Overview
Inst-Sanit has been a general contractor for sanitary and mechanical installations since 1991. It builds and renovates heating, water and sewage, fire protection, gas, refrigeration and ventilation systems, and prepares technical designs and investor cost estimates for residential, public and industrial buildings.
- ul. Bolesława Krzywoustego 79/1, 70-245 Szczecin
Financials
Revenue history (in m)
Filing timeliness
No financial statement for 2025 – the filing deadline has passed. 5 of 6 financial statements were filed late (the longest delay 543 days for 2021). 4 of 6 audited by a statutory auditor.
- 2025not filed
- 202413/05/2025
- 202314/10/2024
- 202209/01/2024
- 202109/01/2024
- 202001/12/2021
The statements for 2025 report only zeros (no activity).
Data and insights are generated automatically from financial statements – they may contain errors and are neither a credit assessment nor business advice.
Statistics
How the company ranks by revenue within its industry, region and across Poland in 2025.
Results vs industry
Industry
Offer
- Heating installations
- Water and sewage installations
- Fire protection installations
- Gas installations
- Refrigeration installations
- Ventilation installations
- Technical installation designs
Authorized Representatives
Manner of representation
Each member of the management board is authorised to represent the company independently.
Ownership
| Owner | Shares | Share value | Stake |
|---|---|---|---|
Katarzyna Aldona Kalkowskaage 46 | 5,700 | $76,985.41 | 50% |
Paweł Kalkowskiage 47 | 5,700 | $76,985.41 | 50% |
Katarzyna Aldona Kalkowska and Paweł Kalkowski hold a combined 100% – the ownership structure indicates family control.
Beneficial owners
| Person | Rights |
|---|---|
Bank accounts
Registered as a VAT taxpayer on 2018-03-01.
92 1240 1112 1111 0011 4198 7793- 69 1240 1112 1111 0011 4200 7607
- 51 1240 1112 1111 0011 6391 1404
Debt
No entries in the National Debtors Register (KRZ).
Public aid
| Grant date | Purpose | Gross amount | Granting body | |
|---|---|---|---|---|
| Jun 24, 2026 | De minimis aid (in accordance with Commission Regulation 2023/2831) | –– | Prezes Banku Gospodarstwa Krajowego |
Regulatory authorisations
| Authority | Type | Status | |
|---|---|---|---|
 BDO | BDO register entry | Active |
Competitors
| Name | Revenue | Website | ||
|---|---|---|---|---|
| ANC Systemsp. z o.o. | $29,899,788.88 | ancsystem.pl | ||
| Clima Komfortsp. z o.o. | $12,950,637.13 | climakomfort.pl | ||
| Instal-Miodsp. z o.o. | $12,545,829.86 | instal-miod.pl | ||
| Zakład Instalacji Sanitarnych I Budownictwa Ogólnegosp. z o.o. | $10,859,924.13 | zisibo.pl | ||
| Cool Prosp. k. | $10,278,421.40 | coolpro.pl | ||
| Pilgazsp. z o.o. | $10,247,860.60 | pilgaz.pl | ||
| Drosansp. z o.o. | $8,763,005.96 | drosan.pl | ||
| Q-Install sp. z o.o.sp. k. | $6,807,012.17 | q-install.pl | ||
| Inpronaft SanokS.A. | $5,953,173.83 | inpronaft.pl | ||
| Wojewódzki Instalacjesp. z o.o. + limited partnership | $5,937,597.74 | wojewodzki.com.pl |
Change history
| Date | Event | |
|---|---|---|
| 2020-02-28 | Address change (Ul. Zgrupowania Ak "żmija" 4, 01-875, Warszawa → Ul. Aleja Fryderyka Chopina 167 A, 05-092, Kiełpin) | |
| 2020-02-28 | Share capital increase (50,000.00 PLN → 570,000.00 PLN) | |
| 2018-02-14 | Entered in the register |
FAQ
Last updated: 2026-08-19