Investing together in residential portfolios in Central Germany
Together with institutional investors and family offices we build portfolio companies that acquire and hold a pre-defined residential real estate portfolio for the long term. Structure, acquisition profile and investment criteria are defined before the first property is bought.
Rosenbaum Group is an owner-managed real estate company headquartered in Berlin with an investment focus on Central Germany. Since 2015 we have been acquiring, refurbishing, letting and managing residential real estate for long-term ownership. Co-investors benefit from our regional network, our transaction execution and an asset management function we run entirely in house.
At a glance
One pre-defined portfolio, one portfolio company
A portfolio company does not hold a single building but a portfolio whose profile is fixed before the first acquisition. Strategy, target regions, property types, condition classes and target volume are agreed jointly and set out in writing. Only then does the build-up begin.
Define the portfolio
Acquisition profile, target regions, property sizes, condition classes, financing framework and the intended investment volume are documented before subscription. Investors know what is being invested in before they commit.
Set up the portfolio company
The portfolio is bundled in a dedicated company that is legally and economically separate from the rest of our business. It holds exclusively the properties of the defined portfolio.
Build and hold the portfolio
We acquire in line with the agreed profile, refurbish, let and manage. The company grows until the defined target size is reached and then holds the portfolio for the long term.

Core markets of our portfolio companies
Central Germany, managed from Berlin
We invest where we have known the market for years: in high-growth medium-sized and regional centres in Central Germany with stable demand, a solid tenant structure and a price level that makes active asset management viable. In addition, we look at selected locations in Brandenburg.
Network, transaction execution and asset management from a single source
Acquisition, refurbishment, letting and property management sit within one organisation. This shortens decision-making, increases reliability towards sellers and keeps responsibility for the result in one place.
Regional network and off-market access
We have been rooted in Central Germany since 2015. A significant share of our acquisitions comes through direct contact with owners, property managers, banks, insolvency administrators and brokers – frequently outside open bidding processes.
Reliable transaction execution
Acquisition review, calculation, financing structure, notary appointment and handover are managed in house. We assess quickly, commit bindingly and close reliably. That reliability is a key reason why properties are offered to us.
Active asset management
We take care of refurbishment, letting, maintenance and tenant support ourselves. Value is created in operations: through reduced vacancy, orderly maintenance and stable tenancies.
Alignment of interest
We invest our own capital in every portfolio company and carry the same risks as our co-investors. We take decisions from the perspective of a fellow shareholder, not a service provider.
The key terms of a participation
The specific arrangements are defined for each portfolio company and fully documented before subscription. The following framework describes how we generally structure.
From the first enquiry to the participation
A structured process with clear steps. Each phase ends with a documented result before the next one begins.
Initial conversation
We present the company, our strategy and our track record and clarify your investment objectives, your time horizon and your requirements regarding structure, governance and reporting.
Portfolio presentation
You receive the documentation on the defined portfolio: acquisition profile, target regions, target volume, financing structure, calculation and the build-up schedule.
Review and due diligence
We provide draft contracts, calculations, reference properties and supporting documents via a secure data room. Your advisers receive access and open points are answered in writing.
Documentation and participation
The articles of association, the participation agreement and the investment criteria are finalised and executed in the required legal form.
Building the portfolio
Capital is called as required. We acquire the properties in line with the agreed profile, structure the financing and take over the management.
Management and reporting
Refurbishment, letting and administration run through our asset management. You receive quarterly reports with key figures on letting, refurbishment, maintenance and financing.
For professional investors with a long-term horizon
Co-investments are aimed at investors who see existing residential real estate as an entrepreneurial commitment and bring a multi-year time horizon.
We talk to
- Institutional investors, pension schemes and foundations
- Family offices and wealth managers
- Entrepreneurial families with real estate experience
- Portfolio holders looking to expand their exposure in Central Germany
- Professional and semi-professional investors within the meaning of the German KAGB
- High-net-worth individuals with real estate and investment experience
What a participation requires
- Willingness to make a multi-year commitment that cannot be sold at short notice
- An understanding of existing real estate involving refurbishment and letting work
- Capital that is not needed in the short term
- Engagement with entrepreneurial risks up to the total loss of the capital invested
Let us talk about a participation
A first conversation is non-binding and confidential. Tell us which portfolio size and time horizon would work for you – we will come back to you promptly.
- Confidential handling of your enquiry, with a non-disclosure agreement on request
- Documentation on current portfolios and reference properties after the initial conversation
- A contact from the management, with no intermediary layer
Investor Relations · Rosenbaum Group
Send an enquiry
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Legal notice: The content of this page is provided solely for general information about our activities and constitutes neither a public offer nor an invitation to submit an offer to acquire participations. It does not replace investment, legal, tax or financing advice. Statements on structure, region and approach describe our general approach; only the respective contractual documents of the individual portfolio company are binding. An entrepreneurial participation in real estate companies involves risks that may extend to the total loss of the capital invested. Historical key figures and references are not an indicator of future results. Offers are addressed to professional and semi-professional investors.