Real Estate / Building in Poland, house builders quote prices with foundations? [8]

We bought land a few years ago that's located 10 km South of Gdansk (between Pruszcz and Juszkowo). I'm looking for a reliable and well referenced General Contractor to give us a quote to build a modest 3 or 4 bedroom house of approximately 500 m2 to 700 m2. Does anyone have leads for reliable home builders in that general area?