Price per Square Metre: Definitions That Distort Comparisons
Which price-per-square-metre definitions distort condominium comparisons in Thailand?
- Pillar
- Investment
- Jurisdiction
- Thailand (national framework; local, building, and contractual overlays noted in body)
- As of
- 9 Sept 2026
- Reader
- Foreign buyer, owner, or investor researching Thai residential property
- Reading time
- ~3 min
Direct answer
Price per square metre misleads when listings mix indoor area, balcony-inclusive area, and sometimes common-area notions without stating the definition. Equalise candidates to the same area basis—preferably contractual indoor measurements—before ranking. Otherwise a “cheaper” unit can simply be measuring more outdoor space.
Key takeaways
- 1.Ask which square metres are in the denominator.
- 2.Equalise definitions before comparing prices.
- 3.Balcony-heavy units need explicit adjustments.
- 4.Contract area beats brochure icons.
Important terms
Indoor / air-conditioned area — Often the most comparable residential basis—confirm contract wording.
Balcony-inclusive area — Inflates denominator and lowers headline THB/sqm.
Common area share — Ownership proportion themes differ from saleable indoor metres.
Equalisation — Recalculating all candidates onto one definition.
Detailed answer
Agents quote THB/sqm as if universal. It is not.
Distortion toolkit
- Outdoor metres counted as if indoor.
- Furniture packs bundled into price without area note.
- Gross vs net floor definitions across developers.
- Comparing resale indoor specs to off-plan marketing gross.
Method
Rebuild each offer as total THB ÷ chosen area definition. Footnote exclusions. Use REIC / BOT only for broad context—not to bless a listing’s denominator.
Ownership reminder
Foreign condo purchases still need lawful pathway checks (THAILAND.GO.TH, dol.go.th) regardless of attractive THB/sqm.
Step-by-step
- Collect area figures from SPA drafts or title specimens.
- Note balcony and shaft treatments.
- Pick one definition for your shortlist.
- Recalculate all prices.
- Rank only after equalisation.
- Inspect whether layout efficiency matches the maths.
Comparison table
| Definition | Effect on THB/sqm | Use |
|---|---|---|
| Indoor only | Higher headline | Best like-for-like living space |
| Indoor + balcony | Lower headline | Must disclose |
| Ambiguous brochure | Unreliable | Reject for ranking |
| With parking value mixed | Distorted | Separate parking price |
Hypothetical example
Labeled hypothetical: Unit A at THB 150,000/sqm on 40 sqm indoor. Unit B at THB 130,000/sqm on 40 indoor + 15 balcony. Equalising B to indoor-only raises its effective living-space price above A. The “bargain” was definitional.
Risks
- Overpaying for outdoor metres you value less.
- Mortgage appraisal mismatches—ask lenders what they use without inventing LTVs.
- Cross-building ranking errors.
- Ignoring fees that dwarf small THB/sqm gaps.
Checklist
- Area source documented
- Definition stated
- Shortlist equalised
- Balconies footnoted
- Parking unbundled
- Ownership diligence still run
FAQ
Which definition is legally mandatory in ads?
Practices vary; your contract measurements matter most for the deal.
Should outdoor space be valued at zero?
No—assign your own utility weight, but do not pretend it equals indoor.
Is this an appraisal?
No.
Related reading
- How to Build a Personal Claim Ledger for One Property Deal
- Using BOT Credit and Housing Indicators Without Forecasting
- Shareholder Agreements That Reduce Nominee Pressure
- Reading a Provincial Transfer Table from REIC Step-by-Step
- BOI Manufacturing/Services Land Privileges: Non-Residential Misuse Risks
Claim ledger
Important factual claims planned for this guide, with support status and applicable location.
- Needs professional reviewThailand
Educational framing for “Price per Square Metre: Definitions That Distort Comparisons” must be confirmed against current primary Thai sources before any transaction or immigration reliance.
Sources: rd-sbt, rd-stamp, bot-rppi-table, reic-home
Review flags
- Attach deeper controlling Thai instruments before upgrading reviewStatus.
- Have an appropriately qualified Thai professional review before readers rely on this for a transaction.
Sources and methodology
We prefer Thai government law and official procedures over secondary blogs. See also our methodology.
| Source | Publisher | Kind | Current as of | Limitations |
|---|---|---|---|---|
| Specific Business Tax overview SBT category for commercial/profitable immovable-property sales under royal decree rules | Revenue Department English overview | primary | 2026-09-09 | English; rates/exemptions need current Thai instruments |
| Stamp Duty overview Stamp duty themes for listed instruments including immovable-property related receipts | Revenue Department English overview | primary | 2026-09-09 | Confirm schedules and interaction with SBT in Thai text |
| BOT Residential Property Price Index table Official RPPI levels and methodology notes | Bank of Thailand Table last updated 31 Aug 2026 on retrieval | primary | 2026-09-09 | Not a forecast; condo sub-index is Bangkok and vicinities |
| Real Estate Information Center Housing market statistics and press releases | REIC Portal | primary | 2026-09-09 | Cite the specific release for any numeric claim |
Reviewed as of not yet professionally reviewed. Research as-of date: 2026-09-09.
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