BNK / BNG Costs: What Factors Determine the Expenses for Sustainability Certification?

The costs for BNK (Assessment System for Sustainable Small-Scale Residential Construction) or BNG certification essentially consist of two components: the official fees charged by the certification body (BiRN) and the fees charged by the appointed auditor. Since BiRN’s certification fees are fixed, the total cost varies primarily based on the individual amount of the auditor’s fee.

Key Factors Affecting the BNK/BNG Auditor’s Fee

It is recommended that you discuss the fee with the auditor in advance in a transparent and customized manner. The fee is determined based on various parameters depending on the project:

• Size, type, and scope of the construction project (e.g., single-family home vs. larger residential building)

• Complexity of the design and the materials used

• Timing of Involvement (Early-Stage Construction Oversight vs. Retrospective Document Review)

Why Investing in BNK/BNG Certification Can Be Worth It

With the BNK or BNG certificate, you lay the foundation for the government’s QNG seal. Once BiRN has verified compliance and issued the quality seals, simply submit them to KfW to secure the attractive funding available through the “Climate-Friendly New Construction” program.

Your Path to Transparent Cost Estimation

Since every construction project is unique, it is not possible to provide a flat-rate final price. We recommend that you speak directly with a qualified auditor to receive a customized quote tailored specifically to your building and your QNG requirements.