It is located in Bang Rak District, on the eastern bank of the Chao Phraya River, and is served by Soi Charoen Krung 30 (also known as Captain Bush Lane).
Following the Fall of Ayutthaya in 1767 and the subsequent establishment of Thonburi and Rattanakosin as Siam's successor kingdoms, the Portuguese resettled in the new capitals, in the area of today's Bangkok.
By 1875, the unfinished structure had deteriorated, and the consulate hired Italian-Austrian architect Joachim Grassi to rebuild it within a time frame of five months.
Other foreign missions, including those of Britain and France, would also be established nearby, and the area became a centre of the European expatriate community during the turn of the 19th–20th centuries.
The floor plan is rectangular, with a central front porch and gable projecting from the hipped roof demonstrating Neo-Palladian influence.
On the upper floor, the central porch has three arched windows, divided by pilasters, above which the coat of arms of Portugal decorates the gable.
[1][2] Among the decorative objects in the residence are a pair of carved wooden doors from at least the 18th century, which had been brought from the original Portuguese settlement in Ayutthaya.
[8][4] Retaining the original wooden structural work, metal and glass now frame the modern and "chic" offices, as well as the Portuguese Cultural Center's classroom, library and resources centre on the lower floor.
The embassy works on supporting the small community — numbering about 1,750 people as of 2022 — of Portuguese nationals in the region, as well as promoting bilateral relations in culture, commercial activity, tourism and academia.