From Victory Monument BTS (closer than Phaya Thai BTS), take north-west exit, walk clockwise one quarter around the traffic circle, then walk about 600 m westwards on Ratchawithi road ถนนราชวิถี. You will see the palace on the north side of the road, good view of the palace from the pedestrian overpass.
Every day 9-16. You can see the park and buildings, but entrance to the rooms only during guided tours. Cafe de Norasingh นรสิงห์ open every day until 19.
Sat and Sun 9:30 and 13:30 (I took the Sat 13:30 tour, it lasted over 2 h, a bit long when you understand only a fraction.).
Tue and Thu 10:00 and 14:00 (written notice) or 13:00 (asked tour guide)?
Tours in English available on request in advance.
I come from BTS Victory Monument and walk along Ratchawithee road until I see the palace. The entrance gate is closed and the exit gate is half open, and I have to step over a chain that prevents mocys from passing, making it feel like trespassing. But I have only five minutes until tours starts, and there are people around, so I go in there.
Tour starts on time 13:30, about 30 attendees. You can enter all room, I took pictures before or after the masses were in the room. Some areas still under renovation.
Tours ends around 16:00, about 10 attendees left. Then our tourguide opens the donation box at reception and invites everyone to help counting, and she takes the small notes and coins to the adjacent museum shop to exchange into larger notes.
Afterwards have a drink and a meal in Norasing cafe. Reasonably prices and great atmosphere!
Verdict: A jewel of architecture and interior design, easily accessible, free entry.
Copyright 2014 ChristianPFC