Abercamlais is a country house at Trallong in the Usk valley between Brecon and Sennybridge in Powys, Wales.

Possibly dating back to the Middle Ages, it underwent various alterations and additions during the eighteenth and nineteenth centuries accounting for all or most of what may be seen today.

[3] The base of the pigeon house forms a bridge over a stream, and was fitted out as a latrine, a device Scourfield and Haslam consider, "simplicity itself, with useful and ornamental qualities into the bargain".

[2] The gardens attached to the house extend on both sides of the Usk and are connected by a grade II*-listed Elizabethan three arch stone bridge,[4] and a Grade II-listed wrought iron suspension bridge,[5] constructed by Crawshay Bailey in the middle of the nineteenth century.

[8] A walled garden north of the brook,[9] the stables,[10] and a lodge at the head of the drive are all listed at Grade II.