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 1 October 2026 · occupier identities deliberately not published — Signal clients see the names

#BuildingDistrictOccupiersLease eventsLatest building event
1 33 Cavendish Square, W1G 0PW W1G 75 347 347 lease events at this building in the last 21 days
2 55 Baker Street, W1U 7EU W1U 64 128 Planning floorspace at 55 Baker Street: 56,711 sqm (610,437 sq ft) proposed office GIA (EG
3 20 Gracechurch Street, EC3V 0BG EC3V 28 29 29 lease events at this building in the last 21 days
4 133 Houndsditch, EC3A 7BX EC3A 12 11 Planning floorspace at 133 Houndsditch: 46,230 sqm (497,620 sq ft) stated office GIA — P20
5 80 Cheapside, EC2V 6EE EC2V 6 44 44 lease events at this building in the last 21 days
6 20 Old Bailey, EC4M 7AN EC4M 91 87 87 lease events at this building in the last 21 days
7 Tower 42 25 Old Broad Street, EC2N 1HN EC2N 107 32 32 lease events at this building in the last 21 days
8 Southwest House, SW1Y 4LR SW1Y 19 14 14 lease events at this building in the last 21 days
9 Bankside 3, SE1 0SW SE1 34 32 32 lease events at this building in the last 21 days
10 25 Gresham Street, EC2V 7HN EC2V 15 17 Planning floorspace at 25 Gresham Street: 15,968 sqm (171,880 sq ft) proposed office GIA (
11 10 Bressenden Place, SW1E 5DH SW1E 31 21 21 lease events at this building in the last 21 days
12 39-41 Parker Street, WC2B 5PQ WC2B 12 14 14 lease events at this building in the last 21 days
13 55 Loudoun Road, NW8 0DL NW8 101 91 91 lease events at this building in the last 21 days
14 125 Old Broad Street, EC2N 1AR EC2N 13 30 30 lease events at this building in the last 21 days
15 33 Holborn, EC1N 2HT EC1N 8 27 27 lease events at this building in the last 21 days
16 Dashwood House, EC2M 1QS EC2M 41 37 37 lease events at this building in the last 21 days
17 20 Fenchurch Street, EC3M 3BY EC3M 55 70 70 lease events at this building in the last 21 days
18 South Building, EC1A 4HD EC1A 33 27 27 lease events at this building in the last 21 days
19 99 CHARTERHOUSE STREET, EC1M 6HR EC1M 9 7 7 lease events at this building in the last 21 days
20 99 Gresham Street, EC2V 7NG EC2V 17 18 18 lease events at this building in the last 21 days
21 110 Cannon Street, EC4N 6EU EC4N 21 42 42 lease events at this building in the last 21 days
22 45 Gresham Street, EC2V 7BG EC2V 38 3 3 lease events at this building in the last 21 days
23 The Monument Building, 11 Monument Street, EC3R 8AF EC3R 16 10 10 lease events at this building in the last 21 days
24 15 Golden Square, W1F 9JG W1F 20 20 Planning floorspace at 15 Golden Square: 599.8 sqm (6,456 sq ft) proposed office GIA (EG1)
25 20 Grosvenor Place, SW1X 7HN SW1X 18 21 21 lease events at this building in the last 21 days
26 40 Leadenhall Street, EC3A 2BJ EC3A 97 94 Planning floorspace at 36, 38 Leadenhall Street: 2,037.3 sqm (21,929 sq ft) proposed offic
27 24 Monument Street, EC2V 5DE EC2V 6 4 4 lease events at this building in the last 21 days
28 14 Austin Friars, EC2N 2HE EC2N 18 17 17 lease events at this building in the last 21 days
29 12 Hammersmith Grove, W6 7AP W6 43 38 38 lease events at this building in the last 21 days
30 87-88 Turnmill Street, EC1M 5QU EC1M 13 16 16 lease events at this building in the last 21 days
31 20 North Audley Street, W1K 6WE W1K 18 18 18 lease events at this building in the last 21 days
32 Unilever House, EC4Y 0DY EC4Y 11 10 10 lease events at this building in the last 21 days
33 75 King William Street, EC4N 7BE EC4N 34 34 34 lease events at this building in the last 21 days
34 7th & 24 King William Street, EC4R 9AT EC4R 16 17 17 lease events at this building in the last 21 days
35 62 Camden Road, NW1 9DR NW1 20 24 24 lease events at this building in the last 21 days
36 50 Bedford Square, WC1B 3DP WC1B 15 15 15 lease events at this building in the last 21 days
37 6 St James's Square, SW1Y 4JU SW1Y 16 13 13 lease events at this building in the last 21 days
38 21 Arlington Street, SW1A 1RN SW1A 12 11 11 lease events at this building in the last 21 days
39 2 Seething Lane, EC3N 4AT EC3N 7 5 5 lease events at this building in the last 21 days
40 36 Golden Square, W1F 9EE W1F 23 1 —
41 135 Bishopsgate, EC2M 3TP EC2M 34 31 31 lease events at this building in the last 21 days
42 1 More London Place, SE1 2AF SE1 27 28 28 lease events at this building in the last 21 days
43 1 Southampton Row, WC1B 5HA WC1B 3 2 —
44 100 Victoria Street, SW1E 5JL SW1E 18 18 18 lease events at this building in the last 21 days
45 1 Angel Court, EC2R 7HJ EC2R 8 10 10 lease events at this building in the last 21 days
46 8 Bloomsbury Street, WC1B 3SR WC1B 26 28 28 lease events at this building in the last 21 days
47 31 Kentish Town Road, NW1 8NL NW1 16 18 18 lease events at this building in the last 21 days
48 82 St. John Street, EC1M 4JN EC1M 10 3 3 lease events at this building in the last 21 days
49 16 Berkeley Street, W1J 8DZ W1J 34 36 36 lease events at this building in the last 21 days
50 47 Queen Anne Street, W1G 9JG W1G 4 9 9 lease events at this building in the last 21 days
51 40 Gracechurch Street, EC3V 0BT EC3V 5 8 8 lease events at this building in the last 21 days
52 123 Victoria Street, SW1E 6DE SW1E 17 22 22 lease events at this building in the last 21 days
53 Harben House Harben Parade, NW3 6LH NW3 72 67 67 lease events at this building in the last 21 days
54 66 Lincoln's Inn Fields, WC2A 3LH WC2A 6 16 16 lease events at this building in the last 21 days
55 Britannia House, W6 0LH W6 100 4 4 lease events at this building in the last 21 days
56 1 Bell Street, NW1 5BY NW1 21 21 21 lease events at this building in the last 21 days
57 12 Gough Square, EC4A 3DW EC4A 21 21 Planning floorspace at 12 Gough Square: 686.5 sqm (7,389 sq ft) proposed office GIA (EG1)
58 64 North Row, W1K 7DA W1K 9 7 7 lease events at this building in the last 21 days
59 1 Cornhill, EC3V 3ND EC3V 21 26 26 lease events at this building in the last 21 days
60 11 Beavor Lane, W6 9AR W6 7 6 6 lease events at this building in the last 21 days
61 16 Great Queen Street, WC2B 5AH WC2B 90 4 4 lease events at this building in the last 21 days
62 41 Lothbury, EC2R 7HF EC2R 14 — —
63 Peter Benenson House, 1 Easton Street, WC1X 0DW WC1X 5 5 5 lease events at this building in the last 21 days
64 82 Wandsworth Bridge Road, SW6 2TF SW6 8 8 8 lease events at this building in the last 21 days
65 49 Grosvenor Street, W1K 3HP W1K 10 13 🏗️ Planning: Pending [Westminster] — Internal fit out works (26/06345/LBC)
66 30 Park Street, SE1 9EQ SE1 9 6 6 lease events at this building in the last 21 days
67 91 Brick Lane, E1 6QL E1 6 5 5 lease events at this building in the last 21 days
68 16 Palace Street, SW1E 5JD SW1E 10 11 11 lease events at this building in the last 21 days
69 5 New Street Square, EC4A 3TW EC4A 100 123 123 lease events at this building in the last 21 days
70 10 Norton Folgate, E1 6DB E1 19 14 14 lease events at this building in the last 21 days
71 30 Gresham Street, EC2V 7QN EC2V 7 9 9 lease events at this building in the last 21 days
72 10 London Mews, W2 1HY W2 26 27 27 lease events at this building in the last 21 days
73 49 Princes Gate, SW7 2PG SW7 5 5 5 lease events at this building in the last 21 days
74 80 Charlotte Street, W1T 4DF W1T 6 4 4 lease events at this building in the last 21 days
75 110 Bishopsgate, EC2N 4AY EC2N 86 73 73 lease events at this building in the last 21 days
76 10-12 RUSSELL SQUARE, LONDON, WC1B 5EH, WC1B 5EH WC1B 11 11 11 lease events at this building in the last 21 days
77 100 Liverpool Street, EC2M 2AT EC2M 20 17 17 lease events at this building in the last 21 days
78 42 Berkeley Square, W1J 5AW W1J 16 — Major works at their building (42 Berkeley Square): Alterations at roof level including de
79 107 Cheapside, EC2V 6DN EC2V 12 9 9 lease events at this building in the last 21 days
80 York House, WC2B 6UJ WC2B 15 12 12 lease events at this building in the last 21 days
81 17 Charterhouse Street, EC1N 6RA EC1N 11 — Major works at their building (19 Charterhouse Street): Remodelling, refurbishment and ext
82 55 New Oxford Street, WC1A 1BS WC1A 21 20 20 lease events at this building in the last 21 days
83 FRONT, LYNTON HOUSE, 7-12 TAVISTOCK SQUARE, LONDON, WC1H 9LT, WC1H 9LT WC1H 6 5 5 lease events at this building in the last 21 days
84 1 Tower Place West, EC3R 5BU EC3R 25 — 📋 Planning: Approved [City of London] — Installation and display of: (i) two internally i
85 Regina House, NW3 5JS NW3 28 25 25 lease events at this building in the last 21 days
86 Berkshire House, WC1V 7AA WC1V 42 40 40 lease events at this building in the last 21 days
87 Capital House, NW1 5DH NW1 27 27 27 lease events at this building in the last 21 days
88 167 Fleet Street, EC4A 2EA EC4A 18 43 43 lease events at this building in the last 21 days
89 9 Hatton Street, NW8 8PL NW8 9 7 7 lease events at this building in the last 21 days
90 12 Arthur Street, EC4R 9AB EC4R 9 5 5 lease events at this building in the last 21 days
91 36 Broadway, SW1H 0BH SW1H 8 4 4 lease events at this building in the last 21 days
92 No.1 London Bridge, SE1 9BG SE1 9 4 4 lease events at this building in the last 21 days
93 1 Embankment Place, WC2N 6RH WC2N 11 12 12 lease events at this building in the last 21 days
94 16 Great Queen Street, WC2B 5DG WC2B 11 13 13 lease events at this building in the last 21 days
95 190 Great Dover Street, SE1 4YB SE1 3 1 —
96 29-30 ELY PLACE, LONDON, EC1N 6TD, EC1N 6TD EC1N 4 4 4 lease events at this building in the last 21 days
97 40 Lime Street, EC3M 7AW EC3M 13 11 11 lease events at this building in the last 21 days
98 The Hkx Building, N1C 4AG N1C 21 20 20 lease events at this building in the last 21 days
99 15 Stukeley Street 15 Stukeley Street, WC2B 5LT WC2B 4 6 6 lease events at this building in the last 21 days
100 Alpha House, SE1 1LB SE1 22 19 19 lease events at this building in the last 21 days