Groton — The special referendum for people to vote on whether or not to approve an ordinance revising the Groton 2020 school plan that would enable the town to build two new elementary schools, rather than renovate existing buildings, will be held Tuesday.

In a referendum two years ago, Groton voters approved bonding $184.5 million to build one new consolidated middle school and renovate the existing Cutler Middle School and West Side Middle School into “like new” elementary schools.

But building two new elementary schools actually proved to be a more cost-efficient option than renovating the existing middle school buildings into elementary schools, Superintendent Michael Graner has said, and the state gave approval for the town to build new elementary schools.

In order for the town to do so, voters will need to approve the ordinance modifying the Groton 2020 school plan.

According to the town notice, the question will appear on the ballot as: “Shall the ordinance modifying the Groton 2020 plan to provide for the new construction of two Pre-K through grade 5 elementary schools rather than the renovation of schools, and amending ordinance No. 284 approved at referendum November 8, 2016 appropriating $184,500,000 for the design and construction of the Groton 2020 plan and authorizing the issue of bonds to finance said appropriation be approved?”

There are no changes proposed to the plan to build a consolidated middle school. If voters do not approve the revised ordinance, the version approved in 2016 still will be effective, according to the notice.

Voting will take place from 6 a.m. to 8 p.m. Tuesday at the following polling places:

District 1: Groton Public Library, 52 Newtown Road, Groton

District 2: West Side Middle School, 250 Brandegee Ave., Groton

District 3: Groton City Municipal Building, 295 Meridian St., Groton

District 4: Mary Morrisson Elementary School, 154 Tollgate Road, Groton

District 5: School Administration Building, 1300 Flanders Road, Mystic

District 6: S.B. Butler School, 155 Ocean View Ave., Mystic

District 7: Fitch High School, 101 Groton Long Point Road, Groton