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Current Situation Our Approach References Compensation Kontakt
Confidential · For Professional Real Estate Investors Only
Higher Cashflows and Sales Proceeds
in Whole-Building and Individual Sales through

20–35% Rent Increases within Existing Tenancies.

Consensual and socially responsible rent adjustments as a value-add instrument for portfolio optimisation in the German residential market. Fully legally secure – independent of local rent indices and rent increase caps.

100%
Performance-Based
No costs without results
27%
Avg. Rent Increase
across all projects
View Reference Projects
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Market Situation

Blocked Value Development
despite attractive locations.

Regulatory restrictions and a structural rent gap between existing and new tenancies leave significant potential systematically untapped.

01
Rent Discrepancy
A significant gap between existing rents and achievable re-letting rents – the market potential exists but is structurally inaccessible.
02
Restrictive Regulation
The local rent index (Mietspiegel), the rent increase cap (15–20% over three years) and the rent brake (Mietpreisbremse) make significant rent increases in existing portfolios near impossible on a legally secure basis.
03
Suboptimal Financing Structure
Low actual rents lead to weaker valuations, higher LTVs and a restricted lending base. Banks apply grey-zone rents at a discount.
04
Legal Risk & Value Discounts
Rents not established on a legally secure basis create a permanent contestation risk – with direct consequences for repayment claims and achievable sale prices in both individual and portfolio disposals. Untapped rent increase potential further reduces proceeds.
Our Service

Structured Portfolio Optimisation
through individual tenant dialogues.

Avg. Investment per Unit
1–2K€
Max. 3× the annual rent increase
Rent Increase
20–35%
In existing portfolios, without vacancy
For large increases
Phasing over 1–3 years possible
Optional conversion
Index / stepped rent
Win-Win Principle
100%
Voluntary · Consensual · Legally Secure

We conduct individual conversations with existing tenants and jointly develop rent adjustments that are sustainable and beneficial for both parties – voluntary, consensual and contractually binding.

What many don't know: the German Civil Code (BGB) expressly permits landlord and tenant to mutually agree a new rent level during an ongoing tenancy – independent of local rent indices and rent increase caps (§ 557 para. 1 BGB). Since the tenant can decline the offer at any time and no unilateral enforcement is possible, voluntariness is not merely our principle – it is the legal prerequisite for the validity of the agreement.

The result: a documented, legally secure agreement free of contestation risk – accepted by banks as a reliable rental basis and placing the value development of your portfolio on solid ground.

Comparison

Conventional Rent Development
vs. Our Optimisation Strategy.

Conventional Rent Development
Our Optimisation Strategy
Kriterium
Conventional Rent Development
Our Optimisation Strategy
Rent Development
Dependent on tenant churn
Independent of tenant churn
Increase Potential
Limited by rent index & rent increase cap
20–35% Rent Increase in Existing Portfolios
Legal Security
Contestation risk upon re-letting
Legally secure rent levels – no contestation risk
Financing
Restricted lending base
Improved LTV basis
Exit
Discounts due to contestation risk
Clean exit, higher disposal proceeds
Predictability
Uncertain business plans
Reliable cashflow forecasts
Our Approach

Socially Responsible
by conviction, not obligation.

We see ourselves as a mediator developing consensual solutions between landlords and tenants. The foundation is dialogue at eye level, respectful conduct and active listening.

⚖️
Fairness
Balanced consideration of all parties' interests and adherence to agreed terms.
🔍
Transparency
Open and honest communication about possibilities and limitations – without exception.
🤝
Professionalism
Consistently respectful and appreciative conduct with all parties in every situation.
🔒
Discretion
Confidential handling of all information from all parties – landlords and tenants alike.
💬
Empathy
Understanding of different perspectives and life situations as the basis of every conversation.
✋
Voluntariness
All decisions are made autonomously and without the creation of any threatening or pressurising situations.
Strictly Prohibited
  • Threats of any kind
  • Misleading or false statements
  • Exertion of psychological pressure
  • Unannounced demands for a meeting
  • Disregard for tenants' right to self-determination
In the event of justified complaints, we will immediately exercise our contractual rights.
Reference Projects

Proven Results
across diverse German markets.

Hamburg
71% Success Rate
Eligible Units 28
Conversations Conducted 28
Consensually increased 20
Avg. Rent Increase 65%
Avg. CapEx per Unit 2.000 €
Additional Cashflow p.a. 54.800 €
Value Increase 959.000 €
32% Yield-on-Cost
Stuttgart
86% Success Rate
Eligible Units 72
Conversations Conducted 61
Consensually increased 53
Avg. Rent Increase 41%
Avg. CapEx per Unit 2.200 €
Additional Cashflow p.a. 152.131 €
Value Increase 2.738.361 €
32% Yield-on-Cost
Leipzig
83% Success Rate
Eligible Units 10
Conversations Conducted 6
Consensually increased 5
Avg. Rent Increase 27%
Avg. CapEx per Unit 1.000 €
Additional Cashflow p.a. 5.832 €
Value Increase 102.060 €
31% Yield-on-Cost
Hannover
83% Success Rate
Eligible Units 6
Conversations Conducted 6
Consensually increased 5
Avg. Rent Increase 19%
Avg. CapEx per Unit 1.000 €
Additional Cashflow p.a. 6.800 €
Value Increase 120.000 €
32% Yield-on-Cost
Regional Presence

Nationwide Coverage
across all relevant markets.

We are active in Germany's most important residential markets – from metropolitan regions to mid-sized cities with high rent increase potential.

Deutschland Karte Hamburg Rostock Berlin Hannover Wolfsburg Magdeburg Bielefeld Dortmund Düsseldorf Köln Kassel Leipzig Dresden Frankfurt Mannheim Nürnberg Stuttgart Augsburg München
Fee Structure

100% Performance-Based.
No result, no cost.

Included Services
Full-Service
Portfolio Optimisation
We manage the entire process – from initial analysis to the handover of legally secure documentation.
  • Analysis & identification of eligible units
  • Assessment of rent increase potential per unit
  • Joint goal definition & project planning
  • Individual tenant conversations on-site
  • Contract drafting & legally secure implementation
  • If required: housing benefit guidance for tenants
  • Documentation of all measures & results
  • Handover of legally secure documentation
Our Fee Model
Fully performance-dependent
Transparent and proportional to the rent increase achieved. Together towards the best outcome.
0€
No rent increase achieved?
Zero costs – regardless of effort.
📋
Regardless of the outcome you will receive a full documentation of all conversations conducted – including reasoning and assessments for units where no consensual agreement was reached.
Potential Calculator

What Potential Remains
in Your Portfolio?

Enter your key figures and see immediately what additional cashflow and market value a consensual rent increase could create for your portfolio.

Your Key Figures
m²
€/m²
€/m²
%
x
Status Quo
Avg. Rent / m²
7,00 €
Annual Net Cold Rent
84.000 €
Market Value
1.680.000 €
After Optimisation
Avg. Rent / m²
8,38 €
Annual Net Cold Rent
100.575 €
Market Value
2.011.500 €
Your Increase
Rent Increase
+19,6%
Additional p.a.
+16.575 €
Value Created
+331.500 €
About Us

Background &
Experience.

Max-Wilhelm Stiller
  • — Several years of experience as an Investment Professional in the German residential real estate market
  • — Experience across private equity, listed and institutional investors
  • — Strategic focus on value-add portfolio development and privatisation
  • — Over €300m in acquisition volume advised

"The greatest untapped potential rarely lies in the acquisition – it lies in the existing portfolio. In practice, value development frequently fails due to dependence on tenant churn and the narrow constraints of regulation. This is precisely where we act: with an instrument that creates real value which would otherwise have remained entirely out of reach."

Max-Wilhelm Stiller

Ready to Unlock
Your Portfolio's Potential?

We analyse your portfolio and demonstrate concretely which rent increases are realistically achievable.

Request Assessment

Confidential · Non-binding · For Professional Investors Only