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provenum is under construction.

For owners who don’t manage their own buildings

After the purchase, your property becomes a black box.

provenum is being built to open it up again coming soon, straight from the work your property manager already does. You won’t have to manage anything yourself.

* coming soon. provenum is under construction. Get notified if you’d like to hear first.

Get notified nowWhat provenum shows, and what it doesn’t ↓

Scrolling opens the box. Inside lies a plan at 1 : 10,000.

Inside the box, today
  • How many flats are vacant?unknown
  • Has September’s rent come in in full?unknown
  • Where is the energy certificate for building 2?unknown
  • How old is the latest report?unknown
Legend · applies at every scale

What provenum shows, and what it doesn’t

Shows coming soon

  • Occupancywhich flats are let and which are vacant
  • Target and actual rentper property and month
  • Financesanything estimated is called a forecast and set in violet
  • Reportsdated the day you look
  • Documentsfiled with the property they belong to
  • Per property and for your whole portfolioat three scales: 1 : 10,000, 1 : 500, 1 : 50

provenum reads. Managing stays with your property manager.

* coming soon · More: the five views · who manages, who reads

Doesn’t show

  • What your tenants write to your property managerneither content nor count, to protect your tenants
  • Managingstays with your property manager
  • Stepping into tenanciesno button that sends a tenant anything
  • Investment adviceno advice to buy or sell
  • No promise of returnprovenum shows what is, not what it will yield

This stays in the dark on purpose: it belongs to your tenants and your property manager, not on your screen.

Plan view of a sample portfolio: seven blue properties in a city, next to a dashed property manager’s office
Fig. 1 · 1 : 10,000Sample portfolio, seven properties in one city. Blue: your properties. Dashed: your property manager. provenum shows the blue volumes, not the work done inside the dashed management office.
  • Your propertiesshown · seven, example
  • Your property managermanages, not shown

1 : 10,000Portfolio

All properties on one sheet.

Each property is a volume on the map. Where a flat stands vacant, a marker stands above the roof. No marker, everything is let. coming soon

First lever Oversight from the data your property manager works with in mieterOS – instead of the quarterly PDF coming soon

Example values in the picture

  • Property A2 flats vacant · example
  • Property C11 of 12 let · example
  • Property D1 flat vacant · example
  • Property Eall let · example
Bird’s-eye view of a sample portfolio: seven blue properties, a marker above some roofs for a vacant flat
Fig. 2 · 1 : 10,000Each marker above a roof is a vacant flat (example).

1 : 500Property

One property, up close.

Per property you see how many flats are let, target and actual rent, and the documents on the property. coming soon

From the data your property manager works with in mieterOS, not from a quarterly PDF.

Example values in the picture

  • Occupancy · 11 of 12 let1 flat vacant · example
  • Rent, September 2026target €13,680 · actual €12,540 · example
  • Document · energy certificateexample
An apartment building up close, property C, four storeys with a blue roof
Fig. 3 · 1 : 500Property C with occupancy, target and actual rent and a document (example).

1 : 50Flat

Down to the flat.

At 1 : 50 you see the single flat: whether it is let or vacant, its target rent and its documents. coming soon

Who lives there is not shown here. Nor is what your tenants write to your property manager.

You don’t have to step in. In provenum, you can’t.

Example values in the picture

  • Flat 4.2 · letnothing about the tenant · example
  • Target rent · €1,140 a monthexample
  • Documents · floor planfittings · example
Roof and front wall lifted off: a look into a furnished flat on the top floor
Fig. 4 · 1 : 50Roof lifted: a flat on the 4th floor, let, with target rent and documents, nothing about the tenant (example).

1 : 10,000Back to the whole

And back to the whole.

Because your property manager works in mieterOS, your overview builds itself along the way. Nobody writes a report for it. coming soon

How provenum connects to your property manager →

Example values in the picture

  • All on one sheet again1 : 10,000
The whole sample portfolio from above again, seen from the other side
Fig. 5 · 1 : 10,000The whole portfolio again, from the other side.

1 : 10,000Revenue

Revenue from what you hold.

Owners can share in commissions, for example when the energy of their buildings is pooled through CLEOenergy ↗. coming soon

Commissions earned are paid out proportionally.

Second lever Revenue from what you hold

More on revenue →

Example values in the picture

The sample portfolio with a dark utility connection next to each property
Fig. 6 · 1 : 10,000The properties’ energy, pooled through CLEOenergy (example).
Who it’s for

For owners who don’t manage themselves.

You own. Your property manager manages.

You want to know what happens in your properties without doing the work yourself.

Several properties, several places.

One sheet for your whole portfolio, and from there into each property. coming soon Also for family offices and owner groups with a hired property manager.

provenum shows your portfolio when your property manager works with mieterOS.

If they don’t yet, the sheet stays empty. How it connects →

An occasional look, but a complete one.

You don’t look every day. When you do, it should be today’s picture. coming soon

Not for owners who self-manage.

If you manage yourself, you need a workbench, not a window: mieter-os.de ↗

How it connects

Your property manager manages. You see it.

Who manages, who reads →

Your tenants

write to your property manager. That stays between them.

manages
Your property managermieterOS

lets, bills, files documents

reads occupancy, rent, finances, reports, documents
Youprovenum

see where things stand, per property and for your whole portfolio coming soon

provenum is under construction. Get notified.

We’ll be in touch when the first view is ready. Price: to follow.

Get notified now

* coming soon