This information is for reference only and is not legal advice. Consult a licensed lawyer before any transaction.
Town and Country Planning Act
Town and Country Planning Act B.E. 2562 (2019)
The information is reviewed and updated monthly against official sources.
In short
Thailand's Town Planning Act B.E. 2562 (2019) consolidates national to local land-use planning, giving colour-coded zoning maps, density and building limits legal force so that buyers must verify a plot's zone and stipulations before purchase or development.
Section 4: Key definitions: unitary and specific town plans
The Act defines town planning as multi-level physical development control and distinguishes the unitary town plan (the general, area-wide land-use blueprint with control measures) from the specific town plan (a focused scheme for creating, renewing or conserving a defined area). It also defines buildings, open space and accessory land, terms that shape every zone restriction.
Section 8: Hierarchy of plans
Plans form a tiered system: area-use policy plans (national, regional and provincial) set strategic direction, while land-use plans (unitary town plans and specific town plans) translate that into binding zoning on the ground. A buyer's parcel is governed mainly by the local unitary or specific plan, which must stay consistent with the higher tiers.
Section 22: Contents of the unitary plan: zoning, FAR, coverage, setbacks
A unitary plan carries the colour-coded land-use map plus enforceable stipulations: permitted business types and sizes, building kinds and heights, the floor area ratio, the building coverage or open-space ratio, setbacks and buffer zones, and minimum plot sizes for construction. These figures, not the colour alone, decide what and how large a project may be built.
Ministerial-Regulations-colour-zones: Colour-coded zoning categories
Ministerial Regulations attached to each plan assign land-use colours: yellow for low-density housing, orange for medium-density, brown for high-density residential, red for commercial, purple for industry, green for agriculture and rural land, white-with-green-stripes for rural conservation, plus blue, olive and grey for public, educational and religious uses. Each colour carries its own permitted and forbidden activities.
Section 33: How a plan becomes binding
A unitary plan takes legal effect once issued as a Ministry of Interior Notification or a Local Ordinance and published in the Government Gazette. Where overlapping plans cover the same area, the most recently promulgated plan prevails, so buyers should check the current Gazette version rather than an outdated map.
Section 34: Five-year review and plan changes
Authorities must evaluate each unitary plan at intervals not exceeding five years, examining shifts in land use, population density and the environment. If conditions have materially changed, a new plan is prepared. Zoning is therefore not permanent, and a parcel's permitted use may tighten or loosen at the next revision.
Section 36: Public projects must follow the plan
Once a unitary plan is in force, State physical-development projects, including roads and utilities, must align with the land use it directs. This makes the plan a reliable indicator of future infrastructure and surroundings, which matters when assessing access, services and the long-term character of a location.
Section 37: Prohibition on use contrary to the plan
Within an area governed by a unitary plan, no one may use land or build in a way that conflicts with the plan's land-use stipulations. Lawful uses that predate the plan may continue, but the planning authority can order changes or cessation, with compensation, if continuation seriously clashes with public-interest objectives.
Section 38: What counts as protected prior use
Pre-existing use is protected only if it was genuinely established before the plan, and where the law required a permit or approval, that permission must have been obtained. Use begun without the legally required authorisation does not gain grandfathered status, so buyers relying on an existing operation should confirm its permits.
Section 39: Specific plans and expropriation
A specific town plan is enacted by an Act or Royal Decree for a targeted area, such as a new town or a renewal zone. Where implementation requires it, immovable property may be expropriated under the expropriation law, a risk worth checking for plots inside or near a declared specific-plan area.
Section 40: Specific-plan controls on building and use
Specific plans divide land into detailed zones and list buildings and businesses that are permitted or forbidden, along with heights, sizes, plot dimensions, accessory-land strips and conservation rules. They can also require demolition or relocation of unsuitable buildings, so due diligence here is more granular than for ordinary zoning.
Section 51: Compliance duty inside specific-plan areas
In an area covered by a specific plan, owners may not use land or alter property in breach of the enacting Act, Royal Decree or related Ministerial Regulation. This binds even minor modifications, meaning renovations and changes of use inside such zones require careful alignment with the specific-plan rules.
Section 90: Right to appeal planning orders
A person affected by a planning decision, such as a use-restriction order or compensation amount, may appeal within thirty days. An Appeals Committee chaired by the Minister reviews such challenges, giving owners a formal channel to contest restrictions that diminish the value or usability of their land.
Section 104: Penalties for ignoring demolition or correction orders
Anyone defying an order to demolish, relocate or modify a building, or an appeal decision or official directive, faces up to six months' imprisonment, a fine up to 50,000 Baht, or both. These sanctions back the planning authorities' power to enforce conformity on non-compliant structures.
Section 105: Penalties for using land against the plan
Using land or property contrary to a unitary plan (Section 37), a specific plan (Section 51) or the related regulations exposes the offender to up to one year's imprisonment, a fine up to 100,000 Baht, or both, plus a daily fine up to 30,000 Baht for each day the breach continues until it is corrected.
Practical-due-diligence: Why to check zoning before buying
Because zoning fixes whether you may build a villa, condominium or business and how large, every purchase should start by confirming the parcel's colour zone, its FAR, coverage and setback limits, any specific-plan or expropriation overlay, and that existing structures hold valid permits. Verifying the current Gazette plan prevents buying land that cannot serve its intended use.