Critical Path
27 Beechwood Drive is your bottleneck. SAP 38, F-rated, would need £14,500 of work to reach C. Consider selling vs retrofitting.
Quick Win Cluster
Four D-rated properties sit at SAP 65-68. Each needs only loft top-up + LEDs (£850 total) to clear the line.
Timing
If you start the 2 high-risk properties this summer, you finish 14 months before deadline with no rental void overlap.