Information on Yokohama City Condominium Seismic Retrofit Improvement Promotion Project ※Application for 2024 has been closed.

Condominiums that were started with construction confirmation before the end of May 1981 and are subject to the Category Ownership Law and fall under any of the following. (changed from April 1, 2014)

• Condominiums where the division owner lives more than half of the number of dwelling units
• Condominiums with a floor area of 3 or more, excluding the basement, and a total area of 1,000 m2 or more

※　Not applicable if more than half of the total area is used for purposes other than apartment houses such as stores.

At the time of seismic retrofitting design, evaluate the validity of the seismic retrofitting plan by a seismic assessment organization (* 1) and obtain any of the following 1 to 3 certifications or confirmations as necessary (* 2) (2017 Changed from April 1)

1. Authorization of seismic retrofitting plans for buildings based on the provisions of Article 17, Paragraph 3 of the Seismic Retrofit Promotion Act
2. Building confirmation based on the provisions of Article 6, Paragraph 1 of the Building Standards Act or Article 6-2, Paragraph 1
3. Authorization of overall plans based on the provisions of Article 86-8, Paragraph 1 of the Building Standards Act

[Note]
※1 "Earthquake-resistant judgment organizations" are those who participated in the "National Network Committee for Existing Building Seismic Diagnosis and Renovation Promotion" (outside site) (external homepage) and registered based on the "Earthquake-resistant judgment committee setting registration guidelines" Refers to an earthquake-resistant judgment organization or an organization that the mayor recognizes as equivalent.
※2 In the case of seismic retrofitting design using the partial renovation system, make sure that the above certifications from 1 to 3 are not required.
[Note: Condominiums that require seismic diagnosis]
１．Emergency safety confirmation Large-scale buildings
　　Condominiums with facilities used by a large number of people as listed in Article 3, Paragraph 1 of the Supplementary Provisions of the Seismic Retrofit Promotion Act, and large-scale condominiums that meet all of the following requirements.

• Table"Applications and scale requirements subject to seismic diagnosis mandatory (emergency safety confirmation large-scale buildings required)" (PDF: 68KB)Condominiums with facilities for the use listed in the “Applicable Use” column of “Applicable Use”

• The above uses are shown in the table."Applications and scale requirements subject to seismic diagnosis mandatory (emergency safety confirmation large-scale buildings required)" (PDF: 68KB)Condominiums that exist on floors equal to or greater than the number of floors listed in the “Size Requirements” column of “Size Requirements” and whose scale is equal to or greater than the area stated in the same column

２．Buildings listed in the safety confirmation plan required
　　Condominiums along the road designated by the city as roads that should be secured in the event of an earthquake disaster, listed in Article 7, Paragraph 1, Item 3 of the Seismic Retrofit Promotion Act, and refer to those of a certain height or more, all of the following:
　　Condominiums that meet the requirements of the above.

• Table"A particularly important road among roads that should be secured during an earthquake disaster (buildings that require safety confirmation plan)" (PDF: 57KB)Condominium where the site is in contact with the road shown in

• Figure"Buildings over a certain height" (PDF: 22KB)Condominiums that meet the height requirements shown in the above

※　Before submitting a subsidy grant application, etc., submit the “Confirmation Form for Buildings subject to Seismic Diagnosis under the Seismic Retrofit Promotion Act” (Excel: 24KB) and the “Preliminary Consultation Form” (word: 35KB) to the City of Yokohama, Housing and Architecture Bureau Planning Department Building Disaster Prevention Section to confirm that they fall under 1 or 2 above.