What It Costs to Renovate a House in the Bay Area

If you own an older house in Alameda County and you’re deciding whether to renovate before you sell, the first question is what the work will cost. This guide pulls together ranges from established cost guides, explains what pushes renovation budgets up in older East Bay houses and shows how to compare renovating with selling as-is.

Typical costs by project

Project	Typical range
Kitchen remodel	$14,590–$41,620
Bathroom remodel	$6,651–$17,657
Whole-house rewiring, about 2,200 sq. ft.	$7,286–$13,257

HomeAdvisor’s kitchen guide, updated in June 2026, puts the average kitchen remodel at $26,990, or $75 to $250 per square foot depending on size, materials and whether the layout changes. Its bathroom guide puts most bathroom remodels between $6,651 and $17,657, with the finishes you choose making a big difference. The rewiring range is Fixr’s, for a house of about 2,200 square feet, and our guide to what it costs to rewire a house goes into more detail.

All three are national figures. HomeAdvisor’s bathroom guide gives the example of a $20,000 bathroom project in Alabama that might cost around $30,000 in California, with the same materials and the same amount of time. Treat national numbers as a starting point, and get local bids before you commit.

A whole-house renovation is a combination of jobs like these, plus whatever turns up once walls and floors are open.

What drives the cost

Labor

Labor is a large share of any renovation. HomeAdvisor suggests planning for labor at about 25% of a kitchen remodel and 40% to 65% of a bathroom remodel, and says most contracting pros charge $50 to $75 an hour. It also notes that higher labor rates in big metro areas can push quotes up.

Permits

Moving pipes or walls nearly always triggers a permit, according to HomeAdvisor, which puts typical construction permit fees between $100 and $1,000. Demolition is its own line item too: HomeAdvisor says tearing out old tile, fixtures and drywall adds $1,000 to $2,300 to a bathroom remodel.

In the East Bay, a big remodel can bring in the sewer lateral. In the cities covered by EBMUD’s private sewer lateral program, building or remodeling work worth more than $100,000 triggers a requirement for a compliance certificate showing the pipe from the house to the street doesn’t leak, checked at final permit sign-off. If the lateral fails, its repair or replacement joins the budget. Our page on selling a house that needs repairs lists the cities in EBMUD’s program and notes that Berkeley runs its own.

The age of the house

Older houses carry costs that newer ones don’t:

Lead paint rules. For homes built before 1978, firms doing renovation, repair or painting work that disturbs lead-based paint must be EPA- or state-certified and use certified renovators who follow specific work practices to prevent lead contamination. It’s worth asking each contractor whether their bid accounts for that.
Old wiring. Fixr notes that rewiring an older house usually costs more than wiring new construction, because the job means opening walls, getting into crawl spaces, pulling out old wiring and patching everything afterward.
Hidden conditions. Once walls, floors and ceilings are open, an older house can reveal rot, leaks or old repairs that no estimate included. A contingency in the budget is the usual answer.

Time

Time costs money while you own the house. HomeAdvisor says a kitchen remodel can put the kitchen out of use for several weeks, and Fixr says rewiring a whole house typically takes about a week and can stretch to three weeks or more. A full renovation stacks jobs like these, and every month the work runs adds another round of mortgage, tax, insurance and utility bills, sometimes on a house nobody can live in.

Contractor rules that protect your budget

California limits what a contractor can ask for up front. According to the Contractors State License Board, a contractor can’t ask for a down payment of more than 10% of the contract price on a home improvement project or $1,000, whichever is less, unless the contractor has a blanket performance and payment bond on file with the board.

The board also recommends getting at least three written bids based on identical plans, specifications and scope of work, and being wary of any bid that is far lower than the others. You can check a contractor’s license on the board’s website before signing.

Renovate first or sell as-is?

Renovating before a sale can pay off, especially when the work is mostly cosmetic and you have the time and cash. Major work is a bigger bet. To compare honestly, add up:

What an agent expects the house to sell for after the work.
Minus the renovation cost, with a contingency for surprises.
Minus the mortgage, taxes, insurance and utilities you’ll pay while the work is underway.
Minus the costs of selling, such as commissions and closing costs.

Then compare that figure with what you could get for the house as it is today, with no work and no waiting.

That as-is number is where we come in. We buy houses as-is across Alameda County, usually make a written cash offer within 24 hours, charge no fees or commissions and cover typical closing costs. You don’t repair or clean anything, and we can close in as little as 3 days once title is clear, or later on your schedule. A cash offer is usually below full market value, so it’s most useful as a firm number to set against the after-renovation estimate. How it works explains the steps.

Sources

General information about California rules as of October 3, 2026, not legal, tax or financial advice. Laws change and every situation is different, so check the details with an attorney, CPA or other professional.