The duration of the examination of the documents depends on the type of residence permit requested and the duration of the examination: http://www.pmlp.gov.lv/lv/sakums/pakalpojumi/iecelosana-en/request-free/national-nodeva.html
Foreign national - a person who is not a citizen of Latvia, a non-citizen of Latvia
To issue and register a residence permit, which gives the right of a third-country national to reside in the Republic of Latvia for a specified time (temporary residence permit) or permanently (permanent residence permit).
Service requests
The corresponding questionnaire and the established documents for requesting a residence permit must be submitted
Receipt of services
The service is received in accordance with the application of choice.
Submission of a questionnaire for requesting a residence permit
can submit a questionnaire for requesting a residence permit electronically before submitting documents