Changes in Property Values: A Data-Driven Guide to Proactive Management

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Three residential houses of varying ages and conditions in a German suburban settlement, representing changes in property values.

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(ex: Photo by

Three residential houses of varying ages and conditions in a German suburban settlement, representing changes in property values.

on

(ex: Photo by

Three residential houses of varying ages and conditions in a German suburban settlement, representing changes in property values.

on

Changes in Property Values: A Data-Driven Guide to Proactive Management

Changes in Property Values: A Data-Driven Guide to Proactive Management

Changes in Property Values: A Data-Driven Guide to Proactive Management

4 Jun 2025

10

Minutes

Federico De Ponte

Expert in Real Estate Valuation at Auctoa

4 Jun 2025

10

Minutes

Federico De Ponte

Expert in Real Estate Valuation at Auctoa

Are you wondering how the value of your property will develop in the coming years? The days of blanket price increases are over; today, data-driven facts determine profit or loss. This guide shows you how to actively shape your property's value development and make informed decisions for your future.

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The topic briefly and concisely

Market forecast 2025: Experts anticipate moderate price increases of 2% to 4%, driven by interest rate cuts and high demand in urban centres.

Energy efficiency as a key factor: Properties with energy efficiency classes A or B achieve price premiums of up to 33% compared to unrenovated properties in classes D to H.

Strategic renovation: Energy-efficient modernisations can increase property value by up to 25%; even the removal of pollutants can lead to an increase of 15-20%.

The German real estate market is undergoing a phase of realignment. After a decade of almost automatic value increases, during which residential property prices rose by about 94% from 2010 to 2022, the influencing factors are now more complex than ever. The change in interest rates, geopolitical uncertainties, and especially the energy efficiency of a property are leading to an increasingly differentiated price development. For owners, heirs, and investors, it is essential to understand the mechanisms behind these value changes. Only then can you avoid risks like a gradual loss of value and fully capitalise on your property's potential. This article provides you with the necessary data and strategies to not only maintain but actively increase your property's value.

The Most Important Points Summarized

  • Market Forecast 2025: Experts expect moderate price increases of 2% to 4%, driven by interest rate cuts and high demand in urban centres.

  • Energy Efficiency as a Key Factor: Properties in energy efficiency classes A or B achieve price premiums of up to 33% compared to unrefurbished properties in classes D to H.

  • Strategic Renovation: Energy modernisations can increase the property value by up to 25%; even just removing pollutants can result in a growth of 15-20%.

  • Location Remains Crucial: The micro-location and local infrastructure are still the key drivers for long-term value stability and increase.

Understanding Market Dynamics: The New Drivers of Property Valuation

The blanket increase in value of German real estate is a thing of the past. Current data for May 2025 shows a slight upward trend of around 3.3% for new-build houses compared to the previous year, but the market is significantly more fragmented. The European Central Bank has lowered interest rates to 2.5%, making financing easier and stabilizing demand. However, the days when every property automatically increased in value are over. Today, it is primarily energy efficiency and the micro-location that determine the future value development of your property. A moderate price increase between 2 and 4% is forecast for 2025, but it will not affect all segments equally. These new conditions require a more precise understanding of the price-forming factors.

Macroeconomic Influences: Interest Rates, Inflation, and Construction Activity

The economic environment sets the framework for the real estate market. The construction prices for residential buildings increased by 64% between 2010 and 2022, significantly higher than the general inflation of 25%. This cost pressure, coupled with a lack of building permits – only about 175,800 were issued in 2024, well below the target of 400,000 – noticeably restricts the supply. The result is high demand meeting too low a supply. At the same time, the decreased financing costs lead to a revitalisation, particularly affecting high-quality properties. This situation makes a precise professional valuation essential to determine the fair market value. Analysing these overarching trends is the first step towards a well-founded real estate strategy.

Microfactors in Focus: Why Location and Condition Determine Value

While macro trends shape the market, the concrete value is determined on the ground. The old adage "Location, location, location" still holds true, but is now expanded by a crucial component: the energy condition. Good infrastructure with connections to schools, doctors, and local amenities remains a central value driver. However, the energy efficiency class has become the new tough criterion. A study shows that properties with an energy efficiency class A or B achieve an average price premium of 20% compared to properties in classes D to H. For older buildings, this premium can even reach up to 33%. The key micro factors are:

  1. The macro location: Economic strength and development of the entire region or city.

  2. The micro location: Immediate surroundings, neighbourhood, noise pollution, and social environment.

  3. The land value: Determined by the standard land value, which was an average of 236 €/m² in 2022.

  4. The building condition: Age, building fabric, and modernisations undertaken.

  5. Energy efficiency: Energy certificate and associated future operating costs.

These factors determine whether a property is among the winners or losers of the current market corrections. A precise analysis of these points is crucial to identify an impending devaluation.


Value Enhancement through Renovation: Which Measures Really Pay Off

Given the new market situation, active value enhancement becomes a core task for owners. Energy-efficient renovations are the biggest lever in this regard. A targeted renovation can increase a property's value by up to 25%. But it's not just about energy efficiency. Even removing harmful substances like asbestos from the building structure can increase the value by 15 to 20%. A study for Munich and Hamburg demonstrates the enormous potential: In Munich alone, properties could achieve a net profit of 2 billion euros through energy-efficient renovations. The following measures offer the highest return on investment:

  • Insulation and new windows: Reduces energy consumption and improves the energy efficiency class.

  • Heating system replacement: Switching to renewable energies (e.g., heat pump) is rewarded by buyers with price premiums.

  • Modernisation of bathroom and kitchen: Design measures can bring a value increase of 10 to 15%.

  • Layout optimisation and accessibility: Creates modern living comfort and broadens the target group of potential buyers.

Despite these potentials, the renovation rate in Germany is alarmingly low at 0.69% in 2024. This presents a great opportunity for proactive owners to stand out in the market.


The risk of devaluation: Identifying and avoiding ‘stranded assets’

The flip side of the coin is the growing risk of so-called "stranded assets." These are properties whose value collapses significantly due to outdated energy standards and high renovation costs. Almost half of the properties on offer in Germany (47%) fall into energy efficiency classes D or worse. Two-thirds of all residential buildings even belong to classes D to H. These properties are often only sellable at considerable price discounts, as buyers factor in renovation costs of up to 700 €/m² to upgrade from class D/E to A+/A. Without targeted value-enhancing measures, a downward spiral threatens here. Identifying such risks is essential for long-term asset preservation.

Data-based Evaluation: The Foundation for Strategic Decisions

In such a differentiated market, gut feeling is no longer a reliable guide. To make informed decisions about selling, renovating, or holding, you need an objective, data-driven evaluation. Traditional methods like comparative or intrinsic value approaches are good, but often insufficient to capture the new, dynamic factors. Modern, AI-supported analyses can process thousands of data points – from micro-location and building condition to projected renovation costs. They enable precise pricing analysis. Do you need a quick and neutral assessment to understand the potentials and risks of your property? The Auctoa ImmoGPT chat provides you with an immediate, data-backed orientation. This establishes a solid foundation for your next steps.

value changes

The current value changes in the real estate market are not a cause for concern but rather a call for strategic action. While location remains a stable anchor, energy efficiency has become the decisive driver of value. Owners who invest in energy renovations and modernisations now can achieve significant value increases of up to 25% and safeguard their property against future risks. In contrast, passivity leads to the risk of owning a "stranded asset." Use data-based evaluation tools to clearly determine your position and implement the right measures. A well-founded strategy is key to maximising the value of your property in a changing world.

FAQ

How can I determine the exact value of my property?

For an accurate valuation, you should use a professional, data-driven analysis. Tools like the Auctoa ImmoGPT chat or a comprehensive assessment by our experts take into account all relevant factors – from the micro-location to the refurbishment backlog – and provide you with an objective basis for your decisions.

Which renovation measure brings the highest increase in value?

The highest increase in value is typically achieved through a range of energy measures, particularly the insulation of the building envelope, the replacement of windows, and the installation of a modern, renewable heating system. These investments can increase the value by up to 25%.

Should I sell my property now or hold onto it?

This decision largely depends on the condition of your property and your personal goals. If you own an energy-efficient property in a good location, a further increase in value is likely. For an unsanctioned property, you should weigh the costs of a renovation against a potential sale price with a discount. A neutral assessment can help with this decision.

How much does the location still affect the property value?

The location remains the most important factor for long-term value retention. Good connectivity, social infrastructure, and a positive environment form the foundation. However, the energy condition has become the decisive 'second' factor that determines the actual sale price within a good location.

Are property prices with poor energy efficiency continuing to fall?

Yes, the price pressure on properties with poor energy efficiency (classes F, G, H) is expected to continue. The price difference compared to efficient buildings ('brown discount') is already significant and could widen further due to legal requirements and increasing buyer awareness.

Are there grants available for value-enhancing renovations?

Yes, the federal government offers various funding programs for energy renovations through the KfW Bank and the BAFA. These include low-interest loans and direct grants, which reduce investment costs and significantly improve the profitability of value-enhancing measures.

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auctoa – Your partner for precise appraisals and certified reports. Property valuation and land valuation. With digital expertise, expert knowledge, artificial intelligence, personalised advice, and comprehensive market insights.

Made in Germany

BASED IN HAMBURG

GDPR-compliant

HOSTED IN EUROPE

auctoa – Your partner for precise appraisals and certified reports. Property valuation and land valuation. With digital expertise, expert knowledge, artificial intelligence, personalised advice, and comprehensive market insights.

Made in Germany

BASED IN HAMBURG

GDPR-compliant

HOSTED IN EUROPE

auctoa – Your partner for precise appraisals and certified reports. Property valuation and land valuation. With digital expertise, expert knowledge, artificial intelligence, personalised advice, and comprehensive market insights.

Made in Germany

BASED IN HAMBURG

GDPR-compliant

HOSTED IN EUROPE