Home construction loans: what banks look at and how to prepare to get approved easily
A construction loan differs from a home purchase loan in that the bank doesn't pay one lump sum but releases money in stages as construction milestones progress, sending someone to inspect the site before each release. Understanding this mechanism lets you plan correctly with your contractor
Main criteria banks consider
- Ability to repay — Total repayments on all debts shouldn't exceed 30–40% of monthly income; e.g. a 50,000 salary allows about 15,000–20,000 in repayments, enough to borrow roughly 2–3 million baht over 30 years (actual figures depend on interest rates at the time)
- Collateral — Land + the house to be built; after valuation the bank lends about 80–100% of construction value (if the land is unencumbered, the limit is much better)
- Credit history — Check your own credit bureau record before applying; if there are arrears, clear them and wait for the status to return to normal for at least 6–12 months
- Drawings and contract documents — The bank needs construction drawings, the permit, the lump-sum contract and the BOQ to assess value; a contractor with a clear identity makes approval easier
Prepare 6 months ahead
Keep your bank statements clean: salary paid in regularly, avoid withdrawing everything as soon as it arrives. Freelancers should receive income into one account and pay tax so there's evidence. Pay off credit cards or car loans as much as possible to raise your repayment ceiling, and never take on new debt while applying
Tips people rarely mention
You can apply to 2–3 banks at once — it's allowed — then pick the best offer. Compare the "average interest over the first 3 years", not the advertised first-year rate, and look at mortgage registration, valuation and insurance fees bundled in. Roughly calculate repayments and loan limits with the "Home loan calculator" on Bhoon Kharn — free, with no contact details required
This article is general knowledge, not financial advice; actual terms depend on each bank and the time