1. Remove all government sponsorship of mortgages, gradually spool off all existing GSE mortgages into private markets. Possible exception: owner-occupied homes, limit one per
2. Remove all implicit government backing of insurers and re-insurers of anything having to do with mortgages.
3. Remove mortgage interest deduction.
4. Valuations reported to IRS, property insurers, permitting offices and bank loans link back to publicly-available property tax records.
5. Property developers, not taxpayers, pay for initial costs to extend infrastructure, foot the bill for floating the bonds to maintain the extensions, and residents moving in must pay into the bond fund over time, gradually paying off the initial buyers of the bond; bonds are reissued as old bonds mature.
6. Bill back costs of developing (up to inner core density, with adjustments to purchase fast public transport into inner core) further out from urban core back to inner core residents as increased property taxes spread over 7 years, if inner core residents vote down densification, and rebate some of the collected funds to developers of outer core.
7. Standardize all government building codes to a single set, specifying function/intent/goal and not form, thereby allowing offshore for example factory-built modules to access a contiguous national market, or alternative construction techniques without lengthy permitting.
These and other measures that open up competition for real estate development would be wildly politically unpopular in most areas and constituencies of the US. The US real estate market is superficially capitalist for a number of very interconnected reasons, and I've observed similar dynamics in other nations I've enquired about property within. Property is an extremely special-case asset, with privileged market protections/distortions few other asset categories enjoy.