What Marburg does

S+S Grundbesitz GmbH is a third-generation, family-owned real estate project developer and builder (Projektentwickler und Bauträger) headquartered in Marburg, Germany, founded in 1988. The company develops, sells, and rents residential and commercial properties, serving owner-occupier buyers, capital-investor buyers (Kapitalanlage), residential renters, and commercial tenants. Its operations are concentrated in the Mittelhessen (Central Hesse) region, with completed and active projects in Marburg, Wetzlar, Hanau, Bad Nauheim, Niederweimar, and Gießen.

The active portfolio comprises named residential developments including FOUR – Marburg Living, The Twins – Marburg, and Green Living – Niederweimar, alongside the planned Monroe Quartier in Gießen and the commercial rental offering FOUR Business. Completed reference projects include Erk's Quartier in Wetzlar (nine multi-family houses, 76 residential units, completed 2019/2021), Wohnpark Brüder-Grimm-Straße in Hanau, Rosengärten in Marburg Cappel, and Cubes and Kleeblatt in Bad Nauheim. Core construction technology emphasizes innovative building materials and current Energieeffizienzhaus-Stufen (energy efficiency) standards, with explicit focus on CO²-reduction potential across the development lifecycle. Complementary services include property financing, capital-investment advisory, a premium Platinum Edition tier, and physical showroom and model apartment (Musterwohnung) experiences.

The revenue model combines one-time property sales, recurring rental income (residential and commercial), capital-investment property sales, and financing-adjacent services. Pricing is quote-based per property and not publicly disclosed. The go-to-market is direct-to-consumer, with the company's own website (sunds24.de) functioning as a property portal, supplemented by newsletter, social media, and showroom channels. The firm has no disclosed external institutional ownership, funding rounds, partnerships, or M&A activity, and remains entirely within founding-family control.

Name

Marburg

Legal name

S+S Grundbesitz GmbH

Website

https://marburg-immobilien.de

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

101–250 employees

Short description

S+S Grundbesitz GmbH is a third-generation, family-owned real estate developer and builder headquartered in Marburg, Germany, developing, selling, and renting residential and commercial properties across the Mittelhessen region.

Ownership category

akta.pro rank

Product category

Residential Real Estate Development

NAICS

New Housing For-Sale Builders (236117), Lessors of Nonresidential Buildings (except Miniwarehouses) (531120)

SIC

General Bldg Contractors - Residential Bldgs (1520), Land Subdividers & Developers (No Cemeteries) (6552), General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE)

Keywords

• Residential property development
• Commercial real estate development
• Sustainable building construction
• Energy efficient housing
• Real estate project development

Headquarters

HQ city

Marburg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Property Sales: Sale of newly developed residential and commercial properties to end buyers, including apartments (Eigentumswohnungen) and multi-family houses.
2. Property Rental: Rental of residential and commercial properties, including the FOUR Business segment specifically marketed for rent.
3. Capital Investment Properties: Sale of investment properties (Kapitalanlage) designed as secure value investments for investors seeking returns.
4. Financing Services: Provision of property financing services to support property purchases.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

S+S Grundbesitz GmbH is a German project developer and builder that develops, sells, and rents residential and commercial real estate in the Marburg and Mittelhessen region. The company develops multi-family residential buildings and commercial properties (e.g., FOUR, The Twins, Green Living, Monroe Quartier), supplemented by services such as property financing support, capital investment advisory, a premium Platinum Edition tier, and physical showroom/model apartment experiences.

Product overview

S+S Grundbesitz GmbH is a third-generation real estate developer and builder operating across multiple regions in Germany. The company operates as a unified real estate development firm rather than a modular software platform, offering residential and commercial property development, sales, and rental services. The product portfolio comprises multiple named development projects including Four (Marburg Living and Business components), The Twins (Marburg), Green Living (Niederweimar), and Monroe Quartier (Gießen, in planning), alongside completed projects such as The Bird, Erk's Quartier, Rosengärten, Cubes, and Kleeblatt. Complementary services include real estate financing, capital investment advisory, a premium Platinum Edition tier, property listings for purchase and rental (residential and commercial), model apartment viewings, and showroom facilities. The company emphasizes sustainability through energy-efficient construction and sustainable building practices.

Differentiator

Problem solved

Functional benefit

Brands

• The Bird: Completed residential project - all units sold
• The Twins
• FOUR
• FOUR Business
• Green Living
• Monroe Quartier

Products and services

• Four - Marburg Living A residential living project in Marburg offering modern apartments for sale, developed as part of the Four complex and currently in the sales phase. Targeted at individual residential buyers seeking contemporary housing in the Marburg region.
• Four - Business Commercial real estate within the Four complex in Marburg available for rent, targeting business tenants seeking modern office or commercial space in a prime regional location.
• The Twins - Marburg Twin residential buildings in Marburg offering apartments for sale, currently in the sales phase. Targeted at residential buyers in the Marburg region.
• Green Living - Niederweimar Eco-friendly residential development in Niederweimar focused on sustainable living and energy efficiency, currently in the sales phase. Targeted at environmentally conscious residential buyers.
• Monroe Quartier - Gießen A planned residential quarter project in Gießen, currently in the planning phase and not yet available for sale.
• Finanzierung (Financing) Real estate financing services assisting buyers in funding their property purchases through the developer. Supports buyers of S+S Grundbesitz developments.
• Kapitalanlage (Capital Investment) Investment property offering positioning select developments as secure long-term value appreciation opportunities for investors seeking rental yield and capital appreciation.
• Platinum Edition Premium real estate offering and service tier targeting high-value property buyers seeking exclusive homes within S+S Grundbesitz developments.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• massa haus: German prefabricated home builder offering energy-efficient turnkey houses. Comparable product positioning around modern, energy-efficient residential construction for German owner-occupiers.
• Town & Country Haus: Germany's largest mass-market residential home builder, operating through a franchise model across hundreds of regional locations. Comparable end-buyer focus and energy-efficiency product lines, though at much greater scale and via partner model rather than direct development.
• Helma Eigenheimbau: German residential developer/builder of single-family houses, apartments, and energy-efficient residential projects (e.g., Helma Living). Directly comparable product mix including sustainable/energy-efficient residential offerings, though oriented more toward single-family than multi-family.
• Bien-Zenker: One of Germany's largest prefabricated single-family home builders, offering turnkey energy-efficient homes. Comparable as a German residential builder serving owner-occupier buyers with sustainability credentials and a regional dealer model.
• PROJECT Immobilien Gruppe: Privately-held German residential developer focused on urban B-city locations and metropolitan outskirts with new-build apartments for sale. Closely matches S+S Grundbesitz's project-developer model targeting owner-occupiers and capital investors in German regional cities.

Regional players

• Eurogrund Grundstücks- und Erschließungsgesellschaft: Privately-held German real estate developer focused on residential and commercial project development, particularly in Hesse and surrounding regions. Direct geographic and product overlap with S+S Grundbesitz in the German Mittelstand developer space.
• TERRA Grundbesitz: Privately-held German residential project developer active in multiple German regions. Comparable project-developer model focused on residential new-build for sale to end-buyers and investors.
• Zech Group: Privately-held German real estate developer with significant residential and mixed-use project activity across German regions. Comparable as a privately-held multi-project German developer with a similar integrated developer-builder model, though active in larger cities.

Broad incumbents

• Bonava: German/Swedish residential developer building apartments and detached houses in German B-cities and metros. Directly comparable as a multi-region project developer for sale to end-buyers and investors, with overlapping energy-efficiency positioning.
• Instone Real Estate Group: Publicly listed German residential developer developing new-build apartments and quartiers across Germany's top metropolitan regions. Larger, nationally diversified counterpart to S+S Grundbesitz; useful for comparable valuation and project economics on German new-build residential.

Market position

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/marburg

Revenue estimate

Valuation estimate

Number of profiles

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 Marburg