Remodeling Older Homes in Seattle: What Homeowners Need to Know

When I was growing up, my family took on a home renovation project that would shape the way I think about homes today. We bought a 100-year-old farmhouse on 20 acres in northeast Ohio and stripped it down to the studs. It was a huge undertaking, especially at a time when few people were restoring old homes that extensively. But that experience gave me an early appreciation for what it takes to preserve the character of an older home while making it work for modern life.

What started as a family project more than three decades ago has become a significant part of the work we do today. Thirty-four years later, century homes make up roughly a third of the houses Better Builders works on in Seattle. They are no longer a specialty, but they still reward careful planning and someone in the room who understands how they were originally built. The nuances show up the moment you start opening walls.

Table of Contents

1. Older Seattle Homes Were Built Around Different Lifestyles

2. What You Cannot See Often Matters Most

3. Seattle's Building Codes Add Another Layer of Complexity

4. Older Homes Rarely Reveal the Full Scope Up Front

5. The Goal Is Not to Erase the Home's Character

6. Remodeling an Older Seattle Home Starts With Understanding It

Older Seattle Homes Were Built Around Different Lifestyles

A 1920s craftsman or bungalow was built for the way families lived in the 1920s. Formal dining rooms. Utility kitchens that nobody gathered in. Separated rooms instead of an open concept, smaller closets, and outdoor spaces sealed off from the main floor.

We are working with a family right now that perfectly illustrates that gap. The home is a 100-year-old craftsman whose early-2000s renovation preserved the architecture, millwork, trim, and overall character.

But time has a way of revealing what's been left behind. The home's only bathroom still feels stuck in the 1980s, and the basement ceilings are so low that the third bedroom, located in the basement, barely functions.

The current owners are a young couple growing their family, with two bedrooms on the main floor (one as a home office) and the third downstairs in the cramped basement. The home’s layout is what we call a shotgun house: narrow, compartmentalized, with the front and back doors lined up straight through.

During the designer interview, the homeowner explained why they came to us. At a recent backyard barbecue, a guest had walked out of the only bathroom in the house, which is the homeowners' own bathroom, and started chatting about the brand of electric toothbrush on the counter. They laughed about it, and the homeowner joked that their dentist would be proud, but it also highlighted a bigger issue. At some point, you stop wanting every guest at the party to have a front-row seat to your daily routine.

For them, that was the tipping point. They wanted a primary suite of their own.

So that's what we're designing. We’re adding a new primary suite and a second bathroom at the back of the house, while preserving the original architecture and interior details that first attracted them to the home.

The tricky part of any addition on a Seattle craftsman is making sure the result does not look like it was tacked together like Frankenstein. On a narrow city lot, that's easier said than done, which is why we're working closely with the interior designer to ensure the exterior proportions, materials, and rooflines stay true to the original architecture.

Of course, fitting all of that into a 100-year-old floor plan is where the real design work begins. Both bedrooms have center closets, which we are removing to create a hallway that naturally runs straight back to the addition. The homeowners are giving up some kitchen cabinetry to open the wall between the kitchen and dining room, and trading a slice of backyard for the new footprint.

In return, they gain a home that works much better for how they live today and as their family grows in the future. The kitchen opens toward the backyard, durable pet-friendly finishes can handle the daily traffic in and out, and the connection between the indoor and outdoor spaces starts to feel far more natural than it ever did in the original layout.

Planning a renovation of your own? Before you start choosing finishes or interviewing contractors, download The Homeowner's Guide to Planning a Remarkable Renovation for expert guidance on budgeting, design, timelines, and the decisions that matter most.

What You Cannot See Often Matters Most

Finishes are the fun part. Tile, countertops, cabinetry, fixtures, paint. But remodeling older homes almost always begins behind the walls, where the real work of holding the house up and keeping it dry is being done by 100-year-old construction.

Foundations Determine What's Possible

The foundation is usually the biggest limiting factor. A century ago, builders worked with cinder blocks, stone, or early concrete, often with little to no footings, and on flat lots, they dug shallow. Those decisions made sense at the time, but they can create challenges when you start making significant changes to the structure today.

Once you start opening walls, those realities come into focus. Taking down a load-bearing wall, adding a large dormer, or adding a second story to a craftsman can all require reinforcing the foundation to carry new point loads. In many cases, that means reinforcing or upgrading the foundation before the project can move forward.

Every home is different. Some slab foundations can be stabilized, lifted, or underpinned. Others may already show signs of settlement or cracking that need to be evaluated before any structural work begins. Understanding what you're working with below the house is often just as important as the design decisions you're making above it.

Why Older Electrical Systems Fall Short

Electrical comes next. Older Seattle homes were not wired for the way we live today. Induction cooktops, EV chargers, mini-split heat pumps, and on-demand water heaters all want stable, well-grounded power, and often a larger panel. And if knob-and-tube wiring is still threading through any walls, it should not be a DIY job. To read more about why, read 5 Reasons to Hire a Professional for Replacing Knob and Tube Wiring.

Testing for Asbestos and Lead Before Demolition

Asbestos and lead paint need testing in any home built before about 1980. Asbestos was used as a binder in plaster, which is why surfaces such as insulation, plaster, flooring, and adhesives need to be sampled.

Lead paint is assumed in any pre-1978 home, and our Washington-certified field staff handles both safely. We also provide every client in a pre-1978 home with the EPA's Renovate Right pamphlet, which we sign together so homeowners thoroughly understand what it means to live with lead.

The Reality of Century-Old Plumbing

Plumbing in older homes is almost always galvanized steel, which does not last. What we usually find behind the walls is a patchwork of Band-Aid fixes.

How Older Homes Were Framed Differently

Framing has its own story. Many older Seattle homes were balloon-framed, with wall studs running continuously from the first floor to the roof, which weakens lateral strength. When we open those walls, we reinforce them with blocking and steel hardware to meet modern seismic standards. Undersized framing also affects insulation, since the cavities are often too thin for current R-value requirements.

Water Always Leaves a Trail

Moisture is almost guaranteed after a century of Puget Sound weather. Masonry chimneys are one of the most overlooked points of entry, since brick and mortar erode over time and the chimney begins to wick water into the house like a sponge. A failing roof is another common path, and once water starts moving inside the walls, tracking the source becomes its own project. There is a quiet upside to those chimneys, too. Many never vented fireplaces, only old oil furnaces. With modern heat pumps and tankless water heaters, removing the chimney gives back a three-by-three-foot column of square footage on every floor.

A Century of Seattle Weather Leaves Its Mark

Seattle's wet climate and decades of piecemeal renovations compound all of these issues over time. To read more about how the Pacific Northwest's marine environment shapes material choices, read Coastal Building Materials for Salt Water.

Seattle's Building Codes Add Another Layer of Complexity

Once the walls are open and the city is involved, modern code requirements often become part of the project, whether you planned for them or not:

• Energy code (insulation and air sealing)
• Window performance standards
• Seismic retrofits
• Egress requirements
• Zoning and setback rules

A good design-build partner builds these realities into the project from day one and incorporates sustainability decisions such as low-VOC finishes, eco-friendly materials, and energy-efficient mechanicals so they feel like part of the design rather than an afterthought.

Older Homes Rarely Reveal the Full Scope Up Front

After decades of doing this work, we have something close to X-ray vision. We can tell you with high confidence how a particular wall is framed and where the load paths run. What we cannot tell you, until the walls come down, is the condition of the structure itself. Dry rot in a sill plate. Insect damage in a header. A cracked floor joist. The occasional notched structural member where a previous handyman cut so much wood out of a stud that it is a small miracle the second floor is still up there.

That is what a thoughtful contingency is for, and it is why those surprises should surface in the design phase, not mid-construction when they derail the schedule. An experienced design-build team conducts three types of feasibility assessments for every project: financial, physical, and code. When design and construction sit in separate silos, with the general contractor and subcontractors brought in after drawings are complete, those gaps show up the moment a hidden condition appears.

The Goal Is Not to Erase the Home's Character

The best remodels of older Seattle homes preserve what makes them lovable, like warmth, quality craftsmanship, proportions, and natural materials, while improving what no longer works for modern life: comfort, function, energy efficiency, and a floor plan that fits the family living there today.

Seattle homeowners who choose a craftsman, bungalow, mission, or genuine midcentury home are usually drawn to its architectural character and want to keep it. Builder-grade subdivision houses, especially 1970s split-levels, are the ones people most often want to improve rather than preserve.

Most homeowners aren't looking to remodel a century-old home into something completely different. They want the house to function better for their family while still feeling like the home they fell in love with in the first place.

Remodeling an Older Seattle Home Starts With Understanding It

The most successful older-home remodels in the Seattle area, including Magnolia, West Seattle, Bellevue, Mercer Island, Kirkland, and Redmond, are not aesthetic updates. They are about understanding how the home was built, where it no longer fits everyday life, and how to move it forward without losing what made it special.

If you are weighing a whole-home remodel, a kitchen remodel, a bathroom remodel, or another home improvement on an older Seattle home, choose a remodeling team that has done this work before. The right remodeling contractor treats your home as one-of-a-kind, not a generic remodeling project, and brings remodeling services and trades together under one roof so design and construction stay aligned.

With the right partner, you can have a Seattle home that honors its history and finally works the way you live. When you are ready, reach out to Better Builders for a consultation.

The best remodeling projects start with a plan. If you're considering renovating an older Seattle home, our free guide will help you understand the decisions, tradeoffs, and planning steps that lead to a smoother project and better results.

Download The Homeowner's Guide to Planning a Remarkable Renovation and start your project on the right foot.