Have you discounted the idea of just buying the freehold and re-apportioning responsibilities in the leases?
As in
Buy freehold Grant roof to upstairs lease Loft extension & new roof Sell Profit
Yeah, will take time to do the first few steps though.
I suspect the alternative option will take time as well, and will afford less control over the process and outcome.
@Howard started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Have you discounted the idea of just buying the freehold and re-apportioning responsibilities in the leases?