It's 5 blocks at a time, over 2 years (north an south, right now they're doing south side from 109st to 114st). I heard rumours that they might speed it up a little bit next year and cover the south side between 114 and 121, especially now that they're finishing the downtown stretch (100 to 97 st), but that's just it: rumours...
After this current section is completed up to 114 st, no new Jasper Ave work is expected until 2023 or 2024 according to the city director overseeing this project when I inquired in June.
From the city:
"During the planning for Imagine Jasper Avenue, the construction of the Imagine Jasper Avenue project was split into three phases to manage budget requirements, construction timelines, and construction on parallel corridors (including the construction of the Valley Line West LRT). The three phases originally contemplated:
Phase I: 109 Street - 114 Street (construction currently underway)
Phase II: 114 Street - 119 Street
Phase III: 119 Street - 124 Street
Initially, we were hoping to construct all three phases sequentially between 2020 and 2023 as outlined in a report presented to the Executive Committee on July 5, 2018. However, when Council approved the 2019-2022 Capital Budget, Council only allocated funding for streetscaping for Phase I (109 Street to 114 Street). As you are aware, the construction of this segment is now underway.
Funding for Phase II and Phase III are expected to be requested as part of the 2023-2026 budget discussions. If Council funds this work, construction on these additional phases could begin as early as 2023 or 2024."