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Quick Answer
A whole house remodel touches every room, plus the systems underneath. In Southern California it runs $150,000 to $600,000 or more. Most projects take six to twelve months from first idea to final walk-through.
What A Whole House Remodel Includes
It is not a bigger kitchen project. It is one coordinated plan across the entire home.
A typical scope covers:
- Kitchen remodel. Usually the anchor. New layout, cabinetry, counters, and appliances.
- Bathroom remodels. Primary and secondary done together, with matching fixtures.
- Structural and layout changes. Removing walls, relocating doorways, improving flow.
- Systems. Electrical panel, wiring, plumbing supply and drain lines, HVAC.
- Flooring and finishes throughout. Consistent trim, paint, and lighting across the house.
The point is coherence. Room-by-room renovation leaves a patchwork. A whole house plan does not.
Why Homeowners Remodel Instead Of Moving
Run the comparison honestly. Moving is not just a new mortgage.
Add agent fees. Add closing costs. Add a higher rate on the new loan. Add moving expenses.
Then add the largest hidden cost. You lose your existing low property tax basis under Prop 13.
Against that, a full remodel often costs less than trading up to a home that already has what you want. And you keep the neighborhood, the schools, and the lot.
Did You Know? Under Proposition 13, the California State Board of Equalization caps annual property tax assessment increases at 2 percent, as long as ownership does not change. Selling your current home resets that clock to full market value on the new one, often adding thousands of dollars a year in property tax alone.
Cost Ranges By Scope
Scope Level | Typical Range | What It Covers |
Cosmetic refresh | $150,000 – $250,000 | Finishes, paint, flooring, fixtures |
Mid-range remodel | $250,000 – $400,000 | Kitchen, bathrooms, finishes, some layout change |
Full structural remodel | $400,000 – $600,000+ | Layout changes, systems upgrades, all rooms |
Your final number depends on square footage, finish level, and how much structure moves.
Check Systems Capacity Early
This is the step people skip.
Modern appliances draw more power. So do upgraded lighting and additional bathrooms. Your electrical panel may not have the capacity.
Plumbing has the same problem. Adding a bathroom can overload old supply lines.
Evaluate both before you choose finishes. A panel upgrade discovered mid-project is a schedule problem, not just a cost problem.
Budget With A Real Contingency
Set aside 10 to 20 percent above the construction estimate.
Older California homes routinely reveal problems once walls open. Outdated wiring. Failing cast iron drains. Termite damage. Framing that was never quite right.
Also budget for permit and plan check fees. And for temporary housing if major systems will be down.
Sequence Everything Together
The biggest advantage of a whole house remodel is single-pass work.
You run new electrical service once, not three times. You open walls once. You reconsider the floor plan as a whole rather than one room at a time.
You also avoid the worst outcome. Reopening a finished wall two years later to reach a pipe.
If you are adding square footage as part of the project, our room addition team works within the same timeline and design plan.
Add Efficiency While Walls Are Open
This is the cheapest moment to upgrade performance.
Insulation, a high-efficiency HVAC system, a heat pump water heater, and better window glazing all install easily when framing is exposed.
Retrofitting them later costs far more. California’s Title 24 building energy efficiency standards apply to most of these upgrades, and often to the remodel as a whole.
For the kitchen and bathroom portions of the scope, see our kitchen remodeling services and bathroom remodeling services.
Permits To Expect
Whole house remodels usually require building, electrical, plumbing, and mechanical permits. Structural changes require separate engineering review.
Confirm current requirements with your local building department before finalizing the design. Requirements vary by city.
What To Look For In A Contractor
Verify the CSLB license first. Then ask how many whole-house projects they have run, not how many kitchens.
Ask whether design and construction sit under one contract. A design-build model prices the design as it is drawn. That catches conflicts before they become change orders.
Frequently Asked Questions
How Long Does A Whole House Remodel Take?
Usually six to twelve months from first idea through final walk-through.
Do I Have To Move Out?
It depends on scope. Remodels that leave part of the home livable may not require it. Full systems work usually does.
How Much Contingency Should I Budget?
Ten to twenty percent above the construction estimate.
Can I Phase The Work?
You can. It usually costs more overall and extends disruption for years.
Is Design-Build Better For A Project This Size?
Generally yes. One team and one contract reduces handoff errors.
How Does Prop 13 Affect The Decision To Remodel Versus Move?
It caps annual assessment increases at 2 percent as long as you keep the home. Moving resets your property to full market value, raising your tax bill.
Do I Need Separate Permits For Each Room In A Whole House Remodel?
Often yes, though many jurisdictions issue one combined building permit covering the full project scope.
Can I Combine A Room Addition With A Whole House Remodel?
Yes. Coordinating both under one design and permit set is more efficient than sequencing them separately.
What Is The Biggest Hidden Cost In An Older Home Remodel?
Outdated electrical and plumbing systems are the most common surprise once walls open.
Should I Upgrade My HVAC During A Whole House Remodel?
Yes, if the current system is aging. It is far cheaper to replace while walls and ceilings are already open.
Start Your Whole House Remodel
ACT Construction has specialized in whole house remodels for over 33 years, serving Southern California under CSLB License #883252. See the whole house remodeling page or call (714) 884-8501.
