Home Additions & Exteriors

Expand Your Living Space

Create the additional space your family needs with custom home additions and transform your home's exterior with expert craftsmanship. Our family-owned team delivers personalized service and quality construction throughout Shoreline, North Seattle, Edmonds, and surrounding areas.

Grow Your Home Without Moving

When your family outgrows your current space or your needs change, custom home additions and exterior improvements offer the perfect solution. These projects provide valuable benefits for homeowners in Shoreline and surrounding communities:

Gain much-needed living space without the stress of relocating
Increase your property’s market value and curb appeal
Create purpose-built spaces tailored to your specific needs
Preserve the neighborhood and community connections you love
Often more cost-effective than buying a larger home in today’s market
Enhance protection against Pacific Northwest weather conditions

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Our Home Addition Services

Customized Solutions for Every Need

Room Additions

Expand your living space with a seamlessly integrated room addition. Whether you need an extra bedroom, home office, playroom, or multi-purpose space, we build additions that complement your existing home's architecture while addressing your specific space requirements.

Second Story Additions

When lot size constraints limit outward expansion, building up offers the perfect solution. Our second-story additions maximize your home's footprint, potentially doubling your living space while maintaining your yard and outdoor areas. We carefully manage structural requirements and ensure minimal disruption to your daily life.

Primary Suite Expansions

Transform your living experience with a spacious primary bedroom suite addition. Create a personal sanctuary with a luxurious bathroom, walk-in closets, and perhaps a sitting area or private deck. These additions deliver exceptional comfort while significantly enhancing your home's value.

Kitchen Extensions

Expand your kitchen to create the gathering space your family deserves. Our kitchen additions provide additional prep space, room for dining, or the opportunity to incorporate features like islands, walk-in pantries, or breakfast nooks that transform how you experience your home.

Sunrooms & Four-Season Rooms

Bring the outdoors in while maintaining comfort year-round. Our sunroom and four-season room additions flood your home with natural light and provide versatile living space for relaxation, entertaining, or connecting with nature regardless of weather conditions.

Garage Conversions & Additions

Maximize your property's potential with garage conversions that transform underutilized space into functional living areas, or add a new garage that includes additional living space above. These efficient solutions often provide the most bang for your budget.

Our Exterior Services

Enhance Protection, Function & Curb Appeal

Complete Exterior Renovations

Transform your home's appearance and improve its weather resistance with comprehensive exterior updates. We can refresh or completely replace siding, trim, roofing, windows, and doors to create a cohesive, beautiful exterior that stands up to Pacific Northwest conditions.

Custom Deck Construction

Extend your living space outdoors with a custom-built deck designed for our regional climate. We create durable, beautiful decks using quality materials that withstand moisture while providing the perfect setting for relaxation and entertainment.

Roofing Replacement & Repair

Keep your home protected with roofing done right. We work with experienced subcontractors to make sure your roof has the proper underlayment, flashing, and ventilation it needs to prevent leaks and last longer.

Siding Installation

Enhance your home's protection and appearance with new siding installation. We work with fiber cement, cedar, engineered wood, and other quality materials suited to our climate, with proper moisture barriers and flashing for long-term performance.

Window & Door Replacement

Improve energy efficiency, security, and aesthetics with quality window and door replacements. We ensure proper installation with appropriate flashing and sealing to prevent water intrusion while enhancing your home's appearance.

Rot & Water Damage Repair

Address existing damage and prevent future problems with our expert rot and water damage restoration services. We identify and correct the source of moisture problems, replace damaged materials, and implement proper flashing and water management details.

Our Addition & Exterior Process

Your Path to Home Transformation

1. Initial Consultation We begin with a conversation about your space needs, vision, and budget to help us prepare for a productive in-home assessment.

2. Comprehensive Home Assessment We evaluate your existing structure, property limitations, and architectural style to determine the most appropriate strategy for your project.

3. Planning & Development Our team creates detailed plans addressing structural requirements, exterior aesthetics, and interior functionality to ensure a cohesive result.

4. Material & Finish Selection We guide you through selecting materials and finishes that complement your existing home while meeting your practical needs. We recommend trusted vendors and provide advice on product quality and performance, while you make the final aesthetic choices.

5. Permitting & Approvals We handle all necessary permits and approvals, navigating local building codes and regulations to ensure your project proceeds smoothly and legally.

6. Professional Construction Our skilled team executes your project with careful attention to structural integrity, energy efficiency, and seamless integration with your existing home.

7. Final Quality Inspection Before completion, we conduct thorough inspections to ensure everything meets building codes, our high standards, and your expectations.

Learn About Our Construction Standards

Project Considerations

Important Factors for Success

Architectural Integration

We carefully construct additions and exterior updates that complement your home’s existing architectural style, ensuring proper roof lines, window placement, and exterior finishes for a cohesive appearance that looks original to the home.

Structural Requirements

Our team addresses all structural considerations, from proper foundations and support systems to load-bearing requirements and seismic standards specific to the Pacific Northwest.

Energy Efficiency

We incorporate modern insulation, energy-efficient windows, and appropriate HVAC solutions to ensure your new space is comfortable year-round while minimizing impact on utility bills.

Weather Protection

Living in the Pacific Northwest means managing moisture. We implement proper flashing, drainage details, and moisture barriers to protect your home from our rainy climate.

Future Flexibility

We build with adaptability in mind, creating spaces that can evolve with your changing needs while maximizing your home’s long-term value and appeal.

Budget Optimization

Our experienced team helps you make informed decisions that maximize value within your budget, focusing resources where they matter most for functionality and return on investment.

Premium Materials We Use

Quality Construction for Lasting Value

We select durable, high-performance materials suited to the Pacific Northwest climate, including:

Quality Framing: Dimensional lumber and engineered wood products for structural integrity
Weather Protection: Premium moisture barriers, flashing systems, and drainage details to prevent water intrusion
Exterior Finishes: Durable siding, roofing, and trim materials that match your existing home
Energy-Efficient Windows: Double or triple-pane windows with appropriate ratings for our climate
Interior Materials: Quality drywall, flooring, trim, and cabinetry for beautiful, lasting interiors
Decking Materials: Composite, cedar, or pressure-treated lumber options for durability and appearance

Discuss Material Options

Project Transformations

Inspiration for Your Home

What Our Clients Say

    
 
 
       Posted on Google  
   
   Lia Schaefer 
 
 
 
 Trustindex verifies that the original source of the review is Google. We are really pleased with the work Read and his crew did on our house. They are professional, kind, and very communicative. I knew what was going on every step of the process and they worked fastly and efficiently. I felt I could really count on them to get the job done well and to show up every day bright and early ready to go. They were also open to feedback and last minute changes that came up. They handled any surprise complications with ease. This is so different from our prior experiences with other contractors. Definitely get in touch for your home project, you won’t be disappointed! Thank you Read, Geri, Miguel, and Andrew!
  
 
      Posted on Google  
   
   Louis O'Callaghan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Read and his crew did a great job on our siding project. When they found there was no sheathing underneath our damaged siding, they engineered a solution that wouldn't affect the look of the house and  worked with me to find ways to limit the extra cost. I'd work with them again.
  
 
      Posted on Google  
   
   Wendy Y 
 
 
 
 Trustindex verifies that the original source of the review is Google. Last spring, our hot water tank failed, leading to our entire basement being flooded. The basement had to be gutted, giving us a blank slate to work with. I had a vision of what I wanted, and Read and his team brought it to life. Read made my various ideas a reality and even handled electrical and plumbing work that would typically be subcontracted. A big shoutout to the team for their amazing work! They are professional, detail oriented, and easy to work with.  The craftsmanship is top-notch, and I’m thrilled with the finished product!
  
 
      Posted on Google  
   
   Casey Egan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Read and his team did a great job on our basement bathroom. They communicated clearly throughout the project, so we always knew what to expect. Overall, we’re very happy with how everything turned out!
  
 
      Posted on Google  
   
   Jaspreet Gill 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had a great experience working with Read and his team on our basement bathroom. They were easy to work with and the workmanship was great. We’re thrilled with how they brought our vision to life!
  
 
      Posted on Google  
   
   Joe Pham 
 
 
 
 Trustindex verifies that the original source of the review is Google. We're so happy with Constant Northwest Construction Services, we remodeled down from the studs in our split home, the basement had a flood from our water heater.  The crew's work was amazing, they were very responsive to our needs, was easy to work with, and each and every day we saw progress.  We've heard horror stories from other construction companies, but Read's team is amazing and he did great coordination with the plumbers and electricians.  Read's crew does everything in including drywall, floor install, bathroom remodel.  They do practically every renovation with exceptional work, I recommend them with your future renovations.
  
 
      Posted on Google  
   
   Neal Hallmark 
 
 
 
 Trustindex verifies that the original source of the review is Google. Read, Andrew and Gerry were great guys to work with. I had them out to repair some rodent trim damage too high for me to reach along with an another decaying fascia board. Read gave me a clear and fair estimate, the guys showed up on time, we talked through the project, and they had it done quickly. Look forward to having these guys out in the future!
  
 
      Posted on Google  
   
   Molly Cook 
 
 
 
 Trustindex verifies that the original source of the review is Google. We used Constant Northwest to help spruce up our house for resale. They were fast and good!
  
 
      Posted on Google  
   
   Sarah Kwiatkowski 
 
 
 
 Trustindex verifies that the original source of the review is Google. Please be cautious with this company. They attempted to overcharge us by tens of thousands of dollars and only after vigorously pushing back and providing proof of our own records did they back down admitting their bad accounting practices. At the end they did not complete the work but haggled over final payment. Read was incredibly nonresponsive and rarely present at the job site leaving much of the project management to us as the homeowners. This means that significant errors were made requiring re-work and additional expense and time for the project. Also, his team took advantage that I worked from home interrupting my work day constantly with questions that he should have handled / managed. The experience was very poor and I would not recommend this company.

Addition & Exterior FAQs

How long does a typical addition or exterior renovation take?

Most additions require 2-4 months from start to finish, depending on size and complexity. Exterior renovations typically take 2-6 weeks, weather permitting. Factors affecting timeline include complexity, permitting requirements, material availability, and weather conditions. We provide a detailed timeline during the planning phase.

What do home additions and exterior renovations cost in the Shoreline area?

Addition costs in Shoreline typically range from $200-$400 per square foot, depending on the type of space, level of finishes, and structural requirements. Exterior renovations vary widely, with full replacements typically costing $25,000-$75,000 depending on home size and materials chosen. During our consultation process, we’ll provide transparent pricing based on your specific project scope.

Will my addition match my existing home?

Absolutely. We take great care to build additions that complement your home’s architectural style, matching rooflines, exterior finishes, window styles, and interior details for a seamless integration that looks original to the home.

When is the best time to schedule exterior renovations in the Pacific Northwest?

While we can work year-round with appropriate weather protection, the optimal time for exterior projects is typically April through October when we experience drier conditions. That said, our experience with the local climate allows us to work effectively during other seasons as well by implementing proper protection measures.

Can we live in our home during construction?

In most cases, yes. We take steps to minimize disruption, including creating dust barriers, maintaining safe work areas, and coordinating schedules to reduce impact on your daily routine. For major additions, some phases may create temporary inconveniences, which we’ll discuss during planning.

Do you handle all permits and inspections?

Yes, we manage all required permits, variances if needed, and coordinate inspections with local authorities. Our familiarity with building codes in Shoreline and surrounding areas helps ensure a smooth approval process.

Contact Us Today

Ready to Transform Your Home?

Whether you need more living space, want to enhance your home's exterior, or both, our experienced team is ready to bring your vision to life. From consultation through final walkthrough, we'll guide you through every step, ensuring a smooth experience and exceptional results. Contact us today to schedule your free consultation.

Schedule Your Free Consultation