Kalter Sp Z O O

What Kalter Sp Z O O does

Kalter Sp. z o.o. is a Polish general contractor (Generalny Wykonawca) founded in 2004 and headquartered in Białystok, with a regional office in Warsaw. The company delivers complete general contracting services for residential multi-family buildings, commercial facilities, and public utility construction across eight Polish voivodeships (Mazowieckie, Łódzkie, Podlaskie, Małopolskie, Dolnośląskie, Śląskie, Opolskie, Wielkopolskie). Over 22 years of operation, Kalter has completed 143 investments representing 400,000 m² of delivered usable floor space, including notable projects such as Horyzont Praga (18,976.78 m²), Osiedle na Woli Etap IX (29,284.60 m², 301 units), and Moja Młynowa (21,055.80 m²).

Kalter's business model is project-based B2B contracting: revenue is generated by winning construction contracts from property developers and real estate investors and executing the full construction lifecycle through to handover. Pricing is quote-based and tailored to each project's scope and specifications, with a dedicated Sales department and Warranty Service function supporting the customer relationship. The company operates with no proprietary technology platform beyond standard construction execution, no AI or software products, and no subsidiaries, financing rounds, or parent company relationships. Customer engagement is direct enterprise sales to developer clients; visible counterparty logos include Cordia, DEVELIA S.A., YIT Development, LC Corp, HI Projekt, NAPOLLO, NP, and Warszawa Eko-Park, alongside affiliated Kalter Nieruchomości project vehicles.

The company is privately held, Polish-domiciled (legal entity KALTER sp. z o.o.), and has accumulated reputational capital through repeated recognition in business rankings including Diamenty Forbesa (2010 and 4th place in Podlaskie in 2026 for firms above 250M PLN revenue), multiple Gazele Biznesu awards (2008, 2024, 2025), Skrzydła Biznesu (2015), and Złota Setka (34th in Podlasie in 2025). Governance formalization has progressed with publication of a tax strategy and a whistleblower protection procedure compliant with Poland's 2024 Whistleblower Protection Act.

Name

Kalter Sp Z O O

Legal name

KALTER sp. z o.o.

Website

https://kalter.pl

Company type

Private

Founded year

2004

Operating status

Operating

Short description

Kalter Sp. z o.o. is a Polish general contractor delivering residential, commercial, and public utility building construction for property developers across eight voivodeships, with 143 completed projects totaling 400,000 m² over 22 years.

Ownership category

akta.pro rank

Headquarters

HQ city

Bialystok

HQ country

Poland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. General Construction Contracts: Revenue is generated through construction contracts as a General Contractor (Generalny Wykonawca) for building projects. Projects include residential multi-family buildings, commercial buildings, and public utility construction. Revenue is project-based and earned as construction progresses.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Kalter Sp Z O O is a Polish construction company that operates as a General Contractor (Generalny Wykonawca) for building investments. The company delivers complete general contracting services for residential multi-family buildings, commercial buildings, industrial facilities, and public utility structures across eight Polish voivodeships. Kalter manages the full construction lifecycle from foundation to completion for property developer and investor clients.

Product overview

Kalter Sp z o.o. is a construction company serving as a General Contractor (Generalny Wykonawca) for building investments. The company provides general construction contracting services for residential and public utility buildings. Their single unified service offering encompasses the complete construction lifecycle including residential buildings, industrial facilities, and commercial structures. The company operates across multiple Polish voivodeships (Mazowieckie, Łódzkie, Podlaskie, Małopolskie, Dolnośląskie, Śląskie, Opolskie, and Wielkopolskie) and maintains offices in Białystok and Warsaw.

Differentiator

Problem solved

Functional benefit

Products and services

• Generalne Wykonawstwo (General Contracting) General contracting services for residential multi-family, industrial, and commercial building construction projects. Kalter manages full project delivery as General Contractor for property developers and real estate investors across eight Polish voivodeships.

Quantifiable outcome

• 143 completed investment projects
• +2 more outcomes

Named customers10 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Property Developer Clients (Kalter Nieruchomości, DEVELIA, HI Projekt, Cordia, Napollo, LC Corp, YIT, NP, Warszawa Eko-Park)coreStrategic or Co-development PartnerKalter serves as General Contractor (Generalny Wykonawca) for property developer clients, executing construction projects based on their investment specifications. Developers commission Kalter for the complete construction delivery of residential and commercial buildings.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Budimex S.A. Poland's largest general contractor and a Ferrovial subsidiary — operates across building, infrastructure and real estate development, serving many of the same developer clients as Kalter but at materially larger scale.
• Skanska S.A. (Poland): Polish operations of Swedish contractor Skanska — executes residential, commercial and public buildings across Poland with broader geographic and segment reach than Kalter, competing for the same developer contracts.

Direct peers

• Porr S.A. (Poland): Austrian-headquartered construction group with substantial Polish operations in building construction — competes for the same general contracting contracts from Polish developers.
• Mostostal Warszawa S.A. Polish general contractor with strong Warsaw presence executing residential, commercial and industrial building construction — comparable segment mix and competitive overlap in Mazowieckie.
• Strabag Sp. z o.o. Polish subsidiary of Austrian Strabag SE executing building construction projects across Poland — comparable general contracting model competing for developer-led multifamily work.
• Warbud S.A. Major Polish general contractor (VINCI Construction subsidiary) executing residential, commercial and public buildings nationwide — directly comparable on project type, scale and contract model.
• Mirbud S.A. Polish general contractor executing residential, commercial and industrial building projects — similar scale and contract model to Kalter, competing for the same developer-led pipeline.
• Hochtief Polska Sp. z o.o. Polish arm of German contractor Hochtief delivering residential, commercial and public buildings — directly comparable on project type and target customer (Polish property developers).
• Erbud S.A. One of Poland's largest general contractors serving residential, commercial, industrial and energy clients with similar general contracting model and direct overlap on developer-driven multifamily projects.
• Unibep S.A. Polish general contractor focused on residential, commercial and public utility buildings, with comparable geographic reach and similar general wykonawstwo positioning — directly overlaps with Kalter's core offering.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Kalter-Sp-z-o-o-438369212943366
• LinkedInlinkedin.com/company/kalter-sp-z-o-o

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 Kalter Sp Z O O