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BKB-Sustainability Mortgage

Would you like to benefit from a substantial interest rate discount of 0.25% for your sustainable building project?


Learn more about sustainability

Then a BKB Sustainability Mortgage is the right choice.


Your advantages:

  • Interest rate 0.25 % lower than for BKB fixed mortgages
  • Interest rate can be locked in 24 months before conclusion
  • Individual terms from 2 to 10 years
  • Direct or indirect repayment via Pillar 3 possible for owner-occupied residential property

We offer BKB Sustainability Mortgages for the following areas:

MinergieNew construction or conversion of Minergie certified properties meeting one of the three standards Minergie, Minergie P, or Minergie ECO. The Minergie certificate must not be more than two years old.
GEAK (Cantonal Building Energy Certificate)
Buildings with an appropriate GEAK Label can be financed using a Sustainability Mortgage. For GEAK Class A – C. The GEAK Label must be issued by a certified expert and must not be more than two years old.
Renewable Energies

Take advantage of the opportunity to use renewable energies. The installation of a thermal solar system for hot water preparation and the installation of a photovoltaic system for power generation can be financed using a Sustainability Mortgage. Invoice copies serve as proof of the use of renewable energies.

Your advantages at a glance

Interest rate

The interest rate is fixed for the agreed term.
Current interest rates

Minimum amount

CHF 50'000.--


Direct or indirect over BKB Savings 3 Account
(only for owner-occupied residential property)

Property type

Single-family home
Storied property
Condominium or vacation home / apartment
Multiple-family home
Residential / commercial building



2 - 10 years

Maximum amount

CHF 500'000.--

Cancellation period

Not possible during the term


- The BKB Sustainability Mortgage may not be terminated during the agreed term; otherwise, the interest rate discount received must be repaid.
- The entire property must be financed through Basler Kantonalbank.