1 Carmarthen Street, Llandeilo, SA19 6AE

1 Carmarthen Street is a three-bedroom semi-detached house in Llandeilo (SA19 6AE). It has a recorded floor area of 94 m² (around 1012 sq ft) and construction records dating it to before 1900. The latest certificate (July 2022) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in November 2008 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency dropped from Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 74). At 94 m² this is the 12th smallest of 18 units on EPC record in the building, where floor areas span 28–244 m². The building's EPC ratings span E to C across 18 units on file. Other recorded features include a basement.

At 94 m² the property is well over the postcode median (71 m² across 17 EPCs), placing it in the larger end of the local stock. It changed hands recently, sold April 2025 for £230,000. Across 2010–2025, sale prices on this property compounded at 1.8% per year. On a £-per-square-foot basis, the last sale (£227/sq ft) was about 97.2% above the typical sold price in the postcode.