How to Check Interior Decoration Business Registration and Verify Legitimacy?

According to the Building Interior Decoration Management Regulations, businesses engaged in interior decoration must register as an interior decoration business. You can check the registration number and professional technical personnel qualifications through the Ministry of the Interior's National Building Management Information System. The following is a neutral compilation of information.

Ministry of the Interior, National Land Management Agency 'Building Interior Decoration Industry Registration' Inquiry ↗

How to Check Interior Decoration Business Registration Step by Step in the Ministry of the Interior's National Building Management Information System?

According to the Building Interior Decoration Management Regulations, businesses engaged in interior decoration must register as an interior decoration business, and registration data can be queried through the Ministry of the Interior's public system. General query steps are as follows:

Enter the query system: Open the Ministry of the Interior's "National Building Management Information System" and find the registration query function for "Interior Decoration Business".
Select query criteria: Common options include searching by "Company/Business Name" or "Interior Decoration Business Registration Certificate Number", and some allow filtering by city/county.
Input and submit the query: Enter the name or certificate number and submit to obtain a list of registered businesses.
Open registration details: Click on the business to view fields such as registration certificate number, responsible person, registration scope, and validity period.
Verify consistency: Compare the system data with the information provided by the business item by item.

The system interface and function names may be adjusted. Actual operation and data are subject to the latest announcements on the Ministry of the Interior's official system. This page is a neutral compilation of information.

After Finding Registration Data, Which Fields Should Be Verified?

After finding the data, it is recommended to verify the following key points item by item to confirm that the business's qualifications match your commission needs:

Field	Verification Focus
Interior Decoration Business Registration Certificate Number	Whether it matches the certificate number shown by the business
Company/Business Name, Unified Business Number	Whether the name and UBN match and actually exist
Responsible Person	Whether it matches the contracting party
Registration Scope	Whether it covers design, construction, or both, and matches the commissioned content
Validity Period	Whether the registration certificate is still within the valid period
Professional Technical Personnel	Whether the required qualified professional technical personnel are employed

The existence of a registration certificate number only indicates completion of statutory registration, not a guarantee of project quality. Always refer to the latest data on the official system. This page is a neutral compilation of information.

What Do "Registration Scope" and "Professional Technical Personnel" on the Registration Certificate Mean?

These two items are key to determining whether the business can legally undertake your project.

Registration Scope: Indicates the types of business the business can undertake (design, construction, or both). Businesses must not undertake projects beyond their registration scope. Therefore, if you are looking for a turnkey service (design + construction), it is advisable to confirm that the registration scope covers both.
Professional Technical Personnel: According to regulations, interior decoration businesses must employ professional technical personnel with certain qualifications. These qualifications generally include architects, relevant professional engineers, or those who have completed the professional technical personnel training and examination prescribed by the Ministry of the Interior and obtained a completion certificate.

The determination of professional technical personnel qualifications and registration scope is subject to announcements by the competent authority. This page is a neutral compilation of information.

How Can Registration Query Results Be Compared with the Business's Actual Work?

The query is just a starting point. It is recommended to compare the found data with the actual commission situation to reduce risk:

Request to show the registration certificate: Businesses are legally required to proactively display their interior decoration business registration certificate. You can ask them to provide it to verify the certificate number.
Compare registration scope with project content: Confirm that the project you want to do (design/construction) falls within their registration scope.
Confirm review requirements for large-scale projects: Projects involving partition walls, main structures, or a certain scale require additional interior decoration review and completion inspection as per regulations (refer to the "Interior Decoration Permit" page on this site).

If the business refuses to show the registration certificate, you can report it to the local city/county building management authority for inquiry.

This page is a neutral compilation of information and does not constitute legal advice. The registration status of businesses is subject to the latest query results on the Ministry of the Interior's official system.

FAQ

Is interior decoration business registration mandatory?

According to current regulations, businesses engaged in building interior decoration must register as an interior decoration business with the competent authority and employ professional technical personnel with certain qualifications. You can ask the business to show its interior decoration business registration certificate.

How can I check if a company is legally registered?

You can use the interior decoration business registration query on the Ministry of the Interior's "National Building Management Information System" to search by company name or registration certificate number. This site also compiles information based on that registration data, but it is still recommended to refer to the latest data on the official system.

What does the registration certificate number represent?

The registration certificate number is an identification number obtained after a business completes interior decoration business registration. The existence of the number only indicates that it has completed statutory registration, not a guarantee of project quality.

Are interior designer and interior decoration business registration the same thing?

Not exactly the same. Interior decoration business registration is for the "business (company/business name)", while professional design or construction technical personnel have their own qualification registration. Businesses undertaking decoration projects should have interior decoration business registration.

How can I confirm whether a business's registration certificate is still within the validity period?

You can query the registration certificate number on the Ministry of the Interior's National Building Management Information System, and the system will display the validity period. The registration certificate is valid for five years and must be renewed before expiration. Always refer to the latest data on the official system.

How are the qualifications of professional technical personnel on the interior decoration business registration certificate determined?

Professional technical personnel are divided into design and construction categories. According to the Building Interior Decoration Management Regulations, the design category requires an architect certificate, or a Class B or above technical certificate in building interior design and completion of professional training organized by the Ministry of the Interior with a training completion certificate; the construction category requires an architect, civil engineer, or structural engineer certificate, or a relevant technical certificate and completion of training with a training completion certificate. Detailed qualifications are subject to announcements by the competent authority.

What are the limitations on the design and construction scope on the registration certificate?

The registration certificate indicates the types of projects the business can undertake (design, construction, or both) and building use group restrictions. Businesses must not undertake projects beyond their registration scope. You can ask the business to show the registration certificate to confirm the scope.

What should I do if a business refuses to show its registration certificate?

Businesses are legally required to proactively display their registration certificate. If they refuse, you can report it to the local city/county building management authority for inquiry. This page is a neutral compilation of information and does not constitute legal advice.

How can registration certificate information help in case of disputes over interior decoration projects?

The registration certificate can confirm the business's legal qualifications, facilitating inquiries or complaints to the competent authority. If the business is not legally registered, you can report it to the competent authority. For legal disputes, it is recommended to consult professional advice. This page is a neutral compilation of information.

References (official data sources)

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Updated: 2026-07-28 · This page is a neutral compilation of information for reference only. Please refer to the announcements of the competent authority for actual registration status and regulations.