Sort early-Sukhumvit or Silom condo listings by price per square metre and the top results are invariably towers built twenty or thirty years ago — 70-square-metre units priced where the new building next door sells 30. Every buyer asks the same question: this cheap, what's hidden? The honest answer: some real risks worth respecting, and some expensive prejudice worth exploiting. This guide separates the two so the decision runs on facts rather than fear or greed.
The 40–60% discount stacks several forces. The first is fully rational: buildings genuinely depreciate, systems have service lives, and buyers must budget renovation. The second is half-rational: banks lend more cautiously on old towers (next section), narrowing the buyer pool — a liquidity discount rather than a utility one. The third is pure bias: the Thai market worships newness, though well-built 25-year-old concrete has no structural problem at all; many 1990s towers were over-engineered beyond today's minimums, with higher ceilings, thicker walls and wider building gaps. For buyers who can assess, the discount created by the second and third forces is edible — good product priced below its worth.
This is where plans get hit hardest. Banks treat old condos conservatively on three axes: appraisals often land below actual transaction prices, requiring more cash to bridge; loan tenor may be capped by building-age formulas, so a 25-year-old tower can mean less than the full 30 years — higher monthly installments; and some banks apply lower internal LTV ceilings beyond certain ages. Practical moves: canvass several banks' old-building rules before any deposit — criteria differ widely — and note that banks already holding loan portfolios in that tower usually quote better, because they know the collateral. Ask the juristic office which banks most units in the building borrowed from.
A fair old-versus-new comparison uses whole-holding cost, not sticker price, with three additions. One, renovation: an original-condition old unit deserves 8,000–15,000 THB per sqm for a proper overhaul (in-unit wiring, bathrooms, floors, kitchen). It sounds heavy, yet a fully renovated 70 sqm at 700k total still undercuts a new 35 sqm — at double the size. Two, fees and their trajectory: many old towers still charge era-of-construction rates, which sounds attractive but is actually risk — age-driven major works (lifts, pumps, risers, the roof) will eventually force fee rises or special assessments. Read the juristic accounts and ask directly what major works are planned within five years and whether the fund covers them. Three, exit liquidity: on your resale day the tower is older still and the next buyer faces tougher financing — old condos suit long holds and rentals (where yields off the cheap base are often excellent) far better than short-term speculation.
| Factor | Worth buying | Walk away |
|---|---|---|
| Juristic/finances | Collection >85%, growing fund, clear works plan | Accumulating arrears, thin fund, failed AGMs |
| Major systems | Lifts/pumps/pipes/roof replaced or funded plans exist | Everything original with no plan |
| Occupancy character | Many owner-occupiers/long tenants, tight community | Swaths of dead-shut units, desolate corridors |
| Location | Where new supply can no longer appear (central sois, 5-minute station walks) | Surrounded by rising new towers that keep squeezing it |
| Structure | No structural cracking or abnormal settlement (hire an engineer if unsure) | Diagonal cracks at columns/beams, chronic seepage stains building-wide |
The principle behind the table: age is just a number; what is truly young or old is the management. A 25-year-old tower with a strong juristic replacing systems on schedule can live well for decades more, while an 8-year-old building that can't collect fees is descending faster. Buy the management, not the construction year.
Dissolving a condominium to sell its land requires co-owner resolutions at very high statutory thresholds — practically rare and slow even when land exceeds building value. Never buy an old condo primarily on redevelopment hopes; value it on use and rent, and treat any land-share windfall as a free option that may not arrive within your holding lifetime.
High-rises predating current seismic design codes differ from new stock — a fact to know, not an automatic disqualifier. Actionable checks: confirm the building passes its legally required annual building inspection (large buildings need certified inspectors) and that the juristic carries adequately sized insurance across core perils. Both documents can and should be requested.
They rent well, often at better yields than new stock thanks to the cheap base. Target tenants prioritise space and location: families needing 2-3 bedrooms near work and schools on a budget, professionals wanting the city core without paying for infinity pools. A beautifully renovated old unit in a cared-for tower competes with new buildings at 20-30% lower rent — exactly what today's tenants hunt.
Old condos are the market's prejudice-priced deal, leaving a gap for buyers who assess with facts: audit the juristic finances, verify the systems, budget renovation and future fees, arrange financing with old-building-friendly banks, and choose only towers whose management is still young. The reward is space and location the same money simply cannot buy new. Browse curated resale condos at MyProperty listings.
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