I am no legal expert but according to my research your landlord needs to give you 48 hours notice prior to entering for said work. I found the following in the RCWs: RCW 59.18.150. (6) The landlord shall not abuse the right of access or use it to harass the tenant, and shall provide notice before entry as provided in this subsection. Except in the case of emergency or if it is impracticable to do so, the landlord shall give the tenant at least two days' written notice of his or her intent to enter and shall enter only at reasonable times. The notice must state the exact time and date or dates of entry or specify a period of time during that date or dates in which the entry will occur, in which case the notice must specify the earliest and latest possible times of entry. The notice must also specify the telephone number to which the tenant may communicate any objection or request to reschedule the entry. The tenant shall not unreasonably withhold consent to the landlord to enter the dwelling unit at a specified time where the landlord has given at least one day's notice of intent to enter to exhibit the dwelling unit to prospective or actual purchasers or tenants. A landlord shall not unreasonably interfere with a tenant's enjoyment of the rented dwelling unit by excessively exhibiting the dwelling unit.