THAILANDSICThailand Standard Industrial Classification

TSIC Activity

43909

Other specialized construction activities, not elsewhere classified

ประกอบกิจการงานรถแมคโคร งานขุดดิน งานคอนกรีต งานหินคลุก

What this activity covers

Companies engage in specialized construction activities requiring unique skills or equipment, including scaffolding and moisture protection.

  • Specialized construction — Activities needing special skills or equipment
  • Moisture protection — Work to protect buildings from moisture
  • Scaffolding services — Installation and dismantling of scaffolding
  • Steel structure installation — Installation of non-factory assembled steel parts
  • Roofing — Roofing services for residential buildings
  • Subsurface work — Construction activities below ground level
  • Outdoor swimming pools — Construction of outdoor swimming pools

What companies here also do

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

  • Concrete repairs — Repair of concrete structures
  • Cleaning services — Cleaning external buildings with steam and sandblasting
  • Cranes rental — Rental of cranes with operators

Not included here

  • Renting of construction machinery and equipment without operator. See activity 77305.

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.

4,407
active companies operate here
฿21.3Bregistered capital, combined
฿70.0B
Sector revenue · 2025
+2% since 2023
฿3.2B
Net profit · 2025
1,961 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
22%of new registered capital is foreign-held
฿19.0M foreign฿68.1M Thai

Foreigners are actively investing in this activity.

1 of the 5 largest companies here are foreign-owned Thailand subsidiaries.

New in 2026

67+19.6%

registrations, YTD

Registered capital

฿21.3B-2.8%

since year-end

Largest by registered capital

  1. 1Manhattan Oil Co., Ltd.Bangkok฿2.0B
  2. 2Dynamic Group Products Co., Ltd.Bangkok฿700.0M
  3. 3STP and I Public Company LimitedBangkok฿474.1M

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.

508
Registered
since 2022
490
Still active
18
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 142 in 20242026

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