New single-family construction in Los Angeles runs about $300 to $600 per square foot in 2026 for builder-grade through mid-range custom, and $800 to $1,500 or more per square foot for genuinely custom and luxury homes. Those figures exclude land, design fees and permits, which typically add another 15 to 25 percent.
What per-square-foot numbers leave out
Land. Demolition. Architecture and engineering. Permit and impact fees. Utility connection fees. Financing. Landscaping. Almost every per-foot figure you will read online is hard construction cost only, which is why budgets built on them come up short. Soft costs commonly add 15 to 25 percent on top.
Why Los Angeles is expensive
Labor rates. Seismic and fire requirements. Solar and energy mandates. Long permit timelines that carry financing costs. And hillside lots, which can add $75,000 to $300,000 in foundation and geotechnical work before you have built anything you can see.
A flat lot in a standard zone with a simple, efficient design is how you get to the low end of the range. Everything else moves you up it.
Small multifamily
A duplex to fourplex typically runs $300 to $450 per square foot of building. Per unit it is usually cheaper than a single house of the same total area, because you are repeating a layout and sharing walls, foundations and roofs.
Los Angeles County figures, reviewed 2026-10-29 by America General Contractors, California contractor licence CSLB 1083262. Planning ranges, not a quote, and not legal advice. We confirm the current rules for your parcel before anything gets drawn.
