Buildings account for over one-third of global energy use and CO₂ emissions, with emissions rising as floor space growth outpaces efficiency gains, making deep renovation essential. The EU’s recast Energy Performance of Buildings Directive (Directive (EU) 2024/1275) requires zero-emission standards for new public buildings by 2028 and all new buildings by 2030, introduces minimum energy performance standards for the worst-performing non-residential stock (16% by 2030, 26% by 2033), and establishes Renovation Passports. In parallel, the EBRD’s updated Environmental & Social Policy (2024) and Energy Sector Strategy (2024–2028) aim to mobilise private capital for replicable renovations via Green Economy Transition targets, risk-sharing instruments, intermediated finance, guarantees, policy support, and the Green Technology Selector. Despite this, adoption of energy-saving technologies is uneven, hindered by capital, information, skills, and organisational barriers, though cost savings, market demand, energy prices, and policy support act as key drivers. A survey of 155 UK and US architects and contractors (balanced by role, country, and firm size) measured 20 barriers and 16 drivers, plus adoption and evaluation stages. Results show capital, material constraints, skills, technology maturity, information, and data security as the main barriers, while cost savings, demand, rising prices, and information access are leading drivers; both correlate positively with adoption, moderated by profession, geography, and firm size, suggesting policy should be finance-led, segment-specific, information-rich, and attentive to digital/cyber risks.