key4 – investment property financing |

A mortgage for your investment property

Are you looking for financing for your property? That’s lucky. Because at key4, you will receive several attractive offers with just one request.

Interested in sustainable financing?

What you can expect from key4

Always at your side

We assess and broker requests and take care of the entire administration.

Several offers

With one request you will receive several attractive offers.

Transparent costs

There are no hidden costs. You only pay fees if you take out a mortgage.

How can I find attractive mortgages?

How can I find attractive mortgages?

Our process

We bring mortgage borrowers and investors together in a very simple manner, whilst taking care of the entire administration.

Request from the mortgage borrower

The mortgage borrower submits a request for a mortgage.

Financing assessment

We carefully assess each financing request according to our internal guidelines.

Activation on the platform

If the financing request meets the guidelines, the loan request will be processed on the platform.

Establishment of offers

Offers will be established from investors.

Forwarding of the offer

key4 forwards the offers from investors to the mortgage borrower.

Contract signature

The mortgage borrower reviews the various offers and makes a decision. We then take care of all the administration, coordinate the signature of the contract and the payout of the mortgage.

Borrower UBS Investor

Is your investment property suitable for key4?



Type of property

Completed multi-family units and properties for commercial use


One pledged object per request (incl. total pledge)

Financing structure

Fixed-rate mortgage or fixed-rate mortgage combined with a SARON Flex mortgage

Loan amount

From CHF 1 000 000


2–20 years, can be combined with a SARON Flex mortgage

What clients say about us

Quality at excellent conditions

Thomas Graf
Owner and Managing Director of Graf AG General-/Totalunternehmung

High level of transparency, first-class interest rates

Béatrice Schaeppi
Managing Director and General Partner of Schaeppi Grundstücke Verwaltungen KG

Clear structure, simple comparison

Bruno Gerber
Financial Officer of Baugenossenschaft Berna

Would you like to invest in mortgages?

We bring mortgage holders and investors together and take care of the administration. Invest in investment properties or in owner-occupied residential property.

Straight to a non-binding interest rate indication

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