TheEconomist had an article a few years back on software in construction. It was at the time an obvious void but hard to fill. Found it ! https://www.economist.com/leaders/2017/08/17/the-constructio... It was actually more about the general lack of productivity.

Having had renovated my 1970s flat, I can confirm it's not a productive industry and I doubt residential sector will suddenly get very productive for the reason you gave : small custom tasks