How much does home addition cost in Daly City, CA?

Most Daly City homeowners spend between $61,200 – $190,400 on home addition, with an average around $115,600. Local labor prices 36% above the national average, so Daly City quotes tend to land at the higher end of national ranges.

How many quotes should I get in Daly City?

Get at least three written quotes from licensed, insured California contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Bay Area market.

How much does a home addition cost per square foot?

$150 to $450 per square foot. Garage conversions can be as low as $80; second stories and in-law suites reach $500.

Is an addition cheaper than moving?

Often yes, once you count agent commissions, closing costs, moving and a higher mortgage rate. Compare against local price per square foot before deciding.

How long does a home addition take?

Four to nine months including design and permitting. Construction alone is typically three to five months.

Do I need an architect?

For anything structural or over about 200 square feet, yes. Budget $3,000 to $15,000 for drawings and engineering.

Does an addition pay for itself?

Most additions return 50% to 70% of cost at resale. Master suites and in-law suites in high-demand markets do best.

What is the cheapest way to add space?

Finish existing square footage — a basement, attic or garage — at $80 to $200 per square foot rather than building new.

Home/Cost guides/Home Addition/Daly City, CA

Bay Area · California

Home Addition cost in Daly City, CA

Daly City homeowners typically pay $61,200 – $190,400 for home addition. Local labor and materials price 36% above the national average.

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Daly City average

$115,600

Typical low

$61,200

Typical high

$190,400

Per square foot

$205 – $610

Sample ZIP

94014

What drives Daly City pricing

Local labor

Licensed Daly City contractors carry California workers' comp and prevailing wage pressure, and crews here quote roughly 36% above the national labor average. Demand in the Bay Area market peaks in spring, so booking early usually beats a rush premium.

Permits & code

Daly City follows the California Building Standards Code, so most structural, electrical, plumbing and re-roof work needs a permit from the Daly City building department plus Title 24 energy compliance. Bay Area seismic retrofit standards and strict energy upgrades are common conditions of approval.

Climate & conditions

Daly City sits in a mild marine climate with heavy winter rain, so expect proper drainage, moisture detailing and a dry-season schedule for exterior work.

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Addition size400 square feet

Addition type

Finish level

Plumbing and HVAC

Site conditions

Estimated project cost

$54,000 – $136,000

Most homeowners pay around $95,000

Compare addition type

Cost by material in Daly City

Installed Daly City pricing per square foot.

Option	Installed cost	Pros	Cons
Garage conversion	$110 – $270	Cheapest per square foot — foundation and roof exist	Lose the garage, may hurt resale
Sunroom	$135 – $340	Fast, prefab options available	Often not conditioned living space
Bump-out	$205 – $475	Adds usable space without a full foundation	Limited to a few feet of depth
Single-room addition	$205 – $545	True conditioned square footage	Full foundation, roof and permits
Second story	$270 – $680	No lot footprint used	Structural reinforcement, you move out during construction
In-law suite / ADU	$245 – $610	Rental income, multigenerational use	Zoning approval, full kitchen and bath

Where the money goes in Daly City

A typical $115,600 Daly City project, broken down by line item.

Labor38% · $43,928
Materials32% · $36,992
Mechanical, electrical, plumbing15% · $17,340
Design, permits and engineering9% · $10,404
Site work and foundation6% · $6,936

Common add-ons

Extras that show up on Daly City quotes but rarely in the headline price.

Architect and engineering

$4,100 – $20,400

New bathroom

$20,400 – $54,400

Kitchenette

$10,900 – $34,000

HVAC system expansion

$4,100 – $16,300

Electrical panel upgrade

$2,700 – $6,100

Temporary housing during work

$4,100 – $20,400

Ways to save in Daly City

Build up or bump out rather than adding a new foundation footprint.
Keep plumbing on the existing wet wall — moving water and waste lines is the costliest change.
Convert existing space (garage, attic, basement) at half the per-square-foot cost.
Keep the roofline simple; complex tie-ins add framing labor and leak risk.
Lock the design before demolition — change orders during construction carry the biggest premiums.

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Home Addition cost near Daly City

Home Addition cost in San Jose, CA

$62,100 – $193,200

Home Addition cost in San Francisco, CA

$65,250 – $203,000

Home Addition cost in Oakland, CA

$59,400 – $184,800

Home Addition cost in Fremont, CA

$60,750 – $189,000

Home Addition cost in San Mateo, CA

$63,000 – $196,000

Home Addition cost in Berkeley, CA

$60,300 – $187,600

More California cities

Los Angeles San Diego Sacramento Fresno Long Beach Anaheim Santa Ana Irvine

Other project costs in Daly City

Fence Installation in Daly City

$2,040 – $5,440

Roof Replacement in Daly City

$11,560 – $46,240

Kitchen Remodel in Daly City

$24,480 – $129,200

HVAC Replacement in Daly City

$7,480 – $24,480

Deck Building in Daly City

$5,984 – $16,320

Window Replacement in Daly City

$612 – $2,040

See every Daly City cost guide