WALLROUND Raises €4.2 Million to Digitize the European Renovation Process

Company Snapshot
Berlin-based startup WALLROUND is tackling one of Europe’s toughest real estate challenges: the fragmented and inefficient process of energy renovation. By combining technology, data, and operational execution, WALLROUND delivers a full-stack digital platform that simplifies how property owners and investors plan, procure, and deliver energy-efficient retrofits. As the EU tightens its decarbonization and energy-efficiency mandates, WALLROUND’s approach positions it at the intersection of climate tech, construction, and real estate transformation.

WALLROUND Raises €4.2 Million to Digitize the European Renovation Process

Subtitle:
Revent leads €4.2M Seed round to accelerate WALLROUND’s integrated platform for energy-efficient building retrofits across Germany and Europe.

Intro
Between August 19–22, 2025, WALLROUND, a Berlin-based renovation technology startup, announced a €4.2 million Seed round led by Revent, with participation from GGF, Vonovia, KVL Group, Founders Factory, S&B Capital, Superangels, and angel investor Marc Müller.

Founded in 2024, WALLROUND is building an end-to-end renovation management system designed to handle every stage of a property retrofit, from digital assessment and planning to procurement, construction, and quality assurance. The company was founded by Lukas Steinhilber (CEO), Tatiana Wotzasek (CPO), and Henning von Oesen (Head of Projects), who bring deep experience in real estate, product development, and operational execution.

With Germany and the EU under pressure to meet ambitious energy-efficiency and carbon-reduction targets, WALLROUND’s platform aims to streamline a complex and fragmented process, helping property owners modernize at scale while ensuring ESG compliance.

What WALLROUND Does
WALLROUND offers a tech-enabled, full-service renovation platform that digitizes and automates every phase of an energy retrofit project.

Process Flow: Property Analysis → Planning → Procurement → Construction → Quality Assurance

Key Features:

• Digital Property Assessments: Evaluate ROI, CO₂ savings, and cost implications of retrofit options.

• Automated Planning & Procurement: Standardized workflows reduce manual input and accelerate approvals.

• Execution Oversight: On-platform project tracking ensures quality control and contractor accountability.

The new funding will support deeper automation, expansion of the tech and operations teams, and rollout across Germany. The round was reportedly oversubscribed, signaling strong investor confidence in WALLROUND’s market fit.

Who It’s Best For
WALLROUND serves stakeholders leading Europe’s energy-renovation movement.

Target Segments:

• Private landlords and residential property owners

• Institutional investors and property funds with ESG mandates

• Developers and retrofit specialists focused on energy-efficient upgrades

Key Use Cases:

• Energy-efficient modernization of aging housing stock

• Planning and execution of mandated renovations

• Simplifying regulatory compliance and ESG reporting

• Portfolio-wide decarbonization

Deployment Fit:
The platform combines SaaS-based workflow management with field-level project oversight, ideal for portfolio-scale renovation management. Initially focused on Germany, WALLROUND plans to expand across continental Europe.

Traction

• Oversubscribed €4.2M Seed round

• Full-stack platform under development

• Active discussions with German residential portfolio operators

• Positioned to support compliance with EU energy-efficiency directives

Team

• Lukas Steinhilber (Co-founder and CEO): Entrepreneurial background; experienced in scaling operations.

• Tatiana Wotzasek (Co-founder and CPO): Product leader with cross-sector expertise in digital platforms.

• Henning von Oesen (Co-founder and Head of Projects): Specialist in construction operations and project delivery.

Investors

• Lead Investor: Revent

• Other Investors: GGF, Vonovia, KVL Group, Founders Factory, S&B Capital, Superangels, Marc Müller (angel)

• Total Funding to Date: ~€4.2 million

How to Get in Touch

• Website: wallround.de

• Headquarters: Berlin, Germany

• Contact: Via website contact form

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• Enerbrain: AI-based energy optimization for buildings.

• Qarnot: Heat reuse and smart building infrastructure.

• 1Komma5°: End-to-end energy system integrator for residential retrofits.

• Ecoworks: Prefabricated façade and retrofit systems for multifamily buildings in Germany.