Cost guide · Updated 2026-04-01

Whole-home remodel cost in California, 2026 edition.

Whole-home remodels run $215–$395/sqft in LA and $275–$510/sqft in the Bay. Second-story additions add another $60–125/sqft on top of the base re-engineering.

Installed cost bands

$/sqft of finished area for these scopes — LA versus Bay Area, side by side.

Scope	Los Angeles	Bay Area
Whole-home remodel	$215–$395 Existing-condition unknowns absorb most of the contingency.	$275–$510 Title 24 retrofits + permit dwell add 8–12%.
Second-story addition	$280–$445 Existing foundation + first-floor framing must be re-engineered.	$350–$555 Geotech + lateral analysis required across most of the region.

What drives the spread

1.
Existing-condition unknowns
Knob-and-tube wiring, cast-iron drains, asbestos popcorn ceilings, and undersized service drops all surface in the first two weeks. Budget 12–15% contingency, not 5%.
2.
Code-cycle upgrades
Any permitted whole-home job triggers Title 24, current seismic standards, fire-sprinkler thresholds where applicable, and current accessibility provisions for new bathrooms.
3.
Structural re-engineering
Second-story additions require foundation analysis, shear-wall layout, and lateral path verification. The structural package alone runs $8–18K.
4.
Mechanical refit
An older house with a 60K BTU gas furnace and 2-ton AC usually needs the duct system re-laid for a 4-zone heat-pump conversion under the 2025 cycle.
5.
Site facilities + dwell
Permits, plans, dumpster rotations, porta-john, temporary power, neighbor relations — 8–15% of total budget, easy to forget, impossible to skip on a 6-month job.

Soft costs to add on top

The hard-cost bands above exclude these. Forgetting them is the most common reason a budget runs 20% over.

Line item	% of hard cost
Design + engineering (architectural, structural, Title 24) Higher end for hillside, custom, or historic-overlay parcels.	6–12%
Permits + plan check (LADBS / SF DBI / etc.) Add school fees ($4–6/sqft for ADUs > 750 sqft).	2–5%
Utility upgrades (panel, sewer lateral, water meter) Pre-1980 homes routinely hit the top of this range.	3–8%
Survey + soils report Required on hillside and parcels with fault-zone proximity.	0.5–2%
Owner contingency Skip this and the next discovery becomes a change-order argument.	8–15%

Los Angeles — burdened hourly rates

Includes payroll burden + small-tool allocation. Excludes overhead & profit.

Journeyman carpenter: $62–$92/hr
Journeyman electrician: $78–$118/hr
Journeyman plumber: $82–$125/hr
General laborer: $38–$56/hr

Bay Area — burdened hourly rates

Includes payroll burden + small-tool allocation. Excludes overhead & profit.

Journeyman carpenter: $78–$118/hr
Journeyman electrician: $95–$145/hr
Journeyman plumber: $98–$150/hr
General laborer: $48–$72/hr

What this is based on

1.
California Existing Building Code defines when a remodel triggers full new-construction compliance.
California Building Standards Commission · view source
2.
2025 Title 24 cycle effective Jan 1, 2026 raises envelope U-values and HVAC efficiency for major remodels.
California Energy Commission · view source
3.
CSLB advisory: any contract over $500 requires a written agreement with mechanic's-lien disclosure.
California Contractors State License Board · view source
4.
FEMA P-1100 Volume 3 prescribes retrofit details that are commonly required during whole-home remodels.
FEMA · view source

Ready to scope it?

See our Whole-Home Remodeling pillar

Process, materials, code walkthroughs, and case studies for this scope — built from the same job tracking as the numbers above.

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