Logic Masters Deutschland e.V.

I've been having a lot of fun with Chaos Construcion lately (solving and setting), and a lot of fun with Deconstruction (solving); and I've been wanting to make this idea for a few weeks. N-Sumscrapers is also the constraint for the latest Dutch Flat Mates (7 Oct 26), albeit without Deconstruction. It has been a lot of fun to work with.

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Puzzle Link: Click Here

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Initial Setter Difficulty: 4-4.5 / 5

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Deconstruction:
Fill the grid with nine non-overlapping 3x3 square regions, such that each region contains the digits 1-9 once each and no digit repeats in any row or column. Cells outside regions do not contain digits.

N-Sumscrapers
Each digit in the grid represents a building of that height; taller ones hide shorter ones. Clues outside the grid indicate the sum of the first N cells in the corresponding row or column, where N is the number of visible buildings.

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Hint to start

The 5 clue in C1 is the most restricted, and the top left 3x3 can be placed with consideration of other clues on the left.

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Solvable Example: