Network · Berlin and Brandenburg
Know good firms before you need them.
Renovation before the sale, the move after the purchase: for this, we maintain a network of firms we have worked well with. We take on new partners when performance and conduct are right.
For firms and service providers
Become a partner
Takes a minute. We will get back to you within a few working days.
Which trade do you offer?
Where do you work?
How long has your firm been in business?
Who may we contact?
Please provide your company, phone number, email address and consent.
Enquiry noted!
We will get back to you within a few working days.
Your details go to BBI Immobilien. We use them solely to process your partner enquiry. Information in the Privacy policy (German).
Member for over 20 years 
BBI is part of NAI apollo. The company has four locations: Frankfurt am Main, Munich, Berlin and Rotkreuz. NAI Global adds 325+ partners worldwide. In the NAI Partners Germany alliance, seven independent partner companies with over 200 specialists work at ten locations in Germany (information from nai-apollo.de, retrieved on 13/09/2026).
The network
The trades we work with.
Property managers
For owners' associations and rental buildings. Managers are the first to know the condition of a building.
Building trades
Electrical, plumbing, painting, drywall, flooring, locksmiths. From repairs to complete renovation.
Energy and heating technology
Photovoltaics, heat pumps, heating modernisation, insulation.
Architecture and planning
Conversions, floor plan changes, loft conversions and preliminary planning enquiries to the building authority (Bauvoranfrage).
Experts and surveyors
Building condition, damp damage, pollutants and valuation reports that go further than our own assessment.
Kitchen specialists and interior fit-out
Kitchen planning and furnishing after the purchase, to suit the floor plan.
Removals and clearance
House clearances and inheritance cases, when a house has to be cleared before the sale.
Financing and insurance
Financing for buyers, property insurance for owners.
For firms
You run a firm and want to become a partner?
We are mainly looking for: property management, building trades, energy technology, architecture, removals and interior fit-out, in Berlin and nearby Brandenburg.
- Enquiries with a specific reason. Clients who come to you through us have just bought, sold or renovated.
- A direct line. One dedicated contact person on our side.
- Visibility. If you wish, we mention you to clients by name when your trade fits.
- Collaboration in both directions. You are in owners' buildings before a sale is on the table.
- A registered business with the qualifications required for your trade and business liability insurance.
- Availability and a response within a few working days.
- Transparent quotes with a clear scope of work.
- A way of dealing with clients that we don't have to apologise for.
Special cases
For property managers and for owners.
For property managers in particular
We work more closely with management companies because our tasks overlap. It is about changes of ownership, the value of individual flats, court-ordered administration (Zwangsverwaltung) and inheritance cases.
Conversely, management companies know the actual condition of a building: which resolutions the owners have passed, how much money has been set aside for repairs and what is coming up. What buyers should check before the notary appointment is covered in the article on the notary appointment and land register.
And for owners, this means
You don't have to use our network. If you have your own tradesperson you are happy with, that is the better choice.
Frequently asked questions
Partners and cooperation: frequently asked questions.
Answers as of 22 September 2026
Does a recommendation cost me anything?
No. You instruct and pay the firm directly. If, in an individual case, we receive money from a partner, we tell you before the contact is made.
Is BBI liable for the partners' work?
No. The contract and the warranty exist solely between you and the firm. Our recommendation is based on our own experience. It replaces neither comparing several quotes nor your own checks.
What criteria do you use to choose partners?
Based on actual collaboration: the result, availability and conduct must have been right. Anyone who repeatedly disappoints does not stay in the network.
I'm a property manager. How does a collaboration work?
It starts with a conversation about where our work overlaps: changes of ownership, the value of individual flats, inheritance cases and sales from an owners' association. After that, it is usually clear whether a regular collaboration makes sense.
Do I get exclusive jobs as a partner?
No. We usually name one or two suitable firms to clients, and the decision lies with the client.
Want to discuss working together?
One minute in the form or a phone call.