What WinBau does

WinBau GmbH is a privately held, family-owned residential real estate developer headquartered in Biberach an der Riß, Baden-Württemberg, Germany. Founded in 1998 by Wolfgang Winter, the company builds, sells, and rents multi-family residential properties within the Biberach region. Active listings include a rental row house at €1,050 per month and a four-room apartment for sale at €250,510, indicating a small but operationally diversified portfolio spanning build-to-sell and build-to-rent assets.

The company's core technical approach centers on energy-efficient construction using groundwater heat pump technology, which leverages renewable geothermal energy for heating and cooling. WinBau operates through three revenue-generating segments: direct property sales to owner-occupiers and capital investors, long-term rental of its own developed properties, and a rental management service branded "WINTER Premium" that manages residential properties for third-party owners. Adjacent services include acquisition of building plots and older residential properties for redevelopment, plus complementary construction services.

WinBau is led by two managing directors—founder Wolfgang Winter and Marco Winter—and operates exclusively within the Biberach catchment area. Revenue derives primarily from one-off property sales (high-ticket, low-frequency transactions) supplemented by recurring rental income and management fees. As a small family-run GmbH with no disclosed external investors, no publicly available funding history, and a website last refreshed in July 2018, the company presents a low public-visibility profile consistent with regional German property developers of its size, limiting inbound institutional interest and external data coverage.

Name

WinBau

Legal name

WinBau GmbH

Website

https://winbau.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1–10 employees

Short description

WinBau GmbH is a family-owned residential real estate developer in Biberach, Germany, building and selling multi-family properties with groundwater heat pump technology, while offering rental management services to local buyers and investors.

Ownership category

akta.pro rank

Product category

Residential Real Estate Development

NAICS

New Housing For-Sale Builders (236117), Residential Property Managers (531311)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Residential General Contracting (New Build) (IMAFAAAB)

Keywords

• Residential property development
• Multi-family housing construction
• Real estate sales
• Rental management services
• New construction apartments

Headquarters

HQ city

Biberach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Property Sales: WinBau sells newly constructed residential properties directly to buyers. Properties include apartments and row houses. The company operates as a 'Bauträger' (developer), selling directly from the builder without buyer commissions.
2. Property Rentals: WinBau rents out residential properties including row houses and apartments, generating recurring rental income.
3. Vermietservice (Rental Management Service): Under the WINTER Premium brand, the company offers rental management services for capital investors including full tenant care ('Rundum-Mieterbetreuung').

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

WinBau GmbH develops, constructs, and directly sells or rents residential properties — apartments and row houses — in Biberach, Germany, building with energy-efficient features such as groundwater heat pumps. The company also offers a Vermietservice (rental management service) under the WINTER Premium brand, providing full tenant care for capital investors who purchase its properties.

Product overview

WinBau GmbH is a real estate development and property management company based in Biberach, Germany. Founded in 1998 by Wolfgang Winter, the company has evolved from single-family home construction to becoming a developer of multi-family residential buildings. The company's core offerings consist of rental apartments (Wohnungen zur Miete), apartments for sale directly from the developer (Wohnungen zum Kauf without buyer commission), land acquisition for development (Grundstücke), and the WINTER Premium rental management service. All properties are located in and around Biberach. The company is led by two managing directors: Wolfgang Winter (Dipl.-Ing. FH) and Marco Winter (Dipl.-Kaufmann TU München, DEKRA-certified property appraiser).

Differentiator

Problem solved

Functional benefit

Products and services

• Rental Apartments (Wohnungen zur Miete) Residential rental properties including apartments and row houses in Biberach, Germany, offered directly from WinBau as landlord to individuals and families seeking to rent a modern, energy-efficient home.
• Apartments for Sale (Wohnungen zum Kauf) Newly built apartments and multi-family units sold directly by developer WinBau to buyers in Biberach with no buyer commission, including features such as underfloor heating, elevator, groundwater heat pump, and modern finishes.
• Land Acquisition (Grundstücke) WinBau's outreach and acquisition of buildable plots of land in the Biberach area to feed its pipeline of new residential construction projects, marketed as 'WIR SUCHEN Grundstücke' on its website.
• Vermietservice — Rental Management Service (WINTER Premium) Full-service rental management ('Rundum-Mieterbetreuung') offered by WinBau via its WINTER Premium brand for capital investors and landlords, covering tenant sourcing, care, and ongoing rental administration of the investor's Biberach property.

Quantifiable outcome

• Energy efficiency rating of 22.5 kWh/m² achieved through groundwater heat pump technology

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• LEG Immobilien AG: German MDAX-listed residential real estate company managing ~160k apartments, primarily in North Rhine-Westphalia. Comparable to WinBau's WINTER Premium rental management offering and small landlord-handling operations, though operating as a portfolio residential owner rather than as a new-build developer.
• TAG Immobilien AG: German MDAX-listed residential real estate company with a large apartment portfolio across northern and eastern Germany. Comparable to WinBau on the residential rental management side (WINTER Premium) and asset-light property stewardship, but at vastly larger scale and with a buy-and-hold (not develop-and-sell) model.
• Deutsche Wohnen SE: Major German residential real estate company (now part of the Vonovia Group), managing a large Berlin-focused apartment portfolio. Comparable to WinBau on the rental property management and large-landlord dimensions, though focused on portfolio ownership in urban Germany rather than new-build sales in southern micro-markets.
• Vonovia SE: Germany's largest residential real estate company, owning and managing ~500k+ apartments nationwide. Overlaps with WinBau on the rental management and large-scale landlord dimensions (particularly relevant for the WINTER Premium service) but operates as a portfolio landlord rather than a developer focused on new-build sales.

Direct peers

• Kondor Wessels Holding GmbH: Bochum-based German residential real estate developer building new-build apartments and townhouses in regional German markets. Closely comparable to WinBau on residential new-build/sales and multi-family construction, with a similarly mid-sized regional footprint versus national or international peers.
• Bauwert AG: Berlin-headquartered German residential developer focused on new-build multi-family housing in German city markets. Closely comparable to WinBau's core activity of constructing and selling new apartment buildings, though operating at a higher project volume and broader regional footprint.
• ACCENTRO Real Estate AG: Berlin-listed German residential real estate company specializing in apartment sales to owner-occupiers and buy-to-let investors, including forward sales of newly built units. Closely aligned to WinBau's direct-to-buyer sales-and-rental-management model in owner-occupied and investor segments, though at larger scale and primarily in Berlin/Brandenburg.
• Bonava Deutschland GmbH: German arm of Swedish-listed Bonava AB, one of the leading residential developers in Germany. Builds and sells new multi-family housing in German metropolitan areas with a vertically integrated developer business model closely aligned to WinBau's Bauträger approach, but at materially larger scale and with broader geographic reach.
• Instone Real Estate Group AG: Frankfurt-listed German residential developer (Bauträger) building new apartments and townhouses across major German cities, including Baden-Württemberg. Most comparable in business model to WinBau: develops new multi-family residential properties for sale to owner-occupiers and investors, but at significantly broader geographic and capital scale.

Regional players

• SAGA Siedlungs-Aktiengesellschaft Hamburg: Hamburg's municipal residential housing company managing over 130,000 apartments. Directly comparable to WinBau on residential property management, multi-family rental operations, and acting as a long-tenured regional housing supplier, but serves a different region (Hamburg vs. Biberach) and operates at municipal scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 WinBau