The design fee varies depending on the type of building and total construction cost, but as a general guideline, it ranges from approximately 7% to 12% of the overall construction cost.

For residential buildings:

• Around 12% for projects up to ¥30 million

• Around 10% for projects up to ¥50 million

For churches:

• Around 7–9% for projects up to ¥80 million

• Around 6–8% for projects up to ¥150 million

These are only rough estimates and may vary depending on the specific design requirements.
For clinics and senior welfare facilities, the percentage is generally similar to that of churches.