State recently released stats for housing construction in LA City and County, through FY2024 (marked 2025 on the graph)
Surprisingly, Measure ULA didn't dent housing construction horribly much even though its been active since the start of 2023. Additionally, its curious to note that LA City and County overall have been building far more housing units in the past 3 years than any time since the early 1990s. The County is building on average >30,000 housing units each year for the past 3 years between 2022-24, as has built between 150K-160K units so far this decade.
If this pace continues through the end of the decade, assuming no acceleration, the county will have built a cumulative ~340K-350K new units between 2020-2030. For perspective, there was 3.6 million units of housing in LA county at the start of the decade, so this pace represents a decently healthy growth of ~10%, which is likely enough to keep rents stable through the rest of the decade. Of course, this projection doesn't account for the ~12K destroyed homes from the fires, and the original RHNA goals for the county were closer to 800K new units of housing, but housing construction pace might also increase with more and more state housing laws + future loosening of interest rates.