That's a red herring because most of the price increase comes from increase in land prices.
nonetheless, materials and the cost of labor are the most significant costs for new buildings. not land, taxes, or zoning regulations. here is one example where this is a fact: www.vermontpublic.org/local-news/2024-05-23/uvm-halts-student-housing-project-construction-costs-workforce-shortage
You can compare this to overall housing prices in the LA area[1], prices in 2024 is 262.7% of 2012 prices. Suppose you have a $100k house in 2012, that will worth $262k in 2024, an appreciation of $162k. Using the land value percentages above, the land value of the houses are $51k and $188k respectively, an appreciation of $137k. That means 85% of the appreciation was in land, not because building materials got more expensive or whatever.