With over a decade of experience, we design and build ADUs and custom home additions that expand your living space, add value, and blend seamlessly with your home’s style.
Bellevue Experts in Custom Home Additions and ADU Construction
Professional Builder
- Licensed & Insured Local Contractor
- Expertise in Permits & Zoning
- Fixtures, Materials & Labor Included
- Custom Home Addition & ADU, DADU Solutions
- Quality Materials & Sustainable Practices
- Reliable, Experienced Craftsmanship
- Full Design & Project Planning
5 Star Rated Bellevue Construction Company
14
Years of
Experience
+150
Completed
Projects
FREE QUOTE FOR YOUR ADDITION OR ADU
Professional Addition & ADU Contractor
Seattle’s Eastside, WA
Our Comprehensive Addition & ADU Services Include
ADU Builder in Bellevue: With over a decade serving Bellevue homeowners, we bring proven craftsmanship to every Accessory Dwelling Unit project. From solid structural work to precise finishes, our team builds attached and detached ADUs designed for durability, comfort, and lasting value.
Home Additions in Bellevue: We specialize in high-quality home additions that meet practical needs while upholding our standards for fine construction. Whether you need extra bedrooms, a functional home office, or a dedicated in-law suite, our local knowledge and hands-on approach ensure a result you’ll appreciate for years.
- Garage Conversions
- Sunrooms
- In-law Suites
- Guest Suites
- Home Offices
- Basement Conversions
- Second Story Additions
- Kitchen Extensions
- Bathroom Additions
- Detached ADUs
- Attached ADUs
- Energy-Efficient Upgrades
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Complimentary Estimate and Expert Guidance from experienced Professionals.
Other Services in your Area
Our ADU and Addition Services
Attached ADUs
Connected to the main house for multi-gen living or rental income. Designed for a seamless tie-in and code compliance.
- Directly attached to home
- Shared Wall Structures
- Integrated Utilities
- Space-Efficient Layouts
Detached ADUs
Stand-alone backyard cottages for guests or rental. Built for privacy, durability, and local zoning compliance.
- Stand-Alone Structures
- Private Entrances
- Independent Utilities
- Flexible Use Options
Home Additions
Increase square footage with custom additions that match your home’s style and boost long-term value.
- New Bedrooms
- Home Offices
- In-Law Suites
- Seamless Integration
Home Extensions
Targeted expansions: kitchen, bathrooms, living, or sunroom planned for comfort, light, and energy efficiency.
- Enlarged Kitchens
- Spacious Living Rooms
- Added Sunrooms
- Seamless Integration
Why Choose BLC Remodeling LLC for Your Bellevue Home Additions and ADUs?
Licensed and Insured Bellevue Contractor
BLC Remodeling is fully licensed and insured to work in Bellevue and the Eastside, giving you the assurance that your project is handled to Washington State building standards. Our compliance with all safety regulations means your home addition or ADU is built on a solid legal and structural foundation.Proven Knowledge of Bellevue’s Building Requirements
Our team is familiar with Bellevue’s residential zoning codes, height limits, and setback rules. Whether your plan includes a detached ADU or a second-story addition, we guide you in aligning design and construction with city requirements, helping avoid costly plan changes or delays.Solutions Designed Around Your Home and Lifestyle
Every project starts with understanding how you use your space. We have built in-law suites with private entrances, garage conversions for multi-use spaces, and kitchen extensions that match the architectural details of Eastside homes. This approach ensures your new space looks intentional and functions well.Craftsmanship in Every Phase
From wood framing and load-bearing wall adjustments to precision tile work and built-in cabinetry, our construction process focuses on long-term durability and clean finishes. We source quality materials suited to Bellevue’s climate, such as moisture-resistant siding and energy-efficient windows, for lasting performance.Over a Decade Serving Bellevue Homeowners
Since 2011, we have completed home additions and ADUs across Bellevue neighborhoods like Somerset, Newport Hills, and Bridle Trails. Our hands-on approach, direct communication, and attention to structural integrity ensure your project is delivered on schedule and ready for decades of use.
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Achieve Your Dream Home With Our Process
Simplified Bellevue Home Extension Process
1.
Schedule a Consultation
2.
In-Home Assessment
3.
Receive a Detailed Quote
4.
Schedule and Begin Work
Start Your Home Transformation Today
Schedule Your Bellevue ADU or Addition Estimate
Call us anytime, we strive to answer all inquiries within 24 hours.
The project was actually delivered ahead of the contract schedule, which was a pleasant surprise. They work with licensed plumbers, electricians, and mechanical contractors, and they also handled all the necessary permits. Both the rough-in and final inspections passed on the first attempt.
The team not only did the main remodel but also helped with a lot of small extra tasks around the edges. They were very patient in adjusting cabinet alignments and doing touch-ups until everything looked perfect.
We especially appreciated their clear and timely communication. Any changes we requested were discussed and confirmed right away—for example, after the rough-in, we decided to add a vent hood duct, and they adjusted the plan smoothly without delaying the schedule.
Overall, the workmanship, professionalism, and customer service were excellent. We highly recommend BLC remodeling to anyone looking for a reliable and detail-oriented remodeling company.
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Frequently asked questions
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.
- Size: ADUs must be no larger than 1,200 sq. ft. or 40% of the combined area of the ADU and primary residence.
- Parking: No parking required for ADUs under 1,000 sq. ft. or within 1/2 mile of frequent transit. One off-street parking space for larger ADUs.
- Compliance: Must adhere to all construction codes, including building, electrical, fire, and plumbing.
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 and Greater Seattle!