can a landlord enter property without notice

[ODonovan]

No, a landlord generally cannot enter a rental property without notice, except in genuine emergencies like fires or gas leaks, but specific rules on notice periods and acceptable reasons vary significantly by jurisdiction (state/country), with landlords typically required to give 24 hours' notice for non-emergency visits related to repairs, inspections, or prospective tenants, in respect of the tenant's right to privacy.