419100Structural alteration and addition works
建築物結構更改及加建工程
Why 6 digits?
HSIC subclasses are 6 digits. The first four match the international ISIC class; Hong Kong adds a two-digit local suffix for finer detail, especially across its import and export trade, so a code steps from a 4-digit class straight to a 6-digit subclass. More on the HSIC structure.
This activity involves the modification of existing buildings and structures through structural alterations and additions. It includes tasks such as expanding the size of a building or changing its layout while ensuring the integrity and safety of the original structure.
This classification includes
- addition works at erected buildings and structures
- structural alternation at erected buildings and structures
Licences and approvals
What this activity needs to operate
No sector-specific licence applies to this activity. It can be set up as a standard Hong Kong company without extra regulatory approvals. Premises-based or product-based permits can still apply case by case; Emerhub confirms the exact position during scoping.
Offshore profits claim feasibility
LowThis activity typically involves physical alterations to buildings located in Hong Kong. Contracts are usually negotiated and executed within the region, and services are performed on-site, making it inherently tied to Hong Kong premises and customers.
Business registration wording
Suggested business nature for this activity
English
STRUCTURAL ALTERATION AND ADDITION WORKS SERVICES
49/60 characters
Chinese 中文
建築物結構更改及加建工程
12/30 characters
Industry statistics
How large is this sector in Hong Kong?
Official figures are compiled at industry level. These are for Construction (F), the industry this classification belongs to.
27,200
Establishments (2023)
195,800
Persons engaged (2023)
C&SD Annual Survey of Economic Activities 2023Verified 2026-07-14
Standard compliance
Compliance every Hong Kong company shares
Beyond anything specific to this activity, every Hong Kong company handles two-tiered profits tax, the annual return (Form NAR1) within 42 days of its incorporation anniversary, audited accounts, MPF enrolment for staff, and a company secretary. Emerhub runs all of it on your behalf.
See the full Hong Kong compliance calendarFrequently asked questions
Do I need a license for structural works?
Yes, you need to comply with local building regulations and may require specific licenses for structural alteration and addition works.
What are the tax implications for this activity?
Profits from structural alteration and addition works are subject to Hong Kong profits tax, as the activities are performed within the territory.
Can I operate this business without a physical office?
While a physical office is not mandatory, having a local presence is beneficial for client trust and compliance with local regulations.
Incorporate in Hong Kong
Starting a structural alteration and addition works business in Hong Kong?
Emerhub incorporates your company, registers the business nature above with the IRD, files every licence application, and runs your company secretary and compliance calendar. You provide the documents; Emerhub handles every government interaction.
Start incorporation with Emerhub