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Need more space but love your Bonney Lake 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 Bonney Lake 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. Bonney Lake’s high incomes, growing population, and family-oriented community make it a prime location for home improvement investment. The combination of newer construction and expanding neighborhoods creates strong demand for quality contractors.
Room addition costs in Bonney Lake 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 Bonney Lake 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 Bonney Lake homeowners.
Bonney Lake has been one of Pierce County's fastest-growing cities over the past two decades, with its population nearly doubling as families are drawn to the area's scenic setting between Mount Rainier and the Puget Sound lowlands. This growth has driven strong home values and made property improvements here a particularly smart investment.
Much of Bonney Lake's housing was built from the 1990s onward, giving the city a relatively newer housing stock compared to Tacoma or Puyallup. However, many of these homes were built with unfinished basements, oversized garages, or large lots that are now perfect for conversions, additions, and ADU construction as homeowner needs evolve.
We understand Bonney Lake's specific building codes and work with the city's Community Development Department on permits and inspections. The terrain here — with its rolling hills, established tree cover, and varied soil conditions near Lake Tapps and the plateau areas — requires contractors with local grading and drainage expertise. Our team has completed projects across Bonney Lake neighborhoods including Emerald Hills, Lake Tapps, Sky Island, and the Fennel Creek corridor, and we bring that ground-level familiarity to every build.
