Skip to main content Skip to content Room additions, second stories, primary suites, and bump-outs that match your existing home seamlessly. Woodland Construction Group designs and builds additions across Hillsboro, one accountable team handling structure, systems, and finish.
Planning a home addition in Hillsboro, Oregon? An addition is one of the most structurally involved projects a homeowner can take on. It ties new foundation, framing, roofline, and systems into an existing house so the result looks original, not bolted on.
Done right, it gives a growing Hillsboro family the room it needs, a new primary suite, a bigger kitchen, a home office, without giving up the lot, schools, and commute they chose. Matching the addition to the existing home is where craft matters most.
The right partner engineers the connection properly, navigates Hillsboro setbacks and zoning, and blends the new space into the old so seamlessly you cannot tell where one ends and the other begins.
A home addition in Hillsboro typically runs $250 to $550 per square foot, with most projects landing between $50,000 and $300,000+ depending on size, whether it is single or second story, and the rooms involved.
Adding square footage where you already live is often more practical than buying up in Hillsboro’s tight market, and a well-matched addition adds both daily livability and resale value to the home.
Design-build experience serving Hillsboro
West-side metro homes transformed
Across Google, Houzz & Yelp reviews
Craftsmanship warranty on every project
An addition solves the exact problem a growing household has: not enough room, in a home and neighborhood you do not want to leave. Instead of buying up in a competitive Hillsboro market, you add the space you actually need, where you already are.
The 2026 addition is about fit. A new primary suite, expanded kitchen, family room, or home office is designed to match the existing rooflines, siding, and proportions so it reads as part of the original house, inside and out.
Built and matched well, an addition delivers immediate livability and lasting resale value. For many Hillsboro families near Intel and Genentech, it is the most direct way to get the home they need without changing their commute or their kids’ schools.
Woodland Construction Group · 18 Years Experience · Serving Hillsboro, Oregon
Our licensed team designs and builds additions across Hillsboro and Washington County, engineering the structural connection and matching materials so new space integrates seamlessly with your existing home.
A well-matched addition in Hillsboro lets a growing family stay near their schools, parks, and Silicon Forest commute while adding exactly the room they need.
Hillsboro lots set the strategy. Many mid-century ranches near Reedville and Jackson School sit on generous lots with room to add out, a primary suite, a family-room bump-out, or an expanded kitchen, while staying within City of Hillsboro setbacks.
Tighter lots in Orenco Station and the newer South Hillsboro communities of Reed’s Crossing and Witch Hazel Village often point to building up instead, with a second-story addition that adds bedrooms and a suite without consuming yard. We assess lot coverage, setbacks, and structure to recommend the right direction.
Additions require structural, building, electrical, plumbing, and mechanical permits and a zoning review for setbacks and lot coverage, all handled through the City of Hillsboro Permitting Center on East Main Street. We manage the full approval and inspection process from the start.
Six addition types cover most of what Hillsboro families ask for. Each is engineered to tie into the existing home structurally and match it visually, so it never looks like an afterthought.
Single-story additions for a family room, bedroom, office, or sunroom, tied into the existing foundation, roofline, and systems.
Full or partial upper-level additions that add bedrooms and a suite without expanding the footprint, engineered for the existing structure.
A new owner’s suite with bedroom, spa bath, and walk-in closet, sized and finished as a private retreat within the home.
Expanding the kitchen or dining area outward for an island, eat-in space, or open flow into a new family room.
Attached suites with their own bedroom, bath, and sometimes a kitchenette for multigenerational living, built to code.
New or expanded garages with bonus rooms above, adding storage, parking, and flexible living space in one structure.
How We Work
One team, one contract, from the first measurement to the final walkthrough, with no handoffs between designer, builder, and trades: design and 3D layouts, material selection, permitting and inspections, careful demolition, licensed construction, and a final walkthrough, all backed by our 1-year craftsmanship warranty.
See our full design-build processA look at how we add room that matches the original home seamlessly across Hillsboro and the west-side metro.
Walk through how size, single versus second story, and room type shape the number, with guidance built on real Portland-area addition data.
Engaging with Woodland for our home extension was a great decision. They were attentive to our vision, offered valuable insights, and completed the project on time. Their commitment to quality and craftsmanship is truly impressive.
A huge thank you to Woodland Construction Group for the beautiful job they did on our home extension. High-quality craftsmanship throughout.
Woodland Construction Group is an expert in their field. We are very satisfied with their work.
Timelines, permits, cost, and what to expect in 2026. If your question is not here, call us. We would rather answer it directly.
A typical Hillsboro addition takes 3 to 6 months depending on size, whether it is single or second story, and the rooms involved. Second-story additions and primary suites run toward the longer end. We build a phase schedule during design and manage every trade to it.
Additions in Hillsboro generally run $250 to $550 per square foot, with most projects between $50,000 and $300,000+. Second stories, primary suites, and additions that relocate plumbing or structure cost more. You get an itemized estimate after the design phase.
Yes. Additions require structural, building, electrical, plumbing, and mechanical permits plus a zoning review for setbacks and lot coverage. Woodland prepares the full permit set and coordinates every inspection through the City of Hillsboro Permitting Center.
It depends on lot size, setbacks, and lot coverage limits. Larger mid-century lots often allow building out, while tighter Orenco and South Hillsboro lots favor a second story. We assess your specific property and recommend the most cost-effective direction.
Yes, and it is where we focus. We match rooflines, siding, windows, and interior finishes so the addition reads as original. A seamless match is what separates a quality addition from an obvious bolt-on.
Usually, yes. Because most of the work happens on the new structure before it connects to the home, families can often stay in place, with short disruptions when we tie the addition into existing rooms and systems.
For many families, yes. Adding the space you need where you already live is often more practical than buying up in Hillsboro’s tight market, and a well-matched addition adds both daily livability and resale value.
Family-owned and based in Northwest Portland, we build home additions across Hillsboro and the surrounding Washington County communities.
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Book a free in-home consultation. We will assess your lot, setbacks, and structure, talk through budget, and give you an itemized plan with no pressure and no handoffs.
