What to check before you buy waterfront land in Thailand

Waterfront land differs from ordinary land in one important way: one of its boundaries can move. What you are allowed to build is also more restricted than most buyers expect. This is the checklist we run before taking a plot on.

Start with the title document

Not every Thai land document can be sold on equal terms.

• Chanote (Nor Sor 4 Jor) is full title, properly surveyed, with marked boundary posts. It can be sold and mortgaged normally. This is what you want.
• Nor Sor 3 Gor is a certificate of use, surveyed from aerial photography. It can be transferred, but the boundaries may not be exact, and upgrading it to a chanote before you buy is the comfortable route.
• Nor Sor 3 is vaguer still, and transfers require a 30-day public notice period.
• Sor Por Kor 4-01 is agricultural land reform land and cannot be sold at all. If someone offers you a plot held under one, walk away.

Ask for a copy of the title and check it yourself at the local Land Office. Do not rely on a photograph the seller sends you.

Where is the water boundary, actually?

The most important question on any waterfront plot, and the one asked least often.

The boundary on the title was fixed on the day of the survey. The river was not consulted. Where a bank builds up naturally, section 1308 of the Civil and Commercial Code gives that accreted land to the owner of the adjoining plot — but in practice it still has to be surveyed and added to the title before it is really yours. Land you fill in yourself does not count as natural accretion at all.

The practical step is to have a fresh boundary survey done before transfer, and to compare the posts on the ground against the plan on the title. If the water frontage on paper and the frontage you can walk do not agree, that is a conversation to have before the transfer, not after.

Erosion and water levels

Visit twice: once in the dry season and once at the end of the rains. The two visits show you different properties.

What to look for:

• Signs of active erosion along the bank — exposed tree roots and slumping soil are the obvious ones.
• Whether a retaining wall already exists, what condition it is in, and who built it.
• Ask the neighbours how high the water has come. Someone who has lived there ten years knows more than any document.
• How far the land sits above the highest water level. If it needs another metre of fill, that is a cost to price into the negotiation, not to discover afterwards.

What you may and may not build

This is where buyers are most often caught out. Owning land against the water does not mean you can build out over it.

• Any structure encroaching on a public waterway needs permission from the Marine Department, and it is not given casually.
• A pier, bridge or sala projecting over the water without that permission is an illegal structure, and can be ordered removed.
• If the plot already has a jetty, ask to see the permit. Do not assume one exists.
• Local setback and building-height rules along waterways are stricter than inland in many districts.

Access

Plenty of waterfront plots are beautiful and very hard to reach. Establish whether the access is a public road or a route across someone else's land. If it is the latter, there must be a registered servitude recorded on the title — not a friendly understanding with the current neighbour, because the next owner of that neighbouring plot is not bound by a conversation.

In short

A good waterfront plot has clean title, a water boundary that matches reality, a stable bank, registered access, and a clear picture of what may be built before you buy. With all five, paying a little above the market usually makes sense. Missing any one of them, the discount you are being offered rarely covers the problem that comes with it.

This article is general information, not legal advice. Rules vary by district and change over time. Take any specific plot to a Thai lawyer and check it at the local Land Office before committing.