Ask HN: What are some things we could build to make housing more affordable?

Smaller homes. Seems like you can buy a tiny home, or a mcmansion and nothing in between. 600-800 sq ft home on a regular foundation would be a good start.

A platform that allows a person's employer to assist them with obtaining a mortgage. For example streamlining the application process, loaning deposits, repayments directly from salary and subsidising repayments.

Its a good employee retention tool for an established company and presumably having the company in the mix reduces risk of non-repayment and can lead to better deals on the interest.

Profitable industries in rust belt cities where housing is cheap but unemployment is too high.