Search for the best addition remodelers in Portland, and you’ll find plenty of companies promising quality work, clear communication, and beautiful results. Those claims sound good. They don’t tell you much about what it would actually be like to plan an addition with that company.
An addition asks a lot of a remodeler. New foundations, framing, utilities, rooflines, and interior spaces all have to connect to a house that may be several decades old. On a tight Portland lot, the available options can narrow before the first floor plan is drawn.
People planning additions within Creekstone’s Portland remodeling service area, including Lake Oswego, Beaverton, Tigard, and the West Hills, also face different zoning, site, and architectural conditions. The best company for your addition will depend on your house, priorities, budget, and preferred way of working.
In this guide, you’ll compare eight Portland home addition remodelers, see where each firm’s experience may fit, and learn which questions reveal how a team handles design, pricing, permitting, construction, and the connection between old and new.
A strong addition remodeler should be able to explain what’s possible, what isn’t, and what needs further investigation before presenting a finished design.
This isn’t a formal ranking, and placement on the list isn’t a guarantee that a company will suit your project. We reviewed publicly available information from company websites, portfolios, process pages, and published project descriptions.
We looked for firms that demonstrate:
Experience with home additions or substantial structural remodeling
A defined approach to design, planning, and construction
Familiarity with Portland-area houses and permitting
Completed work that homeowners can review
A clear specialty or project type
Enough information to help a homeowner decide whether to schedule an interview
Information was reviewed in August 2026. Services, team members, pricing, and availability can change, so confirm current details directly with each company.
Below, we’ve highlighted eight Portland addition remodelers and the types of projects or homeowners each may be best suited for.
Yes, we’re including ourselves. We know what we do well, and we also know we won’t be the right firm for every Portland homeowner.
Creekstone is a design-build remodeling company for people who want to understand the project before construction begins. We use 3D modeling to test layouts, work through selections and costs during design, and place the finished scope under a fixed-price contract. Every remodel is also backed by a 10-year warranty.
Our addition work can include second stories, primary suites, kitchen and family-room expansions, in-law spaces, and other structural changes. The first conversation isn’t about convincing you to add square footage. It’s about figuring out whether the house truly needs more room or whether its existing space could work harder.
That education-first approach comes from John May’s unusual mix of design, construction, and business consulting experience. You can read more about how Creekstone began, review our design-build process, or browse the remodeling gallery.
Lamont Bros. is an established Portland-area design-build company with experience in additions, ADUs, kitchens, bathrooms, basements, and whole-home renovations.
Its published addition work includes second-floor expansions and additions to older houses. The company also has a substantial project portfolio and serves Portland, Beaverton, Lake Oswego, West Linn, Oregon City, and parts of Southwest Washington.
THE Remodel Group places considerable emphasis on feasibility before design proceeds.
That can be particularly useful when a property has a steep lot, limited buildable area, environmental restrictions, or other conditions that make a standard rear addition difficult. The company discusses alternatives such as building upward, working downward into a basement, or using a gable expansion to create usable upper-level space.
Its addition services also address aging in place. Examples include main-level primary suites, accessible entries, safer exterior routes, wider doorways, and zero-threshold transitions.
Metke Remodeling & Luxury Homes has served the Portland area for more than 30 years and operates from Lake Oswego.
The company’s addition work includes second floors, bedrooms, kitchens, bathrooms, home offices, indoor-outdoor rooms, entertainment areas, and larger guest spaces. Design, carpentry, and project management are handled through an integrated design-build model.
Hammer & Hand is a Portland general contractor known for architect-led construction, historic remodeling, exacting carpentry, and high-performance building.
Its published additions range from modest mudroom expansions to major architectural projects. Portfolio examples show experience connecting contemporary additions to older houses, improving building performance, and preserving details from Craftsman, Tudor, Victorian, and other established styles.
Neil Kelly has been part of the Northwest remodeling industry since 1947. It’s a large, full-service design-build company with experience in additions, ADUs, whole-home remodeling, historic properties, accessibility, and energy improvements.
The company is also a Certified B Corporation and has made sustainability and community responsibility visible parts of its identity. Its Portland operation includes designers, consultants, project managers, and craftspeople rather than a small owner-led crew.
Acorn to Oak Remodeling has a smaller online presence, but its stated specialty is unusually specific.
The company focuses on maintaining the character and livability of Portland houses while integrating additions, remodels, and ADUs. Services include design, 3D rendering, permit-ready drawings, construction documents, general contracting, and custom cabinetry. Acorn to Oak is also listed as a contractor approved for Portland’s Field Issuance Remodel program.
Graphite Design Build combines residential design, construction, permit support, and structural or energy upgrades.
Its work includes additions, remodels, ADUs, studios, outdoor structures, seismic improvements, insulation, air sealing, and window or door upgrades. The company also prepares permit-ready documents and coordinates with engineers for structural drawings and calculations.
The best addition remodeler for you will depend on the type of project you’re planning, how much design support you want, the complexity of your property, and how you prefer to work with a remodeling team.
Comparing addition remodelers requires more than placing three estimates next to one another.
One contractor may be pricing a basic concept. Another may be pricing a developed plan with structural input, selections, allowances, permits, and site work included. The lower number doesn’t tell you much until you know what sits behind it.
Ask each company to walk you through these areas:
How will the team evaluate zoning, setbacks, lot coverage, utilities, trees, site access, and the condition of the existing house?
Is design completed in-house, through a regular architectural partner, or by someone you must hire separately?
When will you receive an initial range? How does that number become a construction price, and what could still change after the contract is signed?
Who brings in the engineer? How are the foundation, roof, framing, and mechanical systems evaluated before work begins?
Portland requires a building permit for residential additions. Larger or more complicated projects may also involve trade permits, zoning review, engineering, and additional notification requirements. Find out who prepares the documents and responds to plan-review comments.
Who will supervise your project? How often will that person be on site, and where will schedule updates and decisions be documented?
A company should be able to answer these questions without steering the conversation back to finishes or inspiration photos.
A useful consultation should leave you with a clearer understanding of the house, even if you haven’t settled on a design.
Look for signs that the remodeler is paying attention to the actual property:
They ask when the house was built and what work has already been completed.
They want to know why the current layout fails, not simply how many square feet you want.
They examine likely connection points between the addition and the existing structure.
They discuss access for excavation, material deliveries, and crews.
They raise questions about roof geometry, floor height, drainage, electrical capacity, plumbing, and HVAC.
They explain which ideas need zoning or structural confirmation.
They ask how long you expect to remain in the house.
They can identify situations where reworking existing rooms may be smarter than building out.
Pay attention when a remodeler challenges an assumption. A good question asked early can save months of designing the wrong project.
Creekstone’s design-build approach moves major decisions out of construction and into the planning phase, where there’s still room to compare options without paying to undo completed work.
We begin by learning what the house is asking you to tolerate. Maybe the dining table has become the homework station, office, and storage overflow. Perhaps an older parent needs a bedroom and full bathroom without stairs. In another home, the kitchen works until more than two people enter it.
Then we test the premise. Do you need an addition, or could a different layout solve the same problems? Would a small bump-out make enough difference? Does a second story protect more of the yard? What happens to the rooms beside the proposed addition?
Our designers and construction team work through those questions together. Three-dimensional models help you see the relationship between spaces, while early construction input keeps the design grounded in what the house and budget can support.
Before building begins, the design, selections, scope, price, and schedule are established. You can see how that approach works across our Portland remodeling services.
We’d rather spend more time asking questions at a table than make an expensive discovery after the house is open.
Some Portland addition remodelers worth considering include Creekstone Design + Remodel, Lamont Bros., THE Remodel Group, Metke Remodeling & Luxury Homes, Hammer & Hand, Neil Kelly, Acorn to Oak Remodeling, and Graphite Design Build. The right choice depends on your project type, budget, design needs, and preferred working relationship.
Look for demonstrated addition experience, a clear planning process, local permitting knowledge, detailed pricing, relevant portfolio work, and a defined system for managing construction.
An addition contractor should also be willing to discuss the parts of the project that aren’t visually exciting. Foundations, drainage, structural connections, mechanical systems, and site access can have more influence on the project than the final countertop.
Design-build can be a good choice when you want design, estimating, engineering coordination, and construction decisions developed together.
An addition can become difficult when a finished architectural plan reaches a contractor and costs considerably more than expected. Bringing construction knowledge into design allows the team to discuss budget and feasibility while alternatives are still available.
Yes. Portland requires a building permit when an addition expands a house’s footprint or adds space vertically. Electrical, plumbing, and mechanical permits may also be required based on the work.
Most additions need structural plans, and the property must comply with applicable zoning requirements. Larger additions may be subject to additional neighborhood notification and delay rules.
A Portland home addition can take several months to design, permit, and build, with larger or structurally complicated projects taking longer.
Ask remodelers for the full timeline rather than construction duration alone. Design development, engineering, selections, permit review, material ordering, and site preparation all occur before or around the visible building work.
Many homeowners can remain home during at least part of an addition, but it depends on where the new structure connects and which rooms or systems will be affected.
A rear family-room expansion may take the kitchen offline. A second-story addition can affect stairs, roofing, bedrooms, and weather protection. Your remodeler should explain the expected disruption before construction and help you determine whether temporary housing is practical.
You should consider an addition when your home genuinely lacks the rooms or square footage needed to support your household.
A remodel may be the better answer when enough space exists, but poor circulation, closed rooms, or unused areas keep it from working. Studying both possibilities before committing to one can lead to a smaller and more effective project.
The best addition remodeler is the one who understands the problem before drawing the solution.
Creekstone Design + Remodel has spent nearly two decades helping Portland-area homeowners make those decisions through design, construction knowledge, and direct conversations about cost. We’ll tell you when an addition makes sense, and we’ll also tell you when the house may already contain the space you need.
If your home has reached the point where borrowing space from another room no longer works, contact Creekstone to begin sorting through the options.