To address continued enrollment growth, the Lake Washington School District Board of Directors is considering a $398 million bond.

“Basically we’ve done everything we can with the facilities we have,” district spokeswoman Kathryn Reith said. “Really, to do the kind of expansion we need, it takes a bond measure.”

The bond, which might be sent to voters on the April ballot, will fund three new schools and repair some of the oldest facilities in operation.

The school board is expected to vote on the measure at a Jan. 25 meeting.

If the bond measure passed, the 2015 tax rate would not increase, Reith said.

The 2016 bond would be followed-up by subsequent measures in 2018, 2022 and 2026. The 2016 bond would fund the most immediate needs, while the others would focus on long-term needs, according to district documents.

Among other things, the 2016 bond would fund two new elementary schools and a new middle school to be placed in Redmond; it would upgrade the Old Redmond Schoolhouse Community Center to include a preschool; and it would replace portables at Explorer Elementary School in Redmond.

In Sammamish, the bond would fund remodeling or replacing and enlarging Margaret Mead Elementary School.

In Kirkland, the bond would fund remodeling or replacing and enlarging Juanita High School and Peter Kirk Elementary School.

After 10 years of flat or decreased enrollment, in 2009, the district’s enrollment spiked, averaging 625 students each year.

“That’s the size of a large elementary school,” Reith said.

In fall 2015, the district moved up in the rankings, named fourth largest in the state, trailing only Tacoma, Spokane and Seattle school districts in size. The Lake Washington School District is expected to continue to grow to more than 30,000 students by 2020-2021.

The school district’s Long-term Facilities Planning Task Force had recommended a plan to build new schools and mend older ones, which the board of directors approved in November.