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This category collects 1,643 professional service firms in Houston, the kind of offices you hire by appointment rather than walk into. Both contact routes are well covered: 1,613 have a phone number and 1,485 have a website, the highest website share of any large Houston category in the directory.

Location tracks the office towers. Downtown ZIP 77002 has 65 firms, 77056 in the Galleria area has 62, and 77036 has 52, so a ZIP filter here is roughly a filter on which business district you want to park in. Any row marked Sponsored is a paid placement, flagged on the listing itself. Firms can claim their own entry and correct the address, phone, or the service line we have on file.