Where the names actually come from
A useful starting list mixes sources rather than relying on one. Search results show who has invested in being found, which is information but not evidence of service. A recommendation from a business like yours is more useful because the person has watched the work over time. A building manager or a neighbouring tenant often knows who already attends the street and whether they turn up. Gather from all three and you avoid the bias of any single channel.
Resist the urge to shortcut by taking the first three results you see. Position on a results page reflects marketing effort and, in some cases, paid placement. It says nothing about whether the provider has ever cleaned a professional suite, whether they employ or subcontract, or whether they will still answer the phone in nine months. Treat a listing as a lead to be checked, not as a shortlist somebody has already assembled for you.
