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Need more space but love your Tacoma neighborhood? A room addition lets you expand your home on your existing lot — adding the bedrooms, bathrooms, or living space your family needs without the cost and disruption of moving.
Cascade Pro, Inc designs and builds custom room additions throughout Tacoma and Pierce County, handling everything from architectural design and engineering to permits, construction, and final inspection.
Every home and family is different. Here are the most common types of additions we build:
Add one or more bedrooms to accommodate a growing family, create a dedicated guest room, or build a primary suite with en-suite bathroom and walk-in closet. Bedroom additions are one of the most requested projects and add measurable value to your home.
Whether it’s a full bathroom, half bath, or expanding an existing small bathroom — adding a bathroom solves one of the most common homeowner complaints. We handle plumbing, tile, fixtures, ventilation, and all finishes.
Expand your home’s common areas with a new family room, sunroom, or great room. These additions create the open, comfortable living space modern families want without changing the rest of your floor plan.
When your lot doesn’t allow outward expansion, going up is the answer. A second-story addition can double your living space. We handle the structural engineering needed to support the new floor and tie the new level into your existing roofline.
Every room addition project follows a structured process to keep timelines tight and surprises to a minimum:
A room addition is a major investment that permanently changes your home — so it has to be done right. Cascade Pro brings the experience, licensing, and project management to deliver additions that feel like they’ve always been part of your house. Tacoma is Pierce County’s largest city with a strong rental market, growing population, and increasing property values — making home improvements a solid long-term investment.
Room addition costs in Tacoma vary widely based on the size of the addition, complexity, foundation requirements, and finishes. A small single-room bump-out will cost significantly less than a multi-room or second-story addition.
Key factors that influence your project budget:
We provide detailed, line-item estimates after our initial property evaluation. You’ll know the full scope and cost before we break ground.
That depends on your lot size, zoning setback requirements, and lot coverage limits. During our consultation, we evaluate your property to determine the maximum addition size your lot can support within local building codes.
Absolutely — that’s a core part of our design process. We match the roofline, siding, trim, and architectural details so the addition looks like it was always part of the original home. Mismatched additions hurt resale value, so we take integration seriously.
Most room additions take 3 to 8 months from design through completion, depending on size and complexity. A single-room bump-out is faster than a multi-room or second-story addition. We’ll provide a realistic timeline during our initial assessment.
In most cases, yes. We plan the construction sequence to minimize disruption to your daily life. There will be some noise and activity, but we keep work areas contained and communicate the schedule so you know what to expect each week.
We handle the design and architectural work in-house, coordinating with licensed architects and structural engineers as required by your project. You don’t need to hire a separate architect — it’s all included in our full-service approach.
Adding permitted square footage to your home will likely increase your assessed value, which may affect property taxes. However, the increase in your home’s market value typically far exceeds the tax impact. We recommend consulting with a tax advisor for specifics.
Don’t let a lack of space push you out of the neighborhood you love. Cascade Pro, Inc builds custom room additions throughout Tacoma that give your family the space it needs while adding lasting value to your property.
Call us today: (253) 338-1693 or fill out the form to schedule your free consultation.
Tell us about your room addition project. We offer free consultations for Tacoma homeowners.
As Pierce County's largest city, Tacoma offers a diverse housing landscape that spans historic Craftsman homes in the Stadium District and North End to mid-century ramblers in South Tacoma and newer developments along the waterfront in Ruston. Each neighborhood comes with its own zoning requirements and architectural character that we understand inside and out.
Tacoma's ongoing revitalization — from the Hilltop Link Extension to the Dome District redevelopment — has made home improvement one of the smartest investments in the region. Whether your property sits near Point Defiance Park, along 6th Avenue, or in the Eastside, our team knows the local permitting process through Tacoma's Planning and Development Services and works within the city's specific ADU, remodeling, and building codes to keep your project on track.
We've completed projects across Tacoma's most popular neighborhoods including Proctor, Old Town, Lincoln, McKinley Hill, and the Narrows. Our familiarity with local soil conditions, setback requirements, and historic district guidelines means fewer surprises and a smoother build from start to finish.
