Detective Agencies in Harrow, Middlesex
| Name & Address | Phone # | Website |
| Black Tracing & Investigation Services 59 Trevelyan Cresent, Harrow, Middlesex HA3 0RG | 020 89091911 |  |
| London House Services 3 Beaumont Avenue, Harrow, Middlesex HA2 7AT | 020 85372349 | |
| Moore Booth & Co Ltd 120a Pinner Road, Harrow, Middlesex HA1 4JD | 020 84242226 | |
| Pinkerton Consulting & Investigations 102 College Road, Harrow, Middlesex HA1 1ES | 020 84248884 |  |
| Snoopers 237 Imperial Drive, Harrow, Middlesex HA2 7HE | 020 88660866 | |
