How much does home addition cost in Beaverton, OR?

Most Beaverton homeowners spend between $51,700 – $161,000 on home addition, with an average around $97,700. Local labor prices 15% above the national average, so Beaverton quotes tend to land at the higher end of national ranges.

Why is home addition more or less expensive in Beaverton than elsewhere?

Westside Portland suburb with steady contractor demand. Rain-driven moisture detailing raises material costs.

Do I need a permit for home addition in Beaverton, Oregon?

City permits required for structural and exterior work. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Beaverton?

Get at least three written quotes from licensed, insured Oregon contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Portland 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/Beaverton, OR

Portland · Oregon

Home Addition cost in Beaverton, OR

Beaverton homeowners typically pay $51,700 – $161,000 for home addition. Local labor and materials price 15% above the national average.

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Beaverton average

$97,700

Typical low

$51,700

Typical high

$161,000

Per square foot

$175 – $520

Sample ZIP

97005

What drives Beaverton pricing

Local labor

Westside Portland suburb with steady contractor demand.

Permits & code

City permits required for structural and exterior work.

Climate & conditions

Rain-driven moisture detailing raises material costs.

Instant cost calculator

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Addition size400 square feet

Addition type

Finish level

Plumbing and HVAC

Site conditions

Estimated project cost

$46,000 – $116,000

Most homeowners pay around $81,000

Compare addition type

Cost by material in Beaverton

Installed Beaverton pricing per square foot.

Option	Installed cost	Pros	Cons
Garage conversion	$92 – $230	Cheapest per square foot — foundation and roof exist	Lose the garage, may hurt resale
Sunroom	$115 – $290	Fast, prefab options available	Often not conditioned living space
Bump-out	$175 – $400	Adds usable space without a full foundation	Limited to a few feet of depth
Single-room addition	$175 – $460	True conditioned square footage	Full foundation, roof and permits
Second story	$230 – $575	No lot footprint used	Structural reinforcement, you move out during construction
In-law suite / ADU	$205 – $520	Rental income, multigenerational use	Zoning approval, full kitchen and bath

Where the money goes in Beaverton

A typical $97,700 Beaverton project, broken down by line item.

Labor38% · $37,126
Materials32% · $31,264
Mechanical, electrical, plumbing15% · $14,655
Design, permits and engineering9% · $8,793
Site work and foundation6% · $5,862

Common add-ons

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

Architect and engineering

$3,450 – $17,300

New bathroom

$17,300 – $46,000

Kitchenette

$9,200 – $28,700

HVAC system expansion

$3,450 – $13,800

Electrical panel upgrade

$2,300 – $5,200

Temporary housing during work

$3,450 – $17,300

Ways to save in Beaverton

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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More Beaverton research

Best home addition companies in Beaverton Home Addition permits in Oregon Home Addition near me All Oregon prices

Home Addition cost near Beaverton

Home Addition cost in Vancouver, WA

$50,351 – $156,800

Home Addition cost in Portland, OR

$53,049 – $165,200

Home Addition cost in Hillsboro, OR

$51,250 – $159,600

Home Addition cost in Gresham, OR

$49,452 – $154,000

More Oregon cities

Salem Eugene Bend Medford Corvallis Springfield

Other project costs in Beaverton

Fence Installation in Beaverton

$1,725 – $4,600

Roof Replacement in Beaverton

$9,775 – $39,100

Kitchen Remodel in Beaverton

$20,700 – $109,250

HVAC Replacement in Beaverton

$6,325 – $20,700

Deck Building in Beaverton

$5,060 – $13,800

Window Replacement in Beaverton

$518 – $1,725

See every Beaverton cost guide