What SB5ÜNF does

SB5ÜNF GmbH (legal entity SB 5 UG (haftungsbeschränkt) & Co. KG) is a Berlin-headquartered German specialty construction services firm founded by Felix Sommer in 2004. The company focuses on visible concrete (Sichtbeton) cosmetology, repair, and restoration, operating across nine integrated service lines including SB5ÜNF Beton, Sanierung & Bau, Naturbau, Engineering, Rustikal, Beratung & Coaching, Entwicklung, Holz & Grün, and Häuslebauer-Buddy. Its underlying technical capability rests on SIVV-certified concrete repair techniques, proprietary surface treatment and coloring systems, and sustainable natural building materials (hemp lime, clay, recycled concrete), developed over nearly 20 years and applied to projects ranging from garden sheds to football stadiums and the Neue Nationalgalerie Berlin.

SB5ÜNF generates revenue through project-based professional services fees, with quotes provided on a per-project basis depending on scope, surface area, and complexity. Go-to-market is sales-led, targeting architects, property developers, construction companies, building owners, and (via Häuslebauer-Buddy) private homeowners, supported by direct project inquiries routed to specific team members, Felix Sommer's university lectures at institutions including Berlin University of Applied Sciences and TH Nuremberg, and a recently published reference book "Beton und Nicht Beton" (JOVIS Verlag, April 2024). The firm maintains a marquee reference list including the Futurium Museum, Phaeno Wolfsburg, Staatsbibliothek Berlin, and partnerships with RECKLI GmbH, Baumschlager Eberle Architekten, and MarteMarte Architekten.

Operational scale as of fiscal year 2021 included 86 employees, 150,000 m² of surface area treated, 270 active construction sites, and 300,000 anchor cones closed. The company's geographic footprint spans Germany with international project execution including Denmark. Distribution is direct, with national operations from Berlin headquarters and additional locations in Jessen and Buckautal (Dretzen). The firm's news page references preliminary insolvency proceedings, indicating active financial restructuring alongside ongoing operations.

Name

SB5ÜNF

Legal name

SB 5 UG (haftungsbeschränkt) & Co. KG

Website

https://sb-5.de

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

1–10 employees

Short description

SB5ÜNF is a Berlin-based German specialty construction firm specializing in visible concrete (Sichtbeton) cosmetology, restoration, and sustainable natural building services, serving architects, developers, construction companies, and private homeowners across Germany and selectively internationally with project-based professional services.

Ownership category

akta.pro rank

Product category

Concrete Restoration and Sustainable Construction Services

NAICS

Commercial and Institutional Building Construction (236220), Poured Concrete Foundation and Structure Contractors (23811), Architectural, Engineering, and Related Services (5413)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), Heavy Construction Other Than Bldg Const - Contractors (1600), Services-Engineering Services (8711)

akta.pro primary industry

Concrete Pavers, Hardscape & Retaining Wall Systems (IMADAAAE)

Keywords

• Visible concrete services
• Concrete restoration
• Natural building materials
• Construction engineering
• Sustainable renovation

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Infrastructure, Technology or R&D

Revenue model

1. Concrete Cosmetology and Restoration Services: Project-based professional services for visible concrete cosmetics, repair, and restoration including Betonretusche, Betonlasuren, Graffitischutz, Hydrophobierung, and Schutzsysteme. Revenue is generated through one-time project fees based on scope, surface area, and complexity.
2. Engineering and Consulting Services: Construction engineering services including planning phases 1-9, construction management, supervision, damage assessment, and quality management. Provided as standalone consulting or bundled with execution services.
3. Rural Revitalization and Development (SB5ÜNF Baut): Property renovation and development services targeting rural/suburban areas, including finding properties, renovation with sustainable materials, and resale. Revenue generated through property development margin and renovation fees.
4. Private Construction Services (Häuslebauer-Buddy): Services for private homeowners including floor coatings, furniture restoration, garden structures, and custom concrete/wood/metal kitchen countertops.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

SB5ÜNF provides specialized visible concrete (Sichtbeton) cosmetology, repair, and restoration services, alongside comprehensive renovation, sustainable natural building (clay, hemp lime, recycled concrete), construction engineering, and project management services. The firm operates through nine integrated service lines covering concrete treatment, restoration, natural construction, engineering, heavy construction work, material development, wood and green construction, consulting, and private home-builder support.

Product overview

SB5ÜNF is a German construction company offering a comprehensive portfolio of specialized services under nine integrated product lines, unified by their expertise in visible concrete (Sichtbeton) and sustainable construction. The core offering centers on SB5ÜNF Beton for concrete cosmetology and repair, complemented by SB5ÜNF Engineering for planning and supervision, and SB5ÜNF Rustikal for heavy construction work. The company extends its capabilities through SB5ÜNF Naturbau (natural building with clay, hemp lime), SB5ÜNF Sanierung & Bau (renovation and construction), SB5ÜNF Entwicklung (sustainable material development), and SB5ÜNF Holz & Grün (wood and green construction). SB5ÜNF Beratung & Coaching provides consulting services while SB5ÜNF Häuslebauer-Buddy serves private home builders. The company operates with nearly 20 years of experience, completing over 3,500 projects across Germany and internationally.

Differentiator

Problem solved

Functional benefit

Products and services

• SB5ÜNF Beton

Quantifiable outcome

• 150,000 m² of surface area treated in a single fiscal year (2021)
• +3 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Five partnerships are on record, tiered notable, core and flagship.

• Baumschlager Eberle ArchitektennotableStrategic or Co-development PartnerLong-term collaboration with prominent Austrian architecture firm Baumschlager Eberle Architekten, led by Prof. Gerd Jäger. The partnership involves visible concrete cosmetics and restoration work on their projects.
• MarteMarte ArchitektennotableStrategic or Co-development PartnerOngoing collaboration with Austrian architecture firm MarteMarte Architekten, including the Deutschlandhaus restoration project praised by firm owner Stefan Marte.
• RECKLI GmbHcoreTechnology or IntegrationStrategic partnership with RECKLI GmbH, a formwork and concrete materials manufacturer. CEO Lutz Hammer describes the SB5ÜNF team as 'artists' with passion for concrete as a material, highlighting mutual respect and collaboration.
• HanfbaukollektivnotableStrategic or Co-development PartnerCollaboration with hemp building collective and Hanffaser Uckermark for development of hemp lime (Hanfkalk) Sichthanfbeton construction materials.
• Kulturhof DretzenflagshipStrategic or Co-development PartnerCo-founding and operating the Kulturhof Dretzen, a living showroom and event venue showcasing SB5ÜNF's work with sustainable materials. The cultural estate is also used as a co-working place. Founded by Felix Sommer and his wife Anke Sommer.

Scale indicators8 records

Recent moves10 records

Expansion highlights5 records

Broad incumbents

• Knauf Gips KG: Large German family-owned building materials group spanning plasterboard, plasters, and finishing systems. Compares to SB5ÜNF through its Sanierung & Bau and Naturbau service lines, particularly in sustainable/eco plasters and natural building solutions.
• Sika AG: Swiss global leader in construction chemicals, including concrete repair mortars, waterproofing, and protective systems. Operates at vastly larger scale than SB5ÜNF but addresses the same customer needs in concrete restoration and surface protection.

Others

• Doka GmbH: Austrian formwork and scaffolding specialist serving concrete construction projects globally. Adjacent to SB5ÜNF's visible concrete work through the formwork side of Sichtbeton quality, but a supplier/enabler rather than direct service competitor.
• RECKLI GmbH: German manufacturer of architectural formliners and textured concrete surfaces. Not a direct competitor but a strategic partner and adjacent technology supplier to SB5ÜNF's visible concrete work, with overlapping aesthetic-design focus.
• Max Frank GmbH & Co. KG: German manufacturer of concrete construction products including spacers, formwork accessories, and reinforcement technology. Adjacent ecosystem player to SB5ÜNF's concrete construction and engineering services rather than a direct service competitor.

Direct peers

• Triflex GmbH & Co. KG: German manufacturer of liquid-applied coatings and sealants for concrete and building surfaces. Overlaps with SB5ÜNF's hydrophobization and protective systems offerings for architectural and infrastructure projects.
• MC-Bauchemie Müller GmbH & Co. KG: German family-owned construction chemicals company specializing in concrete protection, repair systems, and surface treatment. Comparable to SB5ÜNF in technical positioning and target segments (concrete restoration contractors and specifiers).
• KÖSTER Bauchemie AG: German specialist in waterproofing and concrete protection/repair systems. Comparable niche positioning to SB5ÜNF, focused on building envelope and structural concrete restoration in the German-speaking market.
• Sto SE & Co. KGaA: German-headquartered global leader in building coatings, facades, and concrete restoration systems. Closely comparable to SB5ÜNF on the concrete restoration and surface-treatment side, with broader product portfolio but overlapping customer base of architects and developers.
• Remmers GmbH: German construction chemicals specialist with a strong focus on concrete repair, restoration mortars, and protective coatings — directly overlapping with SB5ÜNF's core concrete cosmetology and Sanierung services.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@sb5unf
• Facebookfacebook.com/SB5UENF
• Instagraminstagram.com/sb5uenf
• Pinterestpinterest.com/sb5uenf
• LinkedInlinkedin.com/company/sb5%C3%BCnf

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SB5ÜNF