THAILANDSICThailand Standard Industrial Classification

TSIC Activity

43120

Site preparation

ประกอบกิจการ รับถมดิน ปรับพื้นที่ และเตรียมพื้นที่ก่อสร้าง ทุกประเภท

What this activity covers

Companies in this sector prepare sites for construction and mining through earthworks and land clearing activities.

  • Site preparation — Preparing construction and mining areas
  • Earthworks — Excavation, filling, and leveling land
  • Land clearing — Removing obstacles and debris from sites
  • Ditch digging — Creating drainage and irrigation channels
  • Rock blasting — Using explosives to clear rock obstacles

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

  • Transportation services — Moving soil, stones, and other materials
  • Canal excavation — Creating canals for drainage or irrigation
  • Land filling — Adding material to raise land elevation
  • Earthmoving — Moving large quantities of earth for construction

Not included here

  • Drilling for oil or gas wells, see subclasses 0610 and 0620.
  • Test drilling and inspection of wells for mining purposes (other than oil and gas extraction), see subclass 0990.
  • Removal of soil contaminants, see subgroup 3900.
  • Well drilling, see sub-group 4220
  • Sinking of structures, see subgroup 4390.
  • Oil and gas well exploration, geophysical, geological and seismic surveys, see subgroup 7110.

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 43

Construction, except construction of infrastructure providing basic public services in public utilities or transport that requires special apparatus, machinery, technology or expertise, and except other categories prescribed in ministerial regulations

The infrastructure carve-out is subject to a minimum foreign capital requirement, subject to capital thresholds, verify current figures.

FBA B.E. 2542, List 3 (10)Routes: Foreign Business Licence, BOI promotion, US Treaty of Amity

Auto-mapped, verify against the Act. These TSIC mappings are indicative, not legal advice; the schedules of the Foreign Business Act B.E. 2542 are the authority. See the full foreign ownership reference.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

2,127
active companies operate here
฿11.9Bregistered capital, combined
฿16.9B
Sector revenue · 2025
-9% since 2023
฿288.6M
Net profit · 2025
748 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
0%of new registered capital is foreign-held
฿0 foreign฿153.6M Thai

Almost entirely Thai-held — little foreign capital enters here.

New in 2026

102+3.0%

registrations, YTD

Registered capital

฿11.9B-0.4%

since year-end

Largest by revenue

Latest filed-year revenue, not a multi-year total

  1. 1ITD-CRIEC Number Ten Joint Venture฿2.6B
  2. 2ITD-NWR MRT Joint Venture฿2.4B
  3. 3ITD-VCB Joint Venture฿870.6M
  4. 4Saimoon Construction Co., Ltd.฿693.8M
  5. 5Italian-Thai - Takenaka Joint Venture฿403.4M

Largest by registered capital

  1. 1Arthit Uthai 88 Holding Co., Ltd.Nakhon Sawan฿2.2B
  2. 2ES Construction (Thailand) Co., Ltd.Nakhon Sawan฿2.2B
  3. 3Asia Oil and Energy Co., Ltd.Bangkok฿1.0B

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

845
Registered
since 2022
782
Still active
63
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 279 in 20222026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

Emerhub

Restricted activity? There is usually a route.

Emerhub structures foreign-owned companies around FBA restrictions: Foreign Business Licence applications, BOI promotion, and compliant shareholding structures. Talk through your case before you commit to one.

Talk to Emerhub Thailand