[mutatio]

Occupancy rate for commercial property is mostly over 90% in London, and I believe the residential market is even more efficient. How would LTV help if occupancy is so high? Don't forget occupancy rate also highlights slack in the market allowing for the dynamism you need, if you punish that I suspect the unintended consequences would be less desirable than any tax proceeds, after all, all forms of rent control invariably disadvantage the renter the most - and I don't see this being any different - the market would absorb the risk and rental prices would likely increase.