Here's his $138K campaign donor list (
link) go to the embedded box... I can't be bothered to add up the Developers / Contractors on the list (and how much do you want to bet they had a hand in the $53K of "fundraising events") but I want to guess it's about 95% home building.
Do other candidates have developers as donors? - yes - here's the Sun's favorite Councillor
Druh.
However, her list is at least diversified outside of the Developers - where as the pure concentration of them for Chu would seem to suggest his lips are firmly planted on the Developer's derriere.