LONDON–(BUSINESS WIRE)–Improving investor sentiment narrows the office yield gap between London and major regional markets, according to data from CoStar, a global leading provider of online real estate marketplaces, information and analytics in the property markets. Based on a three-quarter trailing average, London’s transaction-based office yield rose 50 basis points to 6.5% in Q1 2026, up from 6% in Q4 2025 and a recent low of 5.8% in Q3 2025. “Average office yields outside London fell sli