Building activity index

The 100 most active London office buildings

Ranked by tracked occupier movement — works and planning filed on the building, lease-event clusters, and verified occupier counts, all from public registers. When a building lights up here, its occupiers start making decisions.

Updated 20 August 2026 · occupier identities deliberately not published — Signal clients see the names

#BuildingDistrictOccupiersLease eventsLatest building event
1 51 Lime Street, EC3M 7DQ EC3M 21 51 🏗️ Planning: Approved [City of London] — Internal alterations comprising alterations to l
2 40 Leadenhall Street, EC3A 2BJ EC3A 97 94 94 lease events at this building in the last 21 days
3 33 Cavendish Square, W1G 0PW W1G 67 333 333 lease events at this building in the last 21 days
4 41 Devonshire Street, W1G 7AJ W1G 4 147 147 lease events at this building in the last 21 days
5 8 Bishopsgate, EC2N 4BQ EC2N 135 151 151 lease events at this building in the last 21 days
6 55 Baker Street, W1U 7EU W1U 64 127 127 lease events at this building in the last 21 days
7 3 More London Riverside, SE1 2AQ SE1 68 174 174 lease events at this building in the last 21 days
8 40 Bank Street, E14 5NR E14 67 70 70 lease events at this building in the last 21 days
9 98 Theobalds Road, WC1X 8WB WC1X 61 61 61 lease events at this building in the last 21 days
10 70 Gracechurch Street, EC3V 0HR EC3V 63 63 63 lease events at this building in the last 21 days
11 Millbank Tower, SW1P 4QP SW1P 30 46 46 lease events at this building in the last 21 days
12 12 Hammersmith Grove, W6 7AP W6 43 37 37 lease events at this building in the last 21 days
13 55 Ludgate Hill, EC4M 7JW EC4M 74 95 📋 Planning: Approved [City of London] — Installation and display of one internally illumi
14 110 Bishopsgate, EC2N 4AY EC2N 86 74 74 lease events at this building in the last 21 days
15 140 Aldersgate Street, EC1A 4HY EC1A 45 40 40 lease events at this building in the last 21 days
16 22 Bishopsgate, EC2N 4BQ EC2N 77 75 75 lease events at this building in the last 21 days
17 Aldgate Tower, E1 8FA E1 72 66 66 lease events at this building in the last 21 days
18 The Leadenhall Building, EC3V 4AB EC3V 87 144 144 lease events at this building in the last 21 days
19 167-169 Great Portland Street, W1W 5PF W1W 35 2 —
20 12-18 Grosvenor Gardens, SW1W 0DH SW1W 25 52 52 lease events at this building in the last 21 days
21 Thomas House, SW1V 1PX SW1V 45 43 43 lease events at this building in the last 21 days
22 30 Churchill Place, E14 5RE E14 99 186 186 lease events at this building in the last 21 days
23 184 Shepherds Bush Road, W6 7NL W6 27 26 26 lease events at this building in the last 21 days
24 109-111 Fulham Palace Road, W6 8JA W6 22 21 21 lease events at this building in the last 21 days
25 Tower 42 25 Old Broad Street, EC2N 1HN EC2N 100 31 31 lease events at this building in the last 21 days
26 20 Old Bailey, EC4M 7AN EC4M 92 88 88 lease events at this building in the last 21 days
27 60 Cannon Street, EC4N 6NP EC4N 5 58 58 lease events at this building in the last 21 days
28 Chancery House, WC2A 1QS WC2A 42 42 42 lease events at this building in the last 21 days
29 20 Eastbourne Terrace, W2 6LG W2 22 23 23 lease events at this building in the last 21 days
30 Michelin House, SW3 6RD SW3 11 37 37 lease events at this building in the last 21 days
31 23 Savile Row, W1S 2ET W1S 17 16 16 lease events at this building in the last 21 days
32 100 Bishopsgate, EC2N 4AG EC2N 48 130 130 lease events at this building in the last 21 days
33 91 Wimpole Street, W1G 0EF W1G 36 35 35 lease events at this building in the last 21 days
34 33 Queen Street, EC4R 1AP EC4R 21 21 21 lease events at this building in the last 21 days
35 1 Giltspur Street, EC1A 9DD EC1A 6 79 79 lease events at this building in the last 21 days
36 1 Fore Street Avenue, EC2Y 9DT EC2Y 83 111 111 lease events at this building in the last 21 days
37 17 Hanover Square, W1S 1BN W1S 35 1 —
38 Epworth House, EC1Y 1AA EC1Y 38 38 38 lease events at this building in the last 21 days
39 120 New Cavendish Street, W1W 6XX W1W 32 31 31 lease events at this building in the last 21 days
40 80 Strand, WC2R 0RL WC2R 31 31 31 lease events at this building in the last 21 days
41 199 Bishopsgate, EC2M 3TY EC2M 14 14 📋 Planning: Pending [City of London] — Certificate of Lawful Development (existing) for c
42 70 Gracechurch Street, EC3V 0XL EC3V 23 22 22 lease events at this building in the last 21 days
43 83-85 Baker Street, W1U 6AG W1U 27 — —
44 1 Quality Court, Chancery Lane, WC2A 1HR WC2A 80 63 63 lease events at this building in the last 21 days
45 Waverley House, W1F 8GQ W1F 73 69 69 lease events at this building in the last 21 days
46 16 Upper Woburn Place, WC1H 0AF WC1H 56 56 56 lease events at this building in the last 21 days
47 1 Kingdom Street, W2 6BD W2 70 68 68 lease events at this building in the last 21 days
48 Tallis House, EC4Y 0AB EC4Y 30 30 30 lease events at this building in the last 21 days
49 3 Lloyd's Avenue, EC3N 3DS EC3N 37 — —
50 19 Seymour Place, W1H 5BG W1H 19 — —
51 20 Gracechurch Street, EC3V 0BG EC3V 28 28 28 lease events at this building in the last 21 days
52 Blue Fin Building, SE1 0SU SE1 14 14 14 lease events at this building in the last 21 days
53 Southwest House, SW1Y 4LR SW1Y 16 13 13 lease events at this building in the last 21 days
54 123 Buckingham Palace Road, SW1W 9SH SW1W 42 47 47 lease events at this building in the last 21 days
55 133 Houndsditch, EC3A 7BX EC3A 12 11 11 lease events at this building in the last 21 days
56 2 Kingdom Street, W2 6BD W2 32 26 26 lease events at this building in the last 21 days
57 Alpha House, SE1 1LB SE1 21 19 19 lease events at this building in the last 21 days
58 18 King William Street, EC4N 7BP EC4N 22 22 22 lease events at this building in the last 21 days
59 25 Wilton Road, SW1V 1LW SW1V 29 28 28 lease events at this building in the last 21 days
60 The Hkx Building, N1C 4AG N1C 21 19 19 lease events at this building in the last 21 days
61 The Monument Building, 11 Monument Street, EC3R 8AF EC3R 16 10 10 lease events at this building in the last 21 days
62 Golden Cross House, WC2N 4JF WC2N 18 59 59 lease events at this building in the last 21 days
63 55 Loudoun Road, NW8 0DL NW8 101 92 92 lease events at this building in the last 21 days
64 17 Charterhouse Street, EC1N 6RA EC1N 11 — Major works at their building (19 Charterhouse Street): Remodelling, refurbishment and ext
65 Bankside 3, SE1 0SW SE1 33 31 31 lease events at this building in the last 21 days
66 16 Great Queen Street, WC2B 5AH WC2B 91 3 3 lease events at this building in the last 21 days
67 2 Stephen Street, W1T 1AN W1T 21 21 21 lease events at this building in the last 21 days
68 Verde SW1, 10 Bressenden Place, SW1E 5DH SW1E 28 21 21 lease events at this building in the last 21 days
69 Dashwood House, EC2M 1QS EC2M 41 37 37 lease events at this building in the last 21 days
70 3 Waterhouse Square, EC1N 2SW EC1N 35 — —
71 77 East Road, N1 6AH N1 3 29 Planning floorspace at 49-51 East Road: 3,816 sqm (41,075 sq ft) proposed office GIA (EG1)
72 14 Austin Friars, EC2N 2HE EC2N 18 18 18 lease events at this building in the last 21 days
73 39-41 Parker Street, WC2B 5PQ WC2B 12 14 14 lease events at this building in the last 21 days
74 63 St. Mary Axe, EC3A 8AA EC3A 4 37 37 lease events at this building in the last 21 days
75 24 Monument Street, EC2V 5DE EC2V 5 3 3 lease events at this building in the last 21 days
76 99 CHARTERHOUSE STREET, EC1M 6HR EC1M 9 7 7 lease events at this building in the last 21 days
77 245 Hammersmith Road, W6 8PW W6 20 17 17 lease events at this building in the last 21 days
78 70 White Lion Street, N1 9PP N1 16 16 16 lease events at this building in the last 21 days
79 20 Fenchurch Street, EC3M 3BY EC3M 53 65 65 lease events at this building in the last 21 days
80 Berkeley Square House, W1J 6BD W1J 25 25 25 lease events at this building in the last 21 days
81 County Hall, SE1 7PB SE1 38 37 37 lease events at this building in the last 21 days
82 110 Cannon Street, EC4N 6EU EC4N 38 40 40 lease events at this building in the last 21 days
83 Ludgate House 107-111 Fleet Street, EC4A 2AB EC4A 15 15 15 lease events at this building in the last 21 days
84 40 Berkeley Square, W1J 5AL W1J 7 7 📋 Planning: Pending [Westminster] — Partial demolition, infilling, extension and alterati
85 25 Argyll Street, W1F 7TU W1F 6 6 6 lease events at this building in the last 21 days
86 125 Old Broad Street, EC2N 1AR EC2N 13 30 30 lease events at this building in the last 21 days
87 99 Gresham Street, EC2V 7NG EC2V 17 18 18 lease events at this building in the last 21 days
88 2 Fitzroy Place, W1T 3JJ W1T 8 9 9 lease events at this building in the last 21 days
89 15 Golden Square, W1F 9JG W1F 19 19 19 lease events at this building in the last 21 days
90 7th & 24 King William Street, EC4R 9AT EC4R 15 17 17 lease events at this building in the last 21 days
91 Kings House, W6 7JP W6 20 18 18 lease events at this building in the last 21 days
92 77 New Cavendish Street, W1W 6XB W1W 12 12 12 lease events at this building in the last 21 days
93 45 Gresham Street, EC2V 7BG EC2V 39 2 —
94 Harben House Harben Parade, NW3 6LH NW3 68 63 63 lease events at this building in the last 21 days
95 81 Rivington Street, EC2A 3AY EC2A 21 19 19 lease events at this building in the last 21 days
96 27 Greville Street, EC1N 8SU EC1N 13 12 12 lease events at this building in the last 21 days
97 81-87 High Holborn, WC1V 6DF WC1V 31 1 —
98 31 Kentish Town Road, NW1 8NL NW1 15 17 17 lease events at this building in the last 21 days
99 20 Grosvenor Place, SW1X 7HN SW1X 18 21 21 lease events at this building in the last 21 days
100 93-101 Greenfield Road, E1 1EJ E1 44 44 44 lease events at this building in the last 21 days