Sustainability is no longer an option – it is a market and regulatory requirement. In 2025, buyers and investors are starting to look at energy efficiency and environmental practices as decisive factors in a property’s value, and not just as ‘extras’.
What does a sustainable property mean?
A sustainable property is one that combines design, materials, and technologies aimed at reducing environmental impact and improving the quality of life of its occupants.
Main characteristics:
• Energy certification A or A+
• High-performance thermal and acoustic insulation
• Renewable energy systems (solar panels, geothermal)
• Recyclable or low-impact materials
• Home automation for efficient management of consumption (lighting, climate control, water)
Legislation and European trends
The European Union has been reinforcing rules in the construction sector through the Energy Performance of Buildings Directive (EPBD). The goal is clear: by 2030, all new buildings must be “nearly zero-emission buildings” (NZEB).
This means that properties without adequate energy certification may lose market value, while more efficient ones tend to be increasingly sought after.
Impact on value and demand
• Immediate appreciation: sustainable properties can be worth up to 20% more at the time of sale
• Reduced operating costs: significantly lower energy and water bills
• Access to more favorable financing: several banks already offer green mortgages with more competitive spreads for A-class properties or higher
• Attraction of foreign buyers: international investors consider sustainability a key decision criterion
Benefits for investors
• Greater liquidity in the resale market
• Reduced operating costs in rentals
• Compliance with future legal requirements, protecting the asset’s value
• Improved image and reputation among environmentally conscious clients