Rhydonnen Uchaf is a 17th century farmhouse with a 1716 addition to the east; it is 2 storeys and attic with hipped slate roofs. It is constructed partly of stone and partly of red brick with rusticated stone quoins. There is a small amount of timber framing in the upper floor. Features include an oak stair and a stone tablet on the 1st floor inscribed "HE R 1716".

Reference: Cadw listed buildings database.