Garreg War memorial was designed in 1922 by Sir Clough Williams-Ellis, architect, to commemorate those of his Plas Brondanw estate and village lost in the First World War; it was subsequently adapted to incorporate the names of those who also fell in the Second World War, which included his son Lt. Christopher Williams-Ellis of the Welsh Guards. The monument is on the site of Clough's proposed St Brothen's Hall of 1911 which was never executed. He gave the land and paid part of the construction costs.

The memorial is a two-and-a-half storeyed tower of square plan, the walls tapering slightly towards a staged top. It has a sloped pyramidal stone roof with staged top and applied bronze swags to each face. The tower is surmounted by a flaming urn finial of reconstituted stone. There are plain, square-headed openings to each face on 3 levels. Of those to the ground floor, that to the left contains a standing metal memorial tablet to those lost in the Second World War, whilst that to the right has a similar tablet commemorating those lost in the First World War.

Reference: Cadw listed buildings database.
RCAHMW, 2009.