Kallco

What Kallco does

KALLCO Development GmbH & Co KG is a Vienna-based residential property developer (Bauträger) founded in 1987, operating since 2017 as a subsidiary of WAG Wohnungsanlagen Gesellschaft m.b.H. The company develops, plans, and manages residential properties in Vienna and the Vienna metropolitan area, delivering a full-service offering from land acquisition through construction to handover. It has completed more than 2,500 units over its history and currently holds a pipeline of approximately 1,300 affordable rental apartments in the Oberes Hausfeld urban development area (Vienna 22nd district), alongside recently delivered projects such as com11.3 (318 apartments), PAUL&INA (137), com20 KAY (128), and com22PLUS (163).

The company's core technical differentiation sits in two registered patents: KLIMA LOOP® and KLIMA LOOP®PLUS, which provide climate-neutral heating, cooling, and hot water using geothermal energy, outside air, and photovoltaic power, without fossil fuels or district heating. These systems are deployed in more than 500 apartments and integrated with the SliM Building® construction method (licensed from Dr. Winfried Kallinger) for flexible floor plan design and faster build cycles. The combination has earned multiple klimaaktiv GOLD certifications, DGNB GOLD pre-certification, ÖGNI Gold, and IBA_Wien project status.

Kallco generates revenue through three streams: property development and sale of residential units (one-time, project-tied), rental income from owned and managed properties (recurring, with current listings at €687–€1,810 per month), and general planning and project management services for institutional and private investors (fees). The customer base combines end-user renters and buyers with major institutional investors — ERSTE IMMOBILIEN KAG, Bank Austria Real Invest, UNIQA Real Estate, Value One, and parent company WAG — providing project capital and long-term property holding partnerships. The company is registered as a limited partnership in Vienna (FN 480310p) and operates with a small, focused team of 1-10 employees.

Name

Kallco

Legal name

KALLCO Development GmbH & Co KG

Website

https://kallco.at

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

1–10 employees

Short description

Kallco is a Vienna-based residential property developer (founded 1987, WAG subsidiary) specializing in sustainable apartment construction using its patented KLIMA LOOP® geothermal system, serving institutional investors and end-user renters across the Vienna metropolitan area.

Ownership category

akta.pro rank

Product category

Residential Real Estate Development

NAICS

Real Estate Property Managers (53131), Residential Property Managers (531311), Lessors of Real Estate (5311)

SIC

General Bldg Contractors - Residential Bldgs (1520), Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Master-Planned Community & POA Management (BPAJAHAD)

akta.pro secondary industry

Build-to-Rent (BTR) Community Management (BPAJAFAC)

Keywords

• Residential property development
• Sustainable real estate
• Geothermal building systems
• Affordable housing development
• Construction project management

Headquarters

HQ city

Wiener Neustadt

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Property Development and Sales: Kallco develops residential properties (rental apartments, condominium ownership) and sells them to investors or end customers. Revenue generated from property sales at completion.
2. Rental Income: Kallco holds and rents out developed properties, generating recurring rental income.
3. General Planning and Project Management Services: Kallco provides development, general planning, and project management services to investors (institutional and private) for a fee. Services include land acquisition, complete planning with architects, project execution, and defect-free handover at guaranteed fixed prices and fixed dates.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Kallco is a Vienna-based property developer (Bautr\u00e4ger) that develops, plans, and constructs residential and commercial real estate, primarily in the Vienna metropolitan area. The company sells and rents residential apartments directly to end users and develops large-scale residential projects for institutional investors, providing a full-service package from land acquisition through planning, construction with its proprietary KLIMA LOOP\u00ae geothermal systems, and defect-free handover at fixed prices and dates. It also provides general planning and project management services to private investors on a fee basis.

Product overview

KALLCO Development GmbH & Co KG is a Vienna-based real estate developer and one of Austria's leading property developers (Bauträger). The company's product portfolio centers on two proprietary patent technology systems: KLIMA LOOP® and KLIMA LOOP®PLUS for climate-neutral geothermal heating and cooling, and SliM building® for flexible construction planning. These systems are deployed across their residential development projects in Vienna, primarily under the 'com' series branding (com11.3, com20•KAY, com22PLUS, QUARTIER 11). The current flagship development is hausfeld22 in Oberes Hausfeld (Vienna 22), featuring the LUMINA and Nordlicht apartment complexes. KALLCO operates as both developer for its own projects and as general planner/developer for institutional investors (ERSTE IMMOBILIEN, WAG, UNIQA, Value One, Bank Austria Real Invest). The company focuses on affordable rental housing with high sustainability standards, primarily in Vienna.

Differentiator

Problem solved

Functional benefit

Brands

• KLIMA LOOP®: Patented heating and cooling system using geothermal energy, outdoor air and solar power for sustainable building energy supply.
• KLIMA LOOP®PLUS
• Smart Tech – Low Cost

Products and services

• hausfeld22 LUMINA Rental Apartments New-build rental apartments in the Oberes Hausfeld urban development area (Vienna 22), with two-room apartments starting at approximately \u20ac687-\u20ac850 per month including operating costs. Targets individuals and families seeking affordable rental housing in Vienna.
• hausfeld22 Nordlicht Rental Apartments First residential building in the Oberes Hausfeld urban development area at Alfred-Grasel-Gasse 18, offering new-build rental apartments (54-97 m\u00b2, approximately \u20ac1,070-\u20ac1,810 per month) equipped with KLIMA LOOP\u00aePLUS for climate-neutral heating, cooling, and hot water from geothermal and photovoltaic sources.
• com11.3 (INA) Residential Complex Completed residential complex at Rosa-Jochmann-Ring 12-16 / Leberweg 11, Vienna 11, featuring 318 freely financed rental apartments, one community room/coworking space, and underground parking, equipped with KLIMA LOOP\u00ae and a 151 kWp PV system achieving klimaaktiv GOLD certification. Developed for institutional investor ERSTE IMMOBILIEN KAG.
• com22PLUS Subsidized Rental Housing Pioneer IBA_Wien project in the Berresgasse city quarter featuring 163 subsidized rental apartments with the KLIMA LOOP\u00aePLUS patent system for climate-neutral heating, cooling, and hot water. Located at Maria-Emhart-Weg 12, Robert-Parzer-Weg 20+22, Sonja-Hajek-Weg 7+9, Vienna 22.
• com20 KAY Residential and Commercial Building Residential and commercial building at Engerthstra\u00dfe 61-63, Vienna 20 (Brigittenau), featuring 128 freely financed rental apartments, commercial spaces, and underground parking. Equipped with KLIMA LOOP\u00ae and achieved DGNB GOLD pre-certification and \u00d6GNI Gold certification. Developed in partnership with Value One.
• QUARTIER 11 Residential Complex Completed residential complex in Vienna 11 Simmering at Simmeringer Hauptstra\u00dfe 170 and Gattergasse 2A, featuring 325 rental apartments, a doctor's practice, kindergarten, and underground parking. Developed for Bank Austria Real Invest Immobilien-KAG and achieved klimaaktiv GOLD certification.
• General Planning and Project Management Services Full-service development package for institutional and private investors, covering land acquisition, complete planning with architects, project execution, and defect-free handover at guaranteed fixed prices and fixed dates. Serves as a 'Rundum-Sorglos-Paket' (full-service package) for partners such as ERSTE IMMOBILIEN, Bank Austria Real Invest, UNIQA, WAG, and private Austrian investors.

Quantifiable outcome

• Heating and cooling costs remain the same as previous heating costs alone, while providing year-round thermal comfort
• +3 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature4 records

Partnerships

Four partnerships are on record, tiered major and minor.

• Value OnemajorStrategic or Co-development PartnerStrategic project partnership for KAY project (com20) in Vienna-Brigittenau. Value One provides land ownership, financing, and construction commitment, while Kallco provides development, general planning, and project management expertise.
• UNIQA Real Estate Management GmbHmajorStrategic or Co-development PartnerProject partnership for large-scale residential development in Vienna-Penzing. UNIQA Real Estate provides land and financing, with Kallco handling development, general planning, and project management for approximately 10,000 m² of usable space.
• Swietelsky AGmajorImplementation/ SI/ Consulting PartnerConstruction company partnership for Oberes Hausfeld developments. Swietelsky serves as general contractor for multiple Kallco projects including Nordlicht, Lumina, and Westwind.
• St. Anna KinderkrebsforschungminorOthersCharitable recipient of Kallco's annual 'Tag des Gebens' (Giving Tuesday) donations. Kallco redirects its Christmas gift budget to support cancer research for children.

Scale indicators5 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• Glorit: Vienna-based residential property developer focused on sustainable, high-quality apartment buildings in the Vienna metropolitan area. Highly comparable to Kallco in terms of geographic focus, product type (rental and condominium residential), and emphasis on energy-efficient construction.
• WertInvest: Vienna-based residential property developer active in subsidized and privately financed housing in Vienna. Comparable to Kallco in target customer base (institutional investors and subsidised housing providers) and Vienna-centric development approach.
• Raiffeisen Immobilien: Austrian real estate brokerage and development arm of the Raiffeisen banking group, active in residential development across Austria. Comparable to Kallco in institutional investor ties, residential product focus, and Austrian market presence.
• Soravia Group: Austrian real estate group active in residential and mixed-use development across Austria and selected international markets. Comparable to Kallco as a multi-project residential developer with similar institutional client base and urban development focus.
• Strauss & Partner: Austrian property developer specializing in residential real estate in Vienna and surrounding areas. Comparable to Kallco in scale, target market, and product mix (urban residential development with institutional investor partners).
• SÜBA Bau: Austrian residential property developer focused on owner-occupied and rental apartments primarily in Vienna and Graz. Comparable to Kallco in product focus (sustainable urban residential) and business model of working with institutional capital partners.

Broad incumbents

• PORR AG: Major Austrian construction and real estate development group. Comparable to Kallco via its real estate development activities, though PORR's scope is far broader, encompassing infrastructure, commercial, and residential across multiple European markets.
• CA Immobilien Anlagen AG: Listed Austrian real estate company specializing in office, residential, and hotel properties across Central Europe. Comparable to Kallco in Austrian residential exposure but operates with substantially greater scale and a public listing.
• STRABAG Real Estate: Real estate development subsidiary of STRABAG SE, one of Europe's largest construction groups. Comparable as a broader Austrian and European residential/commercial developer with substantially greater scale and capital resources than Kallco.
• IMMOFINANZ AG: Listed Austrian real estate investment and development company focused on residential, office, and retail. Comparable to Kallco in residential development activity but operates at significantly larger scale with a public capital base.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Kallco