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Serving States — WA & OR
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Expand your space without leaving your home. Nick and Sons Design Build specializes in home additions in Portland, OR, delivering seamless additions that match your lifestyle, your needs, and your existing home. Whether you need an extra bedroom, a larger kitchen, or a full second-story addition, we design and build it right — the first time.
A home addition is more than just additional space — it’s a flexible solution that adapts to your lifestyle and long-term goals. Whether you’re creating a private living area for family, adding a dedicated home office, or simply expanding your living room to fit the way your family actually lives, a well-planned addition delivers lasting value.
With the permitting process and specific building requirements, having an experienced local contractor matters. At Nick and Sons, we handle all permits, approvals, and code compliance for home additions in Portland, OR — so you don’t have to.
A great home addition in Portland, OR isn’t just about adding square footage — it’s about creating a space that integrates perfectly with your existing home in both design and function. Poorly planned additions look like afterthoughts. Ours don’t.
Bedrooms, offices, living spaces
Maximize space without expanding footprint
Create open, modern layouts
Turn unused space into functional living areas
Comfortable spaces for family
Nick and Sons is a family-owned design and build company committed to quality craftsmanship, thoughtful planning, and lasting results. We work closely with homeowners to create functional, beautiful spaces through a streamlined process and attention to every detail.
We start by understanding your goals, space, and budget to ensure everything is aligned from the beginning.
We create layouts, concepts, and when needed, 3D visualizations to bring your ideas to life with clarity.
Our team handles approvals, permits, and all site preparation so your project is ready for construction.
We manage construction with precision and complete a final walkthrough to ensure every detail meets our standards and your expectations.
Home additions can quickly become complicated without proper planning and coordination. Poor communication, unclear timelines, and inexperienced contractors often lead to delays, unexpected costs, and results that don’t match what was promised.
At Nick and Sons, we take a structured and proactive approach to avoid those problems from day one — ensuring your home addition runs smoothly and delivers exactly what was agreed on.
We take the time to plan every detail so there are no surprises later.
You always know what’s happening and what to expect next.
From structure to finish, quality is never compromised.
A home addition in Portland, OR is a major investment — but it doesn’t have to feel overwhelming. With flexible financing options, you can start your project sooner and spread the cost over time, making your addition more accessible without putting unnecessary strain on your budget.
At Nick and Sons, we help you explore financing solutions that fit your specific situation. Whether you’re planning a single room addition or a full second-story build, we’ll guide you through options that make your project achievable, with no confusing fine print and no pressure.
One of the first questions every homeowner asks is: what’s this going to cost? The honest answer is that home addition pricing isn’t one-size-fits-all — and anyone who gives you a flat rate without understanding your project is guessing. Here’s a straightforward breakdown of what drives cost so you can plan with confidence.
Square footage is the starting point, but scope matters just as much. A simple bedroom addition involves framing, insulation, drywall, flooring, and windows. A full second-story addition involves structural engineering, roofline changes, stair access, and significantly more labor. Larger scope means more cost — but also more value added to your home.
The category of addition directly affects budget. In-law suites with full kitchens and bathrooms cost more than a single room expansion. Second-story additions involve more structural complexity than single-floor builds. Kitchen expansions with custom cabinetry and new appliances carry different costs than a basic living room extension. We’ll walk you through realistic numbers for your specific project from the very first conversation.
The materials you choose — from siding and roofing to flooring and trim — have a direct impact on cost. We offer options at multiple price points without compromising structural quality. Whether you want budget-friendly finishes or premium custom materials, we’ll match the addition to your existing home and your investment goals.
We handle the full permitting process, but these fees are part of your project budget. Site conditions — soil, slope, existing foundation — can also affect cost. We identify these factors during the planning phase so there are no surprises mid-project.
The only way to give you a number we’ll actually stand behind is to understand your specific project. We offer free consultations and detailed written estimates with no hidden fees. No guesswork, no lowball bids followed by change orders. Contact us today to get started.
One of the biggest concerns homeowners have before starting an addition is the permitting process. Cities have specific building codes and zoning requirements that must be met for any structural addition — and navigating them on your own can be time-consuming and confusing.
At Nick and Sons, we manage the entire permitting process for your home addition. That includes:
You don’t need to become an expert in local building code. That’s our job. We handle permits and compliance so you can focus on planning the space — not the paperwork.
There’s no shortage of contractors in Southwest Washington. So why do homeowners keep choosing Nick and Sons? It comes down to a few things that matter when you’re investing in a major project.
From design through final inspection, Nick and Sons manages the entire home addition process. You won’t be handed off to subcontractors you’ve never met or left to coordinate between multiple companies. One team, one point of contact, one accountable contractor from start to finish.
Local knowledge matters in construction. We understand zoning requirements, permit timelines, neighborhood architectural styles, and the Pacific Northwest climate conditions that affect how we build. That expertise shows up in every project we complete.
The number one complaint homeowners have about contractors is communication — or the lack of it. At Nick and Sons, we set clear timelines, provide regular updates, and tell you the truth about what’s happening on your project. If something changes, you hear it from us first.
We build home additions in Portland, OR that are meant to last decades — not just pass inspection. Structural integrity, quality materials, and attention to detail at every stage means you get an addition that holds up to Pacific Northwest weather and everyday family life.
A home addition is a significant investment, and we want to make it achievable. Nick and Sons offers flexible financing options so you can start your project sooner and spread the cost over time. Ask us about financing during your free consultation.
Every addition starts with a reason. Here are the most common ones we hear from homeowners:
Whatever your reason, Nick and Sons has the experience to help you plan it, permit it, and build it right.
Nick and Sons Design Build is a home addition and design-build contractor serving Portland, OR and the surrounding Southwest Washington area. We specialize in room additions, second-story builds, kitchen expansions, garage conversions, and in-law suites — for homeowners who want more space without leaving the home they love.
Our team handles everything from the initial consultation through final walkthrough, so you have one point of contact and no surprises mid-project. We show up on schedule, communicate clearly, and don’t consider the job done until your addition looks and feels like it was always part of your home.
We offer free estimates with a quick turnaround. Call us at +1 (360) 703-7510 or submit our online form by clicking here.
Request a free, no-obligation quote for your home addition in Portland, OR
We show up, we do the work right, and we build additions that feel like they were always part of your home.
The timeline depends on the size and complexity of the project, but most home additions take several weeks to a few months from start to finish. We provide a clear timeline upfront and keep you informed throughout the process.
Yes. Almost all home additions in Portland, OR require permits from the City of Portland, depending on the scope of work. This includes structural additions, second-story builds, garage conversions, and in-law suites. At Nick and Sons, we manage the entire permitting process for you — from application to final inspection sign-off. You don’t need to navigate the local permit system on your own.
Absolutely. We design every addition to blend seamlessly with your current home — both structurally and visually — so it feels like it was always part of the original design.
In many cases, yes. Depending on the scope of work, you may be able to stay in your home while construction is ongoing. We’ll discuss this with you during planning and minimize disruption as much as possible.
Home addition costs in Portland, OR vary based on the type of addition, square footage, materials, and site conditions. A small room addition may start around $80,000–$120,000, while a second-story addition or in-law suite can range significantly higher depending on scope. The only way to give you a number we’ll stand behind is to evaluate your specific project. We offer free consultations and detailed written estimates with no hidden fees.
Let’s design and build a home addition that adds space, value, and long-term potential to your property, with a team you can trust from start to finish.