Transforming Eastside and Greater Seattle Homes with
Custom Additions and ADUs

Seattle Home Addition Contractor & ADU Builder

Upgrade your home with a trusted Seattle addition contractor and ADU builder . Specializing in custom home additions, extensions, detached and attached ADUs, and energy-efficient upgrades, we provide exceptional craftsmanship and satisfaction from over 14 years of expertise.

Professional Builder

5 Star Rated Seattle Construction Company

14

Years of
Experience

+100

Completed
Projects

Professional Addition & ADU Contractor
in Bellevue, WA

What’s Included in Our Home Additions and ADUs Services

ADU (Accessory Dwelling Unit) Services: Increase your property’s value with BLC Remodeling’s ADU services. We specialize in both attached and detached ADUs, ensuring compliance with Seattle’s housing laws. Whether for additional income or extra living space, our team guides you from design to completion, making your property more functional and valuable.”

Home Addition Services: Expand your living space with BLC Remodeling’s home addition services. From room extensions to custom designs, we tailor solutions to meet your needs. Our team ensures seamless integration with your existing structure, enhancing both aesthetics and functionality and providing comprehensive support from design to construction.

Professional Home Addition Contractor and ADU builder

Let's Talk About Your Remodeling Project

Complimentary Estimate and Expert Guidance from experienced Professionals.

Our ADU and Addition Services

Attached ADUs

These units are directly connected to your existing home, providing rental income or extra family space. We specialize in efficient design and high-quality construction for seamless integration.

Detached ADUs

These stand-alone units provide flexible living options, such as rental income or guest accommodations. Our team ensures high-quality construction and compliance with local regulations.

Home Additions

Enhance your home’s functionality and value with custom home additions. Whether you need a new bedroom, office, or in-law suite, our additions seamlessly blend with your existing structure.

Home Extensions

Professional custom home extensions services. Whether you’re looking to enlarge your kitchen, living room, or add a sunroom, our extensions integrate seamlessly with your existing home.

GALLERY

Some Previous Successful Home Extensions Projects in Seattle, WA

Licensed, Insured, and Trusted Contractor

Our team is fully licensed and insured, ensuring that your project is managed with the highest standards of professionalism and safety. Our reputation for reliable service is backed by numerous satisfied clients who trust us with their homes.

Local Permit and Zoning Expertise

With extensive knowledge of Seattle’s local building codes and permit processes, we ensure your project complies with all regulations. This expertise makes the construction process smooth and hassle-free.

Personalized Solutions

We offer tailored solutions to meet your unique needs, whether you prefer modern designs or traditional aesthetics. Our custom home additions and ADUs enhance your home’s functionality and value, reflecting your personal style.

Quality Craftsmanship

We use only the best materials and sustainable building practices to ensure durability and aesthetics. Our skilled craftsmen are dedicated to delivering exceptional results, ensuring every detail is meticulously crafted to the highest standards.

Experienced and Dependable

With over 14 years of experience, BLC Remodeling LLC has the knowledge and skills to handle any home addition or ADU project. We are committed to completing projects on time and within budget, maintaining open communication with our clients throughout the process.
kitchen-remodeling-bellevue

Schedule an Estimate

Looking for a local Home Extension contractor in Seattle? Contact us today to schedule a free consultation, and let us transform your home with our custom remodeling services.

Achieve Your Dream Home With Our Process

Simplified Seattle Home Extension Process

1.

Schedule a Consultation

Reach out to us via phone or our contact forms .

2.

In-Home Assessment

We’ll schedule a visit to your home to understand your vision

3.

Receive a Detailed Quote

We’ll provide a detailed quote and project timeline.

4.

Schedule and Begin Work

Once you approve the quote, we'll schedule your project and begin the work.

Start Your Home Transformation Today

Schedule Your Seattle ADU or Addition Estimate

Call us anytime, we strive to answer all inquiries within 24 hours.

BLC Remodeling
5.0
Based on 23 reviews
powered by Google
Cassandra LeeCassandra Lee
17:52 17 May 24
We've hired BLC Remodeling for 2 separate projects and would highly recommend reaching out to them for your next home project. Overall, they were a pleasure to work with and were very attentive throughout the whole process. They understood our vision for both remodels and executed them beautifully.The first project was a complete gut of our main floor that included kitchen, dining and living room. They leveled out a sunken living room floor and moved our entire kitchen to fit our dream kitchen island. The crew worked on this massive project while we stayed at a separate location. We were impressed by their communication while we were remote and their adaptability with the supply chain issues to meet our project deadline without sacrificing quality.We hired BLC recently to remodel our laundry/half bath. They once again helped reconfigure the layout to make the space more functional and fit a new shower. This modernized bathroom has become the favorite of the house. Photos are the before and after (prior to shower glass install).We are absolutely delighted by the transformations they've done and plan on contacting them again for future project.
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Frequently asked questions

Adding a 1,000 square foot addition to a home in Seattle generally costs between $85,000 and $220,000. The total cost depends on design complexity, material choices, and local permit requirements​

Adding an addition to your existing home is generally more cost-effective than building a new house. Home additions make use of existing infrastructure and utilities, which can significantly reduce costs. However, the total expense will depend on the size and complexity of the addition, as well as the materials used.

The cheapest type of home addition is typically a single-room extension, such as a sunroom or a small bedroom. These additions require less structural work and fewer materials compared to multi-room additions or second-story expansions. Costs can be further minimized by choosing cost-effective materials and designs.

The timeline for home additions varies depending on the project’s scope and complexity. On average, a small addition like a single room can take 3-4 months, while larger projects, such as adding a second story, can take 6-9 months. Detailed planning and efficient project management are crucial to staying on schedule.

Seattle’s requirements for ADUs include:

  • Size: ADUs can be up to 1,000 sq. ft. or 40% of the main dwelling’s floor area.
  • Parking: No additional parking is required if within a half-mile of frequent transit service; otherwise, one parking space is required.
  • Compliance: Must adhere to all applicable building codes and zoning regulations.

Visit the Seattle City Government website for more information.

Service Areas

Other Service Areas

Don’t see your neighborhood listed? No problem! We are eager to hear about your project. Call us today, and let’s discuss how we can help. Proudly serving homeowners throughout Eastside andv Greater Seattle!