Design-Build Contractor · Beaverton, OR
The Design-Build Contractor Beaverton Trusts
One team managing design, permitting, and construction from start to finish. No gaps, no handoffs, no surprises. De Marco Builders has been delivering design-build projects across Beaverton and the west side since 1996.
How Design-Build Works
Fewer Moving Parts. Better Results.
Most construction projects fail at the handoff — the moment the architect passes the plans to the contractor and walks away. That's where budgets get rewritten, timelines stretch, and homeowners get caught in the middle of someone else's disagreement.
Design-build eliminates that handoff entirely.
At De Marco Builders, the same team that designs your project builds it. Your team is working together toward the same outcome under the same contract — which means problems get caught on paper, not mid-construction, and the plans that go for permitting reflect what actually gets built.
Built for Beaverton
Designed for the West Side.
Beaverton's residential landscape covers a wide range — from established mid-century neighborhoods like Cedar Hills to newer developments in Bethany and South Cooper Mountain. Each brings its own design context, site conditions, and homeowner expectations.
We've been working across Beaverton and Washington County long enough to know what designs move efficiently through the permitting process, what additions complement an existing home, and what site conditions require additional attention before construction begins. That familiarity doesn't show up on a blueprint, but it but it makes a real difference when it matters most.
THE PROCESS
What to Expect.
We don't start with a contract. We start with a conversation about what you're trying to build, what you have to work with, and what a successful project looks like for you. Once we have a clear picture, our design team develops plans with real-world cost and constructability in mind from day one — so there are no expensive revisions once permits are approved and there's no gap between what was designed and what gets built.
From there, the same team that drew the plans pulls the permits and carries the project through to completion. Your project manager keeps you updated at every phase, so you always know where your project stands. Our critical path scheduling keeps construction moving efficiently, and our guaranteed contract price means the number you agreed to at the start is the number you pay at the end.
WHY DEMARCO
Why Beaverton Clients Choose Us.
Beaverton's longest-serving custom builder
In business since 1996, we know Beaverton's neighborhoods, soils, permits, and inspectors better than anyone.
Fixed price, fixed schedule
What we quote is what you pay. The date we give you is the date we hit. No surprise change orders, no budget creep, no exceptions — not once in 30 years of Portland construction.
One team from start to finish
Design, permits, construction — same crew, same point of contact, from the first site walk to the day we hand you the keys. No gaps in accountability, no finger-pointing when something needs to be fixed.
Award-winning craftsmanship
Recognized by Portland Monthly and the NW Natural Street of Dreams.
Family-owned since day one
Same owners, same values, nearly three decades running. You work with the people whose name is on the door.
Serving all of Portland Metro
From Beaverton and Cedar Hills, to Lake Oswego, Tigard, and every Portland neighborhood in between.
Our Services
Everything We Build in Beaverton
FAQ
Common Questions.
Can't find the answer you're looking for? Reach out and we'll get back to you within one business day.
Do you offer free estimates?
Yes
How long does a typical project take?
It depends on the size, scope, design complexity and permit process.
Typical project timelines include:
- ADUs: 45–60 days
- Home Additions: 45–90 days
- Remodels: 30–90 days
- Custom Homes: 90–160 days
- Commercial Projects: 90–160 days
How do you price a project?
Every proposal from De Marco Builders provides complete cost transparency. Our estimates clearly show the construction costs, company overhead, profit, and total project cost so clients fully understand where every dollar is allocated.
Do you require a deposit?
No. Never. We do not require an upfront deposit. The first payment is due only after a portion of the contracted work has been completed.
What happens if costs change during the project?
We guarantee the contract price through project completion unless the homeowner requests additional work beyond the original scope or unforeseen structural conditions are discovered that were not visible during the initial evaluation.
Can you work within a specific budget?
Absolutely. De Marco Builders is a budget-driven builder. We work within the client’s established budget throughout the design, engineering, permitting, and construction phases. We utilize value-engineering principles to maximize quality while maintaining budget goals.
Are you licensed, bonded, and insured?
Yes. De Marco Builders is fully licensed, bonded, and insured. We maintain all required certifications and operate in full compliance with state regulations.
How do you handle unexpected issues that come up mid-project?
Unexpected issues are rare because of our extensive experience and thorough planning process. If an unforeseen issue does arise, it is addressed immediately, typically within 24 hours. We resolve issues in a code-compliant manner while protecting the project schedule.
How often will I receive updates?
Communication is one of our highest priorities. Once a client signs a contract, we maintain frequent communication throughout design, engineering, permitting, and construction. Clients receive regular progress updates, photos, and end-of-day reports so they remain informed from start to finish.
Our Projects
Recent Work
Design-Build Custom Home in Portland
See how De Marco Builders transformed a 900 sq ft 1946 bungalow into a 2,400 sq ft custom home in just 120 days. Portland’s design-build general contractor.
Whole Home Remodel in NE Portland
Studs-out renovation: new electrical, plumbing, HVAC, two primary suites, relocated kitchen, and white oak finishes — completed in 120 days. Portland remodel contractor.
Portland Backyard Cottage ADU Built in 89 Days
One of Portland’s most efficient ADU builds: an 800 sq ft craftsman backyard cottage, fully permitted and completed in just 89 days.
Ready to Build Something
You'll Love?
Get a free consultation with our team — no commitment, just a conversation about what's possible.
Get in Touch