Do you need permission to demolish a building? Is it illegal? Here's a summary of the costs you should know.
- 04/07/2025
Demolition of a building is not just about knocking down a building or clearing an area. It involves laws, safety, and expenses that need to be planned in advance. If you are planning to demolish an old house or any structure, you should know what requires permission, what does not, and how much it costs so that you do not encounter problems later.
What is building demolition?
Demolition of a building means destroying or removing the structure of a building from an area, whether it is a single house, commercial building, high-rise building, or temporary building, to use a new area or prepare to build something new instead.
Do I need permission to demolish a building?
According to the Building Control Act B.E. 2522, if the building to be demolished is higher than 15 meters or is near another structure at a specified distance, permission must be requested from local officials or at least notified in advance. An application form must be submitted, along with blueprints, a list of engineers/architects, and related supporting documents.
Is it illegal to not request permission to demolish a building?
If you do not request permission or notify the demolition as required by law, you may be ordered to stop the demolition immediately and be fined or sued in the event of damage, such as disturbing neighbors or causing danger to people or property in the surrounding area.
Demolition Costs
The cost of demolition depends on the size of the building, the materials used, and the difficulty of the job. The approximate costs are as follows:
Half-thick brick walls: 25–30 baht/sq.m.
Full brick walls: 40–50 baht/sq.m.
General building structures: 650–1,000 baht/sq.m.
Labor costs, machinery, material transport, and additional safety costs: Average total: 50,000–100,000 baht or more for small houses
How to choose a demolition contractor
You should choose a contractor with a license, experience, and good reviews. Check the contract carefully, request a written quote, and compare from several companies.
Summary
Demolition of buildings must be done carefully according to the law. If neglected, there may be legal consequences and costs will be escalated. Planning in advance, requesting the correct permits, and choosing a reliable contractor are the keys to a safe and cost-free demolition.
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