Primary market - developer investment
Osiedle Kostrowskiego
ul. Sierż. A. Kostrowskiego, Kobyłka, woj. mazowieckie
Osiedle Kostrowskiego is a development by DARBUD DEVELOPER Sp. z o.o., Sp. Kom. in Kobyłka. The asking-price register lists 2 residential units with a price: 2 2-room units. Prices start at 529 000 zł, with a median of 9716 zł/m². Planned completion of construction works: 31/10/2026. Difference against 3 nearby developments within 1,5 km: +16,4%.
With a mortgage (20% down): instalment from ~2701 zł/mo. An estimate, not a credit offer.
Development plot · 617 m² total (ULDK cadastre)
Prices by room count
| Rooms | Units | Area | Price from | Median |
|---|---|---|---|---|
| 2 rooms | 2 | 55,4–58,6 m² | 529 000 zł | 9716 zł/m² |
Units in this investment
2 residential units with a listed price
1 · 55,4 m² · 2 rm
529 000 zł9547 zł/m²
2 · 58,6 m² · 2 rm
579 000 zł9884 zł/m²
| No. | Area | Rooms | Floor | Price | zł/m² | Reservation |
|---|---|---|---|---|---|---|
| 1 | 55,4 m² | 2 | — | 529 000 zł | 9547 | |
| 2 | 58,6 m² | 2 | — | 579 000 zł | 9884 |
Developer - registry facts
- KRS
- 0000783886
- Registered
- 2019
- Phone
- +48 508 208 200
- Developer website
- kostrowskiego4.pl
- Escrow account
- Open - funds released in tranches during construction
- Planned completion of works
- 31/10/2026
- Completed projects listed in the prospectus
- 4
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Nearby developments
3 developments within 1,5 km, median 8345 zł/m². This investment: +16,4% vs neighbours.
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Find my developmentFrequently asked questions
- How much does an apartment in Osiedle Kostrowskiego cost?
- The cheapest unit in the asking-price register costs 529 000 zł, and the median price is 9716 zł/m². These are the developer asking prices, not transaction prices.
- What floor areas are available?
- Units range 55,4–58,6 m². The register lists: 2 2-room units.
- How many apartments are still for sale in Osiedle Kostrowskiego?
- Of 2 priced units, 2 are not marked as sold in the register. Developers update the status with a delay, so treat this as indicative.
- Who is the developer behind Osiedle Kostrowskiego?
- The development is run by DARBUD DEVELOPER Sp. z o.o., Sp. Kom. (KRS 0000783886). Data comes from the developer asking-price register and the KRS company register.
- When is construction planned to finish?
- The developer states 31/10/2026 in the prospectus. Escrow account: Open - funds released in tranches during construction.
- Are prices here higher than nearby?
- The median here is 9716 zł/m², against 8345 zł/m² across 3 developments within 1,5 km.
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Check a listingData comes from the developer asking-price registry (dane.gov.pl, housing price transparency act) and official registries (KRS, MF). Asking prices - not transaction prices. History covers the period since Mieszk.pl started tracking this investment. This is not investment or real-estate advice.