellers clean up before viewings. Fresh cleaning product smell in a kitchen that otherwise looks lived-in is worth noting.
Bathroom: Press on the tiles around the shower area and near the floor drain. Tiles that flex or feel hollow mean water has gotten behind them. That’s not a cosmetic fix. Retiling a bathroom runs 15,000-30,000 baht depending on size.
Climate: Check the exterior wall temperature with your hand, especially walls that face west or south. Hot exterior walls can mean inadequate insulation, which drives up your electricity bill and puts extra strain on the AC.
Buyer-specific: Request a copy of the Chanote (title deed) and verify it matches the unit number, floor, and building name. Make sure the seller’s name matches the registered owner. Title issues surface at the Land Department during transfer — too late to renegotiate.
Get the complete 55-item checklist
The full checklist includes all 55 items with explanations of what to look for and why each one matters for buyers specifically. It’s formatted as a printable PDF you can bring to viewings and share with your lawyer.
Download the Free 55-Item Buyer’s Checklist (PDF)
What a professional inspection adds
This checklist covers what you can spot yourself. Professional inspectors find what you can’t.
Our inspectors are Thai property owners. They’ve dealt with these problems in their own buildings and know where issues hide. They speak English and communicate with building management and juristic persons in Thai, closing the language gap that leaves most foreign buyers relying entirely on the seller’s agent for information.
We don’t take referral fees from sellers or agencies. Our only job is finding problems before you sign the transfer. If our inspection convinces you to walk away, we’ve done our job. If it gives you a list of defects to negotiate the price down, even better.
What you get:
- Visual inspection of all 55 checklist items
- Photo documentation of every defect
- English PDF report within 24-48 hours
- Direct communication via WhatsApp, Telegram, or Messenger
Cost: US$499 / THB 15,900 for condos up to 120 sqm. Less than 0.5% of your purchase price. For houses and penthouses over 120 sqm, pricing starts at THB 25,000 based on property size.
Want professional eyes on the unit?
Doing your own inspection is better than buying blind. But when the purchase price is measured in millions of baht, trained inspectors who know where Bangkok sellers hide problems pay for themselves.
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Bangkok Inspect provides property inspection services only. This article is general information and does not constitute legal or financial advice. For legal matters, consult a licensed Thai attorney.