Every week, hundreds of London companies move toward a move, refit or refurbishment — a lease ending, a planning application, a growth spurt. The Index counts them, live, by submarket and sector — so you can see where the demand is before it reaches the market.
Across the 155,131 London companies Signal tracks, 771 are in market for an office move, refit or refurbishment right now — and 40 are moving imminently. A further 382 have a lease expiry or break approaching within the next 18 months — the window in which most office decisions are made. — Signal, August 2026
In-market companies by London postcode area.
The most active sectors moving toward an office change.
Companies with a known lease event ahead — the clearest signal of a move or refit, and the window to reach them first.
Central London office supply is tightening at the top. Vacancy has eased to around 7.5% in early 2026 from a peak near 10.6% a year earlier; take-up through 2025 ran broadly in line with the five-year average, with roughly 70% of it going to Grade A space — the best buildings are the scarcest. With prime space short and new completions forecast to fall sharply in 2026, the firms that reach an occupier before they go to market win the work.
Signal tracks 155,131 London companies and scores each on how likely it is to move, refit or refurbish its office soon — using the public records that precede an office change: HM Land Registry lease data, Companies House filings, local-authority planning applications, and hiring and growth signals. "In market" means a company scoring 60 or above; "hot" means 80 or above. The Index is rebuilt from this live data and refreshed weekly.
Office-move signals from public record (HM Land Registry, Companies House, local-authority planning) plus hiring, growth and news. Website evidence is gathered by our identified SignalBot from public company pages only — robots.txt honoured, no personal data. Figures as of 8 August 2026.
One email a month — the fresh numbers on London office movement, by submarket and sector. Built for anyone who works the office-change market.
No spam. Unsubscribe anytime.
Put the live Index figure on your own site or report — it updates itself each week.
Each month’s figures are preserved at a permanent URL — citable as they stood. Subscribe by RSS to get the new month automatically.
The Index is the shape of the market. Signal hands your team the actual companies — scored, timed, and ready to call, on your patch.
Book a demo