3 Emerald Street, Blackburn, BB1 9QJ

3 Emerald Street is an end-of-terrace house in Blackburn (BB1 9QJ). It has a recorded floor area of 66 m² (around 710 sq ft), construction records dating it to 1900-1929 and council tax band A. At 66 m² this is the 3rd smallest of 9 units on EPC record in the building, where floor areas span 55–81 m². The building's EPC ratings span E to C, with this unit at the top. On EPC score it ranks first in the building (76 versus a worst of 54). The latest certificate (January 2026) shows a C (score 76), near the top of the C band. The rating has held steady at C across 2 certificates since May 2024. Between certificates, wall efficiency went from Average to Good, roof efficiency went from Average to Very Good and hot-water efficiency went from Good to Very Good; while window efficiency dropped from Good to Average and lighting dropped from Very Good to Good. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.

Today's modelled estimate of £116,000 is 60.7% below the 2025 sale of £295,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£415/sq ft) was about 293.3% above the typical sold price in the postcode. Most recent transfer was July 2025 at £295,000 — fresh data. Its energy rating outperforms most of the postcode (better than 88% of similar EPCs).