3 Tyddyn Iolyn

3 Tyddyn Iolyn is a pair of single-storey cottages built in a simple vernacular revival style, featuring attics in gabled wings that project on either side of a lower central range. The cottages are constructed from roughly coursed rubblestone with quoins and slate-stone voussoirs, topped by a large slate roof that has deep overhanging verges and carved purlin ends. The symmetrical front has a layout of 1:2:1 bays, with each cottage comprising a gabled wing and half of the central range. The original window openings have slightly cambered heads and slate cills, with three lights in the gables and two lights in the center, each light containing six panes. The windows in the left cottage (No.3) have been replaced with plastic. There is a narrow ventilation slit at the apex of each gable. Entrances are through narrow gabled porches located at the returns of the gabled wings, each featuring a prominent ridge stack with a stone base and twin diagonal brick shafts topped with stepped capping. Additionally, there are two 20th-century rooflights in the outer roof slope of the left gabled wing and a 20th-century flat-roofed addition at the rear of No.2. The interior was not inspected during the survey.