What the sales agent promised is part of your contract
Anyone who has shopped for a house or condo knows the routine: choose an area, visit a few projects, walk through the show unit and listen to the sales agent. Much of what you learn about a project comes from that conversation. Thai consumer law treats those statements seriously.
In short
- Advertisements, brochures and statements by a business about what it will provide count as part of the contract.
- What a sales agent says on behalf of the company binds the company.
- The rule covers houses and condos, and also cars, appliances and other consumer goods.
Typical promises
During a visit, a sales agent might tell you:
- that once every unit is sold, the clubhouse and the lake will be handed over to the residents as common facilities, or
- that the house is well built, the land has been filled and compacted, it will not sink, and the carport stands on proper piles.
Statements like these are often what makes a buyer decide.
When reality turns out differently
A few months after moving in, the estate floods. The ground around the house sinks and the carport cracks. The developer fills in the lake and builds more houses on it. The clubhouse is sold to an outside company, which charges residents a fee and lets non-residents in.
Can the buyer rely on what the sales agent said? Under consumer law, yes.
Keep the evidence. Before you sign, take photos of the brochure and the show unit, save the project's online posts, and ask the sales agent to confirm important promises by LINE or email.
What the law says
Under the Consumer Case Procedure Act, any announcement, advertisement, assurance or act by a business that leads a consumer to understand, at the time of the contract, that the business will provide goods, services or facilities is treated as part of the contract. It does not need to be in writing (section 11).
In plain terms: in a consumer contract, what you were promised can carry the same weight as what is written.
The sales agent speaks for the company
A sales agent acts on behalf of the business. What the agent tells a buyer is treated as what the company promised. A developer cannot avoid a promise by saying the agent was not authorised to make it.
Not only houses
The rule applies to consumer contracts generally: condos, cars, air conditioners, televisions, cosmetics, medicines and dietary supplements. Two court decisions show how it works for condominiums:
- A condo brochure is part of the contract: the entrance road case
- Beach path and access road shown in the brochure are common property
What to do
- Keep the brochure, the price list and any printed plans.
- Save screenshots of the project's website and social media posts.
- Write down what the agent promised, with the date and the agent's name, and ask for confirmation in writing.
- If a promise is not kept, raise it in writing with the developer first, and get advice before deadlines run out.
Legal references
- Consumer Case Procedure Act B.E. 2551 (2008), section 11
This explainer gives general information about Thai law as at 14 October 2026. It is not advice on your situation. Interest rates and amounts in court decisions reflect the law when each decision was made. Contact the office before you act.