THAILANDSICThailand Standard Industrial Classification

TSIC Activity

42901

Construction of waterways, harbour, dam and other civil engineering projects related to water.

รับจัดทำแผนที่ภาษีที่ดินและสิ่งปลูกสร้างให้กับองค์กรปกครองส่วนท้องถิ่นทั่วประเทศ

What this activity covers

This activity involves the construction and repair of various water-related civil engineering projects.

  • Ports and Harbours — Construction and repair of ports, piers, and jetties
  • Dams and Weirs — Construction and repair of dams, weirs, and embankments
  • Dredging Services — Dredging of waterways and removal of sediment
  • Hydraulic Structures — Construction of locks, sluices, and similar structures
  • Marinas — Construction and repair of pleasure craft facilities
  • Underwater Operations — Underwater construction and repair activities

What companies here also do

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

  • Engineering Services — Providing engineering services for various systems
  • Public Utility Infrastructure — Construction of public utility systems and infrastructure

Not included here

  • Construction of water infrastructure projects, see activity 42201

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 42

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.

758
active companies operate here
฿31.1Bregistered capital, combined
฿61.7B
Sector revenue · 2025
+42% since 2023
฿2.2B
Net profit · 2025
301 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
12%of new registered capital is foreign-held
฿10.0M foreign฿73.1M Thai

Foreigners are actively investing in this activity.

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

New in 2026

44+450.0%

registrations, YTD

Registered capital

฿31.1B+17.7%

since year-end

Largest by registered capital

  1. 1Chaiyong (Thailand)intlSukhothai฿10.0B
  2. 2Italian-Thai Development Public Company LimitedBangkok฿6.3B
  3. 3Chaiyawong (N.D.) Co., Ltd.Nakhon Sawan฿5.0B

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.

114
Registered
since 2022
111
Still active
3
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 41 in 20262026

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