Home Additions in Hillsboro & Nearby OR. Areas

If you love your home but need more space, consider adding a custom-built home addition. At Keith Green Construction, we help Hillsboro homeowners increase their living space by providing custom additions that look as though they have always been part of the family. Whether you want a guest suite for visiting family, an expanded dining area, or perhaps a bonus room or loft as a multipurpose family space, our creative team of designers and experienced builders is sure to help redefine your home.

With over 30 years of construction experience, we’re more than just builders—we’re partners in helping you enhance your lifestyle and increase your home’s long-term value. From concept to completion, we provide expert guidance, high-quality craftsmanship, and dependable communication at every step of your project.

Room Additions That Blend with Your Existing Home

We know the importance of blending the new with the old so that it is not an extra piece that appears slapped on your home. Behind every design plan is our thorough design-build process, making sure you get a picture-perfect room that looks like it was always supposed to be there. We take great care to match materials, rooflines, trim — everything from the old world as it transitions into the new.

We construct home offices, dens, laundry rooms, kids’ bedrooms, and casual living spaces. We work within your existing structure to identify the perfect position and design to meet your needs—and have you back in living as quickly as possible.

Additions for Growing Families and Modern Lifestyles

Your home should grow and evolve with your needs and those of your family. Many Hillsboro families need square footage so that they can navigate significant life transitions in the same home — like having a baby, supporting elderly parents (or both!), or improving work-from-home scenarios. These rooms and bathrooms are climate-controlled and sound-insulated, making them perfect for an executive suite.

Our kitchen bump-outs and nook expansions are perfect for households needing more storage, dining space, or improved traffic flow. We design these additions to improve everyday functionality while complementing your home’s aesthetic and increasing its overall value.

Bonus Rooms, Lofts & Flexible Living Areas

Need extra square footage without completely reconfiguring your home? We specialize in building bonus rooms and upper-level lofts that can serve various purposes—playrooms, home theaters, craft spaces, or even dual-use guest/office combos.

We also convert underused areas into livable square footage for homes with attic or garage space. Every addition is carefully engineered, insulated, and finished to meet building codes and maximize comfort. Whether your goal is expansion or transformation, we deliver the creative solutions and technical expertise to make it happen.

Why Hillsboro Homeowners Count on Keith Green Construction

Keith Green Construction has earned the trust of Hillsboro homeowners by providing dependable, detail-focused construction services since 1993. Our local knowledge, skilled team, and commitment to quality set us apart. We guide clients through the home addition process with transparency, professionalism, and a deep respect for your home and time.

As licensed general contractors, we manage the entire scope of work—from initial design and permits to structural work, electrical, plumbing, and final inspections. You don’t have to worry about coordinating with multiple subcontractors. With Keith Green Construction, you get one experienced team that does it all—and does it right.

Home Addition FAQs

Q: Can you match my current home’s siding, roof, and trim?
A: Absolutely. We take extra care to source matching materials or near-perfect substitutes so your new addition looks completely cohesive with the existing structure.
Q: Do you help with designing the layout and structure?
A: Yes. We collaborate with you to design an addition that maximizes space, meets building codes, and aligns with your home’s style. Our goal is to create a layout that works and feels right.
Q: How do I get started with a home addition in Hillsboro?
A: Just reach out! We’ll schedule a free consultation to discuss your ideas, assess your property, and provide a clear plan with a timeline and pricing.

Proudly Serving Hillsboro and Surrounding Communities: Beaverton, Aloha, Forest Grove, Cornelius, North Plains, Sherwood, and more.