The reconstructed chateau, which currently serves as a retirement home, stands on the square in Pysel. It is owned and managed by the Prague City Council. The chateau is originally a Renaissance building with a square ground plan from the 16th century, with significant Baroque alterations and additions made in the 18th century and a new Classical façade from the 19th century. In front of the chateau is a Baroque sculpture of St. John of Nepomuk, also by Ignác František Platzer. The chateau is surrounded by the chateau park, which will be revitalised and opened to the public. The interior of the chateau is accessible to visitors of Pyšelj only during open days.
It is a large area with a chateau, a spa, a park, houses No. 5, No. 6, No. 7 and a fence wall with a gate. The two-storey building of the chateau on a square plan with an adjacent tower and romantic facades is older, rebuilt after 1820 and at the beginning of the 20th century.
The castle building has a Renaissance layout. The Renaissance origin of the outer walls is evidenced by the sgraffito rustication uncovered during the reconstruction of the facades. The late Renaissance construction was carried out by the highest land judge Karel Mračský of Dubá, who owned Pyšely in 1586-1623. The chateau also acquired a Baroque appearance, with the central wing above the whole building being raised. The existence of a chapel in the right wing is documented, with a portal from the second half of the 18th century. Around 1820, a second floor was built over the side wings and a tower was built (demolished in 1838). The facades and numerous interventions in the interior of the castle date from this period. The central hall of the 1st floor was mainly modified. The classicist alterations were probably carried out by the architect Zacharias Fiegerth. The newly erected neo-Gothic tower dates from the second half of the 19th century. The interiors were modernised at the beginning of the 20th century.
The extensive grounds of the castle adjoin the south side of the village square. It includes the residential building of the castle, the farm part at the gate to the village square, the castle park, the adjacent forest park and two houses adjacent to the castle wall towards the village square. On the area of the monument there is the unprotected St. Joseph's shelter No. 112. To the south of the chateau, outside the conservation area, there is a large farmyard historically belonging to the chateau.